diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/s_floorl.S')
| -rw-r--r-- | sysdeps/x86_64/fpu/s_floorl.S | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sysdeps/x86_64/fpu/s_floorl.S b/sysdeps/x86_64/fpu/s_floorl.S index f9ecc388df..535fdd8571 100644 --- a/sysdeps/x86_64/fpu/s_floorl.S +++ b/sysdeps/x86_64/fpu/s_floorl.S @@ -10,20 +10,25 @@ ENTRY(__floorl) 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 $0x400,%edx /* round towards -oo */ - orl -4(%rsp),%edx + orl -28(%rsp),%edx andl $0xf7ff,%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 (__floorl) |