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arm: Enable umull and ctz in longlong.h

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* longlong.h [ARM] (umul_ppmm): Use umull for arm3m and later.
        [ARM] (count_trailing_zeros): Use the builtin.

From-SVN: r184957
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Richard Henderson 2012-03-05 12:12:14 -08:00 committed by Richard Henderson
parent 4999c62c83
commit 8993fde432
2 changed files with 26 additions and 6 deletions
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5
libgcc/ChangeLog
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@ -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.

27
libgcc/longlong.h
View File

@ -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