fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

implement bit-perfect vrsqrtefp

Browse Source
This commit is contained in:
disjtqz
2023-09-30 14:59:56 -04:00
committed by Radosław Gliński
parent cfecdcbeab
commit 79465708aa
9 changed files with 540 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/xenia/cpu/compiler/passes/simplification_pass.cc
View File

@@ -1370,6 +1370,38 @@ bool SimplificationPass::SimplifyVectorOps(hir::Instr* i,
}
}
}
/*
splatting a 32-bit value extracted from a vector where all 4 32-bit values are the same should be eliminated and
instead use the vector extracted from, which will be identical
have seen this happen, some games vmsum and then splat the low float to all 4 floats, even though it already is there
*/
if (opc == OPCODE_SPLAT) {
if (i->dest->type == VEC128_TYPE) {
auto splatted_value = i->src1.value;
auto splat_type = splatted_value->type;
if (splat_type == FLOAT32_TYPE || splat_type == INT32_TYPE) {
//its a splat of a fourbyte value, check the definition
auto splat_input_definition = splatted_value->GetDefSkipAssigns();
if (splat_input_definition) {
auto defining_opcode = splat_input_definition->GetOpcodeNum();
if (defining_opcode == OPCODE_EXTRACT) {
auto value_extracted_from = splat_input_definition->src1.value;
if (value_extracted_from->type == VEC128_TYPE) {
xenia_assert(splat_input_definition->dest->type == splat_type);
if (value_extracted_from->AllFloatVectorLanesSameValue()) {
i->Replace(&OPCODE_ASSIGN_info,0);
i->set_src1(value_extracted_from);
return true;
}
}
}
}
}
}
}
return false;
}
bool SimplificationPass::SimplifyVectorOps(hir::HIRBuilder* builder) {