| Message ID | 52CC2CB0.3080309@arm.com |
|---|---|
| State | New |
| Headers | show |
Ping~ OK for stage-1? The original patch was posted here: http://gcc.gnu.org/ml/gcc-patches/2014-01/msg00286.html and the glibc patch was approved here: http://sourceware.org/ml/libc-alpha/2014-01/msg00120.html Thanks, Yufeng On 01/07/14 16:34, Yufeng Zhang wrote: > Hi, > > This patch is to sync up include/longlong.h with its glibc peer after > the proposed change here: > > http://sourceware.org/ml/libc-alpha/2014-01/msg00114.html > > The patch defines a number of macros in stdlib/longlong.h to use GCC > builtins __builtin_clz* to implement the __clz* and __ctz* functions on > AArch64. > > OK for the mainline? > > Thanks, > Yufeng > > include/ > > * longlong.h (count_leading_zeros, count_trailing_zeros) > (COUNT_LEADING_ZEROS_0): Define for aarch64.
On 22 April 2014 17:09, Yufeng Zhang <Yufeng.Zhang@arm.com> wrote: > Ping~ > > OK for stage-1? > > The original patch was posted here: > http://gcc.gnu.org/ml/gcc-patches/2014-01/msg00286.html > and the glibc patch was approved here: > http://sourceware.org/ml/libc-alpha/2014-01/msg00120.html The glibc patch is now committed and I've just merged that change to the gcc copy. /Marcus
diff --git a/include/longlong.h b/include/longlong.h index 5f00e54..b4c1f400 100644 --- a/include/longlong.h +++ b/include/longlong.h @@ -122,6 +122,22 @@ extern const UQItype __clz_tab[256] attribute_hidden; #define __AND_CLOBBER_CC , "cc" #endif /* __GNUC__ < 2 */ +#if defined (__aarch64__) + +#if W_TYPE_SIZE == 32 +#define count_leading_zeros(COUNT, X) ((COUNT) = __builtin_clz (X)) +#define count_trailing_zeros(COUNT, X) ((COUNT) = __builtin_ctz (X)) +#define COUNT_LEADING_ZEROS_0 32 +#endif /* W_TYPE_SIZE == 32 */ + +#if W_TYPE_SIZE == 64 +#define count_leading_zeros(COUNT, X) ((COUNT) = __builtin_clzll (X)) +#define count_trailing_zeros(COUNT, X) ((COUNT) = __builtin_ctzll (X)) +#define COUNT_LEADING_ZEROS_0 64 +#endif /* W_TYPE_SIZE == 64 */ + +#endif /* __aarch64__ */ + #if defined (__alpha) && W_TYPE_SIZE == 64 #define umul_ppmm(ph, pl, m0, m1) \ do { \