2 * Mesa 3-D graphics library
4 * Copyright (C) 2005-2007 Brian Paul All Rights Reserved.
5 * Copyright (C) 2008 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 * \file slang_codegen.c
27 * Generate IR tree from AST.
34 *** The new_() functions return a new instance of a simple IR node.
35 *** The gen_() functions generate larger IR trees from the simple nodes.
40 #include "main/imports.h"
41 #include "main/macros.h"
42 #include "main/mtypes.h"
43 #include "shader/program.h"
44 #include "shader/prog_instruction.h"
45 #include "shader/prog_parameter.h"
46 #include "shader/prog_print.h"
47 #include "shader/prog_statevars.h"
48 #include "slang_typeinfo.h"
49 #include "slang_codegen.h"
50 #include "slang_compile.h"
51 #include "slang_label.h"
52 #include "slang_mem.h"
53 #include "slang_simplify.h"
54 #include "slang_emit.h"
55 #include "slang_vartable.h"
57 #include "slang_print.h"
60 /** Max iterations to unroll */
61 const GLuint MAX_FOR_LOOP_UNROLL_ITERATIONS
= 32;
63 /** Max for-loop body size (in slang operations) to unroll */
64 const GLuint MAX_FOR_LOOP_UNROLL_BODY_SIZE
= 50;
66 /** Max for-loop body complexity to unroll.
67 * We'll compute complexity as the product of the number of iterations
68 * and the size of the body. So long-ish loops with very simple bodies
69 * can be unrolled, as well as short loops with larger bodies.
71 const GLuint MAX_FOR_LOOP_UNROLL_COMPLEXITY
= 256;
75 static slang_ir_node
*
76 _slang_gen_operation(slang_assemble_ctx
* A
, slang_operation
*oper
);
80 * Retrieves type information about an operation.
81 * Returns GL_TRUE on success.
82 * Returns GL_FALSE otherwise.
85 typeof_operation(const struct slang_assemble_ctx_
*A
,
89 return _slang_typeof_operation(op
, &A
->space
, ti
, A
->atoms
, A
->log
);
94 is_sampler_type(const slang_fully_specified_type
*t
)
96 switch (t
->specifier
.type
) {
97 case SLANG_SPEC_SAMPLER1D
:
98 case SLANG_SPEC_SAMPLER2D
:
99 case SLANG_SPEC_SAMPLER3D
:
100 case SLANG_SPEC_SAMPLERCUBE
:
101 case SLANG_SPEC_SAMPLER1DSHADOW
:
102 case SLANG_SPEC_SAMPLER2DSHADOW
:
103 case SLANG_SPEC_SAMPLER2DRECT
:
104 case SLANG_SPEC_SAMPLER2DRECTSHADOW
:
113 * Return the offset (in floats or ints) of the named field within
114 * the given struct. Return -1 if field not found.
115 * If field is NULL, return the size of the struct instead.
118 _slang_field_offset(const slang_type_specifier
*spec
, slang_atom field
)
122 for (i
= 0; i
< spec
->_struct
->fields
->num_variables
; i
++) {
123 const slang_variable
*v
= spec
->_struct
->fields
->variables
[i
];
124 const GLuint sz
= _slang_sizeof_type_specifier(&v
->type
.specifier
);
126 /* types larger than 1 float are register (4-float) aligned */
127 offset
= (offset
+ 3) & ~3;
129 if (field
&& v
->a_name
== field
) {
135 return -1; /* field not found */
137 return offset
; /* struct size */
142 * Return the size (in floats) of the given type specifier.
143 * If the size is greater than 4, the size should be a multiple of 4
144 * so that the correct number of 4-float registers are allocated.
145 * For example, a mat3x2 is size 12 because we want to store the
146 * 3 columns in 3 float[4] registers.
149 _slang_sizeof_type_specifier(const slang_type_specifier
*spec
)
152 switch (spec
->type
) {
153 case SLANG_SPEC_VOID
:
156 case SLANG_SPEC_BOOL
:
159 case SLANG_SPEC_BVEC2
:
162 case SLANG_SPEC_BVEC3
:
165 case SLANG_SPEC_BVEC4
:
171 case SLANG_SPEC_IVEC2
:
174 case SLANG_SPEC_IVEC3
:
177 case SLANG_SPEC_IVEC4
:
180 case SLANG_SPEC_FLOAT
:
183 case SLANG_SPEC_VEC2
:
186 case SLANG_SPEC_VEC3
:
189 case SLANG_SPEC_VEC4
:
192 case SLANG_SPEC_MAT2
:
193 sz
= 2 * 4; /* 2 columns (regs) */
195 case SLANG_SPEC_MAT3
:
198 case SLANG_SPEC_MAT4
:
201 case SLANG_SPEC_MAT23
:
202 sz
= 2 * 4; /* 2 columns (regs) */
204 case SLANG_SPEC_MAT32
:
205 sz
= 3 * 4; /* 3 columns (regs) */
207 case SLANG_SPEC_MAT24
:
210 case SLANG_SPEC_MAT42
:
211 sz
= 4 * 4; /* 4 columns (regs) */
213 case SLANG_SPEC_MAT34
:
216 case SLANG_SPEC_MAT43
:
217 sz
= 4 * 4; /* 4 columns (regs) */
219 case SLANG_SPEC_SAMPLER1D
:
220 case SLANG_SPEC_SAMPLER2D
:
221 case SLANG_SPEC_SAMPLER3D
:
222 case SLANG_SPEC_SAMPLERCUBE
:
223 case SLANG_SPEC_SAMPLER1DSHADOW
:
224 case SLANG_SPEC_SAMPLER2DSHADOW
:
225 case SLANG_SPEC_SAMPLER2DRECT
:
226 case SLANG_SPEC_SAMPLER2DRECTSHADOW
:
227 sz
= 1; /* a sampler is basically just an integer index */
229 case SLANG_SPEC_STRUCT
:
230 sz
= _slang_field_offset(spec
, 0); /* special use */
232 /* 1-float structs are actually troublesome to deal with since they
233 * might get placed at R.x, R.y, R.z or R.z. Return size=2 to
234 * ensure the object is placed at R.x
239 sz
= (sz
+ 3) & ~0x3; /* round up to multiple of four */
242 case SLANG_SPEC_ARRAY
:
243 sz
= _slang_sizeof_type_specifier(spec
->_array
);
246 _mesa_problem(NULL
, "Unexpected type in _slang_sizeof_type_specifier()");
251 /* if size is > 4, it should be a multiple of four */
252 assert((sz
& 0x3) == 0);
259 * Query variable/array length (number of elements).
260 * This is slightly non-trivial because there are two ways to express
261 * arrays: "float x[3]" vs. "float[3] x".
262 * \return the length of the array for the given variable, or 0 if not an array
265 _slang_array_length(const slang_variable
*var
)
267 if (var
->type
.array_len
> 0) {
268 /* Ex: float[4] x; */
269 return var
->type
.array_len
;
271 if (var
->array_len
> 0) {
272 /* Ex: float x[4]; */
273 return var
->array_len
;
280 * Compute total size of array give size of element, number of elements.
281 * \return size in floats
284 _slang_array_size(GLint elemSize
, GLint arrayLen
)
287 assert(elemSize
> 0);
289 /* round up base type to multiple of 4 */
290 total
= ((elemSize
+ 3) & ~0x3) * MAX2(arrayLen
, 1);
300 * Return the TEXTURE_*_INDEX value that corresponds to a sampler type,
301 * or -1 if the type is not a sampler.
304 sampler_to_texture_index(const slang_type_specifier_type type
)
307 case SLANG_SPEC_SAMPLER1D
:
308 return TEXTURE_1D_INDEX
;
309 case SLANG_SPEC_SAMPLER2D
:
310 return TEXTURE_2D_INDEX
;
311 case SLANG_SPEC_SAMPLER3D
:
312 return TEXTURE_3D_INDEX
;
313 case SLANG_SPEC_SAMPLERCUBE
:
314 return TEXTURE_CUBE_INDEX
;
315 case SLANG_SPEC_SAMPLER1DSHADOW
:
316 return TEXTURE_1D_INDEX
; /* XXX fix */
317 case SLANG_SPEC_SAMPLER2DSHADOW
:
318 return TEXTURE_2D_INDEX
; /* XXX fix */
319 case SLANG_SPEC_SAMPLER2DRECT
:
320 return TEXTURE_RECT_INDEX
;
321 case SLANG_SPEC_SAMPLER2DRECTSHADOW
:
322 return TEXTURE_RECT_INDEX
; /* XXX fix */
329 /** helper to build a SLANG_OPER_IDENTIFIER node */
331 slang_operation_identifier(slang_operation
*oper
,
332 slang_assemble_ctx
*A
,
335 oper
->type
= SLANG_OPER_IDENTIFIER
;
336 oper
->a_id
= slang_atom_pool_atom(A
->atoms
, name
);
340 #define SWIZZLE_ZWWW MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_W, SWIZZLE_W, SWIZZLE_W)
343 * Return the VERT_ATTRIB_* or FRAG_ATTRIB_* value that corresponds to
344 * a vertex or fragment program input variable. Return -1 if the input
346 * XXX return size too
349 _slang_input_index(const char *name
, GLenum target
, GLuint
*swizzleOut
)
356 static const struct input_info vertInputs
[] = {
357 { "gl_Vertex", VERT_ATTRIB_POS
, SWIZZLE_NOOP
},
358 { "gl_Normal", VERT_ATTRIB_NORMAL
, SWIZZLE_NOOP
},
359 { "gl_Color", VERT_ATTRIB_COLOR0
, SWIZZLE_NOOP
},
360 { "gl_SecondaryColor", VERT_ATTRIB_COLOR1
, SWIZZLE_NOOP
},
361 { "gl_FogCoord", VERT_ATTRIB_FOG
, SWIZZLE_XXXX
},
362 { "gl_MultiTexCoord0", VERT_ATTRIB_TEX0
, SWIZZLE_NOOP
},
363 { "gl_MultiTexCoord1", VERT_ATTRIB_TEX1
, SWIZZLE_NOOP
},
364 { "gl_MultiTexCoord2", VERT_ATTRIB_TEX2
, SWIZZLE_NOOP
},
365 { "gl_MultiTexCoord3", VERT_ATTRIB_TEX3
, SWIZZLE_NOOP
},
366 { "gl_MultiTexCoord4", VERT_ATTRIB_TEX4
, SWIZZLE_NOOP
},
367 { "gl_MultiTexCoord5", VERT_ATTRIB_TEX5
, SWIZZLE_NOOP
},
368 { "gl_MultiTexCoord6", VERT_ATTRIB_TEX6
, SWIZZLE_NOOP
},
369 { "gl_MultiTexCoord7", VERT_ATTRIB_TEX7
, SWIZZLE_NOOP
},
370 { NULL
, 0, SWIZZLE_NOOP
}
372 static const struct input_info fragInputs
[] = {
373 { "gl_FragCoord", FRAG_ATTRIB_WPOS
, SWIZZLE_NOOP
},
374 { "gl_Color", FRAG_ATTRIB_COL0
, SWIZZLE_NOOP
},
375 { "gl_SecondaryColor", FRAG_ATTRIB_COL1
, SWIZZLE_NOOP
},
376 { "gl_TexCoord", FRAG_ATTRIB_TEX0
, SWIZZLE_NOOP
},
377 /* note: we're packing several quantities into the fogcoord vector */
378 { "gl_FogFragCoord", FRAG_ATTRIB_FOGC
, SWIZZLE_XXXX
},
379 { "gl_FrontFacing", FRAG_ATTRIB_FOGC
, SWIZZLE_YYYY
}, /*XXX*/
380 { "gl_PointCoord", FRAG_ATTRIB_FOGC
, SWIZZLE_ZWWW
},
381 { NULL
, 0, SWIZZLE_NOOP
}
384 const struct input_info
*inputs
385 = (target
== GL_VERTEX_PROGRAM_ARB
) ? vertInputs
: fragInputs
;
387 ASSERT(MAX_TEXTURE_COORD_UNITS
== 8); /* if this fails, fix vertInputs above */
389 for (i
= 0; inputs
[i
].Name
; i
++) {
390 if (strcmp(inputs
[i
].Name
, name
) == 0) {
392 *swizzleOut
= inputs
[i
].Swizzle
;
393 return inputs
[i
].Attrib
;
401 * Return the VERT_RESULT_* or FRAG_RESULT_* value that corresponds to
402 * a vertex or fragment program output variable. Return -1 for an invalid
406 _slang_output_index(const char *name
, GLenum target
)
412 static const struct output_info vertOutputs
[] = {
413 { "gl_Position", VERT_RESULT_HPOS
},
414 { "gl_FrontColor", VERT_RESULT_COL0
},
415 { "gl_BackColor", VERT_RESULT_BFC0
},
416 { "gl_FrontSecondaryColor", VERT_RESULT_COL1
},
417 { "gl_BackSecondaryColor", VERT_RESULT_BFC1
},
418 { "gl_TexCoord", VERT_RESULT_TEX0
},
419 { "gl_FogFragCoord", VERT_RESULT_FOGC
},
420 { "gl_PointSize", VERT_RESULT_PSIZ
},
423 static const struct output_info fragOutputs
[] = {
424 { "gl_FragColor", FRAG_RESULT_COLOR
},
425 { "gl_FragDepth", FRAG_RESULT_DEPTH
},
426 { "gl_FragData", FRAG_RESULT_DATA0
},
430 const struct output_info
*outputs
431 = (target
== GL_VERTEX_PROGRAM_ARB
) ? vertOutputs
: fragOutputs
;
433 for (i
= 0; outputs
[i
].Name
; i
++) {
434 if (strcmp(outputs
[i
].Name
, name
) == 0) {
436 return outputs
[i
].Attrib
;
444 /**********************************************************************/
448 * Map "_asm foo" to IR_FOO, etc.
453 slang_ir_opcode Opcode
;
454 GLuint HaveRetValue
, NumParams
;
458 static slang_asm_info AsmInfo
[] = {
460 { "vec4_add", IR_ADD
, 1, 2 },
461 { "vec4_subtract", IR_SUB
, 1, 2 },
462 { "vec4_multiply", IR_MUL
, 1, 2 },
463 { "vec4_dot", IR_DOT4
, 1, 2 },
464 { "vec3_dot", IR_DOT3
, 1, 2 },
465 { "vec2_dot", IR_DOT2
, 1, 2 },
466 { "vec3_nrm", IR_NRM3
, 1, 1 },
467 { "vec4_nrm", IR_NRM4
, 1, 1 },
468 { "vec3_cross", IR_CROSS
, 1, 2 },
469 { "vec4_lrp", IR_LRP
, 1, 3 },
470 { "vec4_min", IR_MIN
, 1, 2 },
471 { "vec4_max", IR_MAX
, 1, 2 },
472 { "vec4_clamp", IR_CLAMP
, 1, 3 },
473 { "vec4_seq", IR_SEQUAL
, 1, 2 },
474 { "vec4_sne", IR_SNEQUAL
, 1, 2 },
475 { "vec4_sge", IR_SGE
, 1, 2 },
476 { "vec4_sgt", IR_SGT
, 1, 2 },
477 { "vec4_sle", IR_SLE
, 1, 2 },
478 { "vec4_slt", IR_SLT
, 1, 2 },
480 { "vec4_move", IR_MOVE
, 1, 1 },
481 { "vec4_floor", IR_FLOOR
, 1, 1 },
482 { "vec4_frac", IR_FRAC
, 1, 1 },
483 { "vec4_abs", IR_ABS
, 1, 1 },
484 { "vec4_negate", IR_NEG
, 1, 1 },
485 { "vec4_ddx", IR_DDX
, 1, 1 },
486 { "vec4_ddy", IR_DDY
, 1, 1 },
487 /* float binary op */
488 { "float_power", IR_POW
, 1, 2 },
489 /* texture / sampler */
490 { "vec4_tex_1d", IR_TEX
, 1, 2 },
491 { "vec4_tex_1d_bias", IR_TEXB
, 1, 2 }, /* 1d w/ bias */
492 { "vec4_tex_1d_proj", IR_TEXP
, 1, 2 }, /* 1d w/ projection */
493 { "vec4_tex_2d", IR_TEX
, 1, 2 },
494 { "vec4_tex_2d_bias", IR_TEXB
, 1, 2 }, /* 2d w/ bias */
495 { "vec4_tex_2d_proj", IR_TEXP
, 1, 2 }, /* 2d w/ projection */
496 { "vec4_tex_3d", IR_TEX
, 1, 2 },
497 { "vec4_tex_3d_bias", IR_TEXB
, 1, 2 }, /* 3d w/ bias */
498 { "vec4_tex_3d_proj", IR_TEXP
, 1, 2 }, /* 3d w/ projection */
499 { "vec4_tex_cube", IR_TEX
, 1, 2 }, /* cubemap */
500 { "vec4_tex_rect", IR_TEX
, 1, 2 }, /* rectangle */
501 { "vec4_tex_rect_bias", IR_TEX
, 1, 2 }, /* rectangle w/ projection */
503 /* texture / sampler but with shadow comparison */
504 { "vec4_tex_1d_shadow", IR_TEX_SH
, 1, 2 },
505 { "vec4_tex_1d_bias_shadow", IR_TEXB_SH
, 1, 2 },
506 { "vec4_tex_1d_proj_shadow", IR_TEXP_SH
, 1, 2 },
507 { "vec4_tex_2d_shadow", IR_TEX_SH
, 1, 2 },
508 { "vec4_tex_2d_bias_shadow", IR_TEXB_SH
, 1, 2 },
509 { "vec4_tex_2d_proj_shadow", IR_TEXP_SH
, 1, 2 },
510 { "vec4_tex_rect_shadow", IR_TEX_SH
, 1, 2 },
511 { "vec4_tex_rect_proj_shadow", IR_TEXP_SH
, 1, 2 },
514 { "ivec4_to_vec4", IR_I_TO_F
, 1, 1 }, /* int[4] to float[4] */
515 { "vec4_to_ivec4", IR_F_TO_I
, 1, 1 }, /* float[4] to int[4] */
516 { "float_exp", IR_EXP
, 1, 1 },
517 { "float_exp2", IR_EXP2
, 1, 1 },
518 { "float_log2", IR_LOG2
, 1, 1 },
519 { "float_rsq", IR_RSQ
, 1, 1 },
520 { "float_rcp", IR_RCP
, 1, 1 },
521 { "float_sine", IR_SIN
, 1, 1 },
522 { "float_cosine", IR_COS
, 1, 1 },
523 { "float_noise1", IR_NOISE1
, 1, 1},
524 { "float_noise2", IR_NOISE2
, 1, 1},
525 { "float_noise3", IR_NOISE3
, 1, 1},
526 { "float_noise4", IR_NOISE4
, 1, 1},
528 { NULL
, IR_NOP
, 0, 0 }
532 static slang_ir_node
*
533 new_node3(slang_ir_opcode op
,
534 slang_ir_node
*c0
, slang_ir_node
*c1
, slang_ir_node
*c2
)
536 slang_ir_node
*n
= (slang_ir_node
*) _slang_alloc(sizeof(slang_ir_node
));
542 n
->InstLocation
= -1;
547 static slang_ir_node
*
548 new_node2(slang_ir_opcode op
, slang_ir_node
*c0
, slang_ir_node
*c1
)
550 return new_node3(op
, c0
, c1
, NULL
);
553 static slang_ir_node
*
554 new_node1(slang_ir_opcode op
, slang_ir_node
*c0
)
556 return new_node3(op
, c0
, NULL
, NULL
);
559 static slang_ir_node
*
560 new_node0(slang_ir_opcode op
)
562 return new_node3(op
, NULL
, NULL
, NULL
);
567 * Create sequence of two nodes.
569 static slang_ir_node
*
570 new_seq(slang_ir_node
*left
, slang_ir_node
*right
)
576 return new_node2(IR_SEQ
, left
, right
);
579 static slang_ir_node
*
580 new_label(slang_label
*label
)
582 slang_ir_node
*n
= new_node0(IR_LABEL
);
589 static slang_ir_node
*
590 new_float_literal(const float v
[4], GLuint size
)
592 slang_ir_node
*n
= new_node0(IR_FLOAT
);
594 COPY_4V(n
->Value
, v
);
595 /* allocate a storage object, but compute actual location (Index) later */
596 n
->Store
= _slang_new_ir_storage(PROGRAM_CONSTANT
, -1, size
);
601 static slang_ir_node
*
602 new_not(slang_ir_node
*n
)
604 return new_node1(IR_NOT
, n
);
609 * Non-inlined function call.
611 static slang_ir_node
*
612 new_function_call(slang_ir_node
*code
, slang_label
*name
)
614 slang_ir_node
*n
= new_node1(IR_CALL
, code
);
623 * Unconditional jump.
625 static slang_ir_node
*
626 new_return(slang_label
*dest
)
628 slang_ir_node
*n
= new_node0(IR_RETURN
);
636 static slang_ir_node
*
637 new_loop(slang_ir_node
*body
)
639 return new_node1(IR_LOOP
, body
);
643 static slang_ir_node
*
644 new_break(slang_ir_node
*loopNode
)
646 slang_ir_node
*n
= new_node0(IR_BREAK
);
648 assert(loopNode
->Opcode
== IR_LOOP
);
650 /* insert this node at head of linked list */
651 n
->List
= loopNode
->List
;
659 * Make new IR_BREAK_IF_TRUE.
661 static slang_ir_node
*
662 new_break_if_true(slang_ir_node
*loopNode
, slang_ir_node
*cond
)
666 assert(loopNode
->Opcode
== IR_LOOP
);
667 n
= new_node1(IR_BREAK_IF_TRUE
, cond
);
669 /* insert this node at head of linked list */
670 n
->List
= loopNode
->List
;
678 * Make new IR_CONT_IF_TRUE node.
680 static slang_ir_node
*
681 new_cont_if_true(slang_ir_node
*loopNode
, slang_ir_node
*cond
)
685 assert(loopNode
->Opcode
== IR_LOOP
);
686 n
= new_node1(IR_CONT_IF_TRUE
, cond
);
688 /* insert this node at head of linked list */
689 n
->List
= loopNode
->List
;
696 static slang_ir_node
*
697 new_cond(slang_ir_node
*n
)
699 slang_ir_node
*c
= new_node1(IR_COND
, n
);
704 static slang_ir_node
*
705 new_if(slang_ir_node
*cond
, slang_ir_node
*ifPart
, slang_ir_node
*elsePart
)
707 return new_node3(IR_IF
, cond
, ifPart
, elsePart
);
712 * New IR_VAR node - a reference to a previously declared variable.
714 static slang_ir_node
*
715 new_var(slang_assemble_ctx
*A
, slang_variable
*var
)
717 slang_ir_node
*n
= new_node0(IR_VAR
);
724 /* Set IR node's Var and Store pointers */
726 n
->Store
= var
->store
;
733 * Check if the given function is really just a wrapper for a
734 * basic assembly instruction.
737 slang_is_asm_function(const slang_function
*fun
)
739 if (fun
->body
->type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
&&
740 fun
->body
->num_children
== 1 &&
741 fun
->body
->children
[0].type
== SLANG_OPER_ASM
) {
749 _slang_is_noop(const slang_operation
*oper
)
752 oper
->type
== SLANG_OPER_VOID
||
753 (oper
->num_children
== 1 && oper
->children
[0].type
== SLANG_OPER_VOID
))
761 * Recursively search tree for a node of the given type.
763 static slang_operation
*
764 _slang_find_node_type(slang_operation
*oper
, slang_operation_type type
)
767 if (oper
->type
== type
)
769 for (i
= 0; i
< oper
->num_children
; i
++) {
770 slang_operation
*p
= _slang_find_node_type(&oper
->children
[i
], type
);
779 * Count the number of operations of the given time rooted at 'oper'.
782 _slang_count_node_type(slang_operation
*oper
, slang_operation_type type
)
785 if (oper
->type
== type
) {
788 for (i
= 0; i
< oper
->num_children
; i
++) {
789 count
+= _slang_count_node_type(&oper
->children
[i
], type
);
796 * Check if the 'return' statement found under 'oper' is a "tail return"
797 * that can be no-op'd. For example:
802 * return; // this is a no-op
805 * This is used when determining if a function can be inlined. If the
806 * 'return' is not the last statement, we can't inline the function since
807 * we still need the semantic behaviour of the 'return' but we don't want
808 * to accidentally return from the _calling_ function. We'd need to use an
809 * unconditional branch, but we don't have such a GPU instruction (not
813 _slang_is_tail_return(const slang_operation
*oper
)
815 GLuint k
= oper
->num_children
;
818 const slang_operation
*last
= &oper
->children
[k
- 1];
819 if (last
->type
== SLANG_OPER_RETURN
)
821 else if (last
->type
== SLANG_OPER_IDENTIFIER
||
822 last
->type
== SLANG_OPER_LABEL
)
823 k
--; /* try prev child */
824 else if (last
->type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
||
825 last
->type
== SLANG_OPER_BLOCK_NEW_SCOPE
)
826 /* try sub-children */
827 return _slang_is_tail_return(last
);
837 slang_resolve_variable(slang_operation
*oper
)
839 if (oper
->type
== SLANG_OPER_IDENTIFIER
&& !oper
->var
) {
840 oper
->var
= _slang_variable_locate(oper
->locals
, oper
->a_id
, GL_TRUE
);
846 * Replace particular variables (SLANG_OPER_IDENTIFIER) with new expressions.
849 slang_substitute(slang_assemble_ctx
*A
, slang_operation
*oper
,
850 GLuint substCount
, slang_variable
**substOld
,
851 slang_operation
**substNew
, GLboolean isLHS
)
853 switch (oper
->type
) {
854 case SLANG_OPER_VARIABLE_DECL
:
856 slang_variable
*v
= _slang_variable_locate(oper
->locals
,
857 oper
->a_id
, GL_TRUE
);
859 if (v
->initializer
&& oper
->num_children
== 0) {
860 /* set child of oper to copy of initializer */
861 oper
->num_children
= 1;
862 oper
->children
= slang_operation_new(1);
863 slang_operation_copy(&oper
->children
[0], v
->initializer
);
865 if (oper
->num_children
== 1) {
866 /* the initializer */
867 slang_substitute(A
, &oper
->children
[0], substCount
,
868 substOld
, substNew
, GL_FALSE
);
872 case SLANG_OPER_IDENTIFIER
:
873 assert(oper
->num_children
== 0);
874 if (1/**!isLHS XXX FIX */) {
875 slang_atom id
= oper
->a_id
;
878 v
= _slang_variable_locate(oper
->locals
, id
, GL_TRUE
);
880 _mesa_problem(NULL
, "var %s not found!\n", (char *) oper
->a_id
);
884 /* look for a substitution */
885 for (i
= 0; i
< substCount
; i
++) {
886 if (v
== substOld
[i
]) {
887 /* OK, replace this SLANG_OPER_IDENTIFIER with a new expr */
888 #if 0 /* DEBUG only */
889 if (substNew
[i
]->type
== SLANG_OPER_IDENTIFIER
) {
890 assert(substNew
[i
]->var
);
891 assert(substNew
[i
]->var
->a_name
);
892 printf("Substitute %s with %s in id node %p\n",
893 (char*)v
->a_name
, (char*) substNew
[i
]->var
->a_name
,
897 printf("Substitute %s with %f in id node %p\n",
898 (char*)v
->a_name
, substNew
[i
]->literal
[0],
902 slang_operation_copy(oper
, substNew
[i
]);
909 case SLANG_OPER_RETURN
:
910 /* do return replacement here too */
911 assert(oper
->num_children
== 0 || oper
->num_children
== 1);
912 if (oper
->num_children
== 1 && !_slang_is_noop(&oper
->children
[0])) {
918 * then do substitutions on the assignment.
920 slang_operation
*blockOper
, *assignOper
, *returnOper
;
922 /* check if function actually has a return type */
923 assert(A
->CurFunction
);
924 if (A
->CurFunction
->header
.type
.specifier
.type
== SLANG_SPEC_VOID
) {
925 slang_info_log_error(A
->log
, "illegal return expression");
929 blockOper
= slang_operation_new(1);
930 blockOper
->type
= SLANG_OPER_BLOCK_NO_NEW_SCOPE
;
931 blockOper
->num_children
= 2;
932 blockOper
->locals
->outer_scope
= oper
->locals
->outer_scope
;
933 blockOper
->children
= slang_operation_new(2);
934 assignOper
= blockOper
->children
+ 0;
935 returnOper
= blockOper
->children
+ 1;
937 assignOper
->type
= SLANG_OPER_ASSIGN
;
938 assignOper
->num_children
= 2;
939 assignOper
->locals
->outer_scope
= blockOper
->locals
;
940 assignOper
->children
= slang_operation_new(2);
941 assignOper
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
942 assignOper
->children
[0].a_id
= slang_atom_pool_atom(A
->atoms
, "__retVal");
943 assignOper
->children
[0].locals
->outer_scope
= assignOper
->locals
;
945 slang_operation_copy(&assignOper
->children
[1],
948 returnOper
->type
= SLANG_OPER_RETURN
; /* return w/ no value */
949 assert(returnOper
->num_children
== 0);
951 /* do substitutions on the "__retVal = expr" sub-tree */
952 slang_substitute(A
, assignOper
,
953 substCount
, substOld
, substNew
, GL_FALSE
);
955 /* install new code */
956 slang_operation_copy(oper
, blockOper
);
957 slang_operation_destruct(blockOper
);
960 /* check if return value was expected */
961 assert(A
->CurFunction
);
962 if (A
->CurFunction
->header
.type
.specifier
.type
!= SLANG_SPEC_VOID
) {
963 slang_info_log_error(A
->log
, "return statement requires an expression");
969 case SLANG_OPER_ASSIGN
:
970 case SLANG_OPER_SUBSCRIPT
:
972 * child[0] can't have substitutions but child[1] can.
974 slang_substitute(A
, &oper
->children
[0],
975 substCount
, substOld
, substNew
, GL_TRUE
);
976 slang_substitute(A
, &oper
->children
[1],
977 substCount
, substOld
, substNew
, GL_FALSE
);
979 case SLANG_OPER_FIELD
:
981 slang_substitute(A
, &oper
->children
[0],
982 substCount
, substOld
, substNew
, GL_TRUE
);
987 for (i
= 0; i
< oper
->num_children
; i
++)
988 slang_substitute(A
, &oper
->children
[i
],
989 substCount
, substOld
, substNew
, GL_FALSE
);
996 * Produce inline code for a call to an assembly instruction.
997 * This is typically used to compile a call to a built-in function like this:
999 * vec4 mix(const vec4 x, const vec4 y, const vec4 a)
1001 * __asm vec4_lrp __retVal, a, y, x;
1006 * r = mix(p1, p2, p3);
1016 * We basically translate a SLANG_OPER_CALL into a SLANG_OPER_ASM.
1018 static slang_operation
*
1019 slang_inline_asm_function(slang_assemble_ctx
*A
,
1020 slang_function
*fun
, slang_operation
*oper
)
1022 const GLuint numArgs
= oper
->num_children
;
1024 slang_operation
*inlined
;
1025 const GLboolean haveRetValue
= _slang_function_has_return_value(fun
);
1026 slang_variable
**substOld
;
1027 slang_operation
**substNew
;
1029 ASSERT(slang_is_asm_function(fun
));
1030 ASSERT(fun
->param_count
== numArgs
+ haveRetValue
);
1033 printf("Inline %s as %s\n",
1034 (char*) fun->header.a_name,
1035 (char*) fun->body->children[0].a_id);
1039 * We'll substitute formal params with actual args in the asm call.
1041 substOld
= (slang_variable
**)
1042 _slang_alloc(numArgs
* sizeof(slang_variable
*));
1043 substNew
= (slang_operation
**)
1044 _slang_alloc(numArgs
* sizeof(slang_operation
*));
1045 for (i
= 0; i
< numArgs
; i
++) {
1046 substOld
[i
] = fun
->parameters
->variables
[i
];
1047 substNew
[i
] = oper
->children
+ i
;
1050 /* make a copy of the code to inline */
1051 inlined
= slang_operation_new(1);
1052 slang_operation_copy(inlined
, &fun
->body
->children
[0]);
1054 /* get rid of the __retVal child */
1055 inlined
->num_children
--;
1056 for (i
= 0; i
< inlined
->num_children
; i
++) {
1057 inlined
->children
[i
] = inlined
->children
[i
+ 1];
1061 /* now do formal->actual substitutions */
1062 slang_substitute(A
, inlined
, numArgs
, substOld
, substNew
, GL_FALSE
);
1064 _slang_free(substOld
);
1065 _slang_free(substNew
);
1068 printf("+++++++++++++ inlined asm function %s +++++++++++++\n",
1069 (char *) fun
->header
.a_name
);
1070 slang_print_tree(inlined
, 3);
1071 printf("+++++++++++++++++++++++++++++++++++++++++++++++++++\n");
1079 * Inline the given function call operation.
1080 * Return a new slang_operation that corresponds to the inlined code.
1082 static slang_operation
*
1083 slang_inline_function_call(slang_assemble_ctx
* A
, slang_function
*fun
,
1084 slang_operation
*oper
, slang_operation
*returnOper
)
1091 ParamMode
*paramMode
;
1092 const GLboolean haveRetValue
= _slang_function_has_return_value(fun
);
1093 const GLuint numArgs
= oper
->num_children
;
1094 const GLuint totalArgs
= numArgs
+ haveRetValue
;
1095 slang_operation
*args
= oper
->children
;
1096 slang_operation
*inlined
, *top
;
1097 slang_variable
**substOld
;
1098 slang_operation
**substNew
;
1099 GLuint substCount
, numCopyIn
, i
;
1100 slang_function
*prevFunction
;
1101 slang_variable_scope
*newScope
= NULL
;
1104 prevFunction
= A
->CurFunction
;
1105 A
->CurFunction
= fun
;
1107 /*assert(oper->type == SLANG_OPER_CALL); (or (matrix) multiply, etc) */
1108 assert(fun
->param_count
== totalArgs
);
1110 /* allocate temporary arrays */
1111 paramMode
= (ParamMode
*)
1112 _slang_alloc(totalArgs
* sizeof(ParamMode
));
1113 substOld
= (slang_variable
**)
1114 _slang_alloc(totalArgs
* sizeof(slang_variable
*));
1115 substNew
= (slang_operation
**)
1116 _slang_alloc(totalArgs
* sizeof(slang_operation
*));
1119 printf("\nInline call to %s (total vars=%d nparams=%d)\n",
1120 (char *) fun
->header
.a_name
,
1121 fun
->parameters
->num_variables
, numArgs
);
1124 if (haveRetValue
&& !returnOper
) {
1125 /* Create 3-child comma sequence for inlined code:
1126 * child[0]: declare __resultTmp
1127 * child[1]: inlined function body
1128 * child[2]: __resultTmp
1130 slang_operation
*commaSeq
;
1131 slang_operation
*declOper
= NULL
;
1132 slang_variable
*resultVar
;
1134 commaSeq
= slang_operation_new(1);
1135 commaSeq
->type
= SLANG_OPER_SEQUENCE
;
1136 assert(commaSeq
->locals
);
1137 commaSeq
->locals
->outer_scope
= oper
->locals
->outer_scope
;
1138 commaSeq
->num_children
= 3;
1139 commaSeq
->children
= slang_operation_new(3);
1140 /* allocate the return var */
1141 resultVar
= slang_variable_scope_grow(commaSeq
->locals
);
1143 printf("Alloc __resultTmp in scope %p for retval of calling %s\n",
1144 (void*)commaSeq->locals, (char *) fun->header.a_name);
1147 resultVar
->a_name
= slang_atom_pool_atom(A
->atoms
, "__resultTmp");
1148 resultVar
->type
= fun
->header
.type
; /* XXX copy? */
1149 resultVar
->isTemp
= GL_TRUE
;
1151 /* child[0] = __resultTmp declaration */
1152 declOper
= &commaSeq
->children
[0];
1153 declOper
->type
= SLANG_OPER_VARIABLE_DECL
;
1154 declOper
->a_id
= resultVar
->a_name
;
1155 declOper
->locals
->outer_scope
= commaSeq
->locals
;
1157 /* child[1] = function body */
1158 inlined
= &commaSeq
->children
[1];
1159 inlined
->locals
->outer_scope
= commaSeq
->locals
;
1161 /* child[2] = __resultTmp reference */
1162 returnOper
= &commaSeq
->children
[2];
1163 returnOper
->type
= SLANG_OPER_IDENTIFIER
;
1164 returnOper
->a_id
= resultVar
->a_name
;
1165 returnOper
->locals
->outer_scope
= commaSeq
->locals
;
1170 top
= inlined
= slang_operation_new(1);
1171 /* XXXX this may be inappropriate!!!! */
1172 inlined
->locals
->outer_scope
= oper
->locals
->outer_scope
;
1176 assert(inlined
->locals
);
1178 /* Examine the parameters, look for inout/out params, look for possible
1179 * substitutions, etc:
1180 * param type behaviour
1181 * in copy actual to local
1182 * const in substitute param with actual
1186 for (i
= 0; i
< totalArgs
; i
++) {
1187 slang_variable
*p
= fun
->parameters
->variables
[i
];
1189 printf("Param %d: %s %s \n", i,
1190 slang_type_qual_string(p->type.qualifier),
1191 (char *) p->a_name);
1193 if (p
->type
.qualifier
== SLANG_QUAL_INOUT
||
1194 p
->type
.qualifier
== SLANG_QUAL_OUT
) {
1195 /* an output param */
1196 slang_operation
*arg
;
1201 paramMode
[i
] = SUBST
;
1203 if (arg
->type
== SLANG_OPER_IDENTIFIER
)
1204 slang_resolve_variable(arg
);
1206 /* replace parameter 'p' with argument 'arg' */
1207 substOld
[substCount
] = p
;
1208 substNew
[substCount
] = arg
; /* will get copied */
1211 else if (p
->type
.qualifier
== SLANG_QUAL_CONST
) {
1212 /* a constant input param */
1213 if (args
[i
].type
== SLANG_OPER_IDENTIFIER
||
1214 args
[i
].type
== SLANG_OPER_LITERAL_FLOAT
) {
1215 /* replace all occurances of this parameter variable with the
1216 * actual argument variable or a literal.
1218 paramMode
[i
] = SUBST
;
1219 slang_resolve_variable(&args
[i
]);
1220 substOld
[substCount
] = p
;
1221 substNew
[substCount
] = &args
[i
]; /* will get copied */
1225 paramMode
[i
] = COPY_IN
;
1229 paramMode
[i
] = COPY_IN
;
1231 assert(paramMode
[i
]);
1234 /* actual code inlining: */
1235 slang_operation_copy(inlined
, fun
->body
);
1237 /*** XXX review this */
1238 assert(inlined
->type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
||
1239 inlined
->type
== SLANG_OPER_BLOCK_NEW_SCOPE
);
1240 inlined
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
1243 printf("======================= orig body code ======================\n");
1244 printf("=== params scope = %p\n", (void*) fun
->parameters
);
1245 slang_print_tree(fun
->body
, 8);
1246 printf("======================= copied code =========================\n");
1247 slang_print_tree(inlined
, 8);
1250 /* do parameter substitution in inlined code: */
1251 slang_substitute(A
, inlined
, substCount
, substOld
, substNew
, GL_FALSE
);
1254 printf("======================= subst code ==========================\n");
1255 slang_print_tree(inlined
, 8);
1256 printf("=============================================================\n");
1259 /* New prolog statements: (inserted before the inlined code)
1260 * Copy the 'in' arguments.
1263 for (i
= 0; i
< numArgs
; i
++) {
1264 if (paramMode
[i
] == COPY_IN
) {
1265 slang_variable
*p
= fun
->parameters
->variables
[i
];
1266 /* declare parameter 'p' */
1267 slang_operation
*decl
= slang_operation_insert(&inlined
->num_children
,
1271 decl
->type
= SLANG_OPER_VARIABLE_DECL
;
1272 assert(decl
->locals
);
1273 decl
->locals
->outer_scope
= inlined
->locals
;
1274 decl
->a_id
= p
->a_name
;
1275 decl
->num_children
= 1;
1276 decl
->children
= slang_operation_new(1);
1278 /* child[0] is the var's initializer */
1279 slang_operation_copy(&decl
->children
[0], args
+ i
);
1281 /* add parameter 'p' to the local variable scope here */
1283 slang_variable
*pCopy
= slang_variable_scope_grow(inlined
->locals
);
1284 pCopy
->type
= p
->type
;
1285 pCopy
->a_name
= p
->a_name
;
1286 pCopy
->array_len
= p
->array_len
;
1289 newScope
= inlined
->locals
;
1294 /* Now add copies of the function's local vars to the new variable scope */
1295 for (i
= totalArgs
; i
< fun
->parameters
->num_variables
; i
++) {
1296 slang_variable
*p
= fun
->parameters
->variables
[i
];
1297 slang_variable
*pCopy
= slang_variable_scope_grow(inlined
->locals
);
1298 pCopy
->type
= p
->type
;
1299 pCopy
->a_name
= p
->a_name
;
1300 pCopy
->array_len
= p
->array_len
;
1304 /* New epilog statements:
1305 * 1. Create end of function label to jump to from return statements.
1306 * 2. Copy the 'out' parameter vars
1309 slang_operation
*lab
= slang_operation_insert(&inlined
->num_children
,
1311 inlined
->num_children
);
1312 lab
->type
= SLANG_OPER_LABEL
;
1313 lab
->label
= A
->curFuncEndLabel
;
1316 for (i
= 0; i
< totalArgs
; i
++) {
1317 if (paramMode
[i
] == COPY_OUT
) {
1318 const slang_variable
*p
= fun
->parameters
->variables
[i
];
1319 /* actualCallVar = outParam */
1320 /*if (i > 0 || !haveRetValue)*/
1321 slang_operation
*ass
= slang_operation_insert(&inlined
->num_children
,
1323 inlined
->num_children
);
1324 ass
->type
= SLANG_OPER_ASSIGN
;
1325 ass
->num_children
= 2;
1326 ass
->locals
->outer_scope
= inlined
->locals
;
1327 ass
->children
= slang_operation_new(2);
1328 ass
->children
[0] = args
[i
]; /*XXX copy */
1329 ass
->children
[1].type
= SLANG_OPER_IDENTIFIER
;
1330 ass
->children
[1].a_id
= p
->a_name
;
1331 ass
->children
[1].locals
->outer_scope
= ass
->locals
;
1335 _slang_free(paramMode
);
1336 _slang_free(substOld
);
1337 _slang_free(substNew
);
1339 /* Update scoping to use the new local vars instead of the
1340 * original function's vars. This is especially important
1341 * for nested inlining.
1344 slang_replace_scope(inlined
, fun
->parameters
, newScope
);
1347 printf("Done Inline call to %s (total vars=%d nparams=%d)\n\n",
1348 (char *) fun
->header
.a_name
,
1349 fun
->parameters
->num_variables
, numArgs
);
1350 slang_print_tree(top
, 0);
1354 A
->CurFunction
= prevFunction
;
1360 static slang_ir_node
*
1361 _slang_gen_function_call(slang_assemble_ctx
*A
, slang_function
*fun
,
1362 slang_operation
*oper
, slang_operation
*dest
)
1365 slang_operation
*inlined
;
1366 slang_label
*prevFuncEndLabel
;
1369 prevFuncEndLabel
= A
->curFuncEndLabel
;
1370 sprintf(name
, "__endOfFunc_%s_", (char *) fun
->header
.a_name
);
1371 A
->curFuncEndLabel
= _slang_label_new(name
);
1372 assert(A
->curFuncEndLabel
);
1374 if (slang_is_asm_function(fun
) && !dest
) {
1375 /* assemble assembly function - tree style */
1376 inlined
= slang_inline_asm_function(A
, fun
, oper
);
1379 /* non-assembly function */
1380 /* We always generate an "inline-able" block of code here.
1382 * 1. insert the inline code
1383 * 2. Generate a call to the "inline" code as a subroutine
1387 slang_operation
*ret
= NULL
;
1389 inlined
= slang_inline_function_call(A
, fun
, oper
, dest
);
1393 ret
= _slang_find_node_type(inlined
, SLANG_OPER_RETURN
);
1395 /* check if this is a "tail" return */
1396 if (_slang_count_node_type(inlined
, SLANG_OPER_RETURN
) == 1 &&
1397 _slang_is_tail_return(inlined
)) {
1398 /* The only RETURN is the last stmt in the function, no-op it
1399 * and inline the function body.
1401 ret
->type
= SLANG_OPER_NONE
;
1404 slang_operation
*callOper
;
1405 /* The function we're calling has one or more 'return' statements.
1406 * So, we can't truly inline this function because we need to
1407 * implement 'return' with RET (and CAL).
1408 * Nevertheless, we performed "inlining" to make a new instance
1409 * of the function body to deal with static register allocation.
1411 * XXX check if there's one 'return' and if it's the very last
1412 * statement in the function - we can optimize that case.
1414 assert(inlined
->type
== SLANG_OPER_BLOCK_NEW_SCOPE
||
1415 inlined
->type
== SLANG_OPER_SEQUENCE
);
1417 if (_slang_function_has_return_value(fun
) && !dest
) {
1418 assert(inlined
->children
[0].type
== SLANG_OPER_VARIABLE_DECL
);
1419 assert(inlined
->children
[2].type
== SLANG_OPER_IDENTIFIER
);
1420 callOper
= &inlined
->children
[1];
1425 callOper
->type
= SLANG_OPER_NON_INLINED_CALL
;
1426 callOper
->fun
= fun
;
1427 callOper
->label
= _slang_label_new_unique((char*) fun
->header
.a_name
);
1435 /* Replace the function call with the inlined block (or new CALL stmt) */
1436 slang_operation_destruct(oper
);
1438 _slang_free(inlined
);
1441 assert(inlined
->locals
);
1442 printf("*** Inlined code for call to %s:\n",
1443 (char*) fun
->header
.a_name
);
1444 slang_print_tree(oper
, 10);
1448 n
= _slang_gen_operation(A
, oper
);
1450 /*_slang_label_delete(A->curFuncEndLabel);*/
1451 A
->curFuncEndLabel
= prevFuncEndLabel
;
1453 if (A
->pragmas
->Debug
) {
1455 _mesa_snprintf(s
, sizeof(s
), "Call/inline %s()", (char *) fun
->header
.a_name
);
1456 n
->Comment
= _slang_strdup(s
);
1463 static slang_asm_info
*
1464 slang_find_asm_info(const char *name
)
1467 for (i
= 0; AsmInfo
[i
].Name
; i
++) {
1468 if (_mesa_strcmp(AsmInfo
[i
].Name
, name
) == 0) {
1477 * Some write-masked assignments are simple, but others are hard.
1480 * v.xy = vec2(a, b);
1483 * v.zy = vec2(a, b);
1484 * this gets transformed/swizzled into:
1485 * v.zy = vec2(a, b).*yx* (* = don't care)
1486 * This function helps to determine simple vs. non-simple.
1489 _slang_simple_writemask(GLuint writemask
, GLuint swizzle
)
1491 switch (writemask
) {
1493 return GET_SWZ(swizzle
, 0) == SWIZZLE_X
;
1495 return GET_SWZ(swizzle
, 1) == SWIZZLE_Y
;
1497 return GET_SWZ(swizzle
, 2) == SWIZZLE_Z
;
1499 return GET_SWZ(swizzle
, 3) == SWIZZLE_W
;
1501 return (GET_SWZ(swizzle
, 0) == SWIZZLE_X
)
1502 && (GET_SWZ(swizzle
, 1) == SWIZZLE_Y
);
1504 return (GET_SWZ(swizzle
, 0) == SWIZZLE_X
)
1505 && (GET_SWZ(swizzle
, 1) == SWIZZLE_Y
)
1506 && (GET_SWZ(swizzle
, 2) == SWIZZLE_Z
);
1507 case WRITEMASK_XYZW
:
1508 return swizzle
== SWIZZLE_NOOP
;
1516 * Convert the given swizzle into a writemask. In some cases this
1517 * is trivial, in other cases, we'll need to also swizzle the right
1518 * hand side to put components in the right places.
1519 * See comment above for more info.
1520 * XXX this function could be simplified and should probably be renamed.
1521 * \param swizzle the incoming swizzle
1522 * \param writemaskOut returns the writemask
1523 * \param swizzleOut swizzle to apply to the right-hand-side
1524 * \return GL_FALSE for simple writemasks, GL_TRUE for non-simple
1527 swizzle_to_writemask(slang_assemble_ctx
*A
, GLuint swizzle
,
1528 GLuint
*writemaskOut
, GLuint
*swizzleOut
)
1530 GLuint mask
= 0x0, newSwizzle
[4];
1533 /* make new dst writemask, compute size */
1534 for (i
= 0; i
< 4; i
++) {
1535 const GLuint swz
= GET_SWZ(swizzle
, i
);
1536 if (swz
== SWIZZLE_NIL
) {
1540 assert(swz
>= 0 && swz
<= 3);
1542 if (swizzle
!= SWIZZLE_XXXX
&&
1543 swizzle
!= SWIZZLE_YYYY
&&
1544 swizzle
!= SWIZZLE_ZZZZ
&&
1545 swizzle
!= SWIZZLE_WWWW
&&
1546 (mask
& (1 << swz
))) {
1547 /* a channel can't be specified twice (ex: ".xyyz") */
1548 slang_info_log_error(A
->log
, "Invalid writemask '%s'",
1549 _mesa_swizzle_string(swizzle
, 0, 0));
1555 assert(mask
<= 0xf);
1556 size
= i
; /* number of components in mask/swizzle */
1558 *writemaskOut
= mask
;
1560 /* make new src swizzle, by inversion */
1561 for (i
= 0; i
< 4; i
++) {
1562 newSwizzle
[i
] = i
; /*identity*/
1564 for (i
= 0; i
< size
; i
++) {
1565 const GLuint swz
= GET_SWZ(swizzle
, i
);
1566 newSwizzle
[swz
] = i
;
1568 *swizzleOut
= MAKE_SWIZZLE4(newSwizzle
[0],
1573 if (_slang_simple_writemask(mask
, *swizzleOut
)) {
1575 assert(GET_SWZ(*swizzleOut
, 0) == SWIZZLE_X
);
1577 assert(GET_SWZ(*swizzleOut
, 1) == SWIZZLE_Y
);
1579 assert(GET_SWZ(*swizzleOut
, 2) == SWIZZLE_Z
);
1581 assert(GET_SWZ(*swizzleOut
, 3) == SWIZZLE_W
);
1589 #if 0 /* not used, but don't remove just yet */
1591 * Recursively traverse 'oper' to produce a swizzle mask in the event
1592 * of any vector subscripts and swizzle suffixes.
1593 * Ex: for "vec4 v", "v[2].x" resolves to v.z
1596 resolve_swizzle(const slang_operation
*oper
)
1598 if (oper
->type
== SLANG_OPER_FIELD
) {
1599 /* writemask from .xyzw suffix */
1601 if (_slang_is_swizzle((char*) oper
->a_id
, 4, &swz
)) {
1602 GLuint swizzle
= MAKE_SWIZZLE4(swz
.swizzle
[0],
1606 GLuint child_swizzle
= resolve_swizzle(&oper
->children
[0]);
1607 GLuint s
= _slang_swizzle_swizzle(child_swizzle
, swizzle
);
1611 return SWIZZLE_XYZW
;
1613 else if (oper
->type
== SLANG_OPER_SUBSCRIPT
&&
1614 oper
->children
[1].type
== SLANG_OPER_LITERAL_INT
) {
1615 /* writemask from [index] */
1616 GLuint child_swizzle
= resolve_swizzle(&oper
->children
[0]);
1617 GLuint i
= (GLuint
) oper
->children
[1].literal
[0];
1622 swizzle
= SWIZZLE_XXXX
;
1625 swizzle
= SWIZZLE_YYYY
;
1628 swizzle
= SWIZZLE_ZZZZ
;
1631 swizzle
= SWIZZLE_WWWW
;
1634 swizzle
= SWIZZLE_XYZW
;
1636 s
= _slang_swizzle_swizzle(child_swizzle
, swizzle
);
1640 return SWIZZLE_XYZW
;
1648 * Recursively descend through swizzle nodes to find the node's storage info.
1650 static slang_ir_storage
*
1651 get_store(const slang_ir_node
*n
)
1653 if (n
->Opcode
== IR_SWIZZLE
) {
1654 return get_store(n
->Children
[0]);
1662 * Generate IR tree for an asm instruction/operation such as:
1663 * __asm vec4_dot __retVal.x, v1, v2;
1665 static slang_ir_node
*
1666 _slang_gen_asm(slang_assemble_ctx
*A
, slang_operation
*oper
,
1667 slang_operation
*dest
)
1669 const slang_asm_info
*info
;
1670 slang_ir_node
*kids
[3], *n
;
1671 GLuint j
, firstOperand
;
1673 assert(oper
->type
== SLANG_OPER_ASM
);
1675 info
= slang_find_asm_info((char *) oper
->a_id
);
1677 _mesa_problem(NULL
, "undefined __asm function %s\n",
1678 (char *) oper
->a_id
);
1681 assert(info
->NumParams
<= 3);
1683 if (info
->NumParams
== oper
->num_children
) {
1684 /* Storage for result is not specified.
1685 * Children[0], [1], [2] are the operands.
1690 /* Storage for result (child[0]) is specified.
1691 * Children[1], [2], [3] are the operands.
1696 /* assemble child(ren) */
1697 kids
[0] = kids
[1] = kids
[2] = NULL
;
1698 for (j
= 0; j
< info
->NumParams
; j
++) {
1699 kids
[j
] = _slang_gen_operation(A
, &oper
->children
[firstOperand
+ j
]);
1704 n
= new_node3(info
->Opcode
, kids
[0], kids
[1], kids
[2]);
1707 /* Setup n->Store to be a particular location. Otherwise, storage
1708 * for the result (a temporary) will be allocated later.
1710 slang_operation
*dest_oper
;
1713 dest_oper
= &oper
->children
[0];
1715 n0
= _slang_gen_operation(A
, dest_oper
);
1720 n
->Store
= n0
->Store
;
1722 assert(n
->Store
->File
!= PROGRAM_UNDEFINED
|| n
->Store
->Parent
);
1733 print_funcs(struct slang_function_scope_
*scope
, const char *name
)
1736 for (i
= 0; i
< scope
->num_functions
; i
++) {
1737 slang_function
*f
= &scope
->functions
[i
];
1738 if (!name
|| strcmp(name
, (char*) f
->header
.a_name
) == 0)
1739 printf(" %s (%d args)\n", name
, f
->param_count
);
1742 if (scope
->outer_scope
)
1743 print_funcs(scope
->outer_scope
, name
);
1749 * Find a function of the given name, taking 'numArgs' arguments.
1750 * This is the function we'll try to call when there is no exact match
1751 * between function parameters and call arguments.
1753 * XXX we should really create a list of candidate functions and try
1756 static slang_function
*
1757 _slang_find_function_by_argc(slang_function_scope
*scope
,
1758 const char *name
, int numArgs
)
1762 for (i
= 0; i
< scope
->num_functions
; i
++) {
1763 slang_function
*f
= &scope
->functions
[i
];
1764 if (strcmp(name
, (char*) f
->header
.a_name
) == 0) {
1765 int haveRetValue
= _slang_function_has_return_value(f
);
1766 if (numArgs
== f
->param_count
- haveRetValue
)
1770 scope
= scope
->outer_scope
;
1777 static slang_function
*
1778 _slang_find_function_by_max_argc(slang_function_scope
*scope
,
1781 slang_function
*maxFunc
= NULL
;
1786 for (i
= 0; i
< scope
->num_functions
; i
++) {
1787 slang_function
*f
= &scope
->functions
[i
];
1788 if (strcmp(name
, (char*) f
->header
.a_name
) == 0) {
1789 if (f
->param_count
> maxArgs
) {
1790 maxArgs
= f
->param_count
;
1795 scope
= scope
->outer_scope
;
1803 * Generate a new slang_function which is a constructor for a user-defined
1806 static slang_function
*
1807 _slang_make_struct_constructor(slang_assemble_ctx
*A
, slang_struct
*str
)
1809 const GLint numFields
= str
->fields
->num_variables
;
1810 slang_function
*fun
= slang_function_new(SLANG_FUNC_CONSTRUCTOR
);
1812 /* function header (name, return type) */
1813 fun
->header
.a_name
= str
->a_name
;
1814 fun
->header
.type
.qualifier
= SLANG_QUAL_NONE
;
1815 fun
->header
.type
.specifier
.type
= SLANG_SPEC_STRUCT
;
1816 fun
->header
.type
.specifier
._struct
= str
;
1818 /* function parameters (= struct's fields) */
1821 for (i
= 0; i
< numFields
; i
++) {
1823 printf("Field %d: %s\n", i, (char*) str->fields->variables[i]->a_name);
1825 slang_variable
*p
= slang_variable_scope_grow(fun
->parameters
);
1826 *p
= *str
->fields
->variables
[i
]; /* copy the variable and type */
1827 p
->type
.qualifier
= SLANG_QUAL_CONST
;
1829 fun
->param_count
= fun
->parameters
->num_variables
;
1832 /* Add __retVal to params */
1834 slang_variable
*p
= slang_variable_scope_grow(fun
->parameters
);
1835 slang_atom a_retVal
= slang_atom_pool_atom(A
->atoms
, "__retVal");
1837 p
->a_name
= a_retVal
;
1838 p
->type
= fun
->header
.type
;
1839 p
->type
.qualifier
= SLANG_QUAL_OUT
;
1843 /* function body is:
1853 slang_variable_scope
*scope
;
1854 slang_variable
*var
;
1857 fun
->body
= slang_operation_new(1);
1858 fun
->body
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
1859 fun
->body
->num_children
= numFields
+ 2;
1860 fun
->body
->children
= slang_operation_new(numFields
+ 2);
1862 scope
= fun
->body
->locals
;
1863 scope
->outer_scope
= fun
->parameters
;
1865 /* create local var 't' */
1866 var
= slang_variable_scope_grow(scope
);
1867 var
->a_name
= slang_atom_pool_atom(A
->atoms
, "t");
1868 var
->type
= fun
->header
.type
;
1872 slang_operation
*decl
;
1874 decl
= &fun
->body
->children
[0];
1875 decl
->type
= SLANG_OPER_VARIABLE_DECL
;
1876 decl
->locals
= _slang_variable_scope_new(scope
);
1877 decl
->a_id
= var
->a_name
;
1880 /* assign params to fields of t */
1881 for (i
= 0; i
< numFields
; i
++) {
1882 slang_operation
*assign
= &fun
->body
->children
[1 + i
];
1884 assign
->type
= SLANG_OPER_ASSIGN
;
1885 assign
->locals
= _slang_variable_scope_new(scope
);
1886 assign
->num_children
= 2;
1887 assign
->children
= slang_operation_new(2);
1890 slang_operation
*lhs
= &assign
->children
[0];
1892 lhs
->type
= SLANG_OPER_FIELD
;
1893 lhs
->locals
= _slang_variable_scope_new(scope
);
1894 lhs
->num_children
= 1;
1895 lhs
->children
= slang_operation_new(1);
1896 lhs
->a_id
= str
->fields
->variables
[i
]->a_name
;
1898 lhs
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
1899 lhs
->children
[0].a_id
= var
->a_name
;
1900 lhs
->children
[0].locals
= _slang_variable_scope_new(scope
);
1903 lhs
->children
[1].num_children
= 1;
1904 lhs
->children
[1].children
= slang_operation_new(1);
1905 lhs
->children
[1].children
[0].type
= SLANG_OPER_IDENTIFIER
;
1906 lhs
->children
[1].children
[0].a_id
= str
->fields
->variables
[i
]->a_name
;
1907 lhs
->children
[1].children
->locals
= _slang_variable_scope_new(scope
);
1912 slang_operation
*rhs
= &assign
->children
[1];
1914 rhs
->type
= SLANG_OPER_IDENTIFIER
;
1915 rhs
->locals
= _slang_variable_scope_new(scope
);
1916 rhs
->a_id
= str
->fields
->variables
[i
]->a_name
;
1922 slang_operation
*ret
= &fun
->body
->children
[numFields
+ 1];
1924 ret
->type
= SLANG_OPER_RETURN
;
1925 ret
->locals
= _slang_variable_scope_new(scope
);
1926 ret
->num_children
= 1;
1927 ret
->children
= slang_operation_new(1);
1928 ret
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
1929 ret
->children
[0].a_id
= var
->a_name
;
1930 ret
->children
[0].locals
= _slang_variable_scope_new(scope
);
1934 slang_print_function(fun, 1);
1941 * Find/create a function (constructor) for the given structure name.
1943 static slang_function
*
1944 _slang_locate_struct_constructor(slang_assemble_ctx
*A
, const char *name
)
1947 for (i
= 0; i
< A
->space
.structs
->num_structs
; i
++) {
1948 slang_struct
*str
= &A
->space
.structs
->structs
[i
];
1949 if (strcmp(name
, (const char *) str
->a_name
) == 0) {
1950 /* found a structure type that matches the function name */
1951 if (!str
->constructor
) {
1952 /* create the constructor function now */
1953 str
->constructor
= _slang_make_struct_constructor(A
, str
);
1955 return str
->constructor
;
1963 * Generate a new slang_function to satisfy a call to an array constructor.
1964 * Ex: float[3](1., 2., 3.)
1966 static slang_function
*
1967 _slang_make_array_constructor(slang_assemble_ctx
*A
, slang_operation
*oper
)
1969 slang_type_specifier_type baseType
;
1970 slang_function
*fun
;
1973 fun
= slang_function_new(SLANG_FUNC_CONSTRUCTOR
);
1977 baseType
= slang_type_specifier_type_from_string((char *) oper
->a_id
);
1979 num_elements
= oper
->num_children
;
1981 /* function header, return type */
1983 fun
->header
.a_name
= oper
->a_id
;
1984 fun
->header
.type
.qualifier
= SLANG_QUAL_NONE
;
1985 fun
->header
.type
.specifier
.type
= SLANG_SPEC_ARRAY
;
1986 fun
->header
.type
.specifier
._array
=
1987 slang_type_specifier_new(baseType
, NULL
, NULL
);
1988 fun
->header
.type
.array_len
= num_elements
;
1991 /* function parameters (= number of elements) */
1994 for (i
= 0; i
< num_elements
; i
++) {
1996 printf("Field %d: %s\n", i, (char*) str->fields->variables[i]->a_name);
1998 slang_variable
*p
= slang_variable_scope_grow(fun
->parameters
);
2000 _mesa_snprintf(name
, sizeof(name
), "p%d", i
);
2001 p
->a_name
= slang_atom_pool_atom(A
->atoms
, name
);
2002 p
->type
.qualifier
= SLANG_QUAL_CONST
;
2003 p
->type
.specifier
.type
= baseType
;
2005 fun
->param_count
= fun
->parameters
->num_variables
;
2008 /* Add __retVal to params */
2010 slang_variable
*p
= slang_variable_scope_grow(fun
->parameters
);
2011 slang_atom a_retVal
= slang_atom_pool_atom(A
->atoms
, "__retVal");
2013 p
->a_name
= a_retVal
;
2014 p
->type
= fun
->header
.type
;
2015 p
->type
.qualifier
= SLANG_QUAL_OUT
;
2016 p
->type
.specifier
.type
= baseType
;
2020 /* function body is:
2030 slang_variable_scope
*scope
;
2031 slang_variable
*var
;
2034 fun
->body
= slang_operation_new(1);
2035 fun
->body
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
2036 fun
->body
->num_children
= num_elements
+ 2;
2037 fun
->body
->children
= slang_operation_new(num_elements
+ 2);
2039 scope
= fun
->body
->locals
;
2040 scope
->outer_scope
= fun
->parameters
;
2042 /* create local var 't' */
2043 var
= slang_variable_scope_grow(scope
);
2044 var
->a_name
= slang_atom_pool_atom(A
->atoms
, "ttt");
2045 var
->type
= fun
->header
.type
;/*XXX copy*/
2049 slang_operation
*decl
;
2051 decl
= &fun
->body
->children
[0];
2052 decl
->type
= SLANG_OPER_VARIABLE_DECL
;
2053 decl
->locals
= _slang_variable_scope_new(scope
);
2054 decl
->a_id
= var
->a_name
;
2057 /* assign params to elements of t */
2058 for (i
= 0; i
< num_elements
; i
++) {
2059 slang_operation
*assign
= &fun
->body
->children
[1 + i
];
2061 assign
->type
= SLANG_OPER_ASSIGN
;
2062 assign
->locals
= _slang_variable_scope_new(scope
);
2063 assign
->num_children
= 2;
2064 assign
->children
= slang_operation_new(2);
2067 slang_operation
*lhs
= &assign
->children
[0];
2069 lhs
->type
= SLANG_OPER_SUBSCRIPT
;
2070 lhs
->locals
= _slang_variable_scope_new(scope
);
2071 lhs
->num_children
= 2;
2072 lhs
->children
= slang_operation_new(2);
2074 lhs
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
2075 lhs
->children
[0].a_id
= var
->a_name
;
2076 lhs
->children
[0].locals
= _slang_variable_scope_new(scope
);
2078 lhs
->children
[1].type
= SLANG_OPER_LITERAL_INT
;
2079 lhs
->children
[1].literal
[0] = (GLfloat
) i
;
2083 slang_operation
*rhs
= &assign
->children
[1];
2085 rhs
->type
= SLANG_OPER_IDENTIFIER
;
2086 rhs
->locals
= _slang_variable_scope_new(scope
);
2087 rhs
->a_id
= fun
->parameters
->variables
[i
]->a_name
;
2093 slang_operation
*ret
= &fun
->body
->children
[num_elements
+ 1];
2095 ret
->type
= SLANG_OPER_RETURN
;
2096 ret
->locals
= _slang_variable_scope_new(scope
);
2097 ret
->num_children
= 1;
2098 ret
->children
= slang_operation_new(1);
2099 ret
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
2100 ret
->children
[0].a_id
= var
->a_name
;
2101 ret
->children
[0].locals
= _slang_variable_scope_new(scope
);
2106 slang_print_function(fun, 1);
2114 _slang_is_vec_mat_type(const char *name
)
2116 static const char *vecmat_types
[] = {
2117 "float", "int", "bool",
2118 "vec2", "vec3", "vec4",
2119 "ivec2", "ivec3", "ivec4",
2120 "bvec2", "bvec3", "bvec4",
2121 "mat2", "mat3", "mat4",
2122 "mat2x3", "mat2x4", "mat3x2", "mat3x4", "mat4x2", "mat4x3",
2126 for (i
= 0; vecmat_types
[i
]; i
++)
2127 if (_mesa_strcmp(name
, vecmat_types
[i
]) == 0)
2134 * Assemble a function call, given a particular function name.
2135 * \param name the function's name (operators like '*' are possible).
2137 static slang_ir_node
*
2138 _slang_gen_function_call_name(slang_assemble_ctx
*A
, const char *name
,
2139 slang_operation
*oper
, slang_operation
*dest
)
2141 slang_operation
*params
= oper
->children
;
2142 const GLuint param_count
= oper
->num_children
;
2144 slang_function
*fun
;
2147 atom
= slang_atom_pool_atom(A
->atoms
, name
);
2148 if (atom
== SLANG_ATOM_NULL
)
2151 if (oper
->array_constructor
) {
2152 /* this needs special handling */
2153 fun
= _slang_make_array_constructor(A
, oper
);
2156 /* Try to find function by name and exact argument type matching */
2157 GLboolean error
= GL_FALSE
;
2158 fun
= _slang_function_locate(A
->space
.funcs
, atom
, params
, param_count
,
2159 &A
->space
, A
->atoms
, A
->log
, &error
);
2161 slang_info_log_error(A
->log
,
2162 "Function '%s' not found (check argument types)",
2169 /* Next, try locating a constructor function for a user-defined type */
2170 fun
= _slang_locate_struct_constructor(A
, name
);
2174 * At this point, some heuristics are used to try to find a function
2175 * that matches the calling signature by means of casting or "unrolling"
2179 if (!fun
&& _slang_is_vec_mat_type(name
)) {
2180 /* Next, if this call looks like a vec() or mat() constructor call,
2181 * try "unwinding" the args to satisfy a constructor.
2183 fun
= _slang_find_function_by_max_argc(A
->space
.funcs
, name
);
2185 if (!_slang_adapt_call(oper
, fun
, &A
->space
, A
->atoms
, A
->log
)) {
2186 slang_info_log_error(A
->log
,
2187 "Function '%s' not found (check argument types)",
2194 if (!fun
&& _slang_is_vec_mat_type(name
)) {
2195 /* Next, try casting args to the types of the formal parameters */
2196 int numArgs
= oper
->num_children
;
2197 fun
= _slang_find_function_by_argc(A
->space
.funcs
, name
, numArgs
);
2198 if (!fun
|| !_slang_cast_func_params(oper
, fun
, &A
->space
, A
->atoms
, A
->log
)) {
2199 slang_info_log_error(A
->log
,
2200 "Function '%s' not found (check argument types)",
2208 slang_info_log_error(A
->log
,
2209 "Function '%s' not found (check argument types)",
2215 /* The function body may be in another compilation unit.
2216 * We'll try concatenating the shaders and recompile at link time.
2218 A
->UnresolvedRefs
= GL_TRUE
;
2219 return new_node1(IR_NOP
, NULL
);
2222 /* type checking to be sure function's return type matches 'dest' type */
2226 slang_typeinfo_construct(&t0
);
2227 typeof_operation(A
, dest
, &t0
);
2229 if (!slang_type_specifier_equal(&t0
.spec
, &fun
->header
.type
.specifier
)) {
2230 slang_info_log_error(A
->log
,
2231 "Incompatible type returned by call to '%s'",
2237 n
= _slang_gen_function_call(A
, fun
, oper
, dest
);
2239 if (n
&& !n
->Store
&& !dest
2240 && fun
->header
.type
.specifier
.type
!= SLANG_SPEC_VOID
) {
2241 /* setup n->Store for the result of the function call */
2242 GLint size
= _slang_sizeof_type_specifier(&fun
->header
.type
.specifier
);
2243 n
->Store
= _slang_new_ir_storage(PROGRAM_TEMPORARY
, -1, size
);
2244 /*printf("Alloc storage for function result, size %d \n", size);*/
2247 if (oper
->array_constructor
) {
2248 /* free the temporary array constructor function now */
2249 slang_function_destruct(fun
);
2256 static slang_ir_node
*
2257 _slang_gen_method_call(slang_assemble_ctx
*A
, slang_operation
*oper
)
2259 slang_atom
*a_length
= slang_atom_pool_atom(A
->atoms
, "length");
2261 slang_variable
*var
;
2263 /* NOTE: In GLSL 1.20, there's only one kind of method
2264 * call: array.length(). Anything else is an error.
2266 if (oper
->a_id
!= a_length
) {
2267 slang_info_log_error(A
->log
,
2268 "Undefined method call '%s'", (char *) oper
->a_id
);
2272 /* length() takes no arguments */
2273 if (oper
->num_children
> 0) {
2274 slang_info_log_error(A
->log
, "Invalid arguments to length() method");
2278 /* lookup the object/variable */
2279 var
= _slang_variable_locate(oper
->locals
, oper
->a_obj
, GL_TRUE
);
2280 if (!var
|| var
->type
.specifier
.type
!= SLANG_SPEC_ARRAY
) {
2281 slang_info_log_error(A
->log
,
2282 "Undefined object '%s'", (char *) oper
->a_obj
);
2286 /* Create a float/literal IR node encoding the array length */
2287 n
= new_node0(IR_FLOAT
);
2289 n
->Value
[0] = (float) _slang_array_length(var
);
2290 n
->Store
= _slang_new_ir_storage(PROGRAM_CONSTANT
, -1, 1);
2297 _slang_is_constant_cond(const slang_operation
*oper
, GLboolean
*value
)
2299 if (oper
->type
== SLANG_OPER_LITERAL_FLOAT
||
2300 oper
->type
== SLANG_OPER_LITERAL_INT
||
2301 oper
->type
== SLANG_OPER_LITERAL_BOOL
) {
2302 if (oper
->literal
[0])
2308 else if (oper
->type
== SLANG_OPER_EXPRESSION
&&
2309 oper
->num_children
== 1) {
2310 return _slang_is_constant_cond(&oper
->children
[0], value
);
2317 * Test if an operation is a scalar or boolean.
2320 _slang_is_scalar_or_boolean(slang_assemble_ctx
*A
, slang_operation
*oper
)
2322 slang_typeinfo type
;
2325 slang_typeinfo_construct(&type
);
2326 typeof_operation(A
, oper
, &type
);
2327 size
= _slang_sizeof_type_specifier(&type
.spec
);
2328 slang_typeinfo_destruct(&type
);
2334 * Test if an operation is boolean.
2337 _slang_is_boolean(slang_assemble_ctx
*A
, slang_operation
*oper
)
2339 slang_typeinfo type
;
2342 slang_typeinfo_construct(&type
);
2343 typeof_operation(A
, oper
, &type
);
2344 isBool
= (type
.spec
.type
== SLANG_SPEC_BOOL
);
2345 slang_typeinfo_destruct(&type
);
2351 * Check if a loop contains a 'continue' statement.
2352 * Stop looking if we find a nested loop.
2355 _slang_loop_contains_continue(const slang_operation
*oper
)
2357 switch (oper
->type
) {
2358 case SLANG_OPER_CONTINUE
:
2360 case SLANG_OPER_FOR
:
2362 case SLANG_OPER_WHILE
:
2363 /* stop upon finding a nested loop */
2369 for (i
= 0; i
< oper
->num_children
; i
++) {
2370 if (_slang_loop_contains_continue(slang_oper_child((slang_operation
*) oper
, i
)))
2379 static slang_ir_node
*
2380 _slang_gen_while_without_continue(slang_assemble_ctx
*A
, slang_operation
*oper
)
2383 slang_operation
*top
;
2384 slang_operation
*innerBody
;
2386 assert(oper
->type
== SLANG_OPER_DO
);
2388 top
= slang_operation_new(1);
2389 top
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
2390 top
->locals
->outer_scope
= oper
->locals
->outer_scope
;
2391 slang_operation_add_children(top
, 2);
2393 /* declare: bool _notBreakFlag = true */
2395 slang_operation
*condDecl
= slang_oper_child(top
, 0);
2396 slang_variable
*var
;
2398 condDecl
->type
= SLANG_OPER_VARIABLE_DECL
;
2399 var
= slang_variable_scope_grow(top
->locals
);
2400 slang_fully_specified_type_construct(&var
->type
);
2401 var
->type
.specifier
.type
= SLANG_SPEC_BOOL
;
2402 var
->a_name
= slang_atom_pool_atom(A
->atoms
, "_notBreakFlag");
2403 condDecl
->a_id
= var
->a_name
;
2404 var
->initializer
= slang_operation_new(1);
2405 slang_operation_literal_bool(var
->initializer
, GL_TRUE
);
2408 /* build outer do-loop: do { ... } while (_notBreakFlag && LOOPCOND) */
2410 slang_operation
*outerDo
= slang_oper_child(top
, 1);
2411 outerDo
->type
= SLANG_OPER_DO
;
2412 slang_operation_add_children(outerDo
, 2);
2416 slang_operation
*innerDo
= slang_oper_child(outerDo
, 0);
2417 innerDo
->type
= SLANG_OPER_DO
;
2418 slang_operation_add_children(innerDo
, 2);
2420 /* copy original do-loop body into inner do-loop's body */
2421 innerBody
= slang_oper_child(innerDo
, 0);
2422 slang_operation_copy(innerBody
, slang_oper_child(oper
, 0));
2423 innerBody
->locals
->outer_scope
= innerDo
->locals
;
2425 /* inner do-loop's condition is constant/false */
2427 slang_operation
*constFalse
= slang_oper_child(innerDo
, 1);
2428 slang_operation_literal_bool(constFalse
, GL_FALSE
);
2432 /* _notBreakFlag && LOOPCOND */
2434 slang_operation
*cond
= slang_oper_child(outerDo
, 1);
2435 cond
->type
= SLANG_OPER_LOGICALAND
;
2436 slang_operation_add_children(cond
, 2);
2438 slang_operation
*notBreak
= slang_oper_child(cond
, 0);
2439 slang_operation_identifier(notBreak
, A
, "_notBreakFlag");
2442 slang_operation
*origCond
= slang_oper_child(cond
, 1);
2443 slang_operation_copy(origCond
, slang_oper_child(oper
, 1));
2448 /* Finally, in innerBody,
2449 * replace "break" with "_notBreakFlag = 0; break"
2450 * replace "continue" with "break"
2452 replace_break_and_cont(A
, innerBody
);
2454 slang_print_tree(top
, 0);
2456 return _slang_gen_operation(A
, top
);
2463 * Generate loop code using high-level IR_LOOP instruction
2465 static slang_ir_node
*
2466 _slang_gen_while(slang_assemble_ctx
* A
, slang_operation
*oper
)
2470 * BREAK if !expr (child[0])
2471 * body code (child[1])
2473 slang_ir_node
*prevLoop
, *loop
, *breakIf
, *body
;
2474 GLboolean isConst
, constTrue
;
2476 if (!A
->EmitContReturn
) {
2477 /* We don't want to emit CONT instructions. If this while-loop has
2478 * a continue, translate it away.
2480 if (_slang_loop_contains_continue(slang_oper_child(oper
, 1))) {
2481 return _slang_gen_while_without_continue(A
, oper
);
2485 /* type-check expression */
2486 if (!_slang_is_boolean(A
, &oper
->children
[0])) {
2487 slang_info_log_error(A
->log
, "scalar/boolean expression expected for 'while'");
2491 /* Check if loop condition is a constant */
2492 isConst
= _slang_is_constant_cond(&oper
->children
[0], &constTrue
);
2494 if (isConst
&& !constTrue
) {
2495 /* loop is never executed! */
2496 return new_node0(IR_NOP
);
2499 loop
= new_loop(NULL
);
2501 /* save old, push new loop */
2502 prevLoop
= A
->CurLoop
;
2505 if (isConst
&& constTrue
) {
2506 /* while(nonzero constant), no conditional break */
2511 = new_cond(new_not(_slang_gen_operation(A
, &oper
->children
[0])));
2512 breakIf
= new_break_if_true(A
->CurLoop
, cond
);
2514 body
= _slang_gen_operation(A
, &oper
->children
[1]);
2515 loop
->Children
[0] = new_seq(breakIf
, body
);
2517 /* Do infinite loop detection */
2518 /* loop->List is head of linked list of break/continue nodes */
2519 if (!loop
->List
&& isConst
&& constTrue
) {
2520 /* infinite loop detected */
2521 A
->CurLoop
= prevLoop
; /* clean-up */
2522 slang_info_log_error(A
->log
, "Infinite loop detected!");
2526 /* pop loop, restore prev */
2527 A
->CurLoop
= prevLoop
;
2534 * Replace 'break' and 'continue' statements inside a do-while loop.
2535 * This is a recursive helper function used by _slang_gen_do_without_continue().
2538 replace_break_and_cont(slang_assemble_ctx
*A
, slang_operation
*oper
)
2540 switch (oper
->type
) {
2541 case SLANG_OPER_BREAK
:
2542 /* replace 'break' with "_notBreakFlag = false; break" */
2544 slang_operation
*block
= oper
;
2545 block
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
2546 slang_operation_add_children(block
, 2);
2548 slang_operation
*assign
= slang_oper_child(block
, 0);
2549 assign
->type
= SLANG_OPER_ASSIGN
;
2550 slang_operation_add_children(assign
, 2);
2552 slang_operation
*lhs
= slang_oper_child(assign
, 0);
2553 slang_operation_identifier(lhs
, A
, "_notBreakFlag");
2556 slang_operation
*rhs
= slang_oper_child(assign
, 1);
2557 slang_operation_literal_bool(rhs
, GL_FALSE
);
2561 slang_operation
*brk
= slang_oper_child(block
, 1);
2562 brk
->type
= SLANG_OPER_BREAK
;
2563 assert(!brk
->children
);
2567 case SLANG_OPER_CONTINUE
:
2568 /* convert continue into a break */
2569 oper
->type
= SLANG_OPER_BREAK
;
2571 case SLANG_OPER_FOR
:
2573 case SLANG_OPER_WHILE
:
2574 /* stop upon finding a nested loop */
2580 for (i
= 0; i
< oper
->num_children
; i
++) {
2581 replace_break_and_cont(A
, slang_oper_child(oper
, i
));
2589 * Transform a do-while-loop so that continue statements are converted to breaks.
2590 * Then do normal IR code generation.
2601 * } while (LOOPCOND);
2606 * bool _notBreakFlag = 1;
2611 * break; // was continue
2614 * _notBreakFlag = 0; // was
2618 * } while (_notBreakFlag && LOOPCOND);
2621 static slang_ir_node
*
2622 _slang_gen_do_without_continue(slang_assemble_ctx
*A
, slang_operation
*oper
)
2624 slang_operation
*top
;
2625 slang_operation
*innerBody
;
2627 assert(oper
->type
== SLANG_OPER_DO
);
2629 top
= slang_operation_new(1);
2630 top
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
2631 top
->locals
->outer_scope
= oper
->locals
->outer_scope
;
2632 slang_operation_add_children(top
, 2);
2634 /* declare: bool _notBreakFlag = true */
2636 slang_operation
*condDecl
= slang_oper_child(top
, 0);
2637 slang_variable
*var
;
2639 condDecl
->type
= SLANG_OPER_VARIABLE_DECL
;
2640 var
= slang_variable_scope_grow(top
->locals
);
2641 slang_fully_specified_type_construct(&var
->type
);
2642 var
->type
.specifier
.type
= SLANG_SPEC_BOOL
;
2643 var
->a_name
= slang_atom_pool_atom(A
->atoms
, "_notBreakFlag");
2644 condDecl
->a_id
= var
->a_name
;
2645 var
->initializer
= slang_operation_new(1);
2646 slang_operation_literal_bool(var
->initializer
, GL_TRUE
);
2649 /* build outer do-loop: do { ... } while (_notBreakFlag && LOOPCOND) */
2651 slang_operation
*outerDo
= slang_oper_child(top
, 1);
2652 outerDo
->type
= SLANG_OPER_DO
;
2653 slang_operation_add_children(outerDo
, 2);
2657 slang_operation
*innerDo
= slang_oper_child(outerDo
, 0);
2658 innerDo
->type
= SLANG_OPER_DO
;
2659 slang_operation_add_children(innerDo
, 2);
2661 /* copy original do-loop body into inner do-loop's body */
2662 innerBody
= slang_oper_child(innerDo
, 0);
2663 slang_operation_copy(innerBody
, slang_oper_child(oper
, 0));
2664 innerBody
->locals
->outer_scope
= innerDo
->locals
;
2666 /* inner do-loop's condition is constant/false */
2668 slang_operation
*constFalse
= slang_oper_child(innerDo
, 1);
2669 slang_operation_literal_bool(constFalse
, GL_FALSE
);
2673 /* _notBreakFlag && LOOPCOND */
2675 slang_operation
*cond
= slang_oper_child(outerDo
, 1);
2676 cond
->type
= SLANG_OPER_LOGICALAND
;
2677 slang_operation_add_children(cond
, 2);
2679 slang_operation
*notBreak
= slang_oper_child(cond
, 0);
2680 slang_operation_identifier(notBreak
, A
, "_notBreakFlag");
2683 slang_operation
*origCond
= slang_oper_child(cond
, 1);
2684 slang_operation_copy(origCond
, slang_oper_child(oper
, 1));
2689 /* Finally, in innerBody,
2690 * replace "break" with "_notBreakFlag = 0; break"
2691 * replace "continue" with "break"
2693 replace_break_and_cont(A
, innerBody
);
2695 slang_print_tree(top
, 0);
2697 return _slang_gen_operation(A
, top
);
2702 * Generate IR tree for a do-while loop using high-level LOOP, IF instructions.
2704 static slang_ir_node
*
2705 _slang_gen_do(slang_assemble_ctx
* A
, slang_operation
*oper
)
2709 * body code (child[0])
2711 * BREAK if !expr (child[1])
2713 slang_ir_node
*prevLoop
, *loop
;
2714 GLboolean isConst
, constTrue
;
2716 if (!A
->EmitContReturn
) {
2717 /* We don't want to emit CONT instructions. If this do-loop has
2718 * a continue, translate it away.
2720 if (_slang_loop_contains_continue(slang_oper_child(oper
, 0))) {
2721 return _slang_gen_do_without_continue(A
, oper
);
2725 /* type-check expression */
2726 if (!_slang_is_boolean(A
, &oper
->children
[1])) {
2727 slang_info_log_error(A
->log
, "scalar/boolean expression expected for 'do/while'");
2731 loop
= new_loop(NULL
);
2733 /* save old, push new loop */
2734 prevLoop
= A
->CurLoop
;
2738 loop
->Children
[0] = _slang_gen_operation(A
, &oper
->children
[0]);
2740 /* Check if loop condition is a constant */
2741 isConst
= _slang_is_constant_cond(&oper
->children
[1], &constTrue
);
2742 if (isConst
&& constTrue
) {
2743 /* do { } while(1) ==> no conditional break */
2744 loop
->Children
[1] = NULL
; /* no tail code */
2748 = new_cond(new_not(_slang_gen_operation(A
, &oper
->children
[1])));
2749 loop
->Children
[1] = new_break_if_true(A
->CurLoop
, cond
);
2752 /* XXX we should do infinite loop detection, as above */
2754 /* pop loop, restore prev */
2755 A
->CurLoop
= prevLoop
;
2762 * Recursively count the number of operations rooted at 'oper'.
2763 * This gives some kind of indication of the size/complexity of an operation.
2766 sizeof_operation(const slang_operation
*oper
)
2769 GLuint count
= 1; /* me */
2771 for (i
= 0; i
< oper
->num_children
; i
++) {
2772 count
+= sizeof_operation(&oper
->children
[i
]);
2783 * Determine if a for-loop can be unrolled.
2784 * At this time, only a rather narrow class of for loops can be unrolled.
2785 * See code for details.
2786 * When a loop can't be unrolled because it's too large we'll emit a
2787 * message to the log.
2790 _slang_can_unroll_for_loop(slang_assemble_ctx
* A
, const slang_operation
*oper
)
2794 const char *varName
;
2797 if (oper
->type
!= SLANG_OPER_FOR
)
2800 assert(oper
->num_children
== 4);
2802 if (_slang_find_node_type((slang_operation
*) oper
, SLANG_OPER_CONTINUE
) ||
2803 _slang_find_node_type((slang_operation
*) oper
, SLANG_OPER_BREAK
)) {
2804 /* dont't unroll loops containing continue/break statements */
2808 /* children[0] must be either "int i=constant" or "i=constant" */
2809 if (oper
->children
[0].type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
) {
2810 slang_variable
*var
;
2812 if (oper
->children
[0].children
[0].type
!= SLANG_OPER_VARIABLE_DECL
)
2815 varId
= oper
->children
[0].children
[0].a_id
;
2817 var
= _slang_variable_locate(oper
->children
[0].children
[0].locals
,
2821 if (!var
->initializer
)
2823 if (var
->initializer
->type
!= SLANG_OPER_LITERAL_INT
)
2825 start
= (GLint
) var
->initializer
->literal
[0];
2827 else if (oper
->children
[0].type
== SLANG_OPER_EXPRESSION
) {
2828 if (oper
->children
[0].children
[0].type
!= SLANG_OPER_ASSIGN
)
2830 if (oper
->children
[0].children
[0].children
[0].type
!= SLANG_OPER_IDENTIFIER
)
2832 if (oper
->children
[0].children
[0].children
[1].type
!= SLANG_OPER_LITERAL_INT
)
2835 varId
= oper
->children
[0].children
[0].children
[0].a_id
;
2837 start
= (GLint
) oper
->children
[0].children
[0].children
[1].literal
[0];
2843 /* children[1] must be "i<constant" */
2844 if (oper
->children
[1].type
!= SLANG_OPER_EXPRESSION
)
2846 if (oper
->children
[1].children
[0].type
!= SLANG_OPER_LESS
)
2848 if (oper
->children
[1].children
[0].children
[0].type
!= SLANG_OPER_IDENTIFIER
)
2850 if (oper
->children
[1].children
[0].children
[1].type
!= SLANG_OPER_LITERAL_INT
)
2853 end
= (GLint
) oper
->children
[1].children
[0].children
[1].literal
[0];
2855 /* children[2] must be "i++" or "++i" */
2856 if (oper
->children
[2].type
!= SLANG_OPER_POSTINCREMENT
&&
2857 oper
->children
[2].type
!= SLANG_OPER_PREINCREMENT
)
2859 if (oper
->children
[2].children
[0].type
!= SLANG_OPER_IDENTIFIER
)
2862 /* make sure the same variable name is used in all places */
2863 if ((oper
->children
[1].children
[0].children
[0].a_id
!= varId
) ||
2864 (oper
->children
[2].children
[0].a_id
!= varId
))
2867 varName
= (const char *) varId
;
2869 /* children[3], the loop body, can't be too large */
2870 bodySize
= sizeof_operation(&oper
->children
[3]);
2871 if (bodySize
> MAX_FOR_LOOP_UNROLL_BODY_SIZE
) {
2872 slang_info_log_print(A
->log
,
2873 "Note: 'for (%s ... )' body is too large/complex"
2880 return GL_FALSE
; /* degenerate case */
2882 if (end
- start
> MAX_FOR_LOOP_UNROLL_ITERATIONS
) {
2883 slang_info_log_print(A
->log
,
2884 "Note: 'for (%s=%d; %s<%d; ++%s)' is too"
2885 " many iterations to unroll",
2886 varName
, start
, varName
, end
, varName
);
2890 if ((end
- start
) * bodySize
> MAX_FOR_LOOP_UNROLL_COMPLEXITY
) {
2891 slang_info_log_print(A
->log
,
2892 "Note: 'for (%s=%d; %s<%d; ++%s)' will generate"
2893 " too much code to unroll",
2894 varName
, start
, varName
, end
, varName
);
2898 return GL_TRUE
; /* we can unroll the loop */
2903 * Unroll a for-loop.
2904 * First we determine the number of iterations to unroll.
2905 * Then for each iteration:
2906 * make a copy of the loop body
2907 * replace instances of the loop variable with the current iteration value
2908 * generate IR code for the body
2909 * \return pointer to generated IR code or NULL if error, out of memory, etc.
2911 static slang_ir_node
*
2912 _slang_unroll_for_loop(slang_assemble_ctx
* A
, const slang_operation
*oper
)
2914 GLint start
, end
, iter
;
2915 slang_ir_node
*n
, *root
= NULL
;
2918 if (oper
->children
[0].type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
) {
2919 /* for (int i=0; ... */
2920 slang_variable
*var
;
2922 varId
= oper
->children
[0].children
[0].a_id
;
2923 var
= _slang_variable_locate(oper
->children
[0].children
[0].locals
,
2925 start
= (GLint
) var
->initializer
->literal
[0];
2929 varId
= oper
->children
[0].children
[0].children
[0].a_id
;
2930 start
= (GLint
) oper
->children
[0].children
[0].children
[1].literal
[0];
2933 end
= (GLint
) oper
->children
[1].children
[0].children
[1].literal
[0];
2935 for (iter
= start
; iter
< end
; iter
++) {
2936 slang_operation
*body
;
2938 /* make a copy of the loop body */
2939 body
= slang_operation_new(1);
2943 if (!slang_operation_copy(body
, &oper
->children
[3]))
2946 /* in body, replace instances of 'varId' with literal 'iter' */
2948 slang_variable
*oldVar
;
2949 slang_operation
*newOper
;
2951 oldVar
= _slang_variable_locate(oper
->locals
, varId
, GL_TRUE
);
2953 /* undeclared loop variable */
2954 slang_operation_delete(body
);
2958 newOper
= slang_operation_new(1);
2959 newOper
->type
= SLANG_OPER_LITERAL_INT
;
2960 newOper
->literal_size
= 1;
2961 newOper
->literal
[0] = iter
;
2963 /* replace instances of the loop variable with newOper */
2964 slang_substitute(A
, body
, 1, &oldVar
, &newOper
, GL_FALSE
);
2967 /* do IR codegen for body */
2968 n
= _slang_gen_operation(A
, body
);
2972 root
= new_seq(root
, n
);
2974 slang_operation_delete(body
);
2982 * Replace 'continue' statement with 'break' inside a for-loop.
2983 * This is a recursive helper function used by _slang_gen_for_without_continue().
2986 replace_continue_with_break(slang_assemble_ctx
*A
, slang_operation
*oper
)
2988 switch (oper
->type
) {
2989 case SLANG_OPER_CONTINUE
:
2990 oper
->type
= SLANG_OPER_BREAK
;
2992 case SLANG_OPER_FOR
:
2994 case SLANG_OPER_WHILE
:
2995 /* stop upon finding a nested loop */
3001 for (i
= 0; i
< oper
->num_children
; i
++) {
3002 replace_continue_with_break(A
, slang_oper_child(oper
, i
));
3010 * Transform a for-loop so that continue statements are converted to breaks.
3011 * Then do normal IR code generation.
3015 * for (INIT; LOOPCOND; INCR) {
3026 * bool _condFlag = 1;
3027 * for (INIT; _condFlag; ) {
3028 * for ( ; _condFlag = LOOPCOND; INCR) {
3040 static slang_ir_node
*
3041 _slang_gen_for_without_continue(slang_assemble_ctx
*A
, slang_operation
*oper
)
3043 slang_operation
*top
;
3044 slang_operation
*outerFor
, *innerFor
, *init
, *cond
, *incr
;
3045 slang_operation
*lhs
, *rhs
;
3047 assert(oper
->type
== SLANG_OPER_FOR
);
3049 top
= slang_operation_new(1);
3050 top
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
;
3051 top
->locals
->outer_scope
= oper
->locals
->outer_scope
;
3052 slang_operation_add_children(top
, 2);
3054 /* declare: bool _condFlag = true */
3056 slang_operation
*condDecl
;
3057 slang_variable
*var
;
3059 condDecl
= slang_oper_child(top
, 0);
3060 condDecl
->type
= SLANG_OPER_VARIABLE_DECL
;
3061 var
= slang_variable_scope_grow(top
->locals
);
3062 slang_fully_specified_type_construct(&var
->type
);
3063 var
->type
.specifier
.type
= SLANG_SPEC_BOOL
;
3064 var
->a_name
= slang_atom_pool_atom(A
->atoms
, "_condFlag");
3065 condDecl
->a_id
= var
->a_name
;
3066 var
->initializer
= slang_operation_new(1);
3067 slang_operation_literal_bool(var
->initializer
, GL_TRUE
);
3070 /* build outer loop: for (INIT; _condFlag; ) { */
3071 outerFor
= slang_oper_child(top
, 1);
3072 outerFor
->type
= SLANG_OPER_FOR
;
3073 slang_operation_add_children(outerFor
, 4);
3075 init
= slang_oper_child(outerFor
, 0);
3076 slang_operation_copy(init
, slang_oper_child(oper
, 0));
3078 cond
= slang_oper_child(outerFor
, 1);
3079 cond
->type
= SLANG_OPER_IDENTIFIER
;
3080 cond
->a_id
= slang_atom_pool_atom(A
->atoms
, "_condFlag");
3082 incr
= slang_oper_child(outerFor
, 2);
3083 incr
->type
= SLANG_OPER_VOID
;
3085 /* body of the outer loop */
3087 slang_operation
*block
= slang_oper_child(outerFor
, 3);
3089 slang_operation_add_children(block
, 2);
3090 block
->type
= SLANG_OPER_BLOCK_NO_NEW_SCOPE
;
3092 /* build inner loop: for ( ; _condFlag = LOOPCOND; INCR) { */
3094 innerFor
= slang_oper_child(block
, 0);
3096 /* make copy of orig loop */
3097 slang_operation_copy(innerFor
, oper
);
3098 assert(innerFor
->type
== SLANG_OPER_FOR
);
3099 innerFor
->locals
->outer_scope
= block
->locals
;
3101 init
= slang_oper_child(innerFor
, 0);
3102 init
->type
= SLANG_OPER_VOID
; /* leak? */
3104 cond
= slang_oper_child(innerFor
, 1);
3105 slang_operation_destruct(cond
);
3106 cond
->type
= SLANG_OPER_ASSIGN
;
3107 cond
->locals
= _slang_variable_scope_new(innerFor
->locals
);
3108 slang_operation_add_children(cond
, 2);
3110 lhs
= slang_oper_child(cond
, 0);
3111 lhs
->type
= SLANG_OPER_IDENTIFIER
;
3112 lhs
->a_id
= slang_atom_pool_atom(A
->atoms
, "_condFlag");
3114 rhs
= slang_oper_child(cond
, 1);
3115 slang_operation_copy(rhs
, slang_oper_child(oper
, 1));
3118 /* if (_condFlag) INCR; */
3120 slang_operation
*ifop
= slang_oper_child(block
, 1);
3121 ifop
->type
= SLANG_OPER_IF
;
3122 slang_operation_add_children(ifop
, 2);
3124 /* re-use cond node build above */
3125 slang_operation_copy(slang_oper_child(ifop
, 0), cond
);
3127 /* incr node from original for-loop operation */
3128 slang_operation_copy(slang_oper_child(ifop
, 1),
3129 slang_oper_child(oper
, 2));
3132 /* finally, replace "continue" with "break" in the inner for-loop */
3133 replace_continue_with_break(A
, slang_oper_child(innerFor
, 3));
3136 return _slang_gen_operation(A
, top
);
3142 * Generate IR for a for-loop. Unrolling will be done when possible.
3144 static slang_ir_node
*
3145 _slang_gen_for(slang_assemble_ctx
* A
, slang_operation
*oper
)
3149 if (!A
->EmitContReturn
) {
3150 /* We don't want to emit CONT instructions. If this for-loop has
3151 * a continue, translate it away.
3153 if (_slang_loop_contains_continue(slang_oper_child(oper
, 3))) {
3154 return _slang_gen_for_without_continue(A
, oper
);
3158 unroll
= _slang_can_unroll_for_loop(A
, oper
);
3160 slang_ir_node
*code
= _slang_unroll_for_loop(A
, oper
);
3165 assert(oper
->type
== SLANG_OPER_FOR
);
3167 /* conventional for-loop code generation */
3170 * init code (child[0])
3172 * BREAK if !expr (child[1])
3173 * body code (child[3])
3175 * incr code (child[2]) // XXX continue here
3177 slang_ir_node
*prevLoop
, *loop
, *cond
, *breakIf
, *body
, *init
, *incr
;
3178 init
= _slang_gen_operation(A
, &oper
->children
[0]);
3179 loop
= new_loop(NULL
);
3181 /* save old, push new loop */
3182 prevLoop
= A
->CurLoop
;
3185 cond
= new_cond(new_not(_slang_gen_operation(A
, &oper
->children
[1])));
3186 breakIf
= new_break_if_true(A
->CurLoop
, cond
);
3187 body
= _slang_gen_operation(A
, &oper
->children
[3]);
3188 incr
= _slang_gen_operation(A
, &oper
->children
[2]);
3190 loop
->Children
[0] = new_seq(breakIf
, body
);
3191 loop
->Children
[1] = incr
; /* tail code */
3193 /* pop loop, restore prev */
3194 A
->CurLoop
= prevLoop
;
3196 return new_seq(init
, loop
);
3201 static slang_ir_node
*
3202 _slang_gen_continue(slang_assemble_ctx
* A
, const slang_operation
*oper
)
3204 slang_ir_node
*n
, *loopNode
;
3205 assert(oper
->type
== SLANG_OPER_CONTINUE
);
3206 loopNode
= A
->CurLoop
;
3208 assert(loopNode
->Opcode
== IR_LOOP
);
3209 n
= new_node0(IR_CONT
);
3211 n
->Parent
= loopNode
;
3212 /* insert this node at head of linked list */
3213 n
->List
= loopNode
->List
;
3221 * Determine if the given operation is of a specific type.
3224 is_operation_type(const slang_operation
*oper
, slang_operation_type type
)
3226 if (oper
->type
== type
)
3228 else if ((oper
->type
== SLANG_OPER_BLOCK_NEW_SCOPE
||
3229 oper
->type
== SLANG_OPER_BLOCK_NO_NEW_SCOPE
) &&
3230 oper
->num_children
== 1)
3231 return is_operation_type(&oper
->children
[0], type
);
3238 * Generate IR tree for an if/then/else conditional using high-level
3239 * IR_IF instruction.
3241 static slang_ir_node
*
3242 _slang_gen_if(slang_assemble_ctx
* A
, const slang_operation
*oper
)
3245 * eval expr (child[0])
3252 const GLboolean haveElseClause
= !_slang_is_noop(&oper
->children
[2]);
3253 slang_ir_node
*ifNode
, *cond
, *ifBody
, *elseBody
;
3254 GLboolean isConst
, constTrue
;
3256 /* type-check expression */
3257 if (!_slang_is_boolean(A
, &oper
->children
[0])) {
3258 slang_info_log_error(A
->log
, "boolean expression expected for 'if'");
3262 if (!_slang_is_scalar_or_boolean(A
, &oper
->children
[0])) {
3263 slang_info_log_error(A
->log
, "scalar/boolean expression expected for 'if'");
3267 isConst
= _slang_is_constant_cond(&oper
->children
[0], &constTrue
);
3271 return _slang_gen_operation(A
, &oper
->children
[1]);
3274 /* if (false) ... */
3275 return _slang_gen_operation(A
, &oper
->children
[2]);
3279 cond
= _slang_gen_operation(A
, &oper
->children
[0]);
3280 cond
= new_cond(cond
);
3282 if (is_operation_type(&oper
->children
[1], SLANG_OPER_BREAK
)
3283 && !haveElseClause
) {
3284 /* Special case: generate a conditional break */
3285 if (!A
->CurLoop
) /* probably trying to unroll */
3287 ifBody
= new_break_if_true(A
->CurLoop
, cond
);
3290 else if (is_operation_type(&oper
->children
[1], SLANG_OPER_CONTINUE
)
3291 && !haveElseClause
) {
3292 /* Special case: generate a conditional continue */
3293 if (!A
->CurLoop
) /* probably trying to unroll */
3295 ifBody
= new_cont_if_true(A
->CurLoop
, cond
);
3300 ifBody
= _slang_gen_operation(A
, &oper
->children
[1]);
3302 elseBody
= _slang_gen_operation(A
, &oper
->children
[2]);
3305 ifNode
= new_if(cond
, ifBody
, elseBody
);
3312 static slang_ir_node
*
3313 _slang_gen_not(slang_assemble_ctx
* A
, const slang_operation
*oper
)
3317 assert(oper
->type
== SLANG_OPER_NOT
);
3319 /* type-check expression */
3320 if (!_slang_is_scalar_or_boolean(A
, &oper
->children
[0])) {
3321 slang_info_log_error(A
->log
,
3322 "scalar/boolean expression expected for '!'");
3326 n
= _slang_gen_operation(A
, &oper
->children
[0]);
3334 static slang_ir_node
*
3335 _slang_gen_xor(slang_assemble_ctx
* A
, const slang_operation
*oper
)
3337 slang_ir_node
*n1
, *n2
;
3339 assert(oper
->type
== SLANG_OPER_LOGICALXOR
);
3341 if (!_slang_is_scalar_or_boolean(A
, &oper
->children
[0]) ||
3342 !_slang_is_scalar_or_boolean(A
, &oper
->children
[0])) {
3343 slang_info_log_error(A
->log
,
3344 "scalar/boolean expressions expected for '^^'");
3348 n1
= _slang_gen_operation(A
, &oper
->children
[0]);
3351 n2
= _slang_gen_operation(A
, &oper
->children
[1]);
3354 return new_node2(IR_NOTEQUAL
, n1
, n2
);
3359 * Generate IR node for storage of a temporary of given size.
3361 static slang_ir_node
*
3362 _slang_gen_temporary(GLint size
)
3364 slang_ir_storage
*store
;
3365 slang_ir_node
*n
= NULL
;
3367 store
= _slang_new_ir_storage(PROGRAM_TEMPORARY
, -2, size
);
3369 n
= new_node0(IR_VAR_DECL
);
3382 * Generate program constants for an array.
3383 * Ex: const vec2[3] v = vec2[3](vec2(1,1), vec2(2,2), vec2(3,3));
3384 * This will allocate and initialize three vector constants, storing
3385 * the array in constant memory, not temporaries like a non-const array.
3386 * This can also be used for uniform array initializers.
3387 * \return GL_TRUE for success, GL_FALSE if failure (semantic error, etc).
3390 make_constant_array(slang_assemble_ctx
*A
,
3391 slang_variable
*var
,
3392 slang_operation
*initializer
)
3394 struct gl_program
*prog
= A
->program
;
3395 const GLenum datatype
= _slang_gltype_from_specifier(&var
->type
.specifier
);
3396 const char *varName
= (char *) var
->a_name
;
3397 const GLuint numElements
= initializer
->num_children
;
3403 var
->store
= _slang_new_ir_storage(PROGRAM_UNDEFINED
, -6, -6);
3405 size
= var
->store
->Size
;
3407 assert(var
->type
.qualifier
== SLANG_QUAL_CONST
||
3408 var
->type
.qualifier
== SLANG_QUAL_UNIFORM
);
3409 assert(initializer
->type
== SLANG_OPER_CALL
);
3410 assert(initializer
->array_constructor
);
3412 values
= (GLfloat
*) _mesa_malloc(numElements
* 4 * sizeof(GLfloat
));
3414 /* convert constructor params into ordinary floats */
3415 for (i
= 0; i
< numElements
; i
++) {
3416 const slang_operation
*op
= &initializer
->children
[i
];
3417 if (op
->type
!= SLANG_OPER_LITERAL_FLOAT
) {
3418 /* unsupported type for this optimization */
3422 for (j
= 0; j
< op
->literal_size
; j
++) {
3423 values
[i
* 4 + j
] = op
->literal
[j
];
3425 for ( ; j
< 4; j
++) {
3426 values
[i
* 4 + j
] = 0.0f
;
3430 /* slightly different paths for constants vs. uniforms */
3431 if (var
->type
.qualifier
== SLANG_QUAL_UNIFORM
) {
3432 var
->store
->File
= PROGRAM_UNIFORM
;
3433 var
->store
->Index
= _mesa_add_uniform(prog
->Parameters
, varName
,
3434 size
, datatype
, values
);
3437 var
->store
->File
= PROGRAM_CONSTANT
;
3438 var
->store
->Index
= _mesa_add_named_constant(prog
->Parameters
, varName
,
3441 assert(var
->store
->Size
== size
);
3451 * Generate IR node for allocating/declaring a variable (either a local or
3453 * Generally, this involves allocating an slang_ir_storage instance for the
3454 * variable, choosing a register file (temporary, constant, etc).
3455 * For ordinary variables we do not yet allocate storage though. We do that
3456 * when we find the first actual use of the variable to avoid allocating temp
3457 * regs that will never get used.
3458 * At this time, uniforms are always allocated space in this function.
3460 * \param initializer Optional initializer expression for the variable.
3462 static slang_ir_node
*
3463 _slang_gen_var_decl(slang_assemble_ctx
*A
, slang_variable
*var
,
3464 slang_operation
*initializer
)
3466 const char *varName
= (const char *) var
->a_name
;
3467 const GLenum datatype
= _slang_gltype_from_specifier(&var
->type
.specifier
);
3468 slang_ir_node
*varDecl
, *n
;
3469 slang_ir_storage
*store
;
3470 GLint arrayLen
, size
, totalSize
; /* if array then totalSize > size */
3471 gl_register_file file
;
3473 /*assert(!var->declared);*/
3474 var
->declared
= GL_TRUE
;
3476 /* determine GPU register file for simple cases */
3477 if (is_sampler_type(&var
->type
)) {
3478 file
= PROGRAM_SAMPLER
;
3480 else if (var
->type
.qualifier
== SLANG_QUAL_UNIFORM
) {
3481 file
= PROGRAM_UNIFORM
;
3484 file
= PROGRAM_TEMPORARY
;
3487 size
= _slang_sizeof_type_specifier(&var
->type
.specifier
);
3489 slang_info_log_error(A
->log
, "invalid declaration for '%s'", varName
);
3493 arrayLen
= _slang_array_length(var
);
3494 totalSize
= _slang_array_size(size
, arrayLen
);
3496 /* Allocate IR node for the declaration */
3497 varDecl
= new_node0(IR_VAR_DECL
);
3501 /* Allocate slang_ir_storage for this variable if needed.
3502 * Note that we may not actually allocate a constant or temporary register
3506 GLint index
= -7; /* TBD / unknown */
3507 var
->store
= _slang_new_ir_storage(file
, index
, totalSize
);
3509 return NULL
; /* out of memory */
3512 /* set the IR node's Var and Store pointers */
3514 varDecl
->Store
= var
->store
;
3519 /* if there's an initializer, generate IR for the expression */
3521 slang_ir_node
*varRef
, *init
;
3523 if (var
->type
.qualifier
== SLANG_QUAL_CONST
) {
3524 /* if the variable is const, the initializer must be a const
3525 * expression as well.
3528 if (!_slang_is_constant_expr(initializer
)) {
3529 slang_info_log_error(A
->log
,
3530 "initializer for %s not constant", varName
);
3536 /* IR for the variable we're initializing */
3537 varRef
= new_var(A
, var
);
3539 slang_info_log_error(A
->log
, "out of memory");
3543 /* constant-folding, etc here */
3544 _slang_simplify(initializer
, &A
->space
, A
->atoms
);
3546 /* look for simple constant-valued variables and uniforms */
3547 if (var
->type
.qualifier
== SLANG_QUAL_CONST
||
3548 var
->type
.qualifier
== SLANG_QUAL_UNIFORM
) {
3550 if (initializer
->type
== SLANG_OPER_CALL
&&
3551 initializer
->array_constructor
) {
3552 /* array initializer */
3553 if (make_constant_array(A
, var
, initializer
))
3556 else if (initializer
->type
== SLANG_OPER_LITERAL_FLOAT
||
3557 initializer
->type
== SLANG_OPER_LITERAL_INT
) {
3558 /* simple float/vector initializer */
3559 if (store
->File
== PROGRAM_UNIFORM
) {
3560 store
->Index
= _mesa_add_uniform(A
->program
->Parameters
,
3562 totalSize
, datatype
,
3563 initializer
->literal
);
3564 store
->Swizzle
= _slang_var_swizzle(size
, 0);
3569 store
->File
= PROGRAM_CONSTANT
;
3570 store
->Index
= _mesa_add_named_constant(A
->program
->Parameters
,
3572 initializer
->literal
,
3574 store
->Swizzle
= _slang_var_swizzle(size
, 0);
3581 /* IR for initializer */
3582 init
= _slang_gen_operation(A
, initializer
);
3586 /* XXX remove this when type checking is added above */
3587 if (init
->Store
&& init
->Store
->Size
!= totalSize
) {
3588 slang_info_log_error(A
->log
, "invalid assignment (wrong types)");
3592 /* assign RHS to LHS */
3593 n
= new_node2(IR_COPY
, varRef
, init
);
3594 n
= new_seq(varDecl
, n
);
3597 /* no initializer */
3601 if (store
->File
== PROGRAM_UNIFORM
&& store
->Index
< 0) {
3602 /* always need to allocate storage for uniforms at this point */
3603 store
->Index
= _mesa_add_uniform(A
->program
->Parameters
, varName
,
3604 totalSize
, datatype
, NULL
);
3605 store
->Swizzle
= _slang_var_swizzle(size
, 0);
3609 printf("%s var %p %s store=%p index=%d size=%d\n",
3610 __FUNCTION__
, (void *) var
, (char *) varName
,
3611 (void *) store
, store
->Index
, store
->Size
);
3619 * Generate code for a selection expression: b ? x : y
3620 * XXX In some cases we could implement a selection expression
3621 * with an LRP instruction (use the boolean as the interpolant).
3622 * Otherwise, we use an IF/ELSE/ENDIF construct.
3624 static slang_ir_node
*
3625 _slang_gen_select(slang_assemble_ctx
*A
, slang_operation
*oper
)
3627 slang_ir_node
*cond
, *ifNode
, *trueExpr
, *falseExpr
, *trueNode
, *falseNode
;
3628 slang_ir_node
*tmpDecl
, *tmpVar
, *tree
;
3629 slang_typeinfo type0
, type1
, type2
;
3630 int size
, isBool
, isEqual
;
3632 assert(oper
->type
== SLANG_OPER_SELECT
);
3633 assert(oper
->num_children
== 3);
3635 /* type of children[0] must be boolean */
3636 slang_typeinfo_construct(&type0
);
3637 typeof_operation(A
, &oper
->children
[0], &type0
);
3638 isBool
= (type0
.spec
.type
== SLANG_SPEC_BOOL
);
3639 slang_typeinfo_destruct(&type0
);
3641 slang_info_log_error(A
->log
, "selector type is not boolean");
3645 slang_typeinfo_construct(&type1
);
3646 slang_typeinfo_construct(&type2
);
3647 typeof_operation(A
, &oper
->children
[1], &type1
);
3648 typeof_operation(A
, &oper
->children
[2], &type2
);
3649 isEqual
= slang_type_specifier_equal(&type1
.spec
, &type2
.spec
);
3650 slang_typeinfo_destruct(&type1
);
3651 slang_typeinfo_destruct(&type2
);
3653 slang_info_log_error(A
->log
, "incompatible types for ?: operator");
3657 /* size of x or y's type */
3658 size
= _slang_sizeof_type_specifier(&type1
.spec
);
3662 tmpDecl
= _slang_gen_temporary(size
);
3664 /* the condition (child 0) */
3665 cond
= _slang_gen_operation(A
, &oper
->children
[0]);
3666 cond
= new_cond(cond
);
3668 /* if-true body (child 1) */
3669 tmpVar
= new_node0(IR_VAR
);
3670 tmpVar
->Store
= tmpDecl
->Store
;
3671 trueExpr
= _slang_gen_operation(A
, &oper
->children
[1]);
3672 trueNode
= new_node2(IR_COPY
, tmpVar
, trueExpr
);
3674 /* if-false body (child 2) */
3675 tmpVar
= new_node0(IR_VAR
);
3676 tmpVar
->Store
= tmpDecl
->Store
;
3677 falseExpr
= _slang_gen_operation(A
, &oper
->children
[2]);
3678 falseNode
= new_node2(IR_COPY
, tmpVar
, falseExpr
);
3680 ifNode
= new_if(cond
, trueNode
, falseNode
);
3683 tmpVar
= new_node0(IR_VAR
);
3684 tmpVar
->Store
= tmpDecl
->Store
;
3686 tree
= new_seq(ifNode
, tmpVar
);
3687 tree
= new_seq(tmpDecl
, tree
);
3689 /*_slang_print_ir_tree(tree, 10);*/
3695 * Generate code for &&.
3697 static slang_ir_node
*
3698 _slang_gen_logical_and(slang_assemble_ctx
*A
, slang_operation
*oper
)
3700 /* rewrite "a && b" as "a ? b : false" */
3701 slang_operation
*select
;
3704 select
= slang_operation_new(1);
3705 select
->type
= SLANG_OPER_SELECT
;
3706 select
->num_children
= 3;
3707 select
->children
= slang_operation_new(3);
3709 slang_operation_copy(&select
->children
[0], &oper
->children
[0]);
3710 slang_operation_copy(&select
->children
[1], &oper
->children
[1]);
3711 select
->children
[2].type
= SLANG_OPER_LITERAL_BOOL
;
3712 ASSIGN_4V(select
->children
[2].literal
, 0, 0, 0, 0); /* false */
3713 select
->children
[2].literal_size
= 1;
3715 n
= _slang_gen_select(A
, select
);
3721 * Generate code for ||.
3723 static slang_ir_node
*
3724 _slang_gen_logical_or(slang_assemble_ctx
*A
, slang_operation
*oper
)
3726 /* rewrite "a || b" as "a ? true : b" */
3727 slang_operation
*select
;
3730 select
= slang_operation_new(1);
3731 select
->type
= SLANG_OPER_SELECT
;
3732 select
->num_children
= 3;
3733 select
->children
= slang_operation_new(3);
3735 slang_operation_copy(&select
->children
[0], &oper
->children
[0]);
3736 select
->children
[1].type
= SLANG_OPER_LITERAL_BOOL
;
3737 ASSIGN_4V(select
->children
[1].literal
, 1, 1, 1, 1); /* true */
3738 select
->children
[1].literal_size
= 1;
3739 slang_operation_copy(&select
->children
[2], &oper
->children
[1]);
3741 n
= _slang_gen_select(A
, select
);
3747 * Generate IR tree for a return statement.
3749 static slang_ir_node
*
3750 _slang_gen_return(slang_assemble_ctx
* A
, slang_operation
*oper
)
3752 const GLboolean haveReturnValue
3753 = (oper
->num_children
== 1 && oper
->children
[0].type
!= SLANG_OPER_VOID
);
3755 /* error checking */
3756 assert(A
->CurFunction
);
3757 if (haveReturnValue
&&
3758 A
->CurFunction
->header
.type
.specifier
.type
== SLANG_SPEC_VOID
) {
3759 slang_info_log_error(A
->log
, "illegal return expression");
3762 else if (!haveReturnValue
&&
3763 A
->CurFunction
->header
.type
.specifier
.type
!= SLANG_SPEC_VOID
) {
3764 slang_info_log_error(A
->log
, "return statement requires an expression");
3768 if (!haveReturnValue
) {
3769 return new_return(A
->curFuncEndLabel
);
3777 * return; // goto __endOfFunction
3779 slang_operation
*assign
;
3780 slang_atom a_retVal
;
3783 a_retVal
= slang_atom_pool_atom(A
->atoms
, "__retVal");
3789 _slang_variable_locate(oper
->locals
, a_retVal
, GL_TRUE
);
3791 /* trying to return a value in a void-valued function */
3797 assign
= slang_operation_new(1);
3798 assign
->type
= SLANG_OPER_ASSIGN
;
3799 assign
->num_children
= 2;
3800 assign
->children
= slang_operation_new(2);
3801 /* lhs (__retVal) */
3802 assign
->children
[0].type
= SLANG_OPER_IDENTIFIER
;
3803 assign
->children
[0].a_id
= a_retVal
;
3804 assign
->children
[0].locals
->outer_scope
= assign
->locals
;
3806 /* XXX we might be able to avoid this copy someday */
3807 slang_operation_copy(&assign
->children
[1], &oper
->children
[0]);
3809 /* assemble the new code */
3810 n
= new_seq(_slang_gen_operation(A
, assign
),
3811 new_return(A
->curFuncEndLabel
));
3813 slang_operation_delete(assign
);
3821 * Determine if the given operation/expression is const-valued.
3824 _slang_is_constant_expr(const slang_operation
*oper
)
3826 slang_variable
*var
;
3829 switch (oper
->type
) {
3830 case SLANG_OPER_IDENTIFIER
:
3831 var
= _slang_variable_locate(oper
->locals
, oper
->a_id
, GL_TRUE
);
3832 if (var
&& var
->type
.qualifier
== SLANG_QUAL_CONST
)
3836 for (i
= 0; i
< oper
->num_children
; i
++) {
3837 if (!_slang_is_constant_expr(&oper
->children
[i
]))
3847 * Check if an assignment of type t1 to t0 is legal.
3848 * XXX more cases needed.
3851 _slang_assignment_compatible(slang_assemble_ctx
*A
,
3852 slang_operation
*op0
,
3853 slang_operation
*op1
)
3855 slang_typeinfo t0
, t1
;
3858 if (op0
->type
== SLANG_OPER_POSTINCREMENT
||
3859 op0
->type
== SLANG_OPER_POSTDECREMENT
) {
3863 slang_typeinfo_construct(&t0
);
3864 typeof_operation(A
, op0
, &t0
);
3866 slang_typeinfo_construct(&t1
);
3867 typeof_operation(A
, op1
, &t1
);
3869 sz0
= _slang_sizeof_type_specifier(&t0
.spec
);
3870 sz1
= _slang_sizeof_type_specifier(&t1
.spec
);
3874 /*printf("assignment size mismatch %u vs %u\n", sz0, sz1);*/
3879 if (t0
.spec
.type
== SLANG_SPEC_STRUCT
&&
3880 t1
.spec
.type
== SLANG_SPEC_STRUCT
&&
3881 t0
.spec
._struct
->a_name
!= t1
.spec
._struct
->a_name
)
3884 if (t0
.spec
.type
== SLANG_SPEC_FLOAT
&&
3885 t1
.spec
.type
== SLANG_SPEC_BOOL
)
3888 #if 0 /* not used just yet - causes problems elsewhere */
3889 if (t0
.spec
.type
== SLANG_SPEC_INT
&&
3890 t1
.spec
.type
== SLANG_SPEC_FLOAT
)
3894 if (t0
.spec
.type
== SLANG_SPEC_BOOL
&&
3895 t1
.spec
.type
== SLANG_SPEC_FLOAT
)
3898 if (t0
.spec
.type
== SLANG_SPEC_BOOL
&&
3899 t1
.spec
.type
== SLANG_SPEC_INT
)
3907 * Generate IR tree for a local variable declaration.
3908 * Basically do some error checking and call _slang_gen_var_decl().
3910 static slang_ir_node
*
3911 _slang_gen_declaration(slang_assemble_ctx
*A
, slang_operation
*oper
)
3913 const char *varName
= (char *) oper
->a_id
;
3914 slang_variable
*var
;
3915 slang_ir_node
*varDecl
;
3916 slang_operation
*initializer
;
3918 assert(oper
->type
== SLANG_OPER_VARIABLE_DECL
);
3919 assert(oper
->num_children
<= 1);
3922 /* lookup the variable by name */
3923 var
= _slang_variable_locate(oper
->locals
, oper
->a_id
, GL_TRUE
);
3925 return NULL
; /* "shouldn't happen" */
3927 if (var
->type
.qualifier
== SLANG_QUAL_ATTRIBUTE
||
3928 var
->type
.qualifier
== SLANG_QUAL_VARYING
||
3929 var
->type
.qualifier
== SLANG_QUAL_UNIFORM
) {
3930 /* can't declare attribute/uniform vars inside functions */
3931 slang_info_log_error(A
->log
,
3932 "local variable '%s' cannot be an attribute/uniform/varying",
3939 slang_info_log_error(A
->log
, "variable '%s' redeclared", varName
);
3944 /* check if the var has an initializer */
3945 if (oper
->num_children
> 0) {
3946 assert(oper
->num_children
== 1);
3947 initializer
= &oper
->children
[0];
3949 else if (var
->initializer
) {
3950 initializer
= var
->initializer
;
3957 /* check/compare var type and initializer type */
3958 if (!_slang_assignment_compatible(A
, oper
, initializer
)) {
3959 slang_info_log_error(A
->log
, "incompatible types in assignment");
3964 if (var
->type
.qualifier
== SLANG_QUAL_CONST
) {
3965 slang_info_log_error(A
->log
,
3966 "const-qualified variable '%s' requires initializer",
3972 /* Generate IR node */
3973 varDecl
= _slang_gen_var_decl(A
, var
, initializer
);
3982 * Generate IR tree for a reference to a variable (such as in an expression).
3983 * This is different from a variable declaration.
3985 static slang_ir_node
*
3986 _slang_gen_variable(slang_assemble_ctx
* A
, slang_operation
*oper
)
3988 /* If there's a variable associated with this oper (from inlining)
3989 * use it. Otherwise, use the oper's var id.
3991 slang_atom name
= oper
->var
? oper
->var
->a_name
: oper
->a_id
;
3992 slang_variable
*var
= _slang_variable_locate(oper
->locals
, name
, GL_TRUE
);
3995 slang_info_log_error(A
->log
, "undefined variable '%s'", (char *) name
);
3998 assert(var
->declared
);
3999 n
= new_var(A
, var
);
4006 * Return the number of components actually named by the swizzle.
4007 * Recall that swizzles may have undefined/don't-care values.
4010 swizzle_size(GLuint swizzle
)
4013 for (i
= 0; i
< 4; i
++) {
4014 GLuint swz
= GET_SWZ(swizzle
, i
);
4015 size
+= (swz
>= 0 && swz
<= 3);
4021 static slang_ir_node
*
4022 _slang_gen_swizzle(slang_ir_node
*child
, GLuint swizzle
)
4024 slang_ir_node
*n
= new_node1(IR_SWIZZLE
, child
);
4028 n
->Store
= _slang_new_ir_storage_relative(0,
4029 swizzle_size(swizzle
),
4031 n
->Store
->Swizzle
= swizzle
;
4038 is_store_writable(const slang_assemble_ctx
*A
, const slang_ir_storage
*store
)
4040 while (store
->Parent
)
4041 store
= store
->Parent
;
4043 if (!(store
->File
== PROGRAM_OUTPUT
||
4044 store
->File
== PROGRAM_TEMPORARY
||
4045 (store
->File
== PROGRAM_VARYING
&&
4046 A
->program
->Target
== GL_VERTEX_PROGRAM_ARB
))) {
4056 * Walk up an IR storage path to compute the final swizzle.
4057 * This is used when we find an expression such as "foo.xz.yx".
4060 root_swizzle(const slang_ir_storage
*st
)
4062 GLuint swizzle
= st
->Swizzle
;
4063 while (st
->Parent
) {
4065 swizzle
= _slang_swizzle_swizzle(st
->Swizzle
, swizzle
);
4072 * Generate IR tree for an assignment (=).
4074 static slang_ir_node
*
4075 _slang_gen_assignment(slang_assemble_ctx
* A
, slang_operation
*oper
)
4077 if (oper
->children
[0].type
== SLANG_OPER_IDENTIFIER
) {
4078 /* Check that var is writeable */
4080 = _slang_variable_locate(oper
->children
[0].locals
,
4081 oper
->children
[0].a_id
, GL_TRUE
);
4083 slang_info_log_error(A
->log
, "undefined variable '%s'",
4084 (char *) oper
->children
[0].a_id
);
4087 if (var
->type
.qualifier
== SLANG_QUAL_CONST
||
4088 var
->type
.qualifier
== SLANG_QUAL_ATTRIBUTE
||
4089 var
->type
.qualifier
== SLANG_QUAL_UNIFORM
||
4090 (var
->type
.qualifier
== SLANG_QUAL_VARYING
&&
4091 A
->program
->Target
== GL_FRAGMENT_PROGRAM_ARB
)) {
4092 slang_info_log_error(A
->log
,
4093 "illegal assignment to read-only variable '%s'",
4094 (char *) oper
->children
[0].a_id
);
4099 if (oper
->children
[0].type
== SLANG_OPER_IDENTIFIER
&&
4100 oper
->children
[1].type
== SLANG_OPER_CALL
) {
4101 /* Special case of: x = f(a, b)
4102 * Replace with f(a, b, x) (where x == hidden __retVal out param)
4104 * XXX this could be even more effective if we could accomodate
4105 * cases such as "v.x = f();" - would help with typical vertex
4109 n
= _slang_gen_function_call_name(A
,
4110 (const char *) oper
->children
[1].a_id
,
4111 &oper
->children
[1], &oper
->children
[0]);
4115 slang_ir_node
*n
, *lhs
, *rhs
;
4117 /* lhs and rhs type checking */
4118 if (!_slang_assignment_compatible(A
,
4120 &oper
->children
[1])) {
4121 slang_info_log_error(A
->log
, "incompatible types in assignment");
4125 lhs
= _slang_gen_operation(A
, &oper
->children
[0]);
4131 slang_info_log_error(A
->log
,
4132 "invalid left hand side for assignment");
4136 /* check that lhs is writable */
4137 if (!is_store_writable(A
, lhs
->Store
)) {
4138 slang_info_log_error(A
->log
,
4139 "illegal assignment to read-only l-value");
4143 rhs
= _slang_gen_operation(A
, &oper
->children
[1]);
4145 /* convert lhs swizzle into writemask */
4146 const GLuint swizzle
= root_swizzle(lhs
->Store
);
4147 GLuint writemask
, newSwizzle
= 0x0;
4148 if (!swizzle_to_writemask(A
, swizzle
, &writemask
, &newSwizzle
)) {
4149 /* Non-simple writemask, need to swizzle right hand side in
4150 * order to put components into the right place.
4152 rhs
= _slang_gen_swizzle(rhs
, newSwizzle
);
4154 n
= new_node2(IR_COPY
, lhs
, rhs
);
4165 * Generate IR tree for referencing a field in a struct (or basic vector type)
4167 static slang_ir_node
*
4168 _slang_gen_struct_field(slang_assemble_ctx
* A
, slang_operation
*oper
)
4172 /* type of struct */
4173 slang_typeinfo_construct(&ti
);
4174 typeof_operation(A
, &oper
->children
[0], &ti
);
4176 if (_slang_type_is_vector(ti
.spec
.type
)) {
4177 /* the field should be a swizzle */
4178 const GLuint rows
= _slang_type_dim(ti
.spec
.type
);
4182 if (!_slang_is_swizzle((char *) oper
->a_id
, rows
, &swz
)) {
4183 slang_info_log_error(A
->log
, "Bad swizzle");
4186 swizzle
= MAKE_SWIZZLE4(swz
.swizzle
[0],
4191 n
= _slang_gen_operation(A
, &oper
->children
[0]);
4192 /* create new parent node with swizzle */
4194 n
= _slang_gen_swizzle(n
, swizzle
);
4197 else if ( ti
.spec
.type
== SLANG_SPEC_FLOAT
4198 || ti
.spec
.type
== SLANG_SPEC_INT
4199 || ti
.spec
.type
== SLANG_SPEC_BOOL
) {
4200 const GLuint rows
= 1;
4204 if (!_slang_is_swizzle((char *) oper
->a_id
, rows
, &swz
)) {
4205 slang_info_log_error(A
->log
, "Bad swizzle");
4207 swizzle
= MAKE_SWIZZLE4(swz
.swizzle
[0],
4211 n
= _slang_gen_operation(A
, &oper
->children
[0]);
4212 /* create new parent node with swizzle */
4213 n
= _slang_gen_swizzle(n
, swizzle
);
4217 /* the field is a structure member (base.field) */
4218 /* oper->children[0] is the base */
4219 /* oper->a_id is the field name */
4220 slang_ir_node
*base
, *n
;
4221 slang_typeinfo field_ti
;
4222 GLint fieldSize
, fieldOffset
= -1;
4225 slang_typeinfo_construct(&field_ti
);
4226 typeof_operation(A
, oper
, &field_ti
);
4228 fieldSize
= _slang_sizeof_type_specifier(&field_ti
.spec
);
4230 fieldOffset
= _slang_field_offset(&ti
.spec
, oper
->a_id
);
4232 if (fieldSize
== 0 || fieldOffset
< 0) {
4233 const char *structName
;
4234 if (ti
.spec
._struct
)
4235 structName
= (char *) ti
.spec
._struct
->a_name
;
4237 structName
= "unknown";
4238 slang_info_log_error(A
->log
,
4239 "\"%s\" is not a member of struct \"%s\"",
4240 (char *) oper
->a_id
, structName
);
4243 assert(fieldSize
>= 0);
4245 base
= _slang_gen_operation(A
, &oper
->children
[0]);
4247 /* error msg should have already been logged */
4251 n
= new_node1(IR_FIELD
, base
);
4255 n
->Field
= (char *) oper
->a_id
;
4257 /* Store the field's offset in storage->Index */
4258 n
->Store
= _slang_new_ir_storage(base
->Store
->File
,
4268 * Gen code for array indexing.
4270 static slang_ir_node
*
4271 _slang_gen_array_element(slang_assemble_ctx
* A
, slang_operation
*oper
)
4273 slang_typeinfo array_ti
;
4275 /* get array's type info */
4276 slang_typeinfo_construct(&array_ti
);
4277 typeof_operation(A
, &oper
->children
[0], &array_ti
);
4279 if (_slang_type_is_vector(array_ti
.spec
.type
)) {
4280 /* indexing a simple vector type: "vec4 v; v[0]=p;" */
4281 /* translate the index into a swizzle/writemask: "v.x=p" */
4282 const GLuint max
= _slang_type_dim(array_ti
.spec
.type
);
4286 index
= (GLint
) oper
->children
[1].literal
[0];
4287 if (oper
->children
[1].type
!= SLANG_OPER_LITERAL_INT
||
4288 index
>= (GLint
) max
) {
4290 slang_info_log_error(A
->log
, "Invalid array index for vector type");
4291 printf("type = %d\n", oper
->children
[1].type
);
4292 printf("index = %d, max = %d\n", index
, max
);
4293 printf("array = %s\n", (char*)oper
->children
[0].a_id
);
4294 printf("index = %s\n", (char*)oper
->children
[1].a_id
);
4301 n
= _slang_gen_operation(A
, &oper
->children
[0]);
4303 /* use swizzle to access the element */
4304 GLuint swizzle
= MAKE_SWIZZLE4(SWIZZLE_X
+ index
,
4308 n
= _slang_gen_swizzle(n
, swizzle
);
4314 /* conventional array */
4315 slang_typeinfo elem_ti
;
4316 slang_ir_node
*elem
, *array
, *index
;
4317 GLint elemSize
, arrayLen
;
4319 /* size of array element */
4320 slang_typeinfo_construct(&elem_ti
);
4321 typeof_operation(A
, oper
, &elem_ti
);
4322 elemSize
= _slang_sizeof_type_specifier(&elem_ti
.spec
);
4324 if (_slang_type_is_matrix(array_ti
.spec
.type
))
4325 arrayLen
= _slang_type_dim(array_ti
.spec
.type
);
4327 arrayLen
= array_ti
.array_len
;
4329 slang_typeinfo_destruct(&array_ti
);
4330 slang_typeinfo_destruct(&elem_ti
);
4332 if (elemSize
<= 0) {
4333 /* unknown var or type */
4334 slang_info_log_error(A
->log
, "Undefined variable or type");
4338 array
= _slang_gen_operation(A
, &oper
->children
[0]);
4339 index
= _slang_gen_operation(A
, &oper
->children
[1]);
4340 if (array
&& index
) {
4342 GLint constIndex
= -1;
4343 if (index
->Opcode
== IR_FLOAT
) {
4344 constIndex
= (int) index
->Value
[0];
4345 if (constIndex
< 0 || constIndex
>= arrayLen
) {
4346 slang_info_log_error(A
->log
,
4347 "Array index out of bounds (index=%d size=%d)",
4348 constIndex
, arrayLen
);
4349 _slang_free_ir_tree(array
);
4350 _slang_free_ir_tree(index
);
4355 if (!array
->Store
) {
4356 slang_info_log_error(A
->log
, "Invalid array");
4360 elem
= new_node2(IR_ELEMENT
, array
, index
);
4362 /* The storage info here will be updated during code emit */
4363 elem
->Store
= _slang_new_ir_storage(array
->Store
->File
,
4364 array
->Store
->Index
,
4366 elem
->Store
->Swizzle
= _slang_var_swizzle(elemSize
, 0);
4370 _slang_free_ir_tree(array
);
4371 _slang_free_ir_tree(index
);
4378 static slang_ir_node
*
4379 _slang_gen_compare(slang_assemble_ctx
*A
, slang_operation
*oper
,
4380 slang_ir_opcode opcode
)
4382 slang_typeinfo t0
, t1
;
4385 slang_typeinfo_construct(&t0
);
4386 typeof_operation(A
, &oper
->children
[0], &t0
);
4388 slang_typeinfo_construct(&t1
);
4389 typeof_operation(A
, &oper
->children
[0], &t1
);
4391 if (t0
.spec
.type
== SLANG_SPEC_ARRAY
||
4392 t1
.spec
.type
== SLANG_SPEC_ARRAY
) {
4393 slang_info_log_error(A
->log
, "Illegal array comparison");
4397 if (oper
->type
!= SLANG_OPER_EQUAL
&&
4398 oper
->type
!= SLANG_OPER_NOTEQUAL
) {
4399 /* <, <=, >, >= can only be used with scalars */
4400 if ((t0
.spec
.type
!= SLANG_SPEC_INT
&&
4401 t0
.spec
.type
!= SLANG_SPEC_FLOAT
) ||
4402 (t1
.spec
.type
!= SLANG_SPEC_INT
&&
4403 t1
.spec
.type
!= SLANG_SPEC_FLOAT
)) {
4404 slang_info_log_error(A
->log
, "Incompatible type(s) for inequality operator");
4409 n
= new_node2(opcode
,
4410 _slang_gen_operation(A
, &oper
->children
[0]),
4411 _slang_gen_operation(A
, &oper
->children
[1]));
4413 /* result is a bool (size 1) */
4414 n
->Store
= _slang_new_ir_storage(PROGRAM_TEMPORARY
, -1, 1);
4422 print_vars(slang_variable_scope
*s
)
4426 for (i
= 0; i
< s
->num_variables
; i
++) {
4428 (char*) s
->variables
[i
]->a_name
,
4429 s
->variables
[i
]->declared
);
4439 _slang_undeclare_vars(slang_variable_scope
*locals
)
4441 if (locals
->num_variables
> 0) {
4443 for (i
= 0; i
< locals
->num_variables
; i
++) {
4444 slang_variable
*v
= locals
->variables
[i
];
4445 printf("undeclare %s at %p\n", (char*) v
->a_name
, v
);
4446 v
->declared
= GL_FALSE
;
4454 * Generate IR tree for a slang_operation (AST node)
4456 static slang_ir_node
*
4457 _slang_gen_operation(slang_assemble_ctx
* A
, slang_operation
*oper
)
4459 switch (oper
->type
) {
4460 case SLANG_OPER_BLOCK_NEW_SCOPE
:
4464 _slang_push_var_table(A
->vartable
);
4466 oper
->type
= SLANG_OPER_BLOCK_NO_NEW_SCOPE
; /* temp change */
4467 n
= _slang_gen_operation(A
, oper
);
4468 oper
->type
= SLANG_OPER_BLOCK_NEW_SCOPE
; /* restore */
4470 _slang_pop_var_table(A
->vartable
);
4472 /*_slang_undeclare_vars(oper->locals);*/
4473 /*print_vars(oper->locals);*/
4476 n
= new_node1(IR_SCOPE
, n
);
4481 case SLANG_OPER_BLOCK_NO_NEW_SCOPE
:
4482 /* list of operations */
4483 if (oper
->num_children
> 0)
4485 slang_ir_node
*n
, *tree
= NULL
;
4488 for (i
= 0; i
< oper
->num_children
; i
++) {
4489 n
= _slang_gen_operation(A
, &oper
->children
[i
]);
4491 _slang_free_ir_tree(tree
);
4492 return NULL
; /* error must have occured */
4494 tree
= new_seq(tree
, n
);
4500 return new_node0(IR_NOP
);
4503 case SLANG_OPER_EXPRESSION
:
4504 return _slang_gen_operation(A
, &oper
->children
[0]);
4506 case SLANG_OPER_FOR
:
4507 return _slang_gen_for(A
, oper
);
4509 return _slang_gen_do(A
, oper
);
4510 case SLANG_OPER_WHILE
:
4511 return _slang_gen_while(A
, oper
);
4512 case SLANG_OPER_BREAK
:
4514 slang_info_log_error(A
->log
, "'break' not in loop");
4517 return new_break(A
->CurLoop
);
4518 case SLANG_OPER_CONTINUE
:
4520 slang_info_log_error(A
->log
, "'continue' not in loop");
4523 return _slang_gen_continue(A
, oper
);
4524 case SLANG_OPER_DISCARD
:
4525 return new_node0(IR_KILL
);
4527 case SLANG_OPER_EQUAL
:
4528 return _slang_gen_compare(A
, oper
, IR_EQUAL
);
4529 case SLANG_OPER_NOTEQUAL
:
4530 return _slang_gen_compare(A
, oper
, IR_NOTEQUAL
);
4531 case SLANG_OPER_GREATER
:
4532 return _slang_gen_compare(A
, oper
, IR_SGT
);
4533 case SLANG_OPER_LESS
:
4534 return _slang_gen_compare(A
, oper
, IR_SLT
);
4535 case SLANG_OPER_GREATEREQUAL
:
4536 return _slang_gen_compare(A
, oper
, IR_SGE
);
4537 case SLANG_OPER_LESSEQUAL
:
4538 return _slang_gen_compare(A
, oper
, IR_SLE
);
4539 case SLANG_OPER_ADD
:
4542 assert(oper
->num_children
== 2);
4543 n
= _slang_gen_function_call_name(A
, "+", oper
, NULL
);
4546 case SLANG_OPER_SUBTRACT
:
4549 assert(oper
->num_children
== 2);
4550 n
= _slang_gen_function_call_name(A
, "-", oper
, NULL
);
4553 case SLANG_OPER_MULTIPLY
:
4556 assert(oper
->num_children
== 2);
4557 n
= _slang_gen_function_call_name(A
, "*", oper
, NULL
);
4560 case SLANG_OPER_DIVIDE
:
4563 assert(oper
->num_children
== 2);
4564 n
= _slang_gen_function_call_name(A
, "/", oper
, NULL
);
4567 case SLANG_OPER_MINUS
:
4570 assert(oper
->num_children
== 1);
4571 n
= _slang_gen_function_call_name(A
, "-", oper
, NULL
);
4574 case SLANG_OPER_PLUS
:
4575 /* +expr --> do nothing */
4576 return _slang_gen_operation(A
, &oper
->children
[0]);
4577 case SLANG_OPER_VARIABLE_DECL
:
4578 return _slang_gen_declaration(A
, oper
);
4579 case SLANG_OPER_ASSIGN
:
4580 return _slang_gen_assignment(A
, oper
);
4581 case SLANG_OPER_ADDASSIGN
:
4584 assert(oper
->num_children
== 2);
4585 n
= _slang_gen_function_call_name(A
, "+=", oper
, NULL
);
4588 case SLANG_OPER_SUBASSIGN
:
4591 assert(oper
->num_children
== 2);
4592 n
= _slang_gen_function_call_name(A
, "-=", oper
, NULL
);
4596 case SLANG_OPER_MULASSIGN
:
4599 assert(oper
->num_children
== 2);
4600 n
= _slang_gen_function_call_name(A
, "*=", oper
, NULL
);
4603 case SLANG_OPER_DIVASSIGN
:
4606 assert(oper
->num_children
== 2);
4607 n
= _slang_gen_function_call_name(A
, "/=", oper
, NULL
);
4610 case SLANG_OPER_LOGICALAND
:
4613 assert(oper
->num_children
== 2);
4614 n
= _slang_gen_logical_and(A
, oper
);
4617 case SLANG_OPER_LOGICALOR
:
4620 assert(oper
->num_children
== 2);
4621 n
= _slang_gen_logical_or(A
, oper
);
4624 case SLANG_OPER_LOGICALXOR
:
4625 return _slang_gen_xor(A
, oper
);
4626 case SLANG_OPER_NOT
:
4627 return _slang_gen_not(A
, oper
);
4628 case SLANG_OPER_SELECT
: /* b ? x : y */
4631 assert(oper
->num_children
== 3);
4632 n
= _slang_gen_select(A
, oper
);
4636 case SLANG_OPER_ASM
:
4637 return _slang_gen_asm(A
, oper
, NULL
);
4638 case SLANG_OPER_CALL
:
4639 return _slang_gen_function_call_name(A
, (const char *) oper
->a_id
,
4641 case SLANG_OPER_METHOD
:
4642 return _slang_gen_method_call(A
, oper
);
4643 case SLANG_OPER_RETURN
:
4644 return _slang_gen_return(A
, oper
);
4645 case SLANG_OPER_LABEL
:
4646 return new_label(oper
->label
);
4647 case SLANG_OPER_IDENTIFIER
:
4648 return _slang_gen_variable(A
, oper
);
4650 return _slang_gen_if(A
, oper
);
4651 case SLANG_OPER_FIELD
:
4652 return _slang_gen_struct_field(A
, oper
);
4653 case SLANG_OPER_SUBSCRIPT
:
4654 return _slang_gen_array_element(A
, oper
);
4655 case SLANG_OPER_LITERAL_FLOAT
:
4657 case SLANG_OPER_LITERAL_INT
:
4659 case SLANG_OPER_LITERAL_BOOL
:
4660 return new_float_literal(oper
->literal
, oper
->literal_size
);
4662 case SLANG_OPER_POSTINCREMENT
: /* var++ */
4665 assert(oper
->num_children
== 1);
4666 n
= _slang_gen_function_call_name(A
, "__postIncr", oper
, NULL
);
4669 case SLANG_OPER_POSTDECREMENT
: /* var-- */
4672 assert(oper
->num_children
== 1);
4673 n
= _slang_gen_function_call_name(A
, "__postDecr", oper
, NULL
);
4676 case SLANG_OPER_PREINCREMENT
: /* ++var */
4679 assert(oper
->num_children
== 1);
4680 n
= _slang_gen_function_call_name(A
, "++", oper
, NULL
);
4683 case SLANG_OPER_PREDECREMENT
: /* --var */
4686 assert(oper
->num_children
== 1);
4687 n
= _slang_gen_function_call_name(A
, "--", oper
, NULL
);
4691 case SLANG_OPER_NON_INLINED_CALL
:
4692 case SLANG_OPER_SEQUENCE
:
4694 slang_ir_node
*tree
= NULL
;
4696 for (i
= 0; i
< oper
->num_children
; i
++) {
4697 slang_ir_node
*n
= _slang_gen_operation(A
, &oper
->children
[i
]);
4698 tree
= new_seq(tree
, n
);
4700 tree
->Store
= n
->Store
;
4702 if (oper
->type
== SLANG_OPER_NON_INLINED_CALL
) {
4703 tree
= new_function_call(tree
, oper
->label
);
4708 case SLANG_OPER_NONE
:
4709 case SLANG_OPER_VOID
:
4710 /* returning NULL here would generate an error */
4711 return new_node0(IR_NOP
);
4714 _mesa_problem(NULL
, "bad node type %d in _slang_gen_operation",
4716 return new_node0(IR_NOP
);
4724 * Check if the given type specifier is a rectangular texture sampler.
4727 is_rect_sampler_spec(const slang_type_specifier
*spec
)
4729 while (spec
->_array
) {
4730 spec
= spec
->_array
;
4732 return spec
->type
== SLANG_SPEC_SAMPLER2DRECT
||
4733 spec
->type
== SLANG_SPEC_SAMPLER2DRECTSHADOW
;
4739 * Called by compiler when a global variable has been parsed/compiled.
4740 * Here we examine the variable's type to determine what kind of register
4741 * storage will be used.
4743 * A uniform such as "gl_Position" will become the register specification
4744 * (PROGRAM_OUTPUT, VERT_RESULT_HPOS). Or, uniform "gl_FogFragCoord"
4745 * will be (PROGRAM_INPUT, FRAG_ATTRIB_FOGC).
4747 * Samplers are interesting. For "uniform sampler2D tex;" we'll specify
4748 * (PROGRAM_SAMPLER, index) where index is resolved at link-time to an
4749 * actual texture unit (as specified by the user calling glUniform1i()).
4752 _slang_codegen_global_variable(slang_assemble_ctx
*A
, slang_variable
*var
,
4753 slang_unit_type type
)
4755 struct gl_program
*prog
= A
->program
;
4756 const char *varName
= (char *) var
->a_name
;
4757 GLboolean success
= GL_TRUE
;
4758 slang_ir_storage
*store
= NULL
;
4760 const GLenum datatype
= _slang_gltype_from_specifier(&var
->type
.specifier
);
4761 const GLint size
= _slang_sizeof_type_specifier(&var
->type
.specifier
);
4762 const GLint arrayLen
= _slang_array_length(var
);
4763 const GLint totalSize
= _slang_array_size(size
, arrayLen
);
4764 GLint texIndex
= sampler_to_texture_index(var
->type
.specifier
.type
);
4766 /* check for sampler2D arrays */
4767 if (texIndex
== -1 && var
->type
.specifier
._array
)
4768 texIndex
= sampler_to_texture_index(var
->type
.specifier
._array
->type
);
4770 if (texIndex
!= -1) {
4771 /* This is a texture sampler variable...
4772 * store->File = PROGRAM_SAMPLER
4773 * store->Index = sampler number (0..7, typically)
4774 * store->Size = texture type index (1D, 2D, 3D, cube, etc)
4776 if (var
->initializer
) {
4777 slang_info_log_error(A
->log
, "illegal assignment to '%s'", varName
);
4780 #if FEATURE_es2_glsl /* XXX should use FEATURE_texture_rect */
4781 /* disallow rect samplers */
4782 if (is_rect_sampler_spec(&var
->type
.specifier
)) {
4783 slang_info_log_error(A
->log
, "invalid sampler type for '%s'", varName
);
4787 (void) is_rect_sampler_spec
; /* silence warning */
4790 GLint sampNum
= _mesa_add_sampler(prog
->Parameters
, varName
, datatype
);
4791 store
= _slang_new_ir_storage_sampler(sampNum
, texIndex
, totalSize
);
4793 /* If we have a sampler array, then we need to allocate the
4794 * additional samplers to ensure we don't allocate them elsewhere.
4795 * We can't directly use _mesa_add_sampler() as that checks the
4796 * varName and gets a match, so we call _mesa_add_parameter()
4797 * directly and use the last sampler number from the call above.
4800 GLint a
= arrayLen
- 1;
4802 for (i
= 0; i
< a
; i
++) {
4803 GLfloat value
= (GLfloat
)(i
+ sampNum
+ 1);
4804 (void) _mesa_add_parameter(prog
->Parameters
, PROGRAM_SAMPLER
,
4805 varName
, 1, datatype
, &value
, NULL
, 0x0);
4809 if (dbg
) printf("SAMPLER ");
4811 else if (var
->type
.qualifier
== SLANG_QUAL_UNIFORM
) {
4812 /* Uniform variable */
4813 const GLuint swizzle
= _slang_var_swizzle(totalSize
, 0);
4816 /* user-defined uniform */
4817 if (datatype
== GL_NONE
) {
4818 if ((var
->type
.specifier
.type
== SLANG_SPEC_ARRAY
&&
4819 var
->type
.specifier
._array
->type
== SLANG_SPEC_STRUCT
) ||
4820 (var
->type
.specifier
.type
== SLANG_SPEC_STRUCT
)) {
4821 /* temporary work-around */
4822 GLenum datatype
= GL_FLOAT
;
4823 GLint uniformLoc
= _mesa_add_uniform(prog
->Parameters
, varName
,
4824 totalSize
, datatype
, NULL
);
4825 store
= _slang_new_ir_storage_swz(PROGRAM_UNIFORM
, uniformLoc
,
4826 totalSize
, swizzle
);
4829 GLint a
= arrayLen
- 1;
4831 for (i
= 0; i
< a
; i
++) {
4832 GLfloat value
= (GLfloat
)(i
+ uniformLoc
+ 1);
4833 (void) _mesa_add_parameter(prog
->Parameters
, PROGRAM_UNIFORM
,
4834 varName
, 1, datatype
, &value
, NULL
, 0x0);
4838 /* XXX what we need to do is unroll the struct into its
4839 * basic types, creating a uniform variable for each.
4847 * Should produce uniforms:
4848 * "f.a" (GL_FLOAT_VEC3)
4849 * "f.b" (GL_FLOAT_VEC4)
4852 if (var
->initializer
) {
4853 slang_info_log_error(A
->log
,
4854 "unsupported initializer for uniform '%s'", varName
);
4859 slang_info_log_error(A
->log
,
4860 "invalid datatype for uniform variable %s",
4866 /* non-struct uniform */
4867 if (!_slang_gen_var_decl(A
, var
, var
->initializer
))
4873 /* pre-defined uniform, like gl_ModelviewMatrix */
4874 /* We know it's a uniform, but don't allocate storage unless
4877 store
= _slang_new_ir_storage_swz(PROGRAM_STATE_VAR
, -1,
4878 totalSize
, swizzle
);
4880 if (dbg
) printf("UNIFORM (sz %d) ", totalSize
);
4882 else if (var
->type
.qualifier
== SLANG_QUAL_VARYING
) {
4883 /* varyings must be float, vec or mat */
4884 if (!_slang_type_is_float_vec_mat(var
->type
.specifier
.type
) &&
4885 var
->type
.specifier
.type
!= SLANG_SPEC_ARRAY
) {
4886 slang_info_log_error(A
->log
,
4887 "varying '%s' must be float/vector/matrix",
4892 if (var
->initializer
) {
4893 slang_info_log_error(A
->log
, "illegal initializer for varying '%s'",
4899 /* user-defined varying */
4905 if (var
->type
.centroid
== SLANG_CENTROID
)
4906 flags
|= PROG_PARAM_BIT_CENTROID
;
4907 if (var
->type
.variant
== SLANG_INVARIANT
)
4908 flags
|= PROG_PARAM_BIT_INVARIANT
;
4910 varyingLoc
= _mesa_add_varying(prog
->Varying
, varName
,
4912 swizzle
= _slang_var_swizzle(size
, 0);
4913 store
= _slang_new_ir_storage_swz(PROGRAM_VARYING
, varyingLoc
,
4914 totalSize
, swizzle
);
4917 /* pre-defined varying, like gl_Color or gl_TexCoord */
4918 if (type
== SLANG_UNIT_FRAGMENT_BUILTIN
) {
4919 /* fragment program input */
4921 GLint index
= _slang_input_index(varName
, GL_FRAGMENT_PROGRAM_ARB
,
4924 assert(index
< FRAG_ATTRIB_MAX
);
4925 store
= _slang_new_ir_storage_swz(PROGRAM_INPUT
, index
,
4929 /* vertex program output */
4930 GLint index
= _slang_output_index(varName
, GL_VERTEX_PROGRAM_ARB
);
4931 GLuint swizzle
= _slang_var_swizzle(size
, 0);
4933 assert(index
< VERT_RESULT_MAX
);
4934 assert(type
== SLANG_UNIT_VERTEX_BUILTIN
);
4935 store
= _slang_new_ir_storage_swz(PROGRAM_OUTPUT
, index
,
4938 if (dbg
) printf("V/F ");
4940 if (dbg
) printf("VARYING ");
4942 else if (var
->type
.qualifier
== SLANG_QUAL_ATTRIBUTE
) {
4945 /* attributes must be float, vec or mat */
4946 if (!_slang_type_is_float_vec_mat(var
->type
.specifier
.type
)) {
4947 slang_info_log_error(A
->log
,
4948 "attribute '%s' must be float/vector/matrix",
4954 /* user-defined vertex attribute */
4955 const GLint attr
= -1; /* unknown */
4956 swizzle
= _slang_var_swizzle(size
, 0);
4957 index
= _mesa_add_attribute(prog
->Attributes
, varName
,
4958 size
, datatype
, attr
);
4960 index
= VERT_ATTRIB_GENERIC0
+ index
;
4963 /* pre-defined vertex attrib */
4964 index
= _slang_input_index(varName
, GL_VERTEX_PROGRAM_ARB
, &swizzle
);
4967 store
= _slang_new_ir_storage_swz(PROGRAM_INPUT
, index
, size
, swizzle
);
4968 if (dbg
) printf("ATTRIB ");
4970 else if (var
->type
.qualifier
== SLANG_QUAL_FIXEDINPUT
) {
4971 GLuint swizzle
= SWIZZLE_XYZW
; /* silence compiler warning */
4972 GLint index
= _slang_input_index(varName
, GL_FRAGMENT_PROGRAM_ARB
,
4974 store
= _slang_new_ir_storage_swz(PROGRAM_INPUT
, index
, size
, swizzle
);
4975 if (dbg
) printf("INPUT ");
4977 else if (var
->type
.qualifier
== SLANG_QUAL_FIXEDOUTPUT
) {
4978 if (type
== SLANG_UNIT_VERTEX_BUILTIN
) {
4979 GLint index
= _slang_output_index(varName
, GL_VERTEX_PROGRAM_ARB
);
4980 store
= _slang_new_ir_storage(PROGRAM_OUTPUT
, index
, size
);
4983 GLint index
= _slang_output_index(varName
, GL_FRAGMENT_PROGRAM_ARB
);
4984 GLint specialSize
= 4; /* treat all fragment outputs as float[4] */
4985 assert(type
== SLANG_UNIT_FRAGMENT_BUILTIN
);
4986 store
= _slang_new_ir_storage(PROGRAM_OUTPUT
, index
, specialSize
);
4988 if (dbg
) printf("OUTPUT ");
4990 else if (var
->type
.qualifier
== SLANG_QUAL_CONST
&& !prog
) {
4991 /* pre-defined global constant, like gl_MaxLights */
4992 store
= _slang_new_ir_storage(PROGRAM_CONSTANT
, -1, size
);
4993 if (dbg
) printf("CONST ");
4996 /* ordinary variable (may be const) */
4999 /* IR node to declare the variable */
5000 n
= _slang_gen_var_decl(A
, var
, var
->initializer
);
5002 /* emit GPU instructions */
5003 success
= _slang_emit_code(n
, A
->vartable
, A
->program
, A
->pragmas
, GL_FALSE
, A
->log
);
5005 _slang_free_ir_tree(n
);
5008 if (dbg
) printf("GLOBAL VAR %s idx %d\n", (char*) var
->a_name
,
5009 store
? store
->Index
: -2);
5012 var
->store
= store
; /* save var's storage info */
5014 var
->declared
= GL_TRUE
;
5021 * Produce an IR tree from a function AST (fun->body).
5022 * Then call the code emitter to convert the IR tree into gl_program
5026 _slang_codegen_function(slang_assemble_ctx
* A
, slang_function
* fun
)
5029 GLboolean success
= GL_TRUE
;
5031 if (_mesa_strcmp((char *) fun
->header
.a_name
, "main") != 0) {
5032 /* we only really generate code for main, all other functions get
5033 * inlined or codegen'd upon an actual call.
5036 /* do some basic error checking though */
5037 if (fun
->header
.type
.specifier
.type
!= SLANG_SPEC_VOID
) {
5038 /* check that non-void functions actually return something */
5040 = _slang_find_node_type(fun
->body
, SLANG_OPER_RETURN
);
5042 slang_info_log_error(A
->log
,
5043 "function \"%s\" has no return statement",
5044 (char *) fun
->header
.a_name
);
5046 "function \"%s\" has no return statement\n",
5047 (char *) fun
->header
.a_name
);
5052 return GL_TRUE
; /* not an error */
5056 printf("\n*********** codegen_function %s\n", (char *) fun
->header
.a_name
);
5057 slang_print_function(fun
, 1);
5060 /* should have been allocated earlier: */
5061 assert(A
->program
->Parameters
);
5062 assert(A
->program
->Varying
);
5063 assert(A
->vartable
);
5065 A
->CurFunction
= fun
;
5067 /* fold constant expressions, etc. */
5068 _slang_simplify(fun
->body
, &A
->space
, A
->atoms
);
5071 printf("\n*********** simplified %s\n", (char *) fun
->header
.a_name
);
5072 slang_print_function(fun
, 1);
5075 /* Create an end-of-function label */
5076 A
->curFuncEndLabel
= _slang_label_new("__endOfFunc__main");
5078 /* push new vartable scope */
5079 _slang_push_var_table(A
->vartable
);
5081 /* Generate IR tree for the function body code */
5082 n
= _slang_gen_operation(A
, fun
->body
);
5084 n
= new_node1(IR_SCOPE
, n
);
5086 /* pop vartable, restore previous */
5087 _slang_pop_var_table(A
->vartable
);
5090 /* XXX record error */
5094 /* append an end-of-function-label to IR tree */
5095 n
= new_seq(n
, new_label(A
->curFuncEndLabel
));
5097 /*_slang_label_delete(A->curFuncEndLabel);*/
5098 A
->curFuncEndLabel
= NULL
;
5101 printf("************* New AST for %s *****\n", (char*)fun
->header
.a_name
);
5102 slang_print_function(fun
, 1);
5105 printf("************* IR for %s *******\n", (char*)fun
->header
.a_name
);
5106 _slang_print_ir_tree(n
, 0);
5109 printf("************* End codegen function ************\n\n");
5112 if (A
->UnresolvedRefs
) {
5113 /* Can't codegen at this time.
5114 * At link time we'll concatenate all the vertex shaders and/or all
5115 * the fragment shaders and try recompiling.
5120 /* Emit program instructions */
5121 success
= _slang_emit_code(n
, A
->vartable
, A
->program
, A
->pragmas
, GL_TRUE
, A
->log
);
5122 _slang_free_ir_tree(n
);
5124 /* free codegen context */
5126 _mesa_free(A->codegen);