diff options
Diffstat (limited to 'src/gallium/drivers/nv50')
| -rw-r--r-- | src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp index 997d21aaf27..0af44baa8fc 100644 --- a/src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp +++ b/src/gallium/drivers/nv50/codegen/nv50_ir_peephole.cpp @@ -933,6 +933,7 @@ private: void handleSLCT(Instruction *); void handleLOGOP(Instruction *); void handleCVT(Instruction *); + void handleSUCLAMP(Instruction *); BuildUtil bld; }; @@ -1217,6 +1218,47 @@ AlgebraicOpt::handleCVT(Instruction *cvt) delete_Instruction(prog, cvt); } +// SUCLAMP dst, (ADD b imm), k, 0 -> SUCLAMP dst, b, k, imm (if imm fits s6) +void +AlgebraicOpt::handleSUCLAMP(Instruction *insn) +{ + ImmediateValue imm; + int32_t val = insn->getSrc(2)->asImm()->reg.data.s32; + int s; + Instruction *add; + + assert(insn->srcExists(0) && insn->src(0).getFile() == FILE_GPR); + + // look for ADD (TODO: only count references by non-SUCLAMP) + if (insn->getSrc(0)->refCount() > 1) + return; + add = insn->getSrc(0)->getInsn(); + if (!add || add->op != OP_ADD || + (add->dType != TYPE_U32 && + add->dType != TYPE_S32)) + return; + + // look for immediate + for (s = 0; s < 2; ++s) + if (add->src(s).getImmediate(imm)) + break; + if (s >= 2) + return; + s = s ? 0 : 1; + // determine if immediate fits + val += imm.reg.data.s32; + if (val > 31 || val < -32) + return; + // determine if other addend fits + if (add->src(s).getFile() != FILE_GPR || add->src(s).mod != Modifier(0)) + return; + + bld.setPosition(insn, false); // make sure bld is init'ed + // replace sources + insn->setSrc(2, bld.mkImm(val)); + insn->setSrc(0, add->getSrc(s)); +} + bool AlgebraicOpt::visit(BasicBlock *bb) { @@ -1248,6 +1290,9 @@ AlgebraicOpt::visit(BasicBlock *bb) case OP_CVT: handleCVT(i); break; + case OP_SUCLAMP: + handleSUCLAMP(i); + break; default: break; } |