diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/s_ceill.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_ceill.S | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sysdeps/x86_64/fpu/s_ceill.S b/sysdeps/x86_64/fpu/s_ceill.S index 910c371..9d8b79d 100644 --- a/sysdeps/x86_64/fpu/s_ceill.S +++ b/sysdeps/x86_64/fpu/s_ceill.S @@ -11,20 +11,25 @@ ENTRY(__ceill) fldt 8(%rsp) - fstcw -4(%rsp) /* store fpu control word */ + fnstenv -28(%rsp) /* store fpu environment */ /* We use here %edx although only the low 1 bits are defined. But none of the operations should care and they are faster than the 16 bit operations. */ movl $0x0800,%edx /* round towards +oo */ - orl -4(%rsp),%edx + orl -28(%rsp),%edx andl $0xfbff,%edx - movl %edx,-8(%rsp) - fldcw -8(%rsp) /* load modified control word */ + movl %edx,-32(%rsp) + fldcw -32(%rsp) /* load modified control word */ frndint /* round */ - fldcw -4(%rsp) /* restore original control word */ + /* Preserve "invalid" exceptions from sNaN input. */ + fnstsw + andl $0x1, %eax + orl %eax, -24(%rsp) + + fldenv -28(%rsp) /* restore original environment */ ret END (__ceill) |