diff options
Diffstat (limited to 'src/mesa/shader/slang/slang_emit.c')
| -rw-r--r-- | src/mesa/shader/slang/slang_emit.c | 60 |
1 files changed, 50 insertions, 10 deletions
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c index eca9cdba2d6..0f6d6cb5547 100644 --- a/src/mesa/shader/slang/slang_emit.c +++ b/src/mesa/shader/slang/slang_emit.c @@ -39,6 +39,8 @@ #include "slang_error.h" +#define PEEPHOLE_OPTIMIZATIONS 1 + /** * Assembly and IR info */ @@ -450,16 +452,54 @@ emit_binop(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog) * replace with MAD instruction. */ - /* gen code for children */ - emit(vt, n->Children[0], prog); - emit(vt, n->Children[1], prog); +#if PEEPHOLE_OPTIMIZATIONS + /* Look for MAD opportunity */ + if (n->Opcode == IR_ADD && n->Children[0]->Opcode == IR_MUL) { + /* found pattern IR_ADD(IR_MUL(A, B), C) */ + emit(vt, n->Children[0]->Children[0], prog); /* A */ + emit(vt, n->Children[0]->Children[1], prog); /* B */ + emit(vt, n->Children[1], prog); /* C */ + /* generate MAD instruction */ + inst = new_instruction(prog, OPCODE_MAD); + /* operands: A, B, C: */ + storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Children[0]->Store); + storage_to_src_reg(&inst->SrcReg[1], n->Children[0]->Children[1]->Store); + storage_to_src_reg(&inst->SrcReg[2], n->Children[1]->Store); + free_temp_storage(vt, n->Children[0]->Children[0]); + free_temp_storage(vt, n->Children[0]->Children[1]); + free_temp_storage(vt, n->Children[1]); + } + else if (n->Opcode == IR_ADD && n->Children[1]->Opcode == IR_MUL) { + /* found pattern IR_ADD(A, IR_MUL(B, C)) */ + emit(vt, n->Children[0], prog); /* A */ + emit(vt, n->Children[1]->Children[0], prog); /* B */ + emit(vt, n->Children[1]->Children[1], prog); /* C */ + /* generate MAD instruction */ + inst = new_instruction(prog, OPCODE_MAD); + /* operands: B, C, A */ + storage_to_src_reg(&inst->SrcReg[0], n->Children[1]->Children[0]->Store); + storage_to_src_reg(&inst->SrcReg[1], n->Children[1]->Children[1]->Store); + storage_to_src_reg(&inst->SrcReg[2], n->Children[0]->Store); + free_temp_storage(vt, n->Children[1]->Children[0]); + free_temp_storage(vt, n->Children[1]->Children[1]); + free_temp_storage(vt, n->Children[0]); + } + else +#endif + { + /* normal case */ - /* gen this instruction */ - inst = new_instruction(prog, info->InstOpcode); - storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Store); - storage_to_src_reg(&inst->SrcReg[1], n->Children[1]->Store); - free_temp_storage(vt, n->Children[0]); - free_temp_storage(vt, n->Children[1]); + /* gen code for children */ + emit(vt, n->Children[0], prog); + emit(vt, n->Children[1], prog); + + /* gen this instruction */ + inst = new_instruction(prog, info->InstOpcode); + storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Store); + storage_to_src_reg(&inst->SrcReg[1], n->Children[1]->Store); + free_temp_storage(vt, n->Children[0]); + free_temp_storage(vt, n->Children[1]); + } if (!n->Store) { alloc_temp_storage(vt, n, info->ResultSize); @@ -623,7 +663,7 @@ emit_move(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog) /* lhs */ emit(vt, n->Children[0], prog); -#if 1 +#if PEEPHOLE_OPTIMIZATIONS if (inst && _slang_is_temp(vt, n->Children[1]->Store->Index)) { /* Peephole optimization: * Just modify the RHS to put its result into the dest of this |