3 # Copyright (C) 2014 Connor Abbott
5 # Permission is hereby granted, free of charge, to any person obtaining a
6 # copy of this software and associated documentation files (the "Software"),
7 # to deal in the Software without restriction, including without limitation
8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 # and/or sell copies of the Software, and to permit persons to whom the
10 # Software is furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice (including the next
13 # paragraph) shall be included in all copies or substantial portions of the
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 # Connor Abbott (cwabbott0@gmail.com)
28 # Class that represents all the information we have about the opcode
29 # NOTE: this must be kept in sync with nir_op_info
32 """Class that represents all the information we have about the opcode
33 NOTE: this must be kept in sync with nir_op_info
35 def __init__(self
, name
, output_size
, output_type
, input_sizes
,
36 input_types
, algebraic_properties
, const_expr
):
39 - name is the name of the opcode (prepend nir_op_ for the enum name)
40 - all types are strings that get nir_type_ prepended to them
41 - input_types is a list of types
42 - algebraic_properties is a space-seperated string, where nir_op_is_ is
43 prepended before each entry
44 - const_expr is an expression or series of statements that computes the
45 constant value of the opcode given the constant values of its inputs.
47 Constant expressions are formed from the variables src0, src1, ...,
48 src(N-1), where N is the number of arguments. The output of the
49 expression should be stored in the dst variable. Per-component input
50 and output variables will be scalars and non-per-component input and
51 output variables will be a struct with fields named x, y, z, and w
52 all of the correct type. Input and output variables can be assumed
53 to already be of the correct type and need no conversion. In
54 particular, the conversion from the C bool type to/from NIR_TRUE and
55 NIR_FALSE happens automatically.
57 For per-component instructions, the entire expression will be
58 executed once for each component. For non-per-component
59 instructions, the expression is expected to store the correct values
60 in dst.x, dst.y, etc. If "dst" does not exist anywhere in the
61 constant expression, an assignment to dst will happen automatically
62 and the result will be equivalent to "dst = <expression>" for
63 per-component instructions and "dst.x = dst.y = ... = <expression>"
64 for non-per-component instructions.
66 assert isinstance(name
, str)
67 assert isinstance(output_size
, int)
68 assert isinstance(output_type
, str)
69 assert isinstance(input_sizes
, list)
70 assert isinstance(input_sizes
[0], int)
71 assert isinstance(input_types
, list)
72 assert isinstance(input_types
[0], str)
73 assert isinstance(algebraic_properties
, str)
74 assert isinstance(const_expr
, str)
75 assert len(input_sizes
) == len(input_types
)
76 assert 0 <= output_size
<= 4
77 for size
in input_sizes
:
82 self
.num_inputs
= len(input_sizes
)
83 self
.output_size
= output_size
84 self
.output_type
= output_type
85 self
.input_sizes
= input_sizes
86 self
.input_types
= input_types
87 self
.algebraic_properties
= algebraic_properties
88 self
.const_expr
= const_expr
90 # helper variables for strings
101 commutative
= "commutative "
102 associative
= "associative "
104 # global dictionary of opcodes
107 def opcode(name
, output_size
, output_type
, input_sizes
, input_types
,
108 algebraic_properties
, const_expr
):
109 assert name
not in opcodes
110 opcodes
[name
] = Opcode(name
, output_size
, output_type
, input_sizes
,
111 input_types
, algebraic_properties
, const_expr
)
113 def unop_convert(name
, out_type
, in_type
, const_expr
):
114 opcode(name
, 0, out_type
, [0], [in_type
], "", const_expr
)
116 def unop(name
, ty
, const_expr
):
117 opcode(name
, 0, ty
, [0], [ty
], "", const_expr
)
119 def unop_horiz(name
, output_size
, output_type
, input_size
, input_type
,
121 opcode(name
, output_size
, output_type
, [input_size
], [input_type
], "",
124 def unop_reduce(name
, output_size
, output_type
, input_type
, prereduce_expr
,
125 reduce_expr
, final_expr
):
127 return "(" + prereduce_expr
.format(src
=src
) + ")"
129 return final_expr
.format(src
="(" + src
+ ")")
130 def reduce_(src0
, src1
):
131 return reduce_expr
.format(src0
=src0
, src1
=src1
)
132 src0
= prereduce("src0.x")
133 src1
= prereduce("src0.y")
134 src2
= prereduce("src0.z")
135 src3
= prereduce("src0.w")
136 unop_horiz(name
+ "2", output_size
, output_type
, 2, input_type
,
137 final(reduce_(src0
, src1
)))
138 unop_horiz(name
+ "3", output_size
, output_type
, 3, input_type
,
139 final(reduce_(reduce_(src0
, src1
), src2
)))
140 unop_horiz(name
+ "4", output_size
, output_type
, 4, input_type
,
141 final(reduce_(reduce_(src0
, src1
), reduce_(src2
, src3
))))
144 # These two move instructions differ in what modifiers they support and what
145 # the negate modifier means. Otherwise, they are identical.
146 unop("fmov", tfloat
, "src0")
147 unop("imov", tint
, "src0")
149 unop("ineg", tint
, "-src0")
150 unop("fneg", tfloat
, "-src0")
151 unop("inot", tint
, "~src0") # invert every bit of the integer
152 unop("fnot", tfloat
, "(src0 == 0.0f) ? 1.0f : 0.0f")
153 unop("fsign", tfloat
, "(src0 == 0.0f) ? 0.0f : ((src0 > 0.0f) ? 1.0f : -1.0f)")
154 unop("isign", tint
, "(src0 == 0) ? 0 : ((src0 > 0) ? 1 : -1)")
155 unop("iabs", tint
, "(src0 < 0) ? -src0 : src0")
156 unop("fabs", tfloat
, "fabsf(src0)")
157 unop("fsat", tfloat
, "(src0 > 1.0f) ? 1.0f : ((src0 <= 0.0f) ? 0.0f : src0)")
158 unop("frcp", tfloat
, "1.0f / src0")
159 unop("frsq", tfloat
, "1.0f / sqrtf(src0)")
160 unop("fsqrt", tfloat
, "sqrtf(src0)")
161 unop("fexp2", tfloat
, "exp2f(src0)")
162 unop("flog2", tfloat
, "log2f(src0)")
163 unop_convert("f2i", tint32
, tfloat32
, "src0") # Float-to-integer conversion.
164 unop_convert("f2u", tuint32
, tfloat32
, "src0") # Float-to-unsigned conversion
165 unop_convert("d2i", tint32
, tfloat64
, "src0") # Double-to-integer conversion.
166 unop_convert("d2u", tuint32
, tfloat64
, "src0") # Double-to-unsigned conversion.
167 unop_convert("i2f", tfloat32
, tint32
, "src0") # Integer-to-float conversion.
168 unop_convert("i2d", tfloat64
, tint32
, "src0") # Integer-to-double conversion.
169 # Float-to-boolean conversion
170 unop_convert("f2b", tbool
, tfloat32
, "src0 != 0.0f")
171 unop_convert("d2b", tbool
, tfloat64
, "src0 != 0.0")
172 # Boolean-to-float conversion
173 unop_convert("b2f", tfloat32
, tbool
, "src0 ? 1.0f : 0.0f")
174 # Int-to-boolean conversion
175 unop_convert("i2b", tbool
, tint32
, "src0 != 0")
176 unop_convert("b2i", tint32
, tbool
, "src0 ? 1 : 0") # Boolean-to-int conversion
177 unop_convert("u2f", tfloat32
, tuint32
, "src0") # Unsigned-to-float conversion.
178 unop_convert("u2d", tfloat64
, tuint32
, "src0") # Unsigned-to-double conversion.
179 # double-to-float conversion
180 unop_convert("d2f", tfloat32
, tfloat64
, "src0") # Single to double precision
181 unop_convert("f2d", tfloat64
, tfloat32
, "src0") # Double to single precision
183 # Unary floating-point rounding operations.
186 unop("ftrunc", tfloat
, "bit_size == 64 ? trunc(src0) : truncf(src0)")
187 unop("fceil", tfloat
, "bit_size == 64 ? ceil(src0) : ceilf(src0)")
188 unop("ffloor", tfloat
, "bit_size == 64 ? floor(src0) : floorf(src0)")
189 unop("ffract", tfloat
, "src0 - (bit_size == 64 ? floor(src0) : floorf(src0))")
190 unop("fround_even", tfloat
, "bit_size == 64 ? _mesa_roundeven(src0) : _mesa_roundevenf(src0)")
192 unop("fquantize2f16", tfloat
, "(fabs(src0) < ldexpf(1.0, -14)) ? copysignf(0.0f, src0) : _mesa_half_to_float(_mesa_float_to_half(src0))")
194 # Trigonometric operations.
197 unop("fsin", tfloat
, "bit_size == 64 ? sin(src0) : sinf(src0)")
198 unop("fcos", tfloat
, "bit_size == 64 ? cos(src0) : cosf(src0)")
201 # Partial derivatives.
204 unop("fddx", tfloat
, "0.0") # the derivative of a constant is 0.
205 unop("fddy", tfloat
, "0.0")
206 unop("fddx_fine", tfloat
, "0.0")
207 unop("fddy_fine", tfloat
, "0.0")
208 unop("fddx_coarse", tfloat
, "0.0")
209 unop("fddy_coarse", tfloat
, "0.0")
212 # Floating point pack and unpack operations.
215 unop_horiz("pack_" + fmt
+ "_2x16", 1, tuint32
, 2, tfloat32
, """
216 dst.x = (uint32_t) pack_fmt_1x16(src0.x);
217 dst.x |= ((uint32_t) pack_fmt_1x16(src0.y)) << 16;
218 """.replace("fmt", fmt
))
221 unop_horiz("pack_" + fmt
+ "_4x8", 1, tuint32
, 4, tfloat32
, """
222 dst.x = (uint32_t) pack_fmt_1x8(src0.x);
223 dst.x |= ((uint32_t) pack_fmt_1x8(src0.y)) << 8;
224 dst.x |= ((uint32_t) pack_fmt_1x8(src0.z)) << 16;
225 dst.x |= ((uint32_t) pack_fmt_1x8(src0.w)) << 24;
226 """.replace("fmt", fmt
))
228 def unpack_2x16(fmt
):
229 unop_horiz("unpack_" + fmt
+ "_2x16", 2, tfloat32
, 1, tuint32
, """
230 dst.x = unpack_fmt_1x16((uint16_t)(src0.x & 0xffff));
231 dst.y = unpack_fmt_1x16((uint16_t)(src0.x << 16));
232 """.replace("fmt", fmt
))
235 unop_horiz("unpack_" + fmt
+ "_4x8", 4, tfloat32
, 1, tuint32
, """
236 dst.x = unpack_fmt_1x8((uint8_t)(src0.x & 0xff));
237 dst.y = unpack_fmt_1x8((uint8_t)((src0.x >> 8) & 0xff));
238 dst.z = unpack_fmt_1x8((uint8_t)((src0.x >> 16) & 0xff));
239 dst.w = unpack_fmt_1x8((uint8_t)(src0.x >> 24));
240 """.replace("fmt", fmt
))
254 unop_horiz("pack_uvec2_to_uint", 1, tuint32
, 2, tuint32
, """
255 dst.x = (src0.x & 0xffff) | (src0.y >> 16);
258 unop_horiz("pack_uvec4_to_uint", 1, tuint32
, 4, tuint32
, """
259 dst.x = (src0.x << 0) |
265 unop_horiz("pack_double_2x32", 1, tuint64
, 2, tuint32
, """
279 unop_horiz("unpack_double_2x32", 2, tuint32
, 1, tuint64
, """
293 # Lowered floating point unpacking operations.
296 unop_horiz("unpack_half_2x16_split_x", 1, tfloat32
, 1, tuint32
,
297 "unpack_half_1x16((uint16_t)(src0.x & 0xffff))")
298 unop_horiz("unpack_half_2x16_split_y", 1, tfloat32
, 1, tuint32
,
299 "unpack_half_1x16((uint16_t)(src0.x >> 16))")
301 unop_convert("unpack_double_2x32_split_x", tuint32
, tuint64
, """
313 unop_convert("unpack_double_2x32_split_y", tuint32
, tuint64
, """
325 # Bit operations, part of ARB_gpu_shader5.
328 unop("bitfield_reverse", tuint32
, """
329 /* we're not winning any awards for speed here, but that's ok */
331 for (unsigned bit = 0; bit < 32; bit++)
332 dst |= ((src0 >> bit) & 1) << (31 - bit);
334 unop("bit_count", tuint32
, """
336 for (unsigned bit = 0; bit < 32; bit++) {
337 if ((src0 >> bit) & 1)
342 unop_convert("ufind_msb", tint32
, tuint32
, """
344 for (int bit = 31; bit > 0; bit--) {
345 if ((src0 >> bit) & 1) {
352 unop("ifind_msb", tint32
, """
354 for (int bit = 31; bit >= 0; bit--) {
355 /* If src0 < 0, we're looking for the first 0 bit.
356 * if src0 >= 0, we're looking for the first 1 bit.
358 if ((((src0 >> bit) & 1) && (src0 >= 0)) ||
359 (!((src0 >> bit) & 1) && (src0 < 0))) {
366 unop("find_lsb", tint32
, """
368 for (unsigned bit = 0; bit < 32; bit++) {
369 if ((src0 >> bit) & 1) {
377 for i
in xrange(1, 5):
378 for j
in xrange(1, 5):
379 unop_horiz("fnoise{0}_{1}".format(i
, j
), i
, tfloat
, j
, tfloat
, "0.0f")
381 def binop_convert(name
, out_type
, in_type
, alg_props
, const_expr
):
382 opcode(name
, 0, out_type
, [0, 0], [in_type
, in_type
], alg_props
, const_expr
)
384 def binop(name
, ty
, alg_props
, const_expr
):
385 binop_convert(name
, ty
, ty
, alg_props
, const_expr
)
387 def binop_compare(name
, ty
, alg_props
, const_expr
):
388 binop_convert(name
, tbool
, ty
, alg_props
, const_expr
)
390 def binop_horiz(name
, out_size
, out_type
, src1_size
, src1_type
, src2_size
,
391 src2_type
, const_expr
):
392 opcode(name
, out_size
, out_type
, [src1_size
, src2_size
], [src1_type
, src2_type
],
395 def binop_reduce(name
, output_size
, output_type
, src_type
, prereduce_expr
,
396 reduce_expr
, final_expr
):
398 return final_expr
.format(src
= "(" + src
+ ")")
399 def reduce_(src0
, src1
):
400 return reduce_expr
.format(src0
=src0
, src1
=src1
)
401 def prereduce(src0
, src1
):
402 return "(" + prereduce_expr
.format(src0
=src0
, src1
=src1
) + ")"
403 src0
= prereduce("src0.x", "src1.x")
404 src1
= prereduce("src0.y", "src1.y")
405 src2
= prereduce("src0.z", "src1.z")
406 src3
= prereduce("src0.w", "src1.w")
407 opcode(name
+ "2", output_size
, output_type
,
408 [2, 2], [src_type
, src_type
], commutative
,
409 final(reduce_(src0
, src1
)))
410 opcode(name
+ "3", output_size
, output_type
,
411 [3, 3], [src_type
, src_type
], commutative
,
412 final(reduce_(reduce_(src0
, src1
), src2
)))
413 opcode(name
+ "4", output_size
, output_type
,
414 [4, 4], [src_type
, src_type
], commutative
,
415 final(reduce_(reduce_(src0
, src1
), reduce_(src2
, src3
))))
417 binop("fadd", tfloat
, commutative
+ associative
, "src0 + src1")
418 binop("iadd", tint
, commutative
+ associative
, "src0 + src1")
419 binop("fsub", tfloat
, "", "src0 - src1")
420 binop("isub", tint
, "", "src0 - src1")
422 binop("fmul", tfloat
, commutative
+ associative
, "src0 * src1")
423 # low 32-bits of signed/unsigned integer multiply
424 binop("imul", tint
, commutative
+ associative
, "src0 * src1")
425 # high 32-bits of signed integer multiply
426 binop("imul_high", tint32
, commutative
,
427 "(int32_t)(((int64_t) src0 * (int64_t) src1) >> 32)")
428 # high 32-bits of unsigned integer multiply
429 binop("umul_high", tuint32
, commutative
,
430 "(uint32_t)(((uint64_t) src0 * (uint64_t) src1) >> 32)")
432 binop("fdiv", tfloat
, "", "src0 / src1")
433 binop("idiv", tint
, "", "src0 / src1")
434 binop("udiv", tuint
, "", "src0 / src1")
436 # returns a boolean representing the carry resulting from the addition of
437 # the two unsigned arguments.
439 binop_convert("uadd_carry", tuint
, tuint
, commutative
, "src0 + src1 < src0")
441 # returns a boolean representing the borrow resulting from the subtraction
442 # of the two unsigned arguments.
444 binop_convert("usub_borrow", tuint
, tuint
, "", "src0 < src1")
446 binop("umod", tuint
, "", "src1 == 0 ? 0 : src0 % src1")
448 # For signed integers, there are several different possible definitions of
449 # "modulus" or "remainder". We follow the conventions used by LLVM and
450 # SPIR-V. The irem opcode implements the standard C/C++ signed "%"
451 # operation while the imod opcode implements the more mathematical
452 # "modulus" operation. For details on the difference, see
454 # http://mathforum.org/library/drmath/view/52343.html
456 binop("irem", tint
, "", "src1 == 0 ? 0 : src0 % src1")
457 binop("imod", tint
, "",
458 "src1 == 0 ? 0 : ((src0 % src1 == 0 || (src0 >= 0) == (src1 >= 0)) ?"
459 " src0 % src1 : src0 % src1 + src1)")
460 binop("fmod", tfloat
, "", "src0 - src1 * floorf(src0 / src1)")
461 binop("frem", tfloat
, "", "src0 - src1 * truncf(src0 / src1)")
468 # these integer-aware comparisons return a boolean (0 or ~0)
470 binop_compare("flt", tfloat
, "", "src0 < src1")
471 binop_compare("fge", tfloat
, "", "src0 >= src1")
472 binop_compare("feq", tfloat
, commutative
, "src0 == src1")
473 binop_compare("fne", tfloat
, commutative
, "src0 != src1")
474 binop_compare("ilt", tint
, "", "src0 < src1")
475 binop_compare("ige", tint
, "", "src0 >= src1")
476 binop_compare("ieq", tint
, commutative
, "src0 == src1")
477 binop_compare("ine", tint
, commutative
, "src0 != src1")
478 binop_compare("ult", tuint
, "", "src0 < src1")
479 binop_compare("uge", tuint
, "", "src0 >= src1")
481 # integer-aware GLSL-style comparisons that compare floats and ints
483 binop_reduce("ball_fequal", 1, tbool
, tfloat
, "{src0} == {src1}",
484 "{src0} && {src1}", "{src}")
485 binop_reduce("bany_fnequal", 1, tbool
, tfloat
, "{src0} != {src1}",
486 "{src0} || {src1}", "{src}")
487 binop_reduce("ball_iequal", 1, tbool
, tint
, "{src0} == {src1}",
488 "{src0} && {src1}", "{src}")
489 binop_reduce("bany_inequal", 1, tbool
, tint
, "{src0} != {src1}",
490 "{src0} || {src1}", "{src}")
492 # non-integer-aware GLSL-style comparisons that return 0.0 or 1.0
494 binop_reduce("fall_equal", 1, tfloat32
, tfloat32
, "{src0} == {src1}",
495 "{src0} && {src1}", "{src} ? 1.0f : 0.0f")
496 binop_reduce("fany_nequal", 1, tfloat32
, tfloat32
, "{src0} != {src1}",
497 "{src0} || {src1}", "{src} ? 1.0f : 0.0f")
499 # These comparisons for integer-less hardware return 1.0 and 0.0 for true
500 # and false respectively
502 binop("slt", tfloat32
, "", "(src0 < src1) ? 1.0f : 0.0f") # Set on Less Than
503 binop("sge", tfloat32
, "", "(src0 >= src1) ? 1.0f : 0.0f") # Set on Greater or Equal
504 binop("seq", tfloat32
, commutative
, "(src0 == src1) ? 1.0f : 0.0f") # Set on Equal
505 binop("sne", tfloat32
, commutative
, "(src0 != src1) ? 1.0f : 0.0f") # Set on Not Equal
508 binop("ishl", tint
, "", "src0 << src1")
509 binop("ishr", tint
, "", "src0 >> src1")
510 binop("ushr", tuint
, "", "src0 >> src1")
512 # bitwise logic operators
514 # These are also used as boolean and, or, xor for hardware supporting
518 binop("iand", tuint
, commutative
+ associative
, "src0 & src1")
519 binop("ior", tuint
, commutative
+ associative
, "src0 | src1")
520 binop("ixor", tuint
, commutative
+ associative
, "src0 ^ src1")
523 # floating point logic operators
525 # These use (src != 0.0) for testing the truth of the input, and output 1.0
526 # for true and 0.0 for false
528 binop("fand", tfloat32
, commutative
,
529 "((src0 != 0.0f) && (src1 != 0.0f)) ? 1.0f : 0.0f")
530 binop("for", tfloat32
, commutative
,
531 "((src0 != 0.0f) || (src1 != 0.0f)) ? 1.0f : 0.0f")
532 binop("fxor", tfloat32
, commutative
,
533 "(src0 != 0.0f && src1 == 0.0f) || (src0 == 0.0f && src1 != 0.0f) ? 1.0f : 0.0f")
535 binop_reduce("fdot", 1, tfloat
, tfloat
, "{src0} * {src1}", "{src0} + {src1}",
538 binop_reduce("fdot_replicated", 4, tfloat
, tfloat
,
539 "{src0} * {src1}", "{src0} + {src1}", "{src}")
541 opcode("fdph", 1, tfloat
, [3, 4], [tfloat
, tfloat
], "",
542 "src0.x * src1.x + src0.y * src1.y + src0.z * src1.z + src1.w")
543 opcode("fdph_replicated", 4, tfloat
, [3, 4], [tfloat
, tfloat
], "",
544 "src0.x * src1.x + src0.y * src1.y + src0.z * src1.z + src1.w")
546 binop("fmin", tfloat
, "", "fminf(src0, src1)")
547 binop("imin", tint
, commutative
+ associative
, "src1 > src0 ? src0 : src1")
548 binop("umin", tuint
, commutative
+ associative
, "src1 > src0 ? src0 : src1")
549 binop("fmax", tfloat
, "", "fmaxf(src0, src1)")
550 binop("imax", tint
, commutative
+ associative
, "src1 > src0 ? src1 : src0")
551 binop("umax", tuint
, commutative
+ associative
, "src1 > src0 ? src1 : src0")
553 # Saturated vector add for 4 8bit ints.
554 binop("usadd_4x8", tint32
, commutative
+ associative
, """
556 for (int i = 0; i < 32; i += 8) {
557 dst |= MIN2(((src0 >> i) & 0xff) + ((src1 >> i) & 0xff), 0xff) << i;
561 # Saturated vector subtract for 4 8bit ints.
562 binop("ussub_4x8", tint32
, "", """
564 for (int i = 0; i < 32; i += 8) {
565 int src0_chan = (src0 >> i) & 0xff;
566 int src1_chan = (src1 >> i) & 0xff;
567 if (src0_chan > src1_chan)
568 dst |= (src0_chan - src1_chan) << i;
572 # vector min for 4 8bit ints.
573 binop("umin_4x8", tint32
, commutative
+ associative
, """
575 for (int i = 0; i < 32; i += 8) {
576 dst |= MIN2((src0 >> i) & 0xff, (src1 >> i) & 0xff) << i;
580 # vector max for 4 8bit ints.
581 binop("umax_4x8", tint32
, commutative
+ associative
, """
583 for (int i = 0; i < 32; i += 8) {
584 dst |= MAX2((src0 >> i) & 0xff, (src1 >> i) & 0xff) << i;
588 # unorm multiply: (a * b) / 255.
589 binop("umul_unorm_4x8", tint32
, commutative
+ associative
, """
591 for (int i = 0; i < 32; i += 8) {
592 int src0_chan = (src0 >> i) & 0xff;
593 int src1_chan = (src1 >> i) & 0xff;
594 dst |= ((src0_chan * src1_chan) / 255) << i;
598 binop("fpow", tfloat
, "", "bit_size == 64 ? powf(src0, src1) : pow(src0, src1)")
600 binop_horiz("pack_half_2x16_split", 1, tuint32
, 1, tfloat32
, 1, tfloat32
,
601 "pack_half_1x16(src0.x) | (pack_half_1x16(src1.x) << 16)")
603 binop_convert("pack_double_2x32_split", tuint64
, tuint32
, "", """
616 # bfm implements the behavior of the first operation of the SM5 "bfi" assembly
617 # and that of the "bfi1" i965 instruction. That is, it has undefined behavior
618 # if either of its arguments are 32.
619 binop_convert("bfm", tuint32
, tint32
, "", """
620 int bits = src0, offset = src1;
621 if (offset < 0 || bits < 0 || offset > 31 || bits > 31 || offset + bits > 32)
622 dst = 0; /* undefined */
624 dst = ((1u << bits) - 1) << offset;
627 opcode("ldexp", 0, tfloat
, [0, 0], [tfloat
, tint
], "", """
628 dst = (bit_size == 64) ? ldexp(src0, src1) : ldexpf(src0, src1);
629 /* flush denormals to zero. */
631 dst = copysignf(0.0f, src0);
634 # Combines the first component of each input to make a 2-component vector.
636 binop_horiz("vec2", 2, tuint
, 1, tuint
, 1, tuint
, """
642 binop("extract_u8", tuint
, "", "(uint8_t)(src0 >> (src1 * 8))")
643 binop("extract_i8", tint
, "", "(int8_t)(src0 >> (src1 * 8))")
646 binop("extract_u16", tuint
, "", "(uint16_t)(src0 >> (src1 * 16))")
647 binop("extract_i16", tint
, "", "(int16_t)(src0 >> (src1 * 16))")
650 def triop(name
, ty
, const_expr
):
651 opcode(name
, 0, ty
, [0, 0, 0], [ty
, ty
, ty
], "", const_expr
)
652 def triop_horiz(name
, output_size
, src1_size
, src2_size
, src3_size
, const_expr
):
653 opcode(name
, output_size
, tuint
,
654 [src1_size
, src2_size
, src3_size
],
655 [tuint
, tuint
, tuint
], "", const_expr
)
657 triop("ffma", tfloat
, "src0 * src1 + src2")
659 triop("flrp", tfloat
, "src0 * (1 - src2) + src1 * src2")
663 # A vector conditional select instruction (like ?:, but operating per-
664 # component on vectors). There are two versions, one for floating point
665 # bools (0.0 vs 1.0) and one for integer bools (0 vs ~0).
668 triop("fcsel", tfloat32
, "(src0 != 0.0f) ? src1 : src2")
669 opcode("bcsel", 0, tuint
, [0, 0, 0],
670 [tbool
, tuint
, tuint
], "", "src0 ? src1 : src2")
673 triop("bfi", tuint32
, """
674 unsigned mask = src0, insert = src1, base = src2;
683 dst = (base & ~mask) | (insert & mask);
687 # SM5 ubfe/ibfe assembly
688 opcode("ubfe", 0, tuint32
,
689 [0, 0, 0], [tuint32
, tint32
, tint32
], "", """
690 unsigned base = src0;
691 int offset = src1, bits = src2;
694 } else if (bits < 0 || offset < 0) {
695 dst = 0; /* undefined */
696 } else if (offset + bits < 32) {
697 dst = (base << (32 - bits - offset)) >> (32 - bits);
699 dst = base >> offset;
702 opcode("ibfe", 0, tint32
,
703 [0, 0, 0], [tint32
, tint32
, tint32
], "", """
705 int offset = src1, bits = src2;
708 } else if (bits < 0 || offset < 0) {
709 dst = 0; /* undefined */
710 } else if (offset + bits < 32) {
711 dst = (base << (32 - bits - offset)) >> (32 - bits);
713 dst = base >> offset;
717 # GLSL bitfieldExtract()
718 opcode("ubitfield_extract", 0, tuint32
,
719 [0, 0, 0], [tuint32
, tint32
, tint32
], "", """
720 unsigned base = src0;
721 int offset = src1, bits = src2;
724 } else if (bits < 0 || offset < 0 || offset + bits > 32) {
725 dst = 0; /* undefined per the spec */
727 dst = (base >> offset) & ((1ull << bits) - 1);
730 opcode("ibitfield_extract", 0, tint32
,
731 [0, 0, 0], [tint32
, tint32
, tint32
], "", """
733 int offset = src1, bits = src2;
736 } else if (offset < 0 || bits < 0 || offset + bits > 32) {
739 dst = (base << (32 - offset - bits)) >> offset; /* use sign-extending shift */
743 # Combines the first component of each input to make a 3-component vector.
745 triop_horiz("vec3", 3, 1, 1, 1, """
751 def quadop_horiz(name
, output_size
, src1_size
, src2_size
, src3_size
,
752 src4_size
, const_expr
):
753 opcode(name
, output_size
, tuint
,
754 [src1_size
, src2_size
, src3_size
, src4_size
],
755 [tuint
, tuint
, tuint
, tuint
],
758 opcode("bitfield_insert", 0, tuint32
, [0, 0, 0, 0],
759 [tuint32
, tuint32
, tint32
, tint32
], "", """
760 unsigned base = src0, insert = src1;
761 int offset = src2, bits = src3;
764 } else if (offset < 0 || bits < 0 || bits + offset > 32) {
767 unsigned mask = ((1ull << bits) - 1) << offset;
768 dst = (base & ~mask) | ((insert << bits) & mask);
772 quadop_horiz("vec4", 4, 1, 1, 1, 1, """