diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-10-16 10:02:57 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-10-26 15:38:07 +0200 |
| commit | 5caa1833d22c2f3c3f08c80d9bf86dccf9aa25a4 (patch) | |
| tree | 81d4b2e9f7baf85785c1627e429d2e6e72a5f35f /target | |
| parent | 6f529b7534c534afe2f2b834199191d8b4cc07ca (diff) | |
| download | qemu-5caa1833d22c2f3c3f08c80d9bf86dccf9aa25a4.zip | |
target/i386: introduce cpu_set_fpus
In the next patch, this will provide a hook to detect clearing of
FSW.ES.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/fpu_helper.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/target/i386/fpu_helper.c b/target/i386/fpu_helper.c index 4db0059676..6825024f5c 100644 --- a/target/i386/fpu_helper.c +++ b/target/i386/fpu_helper.c @@ -1053,6 +1053,12 @@ void helper_fstenv(CPUX86State *env, target_ulong ptr, int data32) do_fstenv(env, ptr, data32, GETPC()); } +static void cpu_set_fpus(CPUX86State *env, uint16_t fpus) +{ + env->fpstt = (fpus >> 11) & 7; + env->fpus = fpus & ~0x3800; +} + static void do_fldenv(CPUX86State *env, target_ulong ptr, int data32, uintptr_t retaddr) { @@ -1067,8 +1073,7 @@ static void do_fldenv(CPUX86State *env, target_ulong ptr, int data32, fpus = cpu_lduw_data_ra(env, ptr + 2, retaddr); fptag = cpu_lduw_data_ra(env, ptr + 4, retaddr); } - env->fpstt = (fpus >> 11) & 7; - env->fpus = fpus & ~0x3800; + cpu_set_fpus(env, fpus); for (i = 0; i < 8; i++) { env->fptags[i] = ((fptag & 3) == 3); fptag >>= 2; @@ -1316,8 +1321,7 @@ static void do_xrstor_fpu(CPUX86State *env, target_ulong ptr, uintptr_t ra) fpus = cpu_lduw_data_ra(env, ptr + XO(legacy.fsw), ra); fptag = cpu_lduw_data_ra(env, ptr + XO(legacy.ftw), ra); cpu_set_fpuc(env, fpuc); - env->fpstt = (fpus >> 11) & 7; - env->fpus = fpus & ~0x3800; + cpu_set_fpus(env, fpus); fptag ^= 0xff; for (i = 0; i < 8; i++) { env->fptags[i] = ((fptag >> i) & 1); |