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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2015-02-02 16:07:07 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2015-02-02 16:07:07 +0100 |
| commit | f7f70bf1b3025550ea4ad8d13d977b846a868a06 (patch) | |
| tree | 2c18d81eab7e897d982a18667fdafa062a93e033 /include/platform.h | |
| parent | 7f7ade1964f61172125d9f4fe92f0b07ce8bc7a4 (diff) | |
| download | busybox-f7f70bf1b3025550ea4ad8d13d977b846a868a06.tar.gz | |
gzip: speed up and shrink put_16bit()
function old new delta
put_16bit 104 98 -6
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'include/platform.h')
| -rw-r--r-- | include/platform.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/platform.h b/include/platform.h index 0b0fce182..df9594507 100644 --- a/include/platform.h +++ b/include/platform.h @@ -217,6 +217,7 @@ typedef uint64_t bb__aliased_uint64_t FIX_ALIASING; * a lvalue. This makes it more likely to not swap them by mistake */ #if defined(i386) || defined(__x86_64__) || defined(__powerpc__) +# define BB_UNALIGNED_MEMACCESS_OK 1 # define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp)) # define move_from_unaligned_long(v, longp) ((v) = *(bb__aliased_long*)(longp)) # define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p)) @@ -225,6 +226,7 @@ typedef uint64_t bb__aliased_uint64_t FIX_ALIASING; # define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v)) /* #elif ... - add your favorite arch today! */ #else +# define BB_UNALIGNED_MEMACCESS_OK 0 /* performs reasonably well (gcc usually inlines memcpy here) */ # define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int))) # define move_from_unaligned_long(v, longp) (memcpy(&(v), (longp), sizeof(long))) |