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JitArm64: Check packed NaNs without using extra register 

A small optimization for AccurateNaNs.
This commit is contained in:
JosJuice 2023-09-21 18:19:12 +02:00
parent 9862ba4548
commit 24950ce0e0
1 changed files with 5 additions and 14 deletions
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19
Source/Core/Core/PowerPC/JitArm64/JitArm64_Paired.cpp
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@ -111,7 +111,6 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
ARM64Reg V0Q = ARM64Reg::INVALID_REG;
ARM64Reg V1Q = ARM64Reg::INVALID_REG;
ARM64Reg V2Q = ARM64Reg::INVALID_REG;
ARM64Reg V3Q = ARM64Reg::INVALID_REG;
ARM64Reg rounded_c_reg = VC;
if (round_c)
@ -149,10 +148,8 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
if (V0Q == ARM64Reg::INVALID_REG)
V0Q = fpr.GetReg();
V2Q = fpr.GetReg();
if (duplicated_c || VD == result_reg)
V3Q = fpr.GetReg();
V2Q = fpr.GetReg();
}
switch (op5)
@ -239,8 +236,6 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
const ARM64Reg nan_temp_reg = singles ? EncodeRegToSingle(V0Q) : EncodeRegToDouble(V0Q);
const ARM64Reg nan_temp_reg_paired = reg_encoder(V0Q);
const ARM64Reg zero_reg = reg_encoder(V2Q);
// Check if we need to handle NaNs
m_float_emit.FMAXP(nan_temp_reg, result_reg);
@ -254,17 +249,15 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
// Pick the right NaNs
m_float_emit.MOVI(64, zero_reg, 0);
const auto check_input = [&](ARM64Reg input) {
m_float_emit.FACGE(size, nan_temp_reg_paired, input, zero_reg);
m_float_emit.FCMEQ(size, nan_temp_reg_paired, input, input);
m_float_emit.BIF(result_reg, input, nan_temp_reg_paired);
};
ARM64Reg c_reg_for_nan_purposes = VC;
if (duplicated_c)
{
c_reg_for_nan_purposes = reg_encoder(V3Q);
c_reg_for_nan_purposes = reg_encoder(V2Q);
m_float_emit.DUP(size, c_reg_for_nan_purposes, VC, op5 & 0x1);
}
@ -279,10 +272,10 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
// Make the NaNs quiet
const ARM64Reg quiet_bit_reg = VD == result_reg ? reg_encoder(V3Q) : VD;
const ARM64Reg quiet_bit_reg = VD == result_reg ? reg_encoder(V2Q) : VD;
EmitQuietNaNBitConstant(quiet_bit_reg, singles, temp_gpr);
m_float_emit.FACGE(size, nan_temp_reg_paired, result_reg, zero_reg);
m_float_emit.FCMEQ(size, nan_temp_reg_paired, result_reg, result_reg);
m_float_emit.ORR(quiet_bit_reg, quiet_bit_reg, result_reg);
if (negate_result)
m_float_emit.FNEG(size, result_reg, result_reg);
@ -312,8 +305,6 @@ void JitArm64::ps_arith(UGeckoInstruction inst)
fpr.Unlock(V1Q);
if (V2Q != ARM64Reg::INVALID_REG)
fpr.Unlock(V2Q);
if (V3Q != ARM64Reg::INVALID_REG)
fpr.Unlock(V3Q);
if (temp_gpr != ARM64Reg::INVALID_REG)
gpr.Unlock(temp_gpr);