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SPU LLVM: simplify CG, CGX, BG, BGX

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This commit is contained in:
Nekotekina 2018-07-09 19:54:29 +03:00
parent 03e6725fcf
commit 9b4e63df6d
1 changed files with 6 additions and 7 deletions
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13
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -3054,7 +3054,7 @@ public:
{
const auto a = get_vr(op.ra);
const auto b = get_vr(op.rb);
set_vr(op.rt, ~ucarry(a, eval(b - a), b) >> 31);
set_vr(op.rt, zext<u32[4]>(a <= b));
}
void SFH(spu_opcode_t op) //
@ -3194,7 +3194,7 @@ public:
{
const auto a = get_vr(op.ra);
const auto b = get_vr(op.rb);
set_vr(op.rt, ucarry(a, b, eval(a + b)) >> 31);
set_vr(op.rt, zext<u32[4]>(a + b < a));
}
void AH(spu_opcode_t op) //
@ -3653,18 +3653,17 @@ public:
{
const auto a = get_vr(op.ra);
const auto b = get_vr(op.rb);
const auto c = eval(get_vr(op.rt) << 31);
const auto c = eval(get_vr<s32[4]>(op.rt) << 31);
const auto s = eval(a + b);
set_vr(op.rt, (ucarry(a, b, s) | (sext<u32[4]>(s == 0xffffffffu) & c)) >> 31);
set_vr(op.rt, zext<u32[4]>(s < a | (s == -1 & c < 0)));
}
void BGX(spu_opcode_t op)
{
const auto a = get_vr(op.ra);
const auto b = get_vr(op.rb);
const auto c = eval(get_vr(op.rt) << 31);
const auto d = eval(b - a);
set_vr(op.rt, (~ucarry(a, d, b) & ~(sext<u32[4]>(d == 0) & ~c)) >> 31);
const auto c = eval(get_vr<s32[4]>(op.rt) << 31);
set_vr(op.rt, zext<u32[4]>(a <= b & ~(a == b & c >= 0)));
}
void MPYHHA(spu_opcode_t op)