f16_to_i32_r_minMag.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	f16_to_i32_r_minMag (float16_t a, bool exact)

Function Documentation

f16_to_i32_r_minMag()

int_fast32_t f16_to_i32_r_minMag	(	float16_t	a,
		bool	exact )

Definition at line 44 of file f16_to_i32_r_minMag.c.

{
    union ui16_f16 uA;
    uint_fast16_t uiA;
    int_fast8_t exp;
    uint_fast16_t frac;
    int_fast8_t shiftDist;
    bool sign;
    int_fast32_t alignedSig;
 
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    uA.f = a;
    uiA = uA.ui;
    exp  = expF16UI( uiA );
    frac = fracF16UI( uiA );
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    shiftDist = exp - 0x0F;
    if ( shiftDist < 0 ) {
        if ( exact && (exp | frac) ) {
            softfloat_exceptionFlags |= softfloat_flag_inexact;
        }
        return 0;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    sign = signF16UI( uiA );
    if ( exp == 0x1F ) {
        softfloat_raiseFlags( softfloat_flag_invalid );
        return
            (exp == 0x1F) && frac ? i32_fromNaN
                : sign ? i32_fromNegOverflow : i32_fromPosOverflow;
    }
    /*------------------------------------------------------------------------
    *------------------------------------------------------------------------*/
    alignedSig = (int_fast32_t) (frac | 0x0400)<<shiftDist;
    if ( exact && (alignedSig & 0x3FF) ) {
        softfloat_exceptionFlags |= softfloat_flag_inexact;
    }
    alignedSig >>= 10;
    return sign ? -alignedSig : alignedSig;
 
}

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