diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/shader/slang/slang_emit.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c index b5a2dfaafc4..b00ab3c7bf3 100644 --- a/src/mesa/shader/slang/slang_emit.c +++ b/src/mesa/shader/slang/slang_emit.c @@ -1053,12 +1053,37 @@ emit_cond(slang_emit_info *emitInfo, slang_ir_node *n) static struct prog_instruction * emit_not(slang_emit_info *emitInfo, slang_ir_node *n) { + static const struct { + gl_inst_opcode op, opNot; + } operators[] = { + { OPCODE_SLT, OPCODE_SGE }, + { OPCODE_SLE, OPCODE_SGT }, + { OPCODE_SGT, OPCODE_SLE }, + { OPCODE_SGE, OPCODE_SLT }, + { OPCODE_SEQ, OPCODE_SNE }, + { OPCODE_SNE, OPCODE_SEQ }, + { 0, 0 } + }; struct prog_instruction *inst; + GLuint i; /* child expr */ - (void) emit(emitInfo, n->Children[0]); - /* XXXX if child instr is SGT convert to SLE, if SEQ, SNE, etc */ + inst = emit(emitInfo, n->Children[0]); + +#if PEEPHOLE_OPTIMIZATIONS + if (inst) { + /* if the prev instruction was a comparison instruction, invert it */ + for (i = 0; operators[i].op; i++) { + if (inst->Opcode == operators[i].op) { + inst->Opcode = operators[i].opNot; + n->Store = n->Children[0]->Store; + return inst; + } + } + } +#endif + /* else, invert using SEQ (v = v == 0) */ if (!n->Store) if (!alloc_temp_storage(emitInfo, n, n->Children[0]->Store->Size)) return NULL; @@ -1762,7 +1787,7 @@ _slang_emit_code(slang_ir_node *n, slang_var_table *vt, emitInfo.NumSubroutines = 0; emitInfo.EmitHighLevelInstructions = ctx->Shader.EmitHighLevelInstructions; - emitInfo.EmitCondCodes = 0*ctx->Shader.EmitCondCodes; + emitInfo.EmitCondCodes = ctx->Shader.EmitCondCodes; emitInfo.EmitComments = ctx->Shader.EmitComments; emitInfo.EmitBeginEndSub = 0; /* XXX for compiler debug only */ |