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https://github.com/jpd002/Play-.git
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64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
#include "FpUtils.h"
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#include "MipsJitter.h"
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#ifdef _WIN32
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#define DENORM_X86
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#elif defined(__APPLE__)
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#include <TargetConditionals.h>
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#if TARGET_CPU_X86 || TARGET_CPU_X86_64
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#define DENORM_X86
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#elif TARGET_CPU_ARM64
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#define DENORM_AARCH64
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#endif
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#elif defined(__ANDROID__) || defined(__linux__) || defined(__FreeBSD__)
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#if defined(__i386__) || defined(__x86_64__)
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#define DENORM_X86
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#elif defined(__aarch64__)
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#define DENORM_AARCH64
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#endif
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#endif
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#ifdef DENORM_X86
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#include <xmmintrin.h>
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#include <pmmintrin.h>
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#endif
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#define EXC_FP_MAX 0x7F7FFFFF
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void FpUtils::SetDenormalHandlingMode()
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{
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#ifdef DENORM_X86
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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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#endif
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#ifdef DENORM_AARCH64
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static const uint64 fpcrFZ = (1 << 24);
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__asm__ __volatile__(
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"mrs x0, fpcr\n"
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"orr x0, x0, %0\n"
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"msr fpcr, x0\n"
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: : "ri"(fpcrFZ) : "x0");
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#endif
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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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