Commit 9a069775 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

target/m68k: define floatx80_move() 



This functions is needed by upcoming m68k softfloat functions.

Source code copied for WinUAE (tag 3500)
(The WinUAE file has been copied from QEMU and has
the QEMU licensing notice)

Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Message-Id: <20180305203910.10391-2-laurent@vivier.eu>
parent e1ee9ee1

target/m68k/softfloat.c

+27 −0
Original line number Diff line number Diff line
@@ -247,3 +247,30 @@ floatx80 floatx80_scale(floatx80 a, floatx80 b, float_status *status) 
    return roundAndPackFloatx80(status->floatx80_rounding_precision,

                                aSign, aExp, aSig, 0, status);

}



floatx80 floatx80_move(floatx80 a, float_status *status)

{

    flag aSign;

    int32_t aExp;

    uint64_t aSig;



    aSig = extractFloatx80Frac(a);

    aExp = extractFloatx80Exp(a);

    aSign = extractFloatx80Sign(a);



    if (aExp == 0x7FFF) {

        if ((uint64_t)(aSig << 1)) {

            return propagateFloatx80NaNOneArg(a, status);

        }

        return a;

    }

    if (aExp == 0) {

        if (aSig == 0) {

            return a;

        }

        normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision,

                                      aSign, aExp, aSig, 0, status);

    }

    return roundAndPackFloatx80(status->floatx80_rounding_precision, aSign,

                                aExp, aSig, 0, status);

}

target/m68k/softfloat.h

+1 −0
Original line number Diff line number Diff line
@@ -26,4 +26,5 @@ floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status); 
floatx80 floatx80_getman(floatx80 a, float_status *status);

floatx80 floatx80_getexp(floatx80 a, float_status *status);

floatx80 floatx80_scale(floatx80 a, floatx80 b, float_status *status);

floatx80 floatx80_move(floatx80 a, float_status *status);

#endif