src/glsl/ir_builder.h

   1 /*
   2  * Copyright © 2012 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "ir.h"
  25
  26 namespace ir_builder {
  27
  28 #ifndef WRITEMASK_X
  29 enum writemask {
  30    WRITEMASK_X = 0x1,
  31    WRITEMASK_Y = 0x2,
  32    WRITEMASK_Z = 0x4,
  33    WRITEMASK_W = 0x8,
  34 };
  35 #endif
  36
  37 /**
  38  * This little class exists to let the helper expression generators
  39  * take either an ir_rvalue * or an ir_variable * to be automatically
  40  * dereferenced, while still providing compile-time type checking.
  41  *
  42  * You don't have to explicitly call the constructor -- C++ will see
  43  * that you passed an ir_variable, and silently call the
  44  * operand(ir_variable *var) constructor behind your back.
  45  */
  46 class operand {
  47 public:
  48    operand(ir_rvalue *val)
  49       : val(val)
  50    {
  51    }
  52
  53    operand(ir_variable *var)
  54    {
  55       void *mem_ctx = ralloc_parent(var);
  56       val = new(mem_ctx) ir_dereference_variable(var);
  57    }
  58
  59    ir_rvalue *val;
  60 };
  61
  62 /** Automatic generator for ir_dereference_variable on assignment LHS.
  63  *
  64  * \sa operand
  65  */
  66 class deref {
  67 public:
  68    deref(ir_dereference *val)
  69       : val(val)
  70    {
  71    }
  72
  73    deref(ir_variable *var)
  74    {
  75       void *mem_ctx = ralloc_parent(var);
  76       val = new(mem_ctx) ir_dereference_variable(var);
  77    }
  78
  79
  80    ir_dereference *val;
  81 };
  82
  83 class ir_factory {
  84 public:
  85    ir_factory(exec_list *instructions = NULL, void *mem_ctx = NULL)
  86       : instructions(instructions),
  87         mem_ctx(mem_ctx)
  88    {
  89       return;
  90    }
  91
  92    void emit(ir_instruction *ir);
  93    ir_variable *make_temp(const glsl_type *type, const char *name);
  94
  95    ir_constant*
  96    constant(float f)
  97    {
  98       return new(mem_ctx) ir_constant(f);
  99    }
 100
 101    ir_constant*
 102    constant(int i)
 103    {
 104       return new(mem_ctx) ir_constant(i);
 105    }
 106
 107    ir_constant*
 108    constant(unsigned u)
 109    {
 110       return new(mem_ctx) ir_constant(u);
 111    }
 112
 113    ir_constant*
 114    constant(bool b)
 115    {
 116       return new(mem_ctx) ir_constant(b);
 117    }
 118
 119    exec_list *instructions;
 120    void *mem_ctx;
 121 };
 122
 123 ir_assignment *assign(deref lhs, operand rhs);
 124 ir_assignment *assign(deref lhs, operand rhs, int writemask);
 125 ir_assignment *assign(deref lhs, operand rhs, operand condition);
 126 ir_assignment *assign(deref lhs, operand rhs, operand condition, int writemask);
 127
 128 ir_return *ret(operand retval);
 129
 130 ir_expression *expr(ir_expression_operation op, operand a);
 131 ir_expression *expr(ir_expression_operation op, operand a, operand b);
 132 ir_expression *expr(ir_expression_operation op, operand a, operand b, operand c);
 133 ir_expression *add(operand a, operand b);
 134 ir_expression *sub(operand a, operand b);
 135 ir_expression *mul(operand a, operand b);
 136 ir_expression *imul_high(operand a, operand b);
 137 ir_expression *div(operand a, operand b);
 138 ir_expression *carry(operand a, operand b);
 139 ir_expression *borrow(operand a, operand b);
 140 ir_expression *trunc(operand a);
 141 ir_expression *round_even(operand a);
 142 ir_expression *fract(operand a);
 143 ir_expression *dot(operand a, operand b);
 144 ir_expression *clamp(operand a, operand b, operand c);
 145 ir_expression *saturate(operand a);
 146 ir_expression *abs(operand a);
 147 ir_expression *neg(operand a);
 148 ir_expression *sin(operand a);
 149 ir_expression *cos(operand a);
 150 ir_expression *exp(operand a);
 151 ir_expression *rsq(operand a);
 152 ir_expression *sqrt(operand a);
 153 ir_expression *log(operand a);
 154 ir_expression *sign(operand a);
 155
 156 ir_expression *subr_to_int(operand a);
 157 ir_expression *equal(operand a, operand b);
 158 ir_expression *nequal(operand a, operand b);
 159 ir_expression *less(operand a, operand b);
 160 ir_expression *greater(operand a, operand b);
 161 ir_expression *lequal(operand a, operand b);
 162 ir_expression *gequal(operand a, operand b);
 163
 164 ir_expression *logic_not(operand a);
 165 ir_expression *logic_and(operand a, operand b);
 166 ir_expression *logic_or(operand a, operand b);
 167
 168 ir_expression *bit_not(operand a);
 169 ir_expression *bit_or(operand a, operand b);
 170 ir_expression *bit_and(operand a, operand b);
 171 ir_expression *lshift(operand a, operand b);
 172 ir_expression *rshift(operand a, operand b);
 173
 174 ir_expression *f2i(operand a);
 175 ir_expression *bitcast_f2i(operand a);
 176 ir_expression *i2f(operand a);
 177 ir_expression *bitcast_i2f(operand a);
 178 ir_expression *f2u(operand a);
 179 ir_expression *bitcast_f2u(operand a);
 180 ir_expression *u2f(operand a);
 181 ir_expression *bitcast_u2f(operand a);
 182 ir_expression *i2u(operand a);
 183 ir_expression *u2i(operand a);
 184 ir_expression *b2i(operand a);
 185 ir_expression *i2b(operand a);
 186 ir_expression *f2b(operand a);
 187 ir_expression *b2f(operand a);
 188
 189 ir_expression *f2d(operand a);
 190 ir_expression *i2d(operand a);
 191 ir_expression *u2d(operand a);
 192
 193 ir_expression *min2(operand a, operand b);
 194 ir_expression *max2(operand a, operand b);
 195
 196 ir_expression *interpolate_at_centroid(operand a);
 197 ir_expression *interpolate_at_offset(operand a, operand b);
 198 ir_expression *interpolate_at_sample(operand a, operand b);
 199
 200 ir_expression *fma(operand a, operand b, operand c);
 201 ir_expression *lrp(operand x, operand y, operand a);
 202 ir_expression *csel(operand a, operand b, operand c);
 203 ir_expression *bitfield_extract(operand a, operand b, operand c);
 204 ir_expression *bitfield_insert(operand a, operand b, operand c, operand d);
 205
 206 ir_swizzle *swizzle(operand a, int swizzle, int components);
 207 /**
 208  * Swizzle away later components, but preserve the ordering.
 209  */
 210 ir_swizzle *swizzle_for_size(operand a, unsigned components);
 211
 212 ir_swizzle *swizzle_xxxx(operand a);
 213 ir_swizzle *swizzle_yyyy(operand a);
 214 ir_swizzle *swizzle_zzzz(operand a);
 215 ir_swizzle *swizzle_wwww(operand a);
 216 ir_swizzle *swizzle_x(operand a);
 217 ir_swizzle *swizzle_y(operand a);
 218 ir_swizzle *swizzle_z(operand a);
 219 ir_swizzle *swizzle_w(operand a);
 220 ir_swizzle *swizzle_xy(operand a);
 221 ir_swizzle *swizzle_xyz(operand a);
 222 ir_swizzle *swizzle_xyzw(operand a);
 223
 224 ir_if *if_tree(operand condition,
 225                ir_instruction *then_branch);
 226 ir_if *if_tree(operand condition,
 227                ir_instruction *then_branch,
 228                ir_instruction *else_branch);
 229
 230 } /* namespace ir_builder */