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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-20 23:19:15 -0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-20 23:19:15 -0400 |
commit | cfa76f024f7c9e65169425804e5b32e71f66d0ee (patch) | |
tree | ee64e98cbfb1b654842c9256446a9584857f6730 /arch/parisc/lib/libgcc/__umulsidi3.c | |
parent | 093faa1dd26fc6766f8f04c429030757a8a0def4 (diff) | |
parent | 7210c678202bb3107085bffeb63f66a9b8ba1c85 (diff) |
Merge branch 'master' of hera.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6
* 'master' of hera.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6: (29 commits)
[PARISC] fix uninitialized variable warning in asm/rtc.h
[PARISC] Port checkstack.pl to parisc
[PARISC] Make palo target work when $obj != $src
[PARISC] Zap unused variable warnings in pci.c
[PARISC] Fix tests in palo target
[PARISC] Fix palo target
[PARISC] Restore palo target
[PARISC] Attempt to clean up parisc/Makefile
[PARISC] Fix infinite loop in /proc/iomem
[PARISC] Quiet sysfs_create_link __must_check warnings in pdc_stable
[PARISC] Squelch pci_enable_device __must_check warning in superio
[PARISC] Kill off broken irqstack code
[PARISC] Remove hardcoded uses of PAGE_SIZE
[PARISC] Clean up pointless ASM_PAGE_SIZE_DIV use
[PARISC] Kill off the last vestiges of ASM_PAGE_SIZE
[PARISC] Kill off ASM_PAGE_SIZE use
[PARISC] Beautify parisc vmlinux.lds.S
[PARISC] Clean up a resource_size_t warning in sba_iommu
[PARISC] Kill incorrect cast warning in unwinder
[PARISC] Kill zone_to_nid printk warning
...
Fixed trivial conflict in include/asm-parisc/tlbflush.h manually
Diffstat (limited to 'arch/parisc/lib/libgcc/__umulsidi3.c')
-rw-r--r-- | arch/parisc/lib/libgcc/__umulsidi3.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/parisc/lib/libgcc/__umulsidi3.c b/arch/parisc/lib/libgcc/__umulsidi3.c new file mode 100644 index 000000000000..396f669164d4 --- /dev/null +++ b/arch/parisc/lib/libgcc/__umulsidi3.c | |||
@@ -0,0 +1,46 @@ | |||
1 | #include "libgcc.h" | ||
2 | |||
3 | #define __ll_B ((u32) 1 << (32 / 2)) | ||
4 | #define __ll_lowpart(t) ((u32) (t) & (__ll_B - 1)) | ||
5 | #define __ll_highpart(t) ((u32) (t) >> 16) | ||
6 | |||
7 | #define umul_ppmm(w1, w0, u, v) \ | ||
8 | do { \ | ||
9 | u32 __x0, __x1, __x2, __x3; \ | ||
10 | u16 __ul, __vl, __uh, __vh; \ | ||
11 | \ | ||
12 | __ul = __ll_lowpart (u); \ | ||
13 | __uh = __ll_highpart (u); \ | ||
14 | __vl = __ll_lowpart (v); \ | ||
15 | __vh = __ll_highpart (v); \ | ||
16 | \ | ||
17 | __x0 = (u32) __ul * __vl; \ | ||
18 | __x1 = (u32) __ul * __vh; \ | ||
19 | __x2 = (u32) __uh * __vl; \ | ||
20 | __x3 = (u32) __uh * __vh; \ | ||
21 | \ | ||
22 | __x1 += __ll_highpart (__x0);/* this can't give carry */ \ | ||
23 | __x1 += __x2; /* but this indeed can */ \ | ||
24 | if (__x1 < __x2) /* did we get it? */ \ | ||
25 | __x3 += __ll_B; /* yes, add it in the proper pos. */ \ | ||
26 | \ | ||
27 | (w1) = __x3 + __ll_highpart (__x1); \ | ||
28 | (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \ | ||
29 | } while (0) | ||
30 | |||
31 | union DWunion { | ||
32 | struct { | ||
33 | s32 high; | ||
34 | s32 low; | ||
35 | } s; | ||
36 | s64 ll; | ||
37 | }; | ||
38 | |||
39 | u64 __umulsidi3(u32 u, u32 v) | ||
40 | { | ||
41 | union DWunion __w; | ||
42 | |||
43 | umul_ppmm(__w.s.high, __w.s.low, u, v); | ||
44 | |||
45 | return __w.ll; | ||
46 | } | ||