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| author | tege <tege@gmplib.org> | 2008-02-27 15:13:32 +0100 |
|---|---|---|
| committer | tege <tege@gmplib.org> | 2008-02-27 15:13:32 +0100 |
| commit | e829d3fdc0c6e866799e3d1cd10ccf11cd52dbc3 (patch) | |
| tree | 6170d122f4e66e6e78a39ee526a1b79041db6e20 /longlong.h | |
| parent | 062ffb5c58049a5d401d46436aa2b4731c7d54d1 (diff) | |
| download | gmp-e829d3fdc0c6e866799e3d1cd10ccf11cd52dbc3.tar.gz | |
(umul_ppmm) [alpha]: Define using __builtin_alpha_umulh when possible.
(count_trailing_zeros): Force destination register mode.
Diffstat (limited to 'longlong.h')
| -rw-r--r-- | longlong.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/longlong.h b/longlong.h index 369170ddd..4ae8d3988 100644 --- a/longlong.h +++ b/longlong.h @@ -54,8 +54,8 @@ along with this file. If not, see http://www.gnu.org/licenses/. */ /* Define auxiliary asm macros. - 1) umul_ppmm(high_prod, low_prod, multipler, multiplicand) multiplies two - UWtype integers MULTIPLER and MULTIPLICAND, and generates a two UWtype + 1) umul_ppmm(high_prod, low_prod, multiplier, multiplicand) multiplies two + UWtype integers MULTIPLIER and MULTIPLICAND, and generates a two UWtype word product in HIGH_PROD and LOW_PROD. 2) __umulsidi3(a,b) multiplies two UWtype integers A and B, and returns a @@ -175,6 +175,14 @@ along with this file. If not, see http://www.gnu.org/licenses/. */ #if defined (__alpha) && W_TYPE_SIZE == 64 /* Most alpha-based machines, except Cray systems. */ #if defined (__GNUC__) +#if __GMP_GNUC_PREREQ (3,3) +#define umul_ppmm(ph, pl, m0, m1) \ + do { \ + UDItype __m0 = (m0), __m1 = (m1); \ + (ph) = __builtin_alpha_umulh (__m0, __m1); \ + (pl) = __m0 * __m1; \ + } while (0) +#else #define umul_ppmm(ph, pl, m0, m1) \ do { \ UDItype __m0 = (m0), __m1 = (m1); \ @@ -183,6 +191,7 @@ along with this file. If not, see http://www.gnu.org/licenses/. */ : "%rJ" (m0), "rI" (m1)); \ (pl) = __m0 * __m1; \ } while (0) +#endif #define UMUL_TIME 18 #else /* ! __GNUC__ */ #include <machine/builtins.h> @@ -782,7 +791,7 @@ extern UWtype __MPN(udiv_qrnnd) _PROTO ((UWtype *, UWtype, UWtype, UWtype)); #define count_trailing_zeros(count, x) \ do { \ ASSERT ((x) != 0); \ - __asm__ ("bsfl %1,%0" : "=r" (count) : "rm" ((USItype)(x))); \ + __asm__ ("bsfl %1,%k0" : "=r" (count) : "rm" ((USItype)(x))); \ } while (0) #endif /* asm bsfl */ |