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-rw-r--r--sysdeps/libm-i387/s_cexp.S22
1 files changed, 16 insertions, 6 deletions
diff --git a/sysdeps/libm-i387/s_cexp.S b/sysdeps/libm-i387/s_cexp.S
index 48e002b2f6..5630d3cb65 100644
--- a/sysdeps/libm-i387/s_cexp.S
+++ b/sysdeps/libm-i387/s_cexp.S
@@ -31,7 +31,8 @@ huge_nan_null_null:
.byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f
.byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
.double 0.0
- .double 0.0
+zero: .double 0.0
+infinity:
.byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f
.byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
.double 0.0
@@ -90,7 +91,7 @@ ENTRY(__cexp)
Check your FPU manual for more information. */
andb $0x01, %ah
cmpb $0x01, %ah
- je 2f
+ je 20f
/* We have finite numbers in the real and imaginary part. Do
the real work now. */
@@ -139,9 +140,8 @@ ENTRY(__cexp)
1: fxam /* y : x */
fnstsw
movb %ah, %dl
- andb $0x01, %ah /* See above why 0x01 is usable here. */
- cmpb $0x01, %ah
- je 3f
+ testb $0x01, %ah /* See above why 0x01 is usable here. */
+ jne 3f
/* The real part is +-Inf and the imaginary part is finite. */
@@ -220,7 +220,14 @@ ENTRY(__cexp)
.align ALIGNARG(4)
3: fstp %st(0)
fstp %st(0) /* <empty> */
- movl %edx, %eax
+ andb $0x45, %ah
+ andb $0x47, %dh
+ xorb %dh, %ah
+ jnz 30f
+ fldl MO(infinity) /* Raise invalid exception. */
+ fmull MO(zero)
+ fstp %st(0)
+30: movl %edx, %eax
shrl $5, %edx
shll $4, %eax
andl $16, %edx
@@ -236,6 +243,9 @@ ENTRY(__cexp)
/* The real part is NaN. */
.align ALIGNARG(4)
+20: fldl MO(infinity) /* Raise invalid exception. */
+ fmull MO(zero)
+ fstp %st(0)
2: fstp %st(0)
fstp %st(0)
movl 4(%esp), %eax /* Pointer to memory for result. */