mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
13da9e200f
This reverts commitb3b77c8cae, which was also totally broken (see commit0d2daf5cc8that reverted the crc32 version of it). As reported by Stephen Rothwell, it causes problems on big-endian machines: > In file included from fs/jfs/jfs_types.h:33, > from fs/jfs/jfs_incore.h:26, > from fs/jfs/file.c:22: > fs/jfs/endian24.h:36:101: warning: "__LITTLE_ENDIAN" is not defined The kernel has never had that crazy "__BYTE_ORDER == __LITTLE_ENDIAN" model. It's not how we do things, and it isn't how we _should_ do things. So don't go there. Requested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
/*
|
|
* These are copied from glibc/stdlib/longlong.h
|
|
*/
|
|
|
|
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
|
|
do { \
|
|
UWtype __x; \
|
|
__x = (al) + (bl); \
|
|
(sh) = (ah) + (bh) + (__x < (al)); \
|
|
(sl) = __x; \
|
|
} while (0)
|
|
|
|
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
|
|
do { \
|
|
UWtype __x; \
|
|
__x = (al) - (bl); \
|
|
(sh) = (ah) - (bh) - (__x > (al)); \
|
|
(sl) = __x; \
|
|
} while (0)
|
|
|
|
#define umul_ppmm(w1, w0, u, v) \
|
|
__asm__ ("dmulu.l %2,%3\n\tsts macl,%1\n\tsts mach,%0" \
|
|
: "=r" ((u32)(w1)), "=r" ((u32)(w0)) \
|
|
: "r" ((u32)(u)), "r" ((u32)(v)) \
|
|
: "macl", "mach")
|
|
|
|
#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
|
|
#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
|
|
#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
|
|
|
|
#define udiv_qrnnd(q, r, n1, n0, d) \
|
|
do { \
|
|
UWtype __d1, __d0, __q1, __q0; \
|
|
UWtype __r1, __r0, __m; \
|
|
__d1 = __ll_highpart (d); \
|
|
__d0 = __ll_lowpart (d); \
|
|
\
|
|
__r1 = (n1) % __d1; \
|
|
__q1 = (n1) / __d1; \
|
|
__m = (UWtype) __q1 * __d0; \
|
|
__r1 = __r1 * __ll_B | __ll_highpart (n0); \
|
|
if (__r1 < __m) \
|
|
{ \
|
|
__q1--, __r1 += (d); \
|
|
if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
|
|
if (__r1 < __m) \
|
|
__q1--, __r1 += (d); \
|
|
} \
|
|
__r1 -= __m; \
|
|
\
|
|
__r0 = __r1 % __d1; \
|
|
__q0 = __r1 / __d1; \
|
|
__m = (UWtype) __q0 * __d0; \
|
|
__r0 = __r0 * __ll_B | __ll_lowpart (n0); \
|
|
if (__r0 < __m) \
|
|
{ \
|
|
__q0--, __r0 += (d); \
|
|
if (__r0 >= (d)) \
|
|
if (__r0 < __m) \
|
|
__q0--, __r0 += (d); \
|
|
} \
|
|
__r0 -= __m; \
|
|
\
|
|
(q) = (UWtype) __q1 * __ll_B | __q0; \
|
|
(r) = __r0; \
|
|
} while (0)
|
|
|
|
#define abort() return 0
|
|
|
|
#define __BYTE_ORDER __LITTLE_ENDIAN
|
|
|
|
|