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| author | tege <tege@gmplib.org> | 2001-02-26 12:44:09 +0100 |
|---|---|---|
| committer | tege <tege@gmplib.org> | 2001-02-26 12:44:09 +0100 |
| commit | d09cd6e8d3b5ea0839b90c7ec277f390752c9d1c (patch) | |
| tree | b099efba39e96121428c4a146773d335f8e28c05 /longlong.h | |
| parent | 1508d4a287b9cdb7349b980a50ad6e63a6664798 (diff) | |
| download | gmp-d09cd6e8d3b5ea0839b90c7ec277f390752c9d1c.tar.gz | |
(arm): Optimize sub_ddmmss by testing for constant operands.
Diffstat (limited to 'longlong.h')
| -rw-r--r-- | longlong.h | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/longlong.h b/longlong.h index 87e458902..346486d4c 100644 --- a/longlong.h +++ b/longlong.h @@ -252,7 +252,7 @@ extern UWtype __MPN(udiv_qrnnd) _PROTO ((UWtype, UWtype, UWtype, UWtype *)); : "%r" (ah), "rI" (bh), "%r" (al), "rI" (bl)) #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ __asm__ ("sub %1,%4,%5\n\tsubc %0,%2,%3" \ - : "=r" (sh), "=&r" (sl) \ + : "=r" (sh), "=&r" (sl) \ : "r" (ah), "rI" (bh), "r" (al), "rI" (bl)) #define umul_ppmm(xh, xl, m0, m1) \ do { \ @@ -300,9 +300,45 @@ extern UWtype __MPN(udiv_qrnnd) _PROTO ((UWtype, UWtype, UWtype, UWtype *)); : "=r" (sh), "=&r" (sl) \ : "%r" (ah), "rI" (bh), "%r" (al), "rI" (bl) __CLOBBER_CC) #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ - __asm__ ("subs\t%1, %4, %5\n\tsbc\t%0, %2, %3" \ - : "=r" (sh), "=&r" (sl) \ - : "r" (ah), "rI" (bh), "r" (al), "rI" (bl) __CLOBBER_CC) + do { \ + if (__builtin_constant_p (al)) \ + { \ + if (__builtin_constant_p (ah)) \ + __asm__ ("rsbs\t%1, %5, %4\n\trsc\t%0, %3, %2" \ + : "=r" (sh), "=&r" (sl) \ + : "rI" (ah), "r" (bh), "rI" (al), "r" (bl) __CLOBBER_CC); \ + else \ + __asm__ ("rsbs\t%1, %5, %4\n\tsbc\t%0, %2, %3" \ + : "=r" (sh), "=&r" (sl) \ + : "r" (ah), "rI" (bh), "rI" (al), "r" (bl) __CLOBBER_CC); \ + } \ + else if (__builtin_constant_p (ah)) \ + { \ + if (__builtin_constant_p (bl)) \ + __asm__ ("subs\t%1, %4, %5\n\trsc\t%0, %3, %2" \ + : "=r" (sh), "=&r" (sl) \ + : "rI" (ah), "r" (bh), "r" (al), "rI" (bl) __CLOBBER_CC); \ + else \ + __asm__ ("rsbs\t%1, %5, %4\n\trsc\t%0, %3, %2" \ + : "=r" (sh), "=&r" (sl) \ + : "rI" (ah), "r" (bh), "rI" (al), "r" (bl) __CLOBBER_CC); \ + } \ + else if (__builtin_constant_p (bl)) \ + { \ + if (__builtin_constant_p (bh)) \ + __asm__ ("subs\t%1, %4, %5\n\tsbc\t%0, %2, %3" \ + : "=r" (sh), "=&r" (sl) \ + : "r" (ah), "rI" (bh), "r" (al), "rI" (bl) __CLOBBER_CC); \ + else \ + __asm__ ("subs\t%1, %4, %5\n\trsc\t%0, %3, %2" \ + : "=r" (sh), "=&r" (sl) \ + : "rI" (ah), "r" (bh), "r" (al), "rI" (bl) __CLOBBER_CC); \ + } \ + else /* only bh might be a constant */ \ + __asm__ ("subs\t%1, %4, %5\n\tsbc\t%0, %2, %3" \ + : "=r" (sh), "=&r" (sl) \ + : "r" (ah), "rI" (bh), "r" (al), "rI" (bl) __CLOBBER_CC);\ + } while (0) #if 1 || defined (__arm_m__) /* `M' series has widening multiply support */ #define umul_ppmm(xh, xl, a, b) \ __asm__ ("umull %0,%1,%2,%3" : "=&r" (xl), "=&r" (xh) : "r" (a), "r" (b)) |