diff options
| author | Torbjorn Granlund <tg@gmplib.org> | 2017-03-05 02:55:35 +0100 |
|---|---|---|
| committer | Torbjorn Granlund <tg@gmplib.org> | 2017-03-05 02:55:35 +0100 |
| commit | 223a78b77ad023badccbbaaddbedfd6d43273579 (patch) | |
| tree | d85c9e8cb1f19bd6ea246ef26179314f3df4dc1c /longlong.h | |
| parent | bae004bc088083bf470a386922ff7f9b21d18c97 (diff) | |
| download | gmp-223a78b77ad023badccbbaaddbedfd6d43273579.tar.gz | |
Provide asm-free arm64 umul_ppmm.
Diffstat (limited to 'longlong.h')
| -rw-r--r-- | longlong.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/longlong.h b/longlong.h index d53709ef0..44036082a 100644 --- a/longlong.h +++ b/longlong.h @@ -574,14 +574,25 @@ extern UWtype __MPN(udiv_qrnnd) (UWtype *, UWtype, UWtype, UWtype); __asm__ ("subs\t%1, %x4, %5\n\tsbc\t%0, %x2, %x3" \ : "=r,r" (sh), "=&r,&r" (sl) \ : "rZ,rZ" ((UDItype)(ah)), "rZ,rZ" ((UDItype)(bh)), \ - "r,Z" ((UDItype)(al)), "rI,r" ((UDItype)(bl)) __CLOBBER_CC);\ + "r,Z" ((UDItype)(al)), "rI,r" ((UDItype)(bl)) __CLOBBER_CC);\ } while(0); +#if __GMP_GNUC_PREREQ (4,9) +#define umul_ppmm(w1, w0, u, v) \ + do { \ + typedef unsigned int __ll_UTItype __attribute__((mode(TI))); \ + __ll_UTItype __ll = (__ll_UTItype)(u) * (v); \ + w1 = __ll >> 64; \ + w0 = __ll; \ + } while (0) +#endif +#if !defined (umul_ppmm) #define umul_ppmm(ph, pl, m0, m1) \ do { \ UDItype __m0 = (m0), __m1 = (m1); \ __asm__ ("umulh\t%0, %1, %2" : "=r" (ph) : "r" (__m0), "r" (__m1)); \ (pl) = __m0 * __m1; \ } while (0) +#endif #define count_leading_zeros(count, x) count_leading_zeros_gcc_clz(count, x) #define count_trailing_zeros(count, x) count_trailing_zeros_gcc_ctz(count, x) #define COUNT_LEADING_ZEROS_0 64 |