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35 lines
797 B
C++
35 lines
797 B
C++
#include "FpUtils.h"
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#include "MipsJitter.h"
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#include <xmmintrin.h>
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#include <pmmintrin.h>
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#define EXC_FP_MAX 0x7F7FFFFF
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void FpUtils::SetDenormalHandlingMode()
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{
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_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
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_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
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}
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void FpUtils::IsZero(CMipsJitter* codeGen, size_t offset)
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{
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//Check wether an FP number is +/-0
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//BeginIf(CONDITION_EQ) to verify result
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codeGen->PushRel(offset);
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codeGen->PushCst(0x7FFFFFFF);
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codeGen->And();
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codeGen->PushCst(0);
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}
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void FpUtils::ComputeDivisionByZero(CMipsJitter* codeGen, size_t dividend, size_t divisor)
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{
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//Return either +/-FP_MAX
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codeGen->PushCst(EXC_FP_MAX);
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codeGen->PushRel(dividend);
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codeGen->PushRel(divisor);
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codeGen->Xor();
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codeGen->PushCst(0x80000000);
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codeGen->And();
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codeGen->Or();
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}
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