extF80M_to_i32.c File Reference

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

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Functions
int_fast32_t	extF80M_to_i32 (const extFloat80_t *aPtr, uint_fast8_t roundingMode, bool exact)

Function Documentation

extF80M_to_i32()

int_fast32_t extF80M_to_i32	(	const extFloat80_t *	aPtr,
		uint_fast8_t	roundingMode,
		bool	exact )

Definition at line 58 of file extF80M_to_i32.c.

{
    const struct extFloat80M *aSPtr;
    uint_fast16_t uiA64;
    bool sign;
    int32_t exp;
    uint64_t sig;
    int32_t shiftDist;
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    aSPtr = (const struct extFloat80M *) aPtr;
    uiA64 = aSPtr->signExp;
    sign = signExtF80UI64( uiA64 );
    exp  = expExtF80UI64( uiA64 );
    sig = aSPtr->signif;
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    shiftDist = 0x4032 - exp;
    if ( shiftDist <= 0 ) {
        if ( sig>>32 ) goto invalid;
        if ( -32 < shiftDist ) {
            sig <<= -shiftDist;
        } else {
            if ( (uint32_t) sig ) goto invalid;
        }
    } else {
        sig = softfloat_shiftRightJam64( sig, shiftDist );
    }
    return softfloat_roundToI32( sign, sig, roundingMode, exact );
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
 invalid:
    softfloat_raiseFlags( softfloat_flag_invalid );
    return
        (exp == 0x7FFF) && (sig & UINT64_C( 0x7FFFFFFFFFFFFFFF )) ? i32_fromNaN
            : sign ? i32_fromNegOverflow : i32_fromPosOverflow;
 
}

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