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36 lines
926 B
36 lines
926 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 "primitives.h"
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#include "internals.h"
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#include "softfloat.h"
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float32_t i64_to_f32( int_fast64_t a )
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{
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bool sign;
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uint_fast64_t absA;
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int shiftCount;
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union ui32_f32 u;
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uint_fast32_t sig;
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sign = ( a < 0 );
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absA = sign ? - (uint_fast64_t) a : a;
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shiftCount = softfloat_countLeadingZeros64( absA ) - 40;
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if ( 0 <= shiftCount ) {
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u.ui =
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a ? packToF32UI(
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sign, 0x95 - shiftCount, (uint_fast32_t) absA<<shiftCount )
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: 0;
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return u.f;
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} else {
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shiftCount += 7;
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sig =
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( shiftCount < 0 )
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? softfloat_shortShift64RightJam( absA, - shiftCount )
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: (uint_fast32_t) absA<<shiftCount;
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return softfloat_roundPackToF32( sign, 0x9C - shiftCount, sig );
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}
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}
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