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| author | Richard Henderson <rth@redhat.com> | 2012-03-05 12:12:14 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2012-03-05 12:12:14 -0800 |
| commit | 8993fde43241743b76372651364048d45ce2309e (patch) | |
| tree | 77d460d8d56b319fade9b98a0b799c0597328876 /libgcc | |
| parent | 4999c62c838dde11b309da746a563b684fe325ea (diff) | |
| download | gcc-8993fde43241743b76372651364048d45ce2309e.zip gcc-8993fde43241743b76372651364048d45ce2309e.tar.gz gcc-8993fde43241743b76372651364048d45ce2309e.tar.bz2 | |
arm: Enable umull and ctz in longlong.h
* longlong.h [ARM] (umul_ppmm): Use umull for arm3m and later.
[ARM] (count_trailing_zeros): Use the builtin.
From-SVN: r184957
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 5 | ||||
| -rw-r--r-- | libgcc/longlong.h | 27 |
2 files changed, 26 insertions, 6 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 8415fa7..e2452c1 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,8 @@ +2012-03-05 Richard Henderson <rth@redhat.com> + + * longlong.h [ARM] (umul_ppmm): Use umull for arm3m and later. + [ARM] (count_trailing_zeros): Use the builtin. + 2012-03-01 Kai Tietz <ktietz@redhat.com> * soft-fp: Imported from glibc upstream. diff --git a/libgcc/longlong.h b/libgcc/longlong.h index 30cc2e3..1a839dd 100644 --- a/libgcc/longlong.h +++ b/libgcc/longlong.h @@ -220,9 +220,12 @@ UDItype __umulsidi3 (USItype, USItype); "rI" ((USItype) (bh)), \ "r" ((USItype) (al)), \ "rI" ((USItype) (bl)) __CLOBBER_CC) -#define umul_ppmm(xh, xl, a, b) \ -{register USItype __t0, __t1, __t2; \ - __asm__ ("%@ Inlined umul_ppmm\n" \ +# if defined(__ARM_ARCH_2__) || defined(__ARM_ARCH_2A__) \ + || defined(__ARM_ARCH_3__) +# define umul_ppmm(xh, xl, a, b) \ + do { \ + register USItype __t0, __t1, __t2; \ + __asm__ ("%@ Inlined umul_ppmm\n" \ " mov %2, %5, lsr #16\n" \ " mov %0, %6, lsr #16\n" \ " bic %3, %5, %2, lsl #16\n" \ @@ -239,14 +242,26 @@ UDItype __umulsidi3 (USItype, USItype); "=r" ((USItype) (xl)), \ "=&r" (__t0), "=&r" (__t1), "=r" (__t2) \ : "r" ((USItype) (a)), \ - "r" ((USItype) (b)) __CLOBBER_CC );} -#define UMUL_TIME 20 -#define UDIV_TIME 100 + "r" ((USItype) (b)) __CLOBBER_CC ); \ + } while (0) +# define UMUL_TIME 20 +# else +# define umul_ppmm(xh, xl, a, b) \ + do { \ + /* Generate umull, under compiler control. */ \ + register UDItype __t0 = (UDItype)(USItype)(a) * (USItype)(b); \ + (xl) = (USItype)__t0; \ + (xh) = (USItype)(__t0 >> 32); \ + } while (0) +# define UMUL_TIME 3 +# endif +# define UDIV_TIME 100 #endif /* __arm__ */ #if defined(__arm__) /* Let gcc decide how best to implement count_leading_zeros. */ #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 |