Commit eee6b892 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

target/m68k: implement fsinh 



Using a local m68k floatx80_sinh()
[copied from previous:
Written by Andreas Grabher for Previous, NeXT Computer Emulator.]

Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Message-Id: <20180312202728.23790-11-laurent@vivier.eu>
parent 9937b029

target/m68k/fpu_helper.c

+5 −0
Original line number Diff line number Diff line
@@ -643,3 +643,8 @@ void HELPER(ftanh)(CPUM68KState *env, FPReg *res, FPReg *val) 
{

    res->d = floatx80_tanh(val->d, &env->fp_status);

}



void HELPER(fsinh)(CPUM68KState *env, FPReg *res, FPReg *val)

{

    res->d = floatx80_sinh(val->d, &env->fp_status);

}

target/m68k/helper.h

+1 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ DEF_HELPER_3(fasin, void, env, fp, fp) 
DEF_HELPER_3(facos, void, env, fp, fp)

DEF_HELPER_3(fatanh, void, env, fp, fp)

DEF_HELPER_3(ftanh, void, env, fp, fp)

DEF_HELPER_3(fsinh, void, env, fp, fp)



DEF_HELPER_3(mac_move, void, env, i32, i32)

DEF_HELPER_3(macmulf, i64, env, i32, i32)

target/m68k/softfloat.c

+89 −0
Original line number Diff line number Diff line
@@ -2733,3 +2733,92 @@ floatx80 floatx80_tanh(floatx80 a, float_status *status) 
        return a;

    }

}



/*----------------------------------------------------------------------------

 | Hyperbolic sine

 *----------------------------------------------------------------------------*/



floatx80 floatx80_sinh(floatx80 a, float_status *status)

{

    flag aSign;

    int32_t aExp;

    uint64_t aSig;



    int8_t user_rnd_mode, user_rnd_prec;



    int32_t compact;

    floatx80 fp0, fp1, fp2;

    float32 fact;



    aSig = extractFloatx80Frac(a);

    aExp = extractFloatx80Exp(a);

    aSign = extractFloatx80Sign(a);



    if (aExp == 0x7FFF) {

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

            return propagateFloatx80NaNOneArg(a, status);

        }

        return packFloatx80(aSign, floatx80_infinity.high,

                            floatx80_infinity.low);

    }



    if (aExp == 0 && aSig == 0) {

        return packFloatx80(aSign, 0, 0);

    }



    user_rnd_mode = status->float_rounding_mode;

    user_rnd_prec = status->floatx80_rounding_precision;

    status->float_rounding_mode = float_round_nearest_even;

    status->floatx80_rounding_precision = 80;



    compact = floatx80_make_compact(aExp, aSig);



    if (compact > 0x400CB167) {

        /* SINHBIG */

        if (compact > 0x400CB2B3) {

            status->float_rounding_mode = user_rnd_mode;

            status->floatx80_rounding_precision = user_rnd_prec;



            return roundAndPackFloatx80(status->floatx80_rounding_precision,

                                        aSign, 0x8000, aSig, 0, status);

        } else {

            fp0 = floatx80_abs(a); /* Y = |X| */

            fp0 = floatx80_sub(fp0, float64_to_floatx80(

                               make_float64(0x40C62D38D3D64634), status),

                               status); /* (|X|-16381LOG2_LEAD) */

            fp0 = floatx80_sub(fp0, float64_to_floatx80(

                               make_float64(0x3D6F90AEB1E75CC7), status),

                               status); /* |X| - 16381 LOG2, ACCURATE */

            fp0 = floatx80_etox(fp0, status);

            fp2 = packFloatx80(aSign, 0x7FFB, one_sig);



            status->float_rounding_mode = user_rnd_mode;

            status->floatx80_rounding_precision = user_rnd_prec;



            a = floatx80_mul(fp0, fp2, status);



            float_raise(float_flag_inexact, status);



            return a;

        }

    } else { /* |X| < 16380 LOG2 */

        fp0 = floatx80_abs(a); /* Y = |X| */

        fp0 = floatx80_etoxm1(fp0, status); /* FP0 IS Z = EXPM1(Y) */

        fp1 = floatx80_add(fp0, float32_to_floatx80(make_float32(0x3F800000),

                           status), status); /* 1+Z */

        fp2 = fp0;

        fp0 = floatx80_div(fp0, fp1, status); /* Z/(1+Z) */

        fp0 = floatx80_add(fp0, fp2, status);



        fact = packFloat32(aSign, 0x7E, 0);



        status->float_rounding_mode = user_rnd_mode;

        status->floatx80_rounding_precision = user_rnd_prec;



        a = floatx80_mul(fp0, float32_to_floatx80(fact, status), status);



        float_raise(float_flag_inexact, status);



        return a;

    }

}

target/m68k/softfloat.h

+1 −0
Original line number Diff line number Diff line
@@ -43,4 +43,5 @@ floatx80 floatx80_acos(floatx80 a, float_status *status); 
floatx80 floatx80_atanh(floatx80 a, float_status *status);

floatx80 floatx80_etoxm1(floatx80 a, float_status *status);

floatx80 floatx80_tanh(floatx80 a, float_status *status);

floatx80 floatx80_sinh(floatx80 a, float_status *status);

#endif

target/m68k/translate.c

+3 −0
Original line number Diff line number Diff line
@@ -5042,6 +5042,9 @@ DISAS_INSN(fpu) 
    case 1: /* fint */

        gen_helper_firound(cpu_env, cpu_dest, cpu_src);

        break;

    case 2: /* fsinh */

        gen_helper_fsinh(cpu_env, cpu_dest, cpu_src);

        break;

    case 3: /* fintrz */

        gen_helper_fitrunc(cpu_env, cpu_dest, cpu_src);

        break;