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29 lines
657 B
29 lines
657 B
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#include <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "internals.h"
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#include "softfloat.h"
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float32_t f32_sub( float32_t a, float32_t b )
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{
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union ui32_f32 uA;
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uint_fast32_t uiA;
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bool signA;
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union ui32_f32 uB;
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uint_fast32_t uiB;
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bool signB;
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float32_t ( *magsRoutine )( uint_fast32_t, uint_fast32_t, bool );
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uA.f = a;
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uiA = uA.ui;
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signA = signF32UI( uiA );
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uB.f = b;
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uiB = uB.ui;
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signB = signF32UI( uiB );
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magsRoutine =
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( signA == signB ) ? softfloat_subMagsF32 : softfloat_addMagsF32;
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return magsRoutine( uiA, uiB ^ 0x80000000, signA );
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}
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