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Diffstat (limited to 'sysdeps/i386/fpu/e_logf.S')
-rw-r--r--sysdeps/i386/fpu/e_logf.S15
1 files changed, 11 insertions, 4 deletions
diff --git a/sysdeps/i386/fpu/e_logf.S b/sysdeps/i386/fpu/e_logf.S
index bdba1d3225..cd4538b594 100644
--- a/sysdeps/i386/fpu/e_logf.S
+++ b/sysdeps/i386/fpu/e_logf.S
@@ -37,13 +37,15 @@ limit: .double 0.29
ENTRY(__ieee754_logf)
fldln2 // log(2)
flds 4(%esp) // x : log(2)
+ fxam
+ fnstsw
#ifdef PIC
- call 1f
-1: popl %edx
- addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %edx
+ LOAD_PIC_REG (dx)
#endif
fld %st // x : x : log(2)
- fsubl MO(one) // x-1 : x : log(2)
+ sahf
+ jc 3f // in case x is NaN or +-Inf
+4: fsubl MO(one) // x-1 : x : log(2)
fld %st // x-1 : x-1 : x : log(2)
fabs // |x-1| : x-1 : x : log(2)
fcompl MO(limit) // x-1 : x : log(2)
@@ -57,4 +59,9 @@ ENTRY(__ieee754_logf)
2: fstp %st(0) // x : log(2)
fyl2x // log(x)
ret
+
+3: jp 4b // in case x is +-Inf
+ fstp %st(1)
+ fstp %st(1)
+ ret
END (__ieee754_logf)