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[a64] Remove `VOne` constant in favor of `FMOV`

This commit is contained in:
Wunkolo 2024-05-27 13:13:17 -07:00
parent 3b1a696dd6
commit cba92a2e6e
3 changed files with 4 additions and 6 deletions
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1
src/xenia/cpu/backend/a64/a64_emitter.cc
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@ -689,7 +689,6 @@ void A64Emitter::MovMem64(const oaknut::XRegSp& addr, intptr_t offset,
static const vec128_t v_consts[] = {
/* VZero */ vec128f(0.0f),
/* VOne */ vec128f(1.0f),
/* VOnePD */ vec128d(1.0),
/* VNegativeOne */ vec128f(-1.0f, -1.0f, -1.0f, -1.0f),
/* VFFFF */

5
src/xenia/cpu/backend/a64/a64_emitter.h
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@ -47,7 +47,6 @@ enum RegisterFlags {
enum VConst {
VZero = 0,
VOne,
VOnePD,
VNegativeOne,
VFFFF,
@ -201,12 +200,12 @@ class A64Emitter : public oaknut::CodeBlock, public oaknut::CodeGenerator {
void ReloadMembase();
// Moves a 64bit immediate into memory.
bool ConstantFitsIn32Reg(uint64_t v);
static bool ConstantFitsIn32Reg(uint64_t v);
void MovMem64(const oaknut::XRegSp& addr, intptr_t offset, uint64_t v);
std::byte* GetVConstPtr() const;
std::byte* GetVConstPtr(VConst id) const;
constexpr uintptr_t GetVConstOffset(VConst id) const {
static constexpr uintptr_t GetVConstOffset(VConst id){
return sizeof(vec128_t) * id;
}
void LoadConstantV(oaknut::QReg dest, float v);

4
src/xenia/cpu/backend/a64/a64_seq_vector.cc
View File

@ -1746,7 +1746,7 @@ struct UNPACK : Sequence<UNPACK, I<OPCODE_UNPACK, V128Op, V128Op>> {
if (i.src1.is_constant) {
if (i.src1.value->IsConstantZero()) {
e.LDR(i.dest.reg(), VConstData, e.GetVConstOffset(VOne));
e.FMOV(i.dest.reg().S4(), FImm8(0, 7, 0));
return;
}
src = i.dest;
@ -1759,7 +1759,7 @@ struct UNPACK : Sequence<UNPACK, I<OPCODE_UNPACK, V128Op, V128Op>> {
e.LDR(Q1, VConstData, e.GetVConstOffset(VUnpackD3DCOLOR));
e.TBL(i.dest.reg().B16(), oaknut::List{src.B16()}, Q1.B16());
// Add 1.0f to each.
e.LDR(Q1, VConstData, e.GetVConstOffset(VOne));
e.FMOV(Q1.S4(), FImm8(0, 7, 0));
e.EOR(i.dest.reg().B16(), i.dest.reg().B16(), Q1.B16());
// To convert to 0 to 1, games multiply by 0x47008081 and add 0xC7008081.
}