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-rw-r--r--sysdeps/i386/fpu/e_logl.S8
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/i386/fpu/e_logl.S b/sysdeps/i386/fpu/e_logl.S
index 828e98aa8d..7a6d370e8f 100644
--- a/sysdeps/i386/fpu/e_logl.S
+++ b/sysdeps/i386/fpu/e_logl.S
@@ -84,7 +84,13 @@ ENTRY(__logl_finite)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2b
- fstp %st(1) // x-1 : log(2)
+ fxam
+ fnstsw
+ andb $0x45, %ah
+ cmpb $0x40, %ah
+ jne 7f
+ fabs // log(1) is +0 in all rounding modes.
+7: fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
END(__logl_finite)