diff options
Diffstat (limited to 'sysdeps/libm-i387/s_cexp.S')
| -rw-r--r-- | sysdeps/libm-i387/s_cexp.S | 22 |
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. */ |