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Diffstat (limited to 'src/glsl/ir_equals.cpp')
| -rw-r--r-- | src/glsl/ir_equals.cpp | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/glsl/ir_equals.cpp b/src/glsl/ir_equals.cpp new file mode 100644 index 00000000000..7cfe1e66ba8 --- /dev/null +++ b/src/glsl/ir_equals.cpp @@ -0,0 +1,198 @@ +/* + * Copyright © 2013 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "ir.h" + +/** + * Helper for checking equality when one instruction might be NULL, since you + * can't access a's vtable in that case. + */ +static bool +possibly_null_equals(ir_instruction *a, ir_instruction *b) +{ + if (!a || !b) + return !a && !b; + + return a->equals(b); +} + +/** + * The base equality function: Return not equal for anything we don't know + * about. + */ +bool +ir_instruction::equals(ir_instruction *ir) +{ + return false; +} + +bool +ir_constant::equals(ir_instruction *ir) +{ + const ir_constant *other = ir->as_constant(); + if (!other) + return false; + + if (type != other->type) + return false; + + for (unsigned i = 0; i < type->components(); i++) { + if (value.u[i] != other->value.u[i]) + return false; + } + + return true; +} + +bool +ir_dereference_variable::equals(ir_instruction *ir) +{ + const ir_dereference_variable *other = ir->as_dereference_variable(); + if (!other) + return false; + + return var == other->var; +} + +bool +ir_dereference_array::equals(ir_instruction *ir) +{ + const ir_dereference_array *other = ir->as_dereference_array(); + if (!other) + return false; + + if (type != other->type) + return false; + + if (!array->equals(other->array)) + return false; + + if (!array_index->equals(other->array_index)) + return false; + + return true; +} + +bool +ir_swizzle::equals(ir_instruction *ir) +{ + const ir_swizzle *other = ir->as_swizzle(); + if (!other) + return false; + + if (type != other->type) + return false; + + if (mask.x != other->mask.x || + mask.y != other->mask.y || + mask.z != other->mask.z || + mask.w != other->mask.w) { + return false; + } + + return val->equals(other->val); +} + +bool +ir_texture::equals(ir_instruction *ir) +{ + const ir_texture *other = ir->as_texture(); + if (!other) + return false; + + if (type != other->type) + return false; + + if (op != other->op) + return false; + + if (!possibly_null_equals(coordinate, other->coordinate)) + return false; + + if (!possibly_null_equals(projector, other->projector)) + return false; + + if (!possibly_null_equals(shadow_comparitor, other->shadow_comparitor)) + return false; + + if (!possibly_null_equals(offset, other->offset)) + return false; + + if (!sampler->equals(other->sampler)) + return false; + + switch (op) { + case ir_tex: + case ir_lod: + case ir_query_levels: + break; + case ir_txb: + if (!lod_info.bias->equals(other->lod_info.bias)) + return false; + break; + case ir_txl: + case ir_txf: + case ir_txs: + if (!lod_info.lod->equals(other->lod_info.lod)) + return false; + break; + case ir_txd: + if (!lod_info.grad.dPdx->equals(other->lod_info.grad.dPdx) || + !lod_info.grad.dPdy->equals(other->lod_info.grad.dPdy)) + return false; + break; + case ir_txf_ms: + if (!lod_info.sample_index->equals(other->lod_info.sample_index)) + return false; + break; + case ir_tg4: + if (!lod_info.component->equals(other->lod_info.component)) + return false; + break; + default: + assert(!"Unrecognized texture op"); + } + + return true; +} + +bool +ir_expression::equals(ir_instruction *ir) +{ + const ir_expression *other = ir->as_expression(); + if (!other) + return false; + + if (type != other->type) + return false; + + if (operation != other->operation) + return false; + + for (unsigned i = 0; i < get_num_operands(); i++) { + if (!operands[i]->equals(other->operands[i])) + return false; + } + + return true; +} |