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| author | das <das@FreeBSD.org> | 2005-03-07 04:55:22 +0000 |
|---|---|---|
| committer | das <das@FreeBSD.org> | 2005-03-07 04:55:22 +0000 |
| commit | 5bfaaf046488af0dd3a30704b1de957d8e998484 (patch) | |
| tree | 0587ae7e38dc49cbd8c4f33e5beaf44770486b0f /lib/libc/amd64 | |
| parent | e08a3e75cadf3db2f91c84aa1fb0e266b4334fc4 (diff) | |
| download | FreeBSD-src-5bfaaf046488af0dd3a30704b1de957d8e998484.zip FreeBSD-src-5bfaaf046488af0dd3a30704b1de957d8e998484.tar.gz | |
Define LDBL_NBIT to be a mask indicating the position of the integer
bit in a long double. For architectures that don't have such a bit,
LDBL_NBIT is 0. This makes it possible to say `mantissa & ~LDBL_NBIT'
in places that previously used an #ifdef to select the right expression.
The optimizer should dispense with the extra arithmetic when LDBL_NBIT
is 0.
Diffstat (limited to 'lib/libc/amd64')
| -rw-r--r-- | lib/libc/amd64/_fpmath.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/libc/amd64/_fpmath.h b/lib/libc/amd64/_fpmath.h index 08ec6f2..8f8cf6f 100644 --- a/lib/libc/amd64/_fpmath.h +++ b/lib/libc/amd64/_fpmath.h @@ -38,7 +38,8 @@ union IEEEl2bits { } bits; }; -#define mask_nbit_l(u) ((u).bits.manh &= 0x7fffffff) +#define LDBL_NBIT 0x80000000 +#define mask_nbit_l(u) ((u).bits.manh &= ~LDBL_NBIT) #define LDBL_MANH_SIZE 32 #define LDBL_MANL_SIZE 32 |
