i64_to_f128M.c File Reference

#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "softfloat.h"

Include dependency graph for i64_to_f128M.c:

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Functions
void	i64_to_f128M (int64_t a, float128_t *zPtr)

Function Documentation

i64_to_f128M()

void i64_to_f128M	(	int64_t	a,
		float128_t *	zPtr )

Definition at line 53 of file i64_to_f128M.c.

{
    uint32_t *zWPtr;
    uint32_t uiZ96, uiZ64;
    bool sign;
    uint64_t absA;
    uint_fast8_t shiftDist;
    uint32_t *ptr;
 
    zWPtr = (uint32_t *) zPtr;
    uiZ96 = 0;
    uiZ64 = 0;
    zWPtr[indexWord( 4, 1 )] = 0;
    zWPtr[indexWord( 4, 0 )] = 0;
    if ( a ) {
        sign = (a < 0);
        absA = sign ? -(uint64_t) a : (uint64_t) a;
        shiftDist = softfloat_countLeadingZeros64( absA ) + 17;
        if ( shiftDist < 32 ) {
            ptr = zWPtr + indexMultiwordHi( 4, 3 );
            ptr[indexWord( 3, 2 )] = 0;
            ptr[indexWord( 3, 1 )] = absA>>32;
            ptr[indexWord( 3, 0 )] = absA;
            softfloat_shortShiftLeft96M( ptr, shiftDist, ptr );
            ptr[indexWordHi( 3 )] =
                packToF128UI96(
                    sign, 0x404E - shiftDist, ptr[indexWordHi( 3 )] );
            return;
        }
        absA <<= shiftDist - 32;
        uiZ96 = packToF128UI96( sign, 0x404E - shiftDist, absA>>32 );
        uiZ64 = absA;
    }
    zWPtr[indexWord( 4, 3 )] = uiZ96;
    zWPtr[indexWord( 4, 2 )] = uiZ64;
 
}