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| author | Dmitry Poletaev <poletaev-qemu@yandex.ru> | 2014-11-11 15:29:39 +0300 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2014-12-14 16:34:29 -0600 |
| commit | ea32aaf1a72af102b855317b47a22e75ac2965a9 (patch) | |
| tree | 52bc0534b56cff7b08a76c788ba86493d6ccd3e4 /target-i386 | |
| parent | 99c9c3cb24e566258a0a141178934f9cb5198842 (diff) | |
| download | qemu-ea32aaf1a72af102b855317b47a22e75ac2965a9.tar.gz | |
target-i386: Wrong conversion infinity from float80 to int32/int64
Signed-off-by: Dmitry Poletaev <poletaev-qemu@yandex.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386')
| -rw-r--r-- | target-i386/fpu_helper.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/target-i386/fpu_helper.c b/target-i386/fpu_helper.c index 1d4eee3974..8768e1cf2c 100644 --- a/target-i386/fpu_helper.c +++ b/target-i386/fpu_helper.c @@ -251,16 +251,34 @@ int32_t helper_fist_ST0(CPUX86State *env) int32_t helper_fistl_ST0(CPUX86State *env) { int32_t val; + signed char old_exp_flags; + + old_exp_flags = get_float_exception_flags(&env->fp_status); + set_float_exception_flags(0, &env->fp_status); val = floatx80_to_int32(ST0, &env->fp_status); + if (get_float_exception_flags(&env->fp_status) & float_flag_invalid) { + val = 0x80000000; + } + set_float_exception_flags(get_float_exception_flags(&env->fp_status) + | old_exp_flags, &env->fp_status); return val; } int64_t helper_fistll_ST0(CPUX86State *env) { int64_t val; + signed char old_exp_flags; - val = floatx80_to_int64(ST0, &env->fp_status); + old_exp_flags = get_float_exception_flags(&env->fp_status); + set_float_exception_flags(0, &env->fp_status); + + val = floatx80_to_int32(ST0, &env->fp_status); + if (get_float_exception_flags(&env->fp_status) & float_flag_invalid) { + val = 0x8000000000000000ULL; + } + set_float_exception_flags(get_float_exception_flags(&env->fp_status) + | old_exp_flags, &env->fp_status); return val; } |