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30 lines
734 B
30 lines
734 B
15 years ago
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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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uint_fast32_t f64_to_ui32( float64_t a, int_fast8_t roundingMode, bool exact )
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{
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union ui64_f64 uA;
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uint_fast64_t uiA;
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bool sign;
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int_fast16_t exp;
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uint_fast64_t sig;
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int_fast16_t shiftCount;
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uA.f = a;
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uiA = uA.ui;
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sign = signF64UI( uiA );
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exp = expF64UI( uiA );
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sig = fracF64UI( uiA );
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if ( exp ) sig |= UINT64_C( 0x0010000000000000 );
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shiftCount = 0x42C - exp;
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if ( 0 < shiftCount ) sig = softfloat_shift64RightJam( sig, shiftCount );
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return softfloat_roundPackToUI32( sign, sig, roundingMode, exact );
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}
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