linux/arch/mips/lib
Ralf Baechle 1ee3630a3e MIPS: Use ARCH_USE_BUILTIN_BSWAP.
ARCH_USE_BUILTIN_BSWAP will use __builtin_bswap16(), __builtin_bswap32()
and __builtin_bswap64() where available.  This allows better instruction
scheduling.  On pre-R2 processors it will result in 32 bit and 64 bit
swapping being performed in a call to a __bswapsi2() rsp. __bswapdi2()
functions, so we add these, too.

For a 4.2 kernel with GCC 4.9 this yields the following kernel sizes:

   text    data     bss     dec     hex filename
3996071  155804   88992 4240867  40b5e3 vmlinux         ip22 baseline
3985687  159900   88992 4234579  409d53 vmlinux         ip22 + bswap patch
6913157  378552  251024 7542733  7317cd vmlinux         ip27 baseline
6878581  378552  251024 7508157  7290bd vmlinux         ip27 + bswap patch
5773777  268752  187424 6229953  5f0fc1 vmlinux         malta baseline
5773401  268752  187424 6229577  5f0e49 vmlinux         malta + bswap patch

Presumably the code size improvments yield better cache hit rate thus
better performance compensating for the extra function call but this
will still need to be benchmarked.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-26 09:49:43 +01:00
..
ashldi3.c
ashrdi3.c
bitops.c
bswapdi.c MIPS: Use ARCH_USE_BUILTIN_BSWAP. 2015-10-26 09:49:43 +01:00
bswapsi.c MIPS: Use ARCH_USE_BUILTIN_BSWAP. 2015-10-26 09:49:43 +01:00
cmpdi2.c
csum_partial.S
delay.c
dump_tlb.c MIPS: Rearrange ENTRYLO field definitions 2015-09-03 12:07:48 +02:00
iomap-pci.c
iomap.c
libgcc.h
lshrdi3.c
Makefile MIPS: Use ARCH_USE_BUILTIN_BSWAP. 2015-10-26 09:49:43 +01:00
memcpy.S
memset.S
mips-atomic.c
r3k_dump_tlb.c MIPS: Refactor dumping of TLB registers for r3k/r4k 2015-09-03 12:07:45 +02:00
strlen_user.S
strncpy_user.S
strnlen_user.S
ucmpdi2.c
uncached.c