diff options
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp index 5254617d238..a91d698c5b2 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp @@ -940,6 +940,23 @@ ConstantFolding::opnd(Instruction *i, ImmediateValue &imm0, int s) case OP_EX2: unary(i, imm0); break; + case OP_BFIND: { + int32_t res; + switch (i->dType) { + case TYPE_S32: res = util_last_bit_signed(imm0.reg.data.s32) - 1; break; + case TYPE_U32: res = util_last_bit(imm0.reg.data.u32) - 1; break; + default: + return; + } + if (i->subOp == NV50_IR_SUBOP_BFIND_SAMT && res >= 0) + res = 31 - res; + bld.setPosition(i, false); /* make sure bld is init'ed */ + i->setSrc(0, bld.mkImm(res)); + i->setSrc(1, NULL); + i->op = OP_MOV; + i->subOp = 0; + break; + } default: return; } |