diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/fpu_helper.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/target/i386/fpu_helper.c b/target/i386/fpu_helper.c index 10ff903..72d1e77 100644 --- a/target/i386/fpu_helper.c +++ b/target/i386/fpu_helper.c @@ -977,6 +977,28 @@ void helper_fscale(CPUX86State *env) float_raise(float_flag_invalid, &env->fp_status); ST0 = floatx80_silence_nan(ST0, &env->fp_status); } + } else if (floatx80_is_infinity(ST1) && + !floatx80_invalid_encoding(ST0) && + !floatx80_is_any_nan(ST0)) { + if (floatx80_is_neg(ST1)) { + if (floatx80_is_infinity(ST0)) { + float_raise(float_flag_invalid, &env->fp_status); + ST0 = floatx80_default_nan(&env->fp_status); + } else { + ST0 = (floatx80_is_neg(ST0) ? + floatx80_chs(floatx80_zero) : + floatx80_zero); + } + } else { + if (floatx80_is_zero(ST0)) { + float_raise(float_flag_invalid, &env->fp_status); + ST0 = floatx80_default_nan(&env->fp_status); + } else { + ST0 = (floatx80_is_neg(ST0) ? + floatx80_chs(floatx80_infinity) : + floatx80_infinity); + } + } } else { int n = floatx80_to_int32_round_to_zero(ST1, &env->fp_status); ST0 = floatx80_scalbn(ST0, n, &env->fp_status); |