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Jit64AsmCommon: Make frsqrte and fres PIE-compliant

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This commit is contained in:
MerryMage 2017-04-11 17:01:29 +01:00
commit f7ed979e30
3 changed files with 51 additions and 33 deletions
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24
Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
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@ -69,13 +69,20 @@ void CommonAsmRoutines::GenFrsqrte()
AND(32, R(RSCRATCH_EXTRA), Imm8(0x1F));
XOR(32, R(RSCRATCH_EXTRA), Imm8(0x10)); // int index = i / 2048 + (odd_exponent ? 16 : 0);
PUSH(RSCRATCH2);
MOV(64, R(RSCRATCH2), ImmPtr(GetConstantFromPool(MathUtil::frsqrte_expected)));
static_assert(sizeof(MathUtil::BaseAndDec) == 8, "Unable to use SCALE_8; incorrect size");
SHR(64, R(RSCRATCH), Imm8(37));
AND(32, R(RSCRATCH), Imm32(0x7FF));
IMUL(32, RSCRATCH, MScaled(RSCRATCH_EXTRA, SCALE_4, PtrOffset(MathUtil::frsqrte_expected_dec)));
IMUL(32, RSCRATCH,
MComplex(RSCRATCH2, RSCRATCH_EXTRA, SCALE_8, offsetof(MathUtil::BaseAndDec, m_dec)));
MOV(32, R(RSCRATCH_EXTRA),
MScaled(RSCRATCH_EXTRA, SCALE_4, PtrOffset(MathUtil::frsqrte_expected_base)));
MComplex(RSCRATCH2, RSCRATCH_EXTRA, SCALE_8, offsetof(MathUtil::BaseAndDec, m_base)));
SUB(32, R(RSCRATCH_EXTRA), R(RSCRATCH));
SHL(64, R(RSCRATCH_EXTRA), Imm8(26));
POP(RSCRATCH2);
OR(64, R(RSCRATCH2), R(RSCRATCH_EXTRA)); // vali |= (s64)(frsqrte_expected_base[index] -
// frsqrte_expected_dec[index] * (i % 2048)) << 26;
MOVQ_xmm(XMM0, R(RSCRATCH2));
@ -140,13 +147,22 @@ void CommonAsmRoutines::GenFres()
AND(32, R(RSCRATCH), Imm32(0x3FF)); // i % 1024
AND(32, R(RSCRATCH2), Imm8(0x1F)); // i / 1024
IMUL(32, RSCRATCH, MScaled(RSCRATCH2, SCALE_4, PtrOffset(MathUtil::fres_expected_dec)));
PUSH(RSCRATCH_EXTRA);
MOV(64, R(RSCRATCH_EXTRA), ImmPtr(GetConstantFromPool(MathUtil::fres_expected)));
static_assert(sizeof(MathUtil::BaseAndDec) == 8, "Unable to use SCALE_8; incorrect size");
IMUL(32, RSCRATCH,
MComplex(RSCRATCH_EXTRA, RSCRATCH2, SCALE_8, offsetof(MathUtil::BaseAndDec, m_dec)));
ADD(32, R(RSCRATCH), Imm8(1));
SHR(32, R(RSCRATCH), Imm8(1));
MOV(32, R(RSCRATCH2), MScaled(RSCRATCH2, SCALE_4, PtrOffset(MathUtil::fres_expected_base)));
MOV(32, R(RSCRATCH2),
MComplex(RSCRATCH_EXTRA, RSCRATCH2, SCALE_8, offsetof(MathUtil::BaseAndDec, m_base)));
SUB(32, R(RSCRATCH2), R(RSCRATCH));
SHL(64, R(RSCRATCH2), Imm8(29));
POP(RSCRATCH_EXTRA);
OR(64, R(RSCRATCH2), R(RSCRATCH_EXTRA)); // vali |= (s64)(fres_expected_base[i / 1024] -
// (fres_expected_dec[i / 1024] * (i % 1024) + 1) / 2)
// << 29