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DSPJitUtil: Use round_long_acc in get_long_prod_round_prodl 

Identical, except that this used a temporary register as scratch instead 
of RCX. round_long_acc now no longer needs scratch, so we can 
deduplicate the logic.
This commit is contained in:
Sintendo 2019-06-05 23:33:02 +02:00
parent 832e320f08
commit a3744c3c26
1 changed files with 1 additions and 17 deletions
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18
Source/Core/Core/DSP/Jit/x64/DSPJitUtil.cpp
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@ -665,28 +665,12 @@ void DSPEmitter::get_long_prod(X64Reg long_prod)
} }
// Returns s64 in RAX // Returns s64 in RAX
// Clobbers RCX
void DSPEmitter::get_long_prod_round_prodl(X64Reg long_prod) void DSPEmitter::get_long_prod_round_prodl(X64Reg long_prod)
{ {
// s64 prod = dsp_get_long_prod(); // s64 prod = dsp_get_long_prod();
get_long_prod(long_prod); get_long_prod(long_prod);
X64Reg tmp = m_gpr.GetFreeXReg(); round_long_acc(long_prod);
// if (prod & 0x10000) prod = (prod + 0x8000) & ~0xffff;
TEST(32, R(long_prod), Imm32(0x10000));
FixupBranch jump = J_CC(CC_Z);
ADD(64, R(long_prod), Imm32(0x8000));
MOV(64, R(tmp), Imm64(~0xffff));
AND(64, R(long_prod), R(tmp));
FixupBranch _ret = J();
// else prod = (prod + 0x7fff) & ~0xffff;
SetJumpTarget(jump);
ADD(64, R(long_prod), Imm32(0x7fff));
MOV(64, R(tmp), Imm64(~0xffff));
AND(64, R(long_prod), R(tmp));
SetJumpTarget(_ret);
// return prod;
m_gpr.PutXReg(tmp);
} }
// For accurate emulation, this is wrong - but the real prod registers behave // For accurate emulation, this is wrong - but the real prod registers behave