diff options
author | Michal Simek <monstr@monstr.eu> | 2010-08-12 12:28:53 (GMT) |
---|---|---|
committer | Michal Simek <monstr@monstr.eu> | 2010-10-21 05:51:42 (GMT) |
commit | 4e07dba7cb8c9c76a52d0e32b69f13bb583a9674 (patch) | |
tree | 2f12579e642d5eea3c28f4b7c51a35a465b5e2a2 /arch/microblaze/lib/ashrdi3.c | |
parent | cec051671dc2bb72cc2870aa149d7101ea494b8b (diff) | |
download | linux-fsl-qoriq-4e07dba7cb8c9c76a52d0e32b69f13bb583a9674.tar.xz |
microblaze: Add libgcc function directly to kernel
Replaced libgcc functions with asm optimized implementation.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/lib/ashrdi3.c')
-rw-r--r-- | arch/microblaze/lib/ashrdi3.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/microblaze/lib/ashrdi3.c b/arch/microblaze/lib/ashrdi3.c new file mode 100644 index 0000000..c884a91 --- /dev/null +++ b/arch/microblaze/lib/ashrdi3.c @@ -0,0 +1,31 @@ +#include <linux/module.h> + +#include "libgcc.h" + +long long __ashrdi3(long long u, word_type b) +{ + DWunion uu, w; + word_type bm; + + if (b == 0) + return u; + + uu.ll = u; + bm = 32 - b; + + if (bm <= 0) { + /* w.s.high = 1..1 or 0..0 */ + w.s.high = + uu.s.high >> 31; + w.s.low = uu.s.high >> -bm; + } else { + const unsigned int carries = (unsigned int) uu.s.high << bm; + + w.s.high = uu.s.high >> b; + w.s.low = ((unsigned int) uu.s.low >> b) | carries; + } + + return w.ll; +} + +EXPORT_SYMBOL(__ashrdi3); |