Commit e5b0cbe8 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

softfloat: define 680x0 specific values 



Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Message-Id: <20170611231633.32582-2-laurent@vivier.eu>
parent 043b936e

fpu/softfloat-specialize.h

+31 −3
Original line number Diff line number Diff line
@@ -111,7 +111,7 @@ float16 float16_default_nan(float_status *status) 
*----------------------------------------------------------------------------*/

float32 float32_default_nan(float_status *status)

{

#if defined(TARGET_SPARC)

#if defined(TARGET_SPARC) || defined(TARGET_M68K)

    return const_float32(0x7FFFFFFF);

#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \

      defined(TARGET_XTENSA) || defined(TARGET_S390X) || defined(TARGET_TRICORE)
@@ -136,7 +136,7 @@ float32 float32_default_nan(float_status *status) 
*----------------------------------------------------------------------------*/

float64 float64_default_nan(float_status *status)

{

#if defined(TARGET_SPARC)

#if defined(TARGET_SPARC) || defined(TARGET_M68K)

    return const_float64(LIT64(0x7FFFFFFFFFFFFFFF));

#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) || \

      defined(TARGET_S390X)
@@ -162,7 +162,10 @@ float64 float64_default_nan(float_status *status) 
floatx80 floatx80_default_nan(float_status *status)

{

    floatx80 r;



#if defined(TARGET_M68K)

    r.low = LIT64(0xFFFFFFFFFFFFFFFF);

    r.high = 0x7FFF;

#else

    if (status->snan_bit_is_one) {

        r.low = LIT64(0xBFFFFFFFFFFFFFFF);

        r.high = 0x7FFF;
@@ -170,6 +173,7 @@ floatx80 floatx80_default_nan(float_status *status) 
        r.low = LIT64(0xC000000000000000);

        r.high = 0xFFFF;

    }

#endif

    return r;

}
@@ -502,6 +506,30 @@ static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN, 
        return 1;

    }

}

#elif defined(TARGET_M68K)

static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,

                   flag aIsLargerSignificand)

{

    /* M68000 FAMILY PROGRAMMER'S REFERENCE MANUAL

     * 3.4 FLOATING-POINT INSTRUCTION DETAILS

     * If either operand, but not both operands, of an operation is a

     * nonsignaling NaN, then that NaN is returned as the result. If both

     * operands are nonsignaling NaNs, then the destination operand

     * nonsignaling NaN is returned as the result.

     * If either operand to an operation is a signaling NaN (SNaN), then the

     * SNaN bit is set in the FPSR EXC byte. If the SNaN exception enable bit

     * is set in the FPCR ENABLE byte, then the exception is taken and the

     * destination is not modified. If the SNaN exception enable bit is not

     * set, setting the SNaN bit in the operand to a one converts the SNaN to

     * a nonsignaling NaN. The operation then continues as described in the

     * preceding paragraph for nonsignaling NaNs.

     */

    if (aIsQNaN || aIsSNaN) { /* a is the destination operand */

        return 0; /* return the destination operand */

    } else {

        return 1; /* return b */

    }

}

#else

static int pickNaN(flag aIsQNaN, flag aIsSNaN, flag bIsQNaN, flag bIsSNaN,

                    flag aIsLargerSignificand)