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| author | Tanguy Pruvot <tanguy.pruvot@gmail.com> | 2011-08-11 04:48:29 +0200 |
|---|---|---|
| committer | Tanguy Pruvot <tanguy.pruvot@gmail.com> | 2011-08-11 04:48:29 +0200 |
| commit | 48303e96bc26c8e128e4c8a7992e174902855da3 (patch) | |
| tree | da2eb10a4dbf68547282e03349ac6b8db7e8af60 | |
| parent | 39368054d45a08776185e3541975e96d4f68ee79 (diff) | |
| download | bionic-48303e96bc26c8e128e4c8a7992e174902855da3.zip bionic-48303e96bc26c8e128e4c8a7992e174902855da3.tar.gz bionic-48303e96bc26c8e128e4c8a7992e174902855da3.tar.bz2 | |
Enable use of clz instruction in ffs function for all ARMv5+
Enable use of faster code in ffs using clz instruction for
other architectures than ARMv5.
Also enables usage of ffs function in dlmalloc.
Based on Change: Ifdc42db by c.bejram <christian.bejram@stericsson.com>
Note: this ffs.S code is old, and the whole block could be deleted
because android doesnt have support for ARMv4 SoCs
Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>
| -rw-r--r-- | libc/arch-arm/bionic/ffs.S | 2 | ||||
| -rw-r--r-- | libc/bionic/dlmalloc.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/libc/arch-arm/bionic/ffs.S b/libc/arch-arm/bionic/ffs.S index f11141c..c7ffca2 100644 --- a/libc/arch-arm/bionic/ffs.S +++ b/libc/arch-arm/bionic/ffs.S @@ -47,7 +47,7 @@ ENTRY(ffs) /* Standard trick to isolate bottom bit in r0 or 0 if r0 = 0 on entry */ rsb r1, r0, #0 ands r0, r0, r1 -#ifndef __ARM_ARCH_5__ +#if _ARM_ARCH_ < 5 /* * now r0 has at most one set bit, call this X * if X = 0, all further instructions are skipped diff --git a/libc/bionic/dlmalloc.c b/libc/bionic/dlmalloc.c index 19fbb75..559ccaf 100644 --- a/libc/bionic/dlmalloc.c +++ b/libc/bionic/dlmalloc.c @@ -465,6 +465,10 @@ DEFAULT_MMAP_THRESHOLD default: 256K */ +#ifdef ANDROID +#define USE_BUILTIN_FFS 1 +#endif /* ANDROID */ + #ifndef WIN32 #ifdef _WIN32 #define WIN32 1 |