diff options
| author | Torbjorn Granlund <tg@gmplib.org> | 2017-02-25 00:00:30 +0100 |
|---|---|---|
| committer | Torbjorn Granlund <tg@gmplib.org> | 2017-02-25 00:00:30 +0100 |
| commit | 2a8fe27b24a489813952ef31c23fc7ddf625519f (patch) | |
| tree | d503498fa631838fb421f1c760c3924d375943b1 /longlong.h | |
| parent | 5d026cd9e838ecb4826d4506cad5987466571aff (diff) | |
| download | gmp-2a8fe27b24a489813952ef31c23fc7ddf625519f.tar.gz | |
(arm32/arm64 add_sssaaaa): Use "subs" for some immediates.
(arm32/arm64 sub_sssaaaa): Use "adds" for some immediates.
Diffstat (limited to 'longlong.h')
| -rw-r--r-- | longlong.h | 48 |
1 files changed, 37 insertions, 11 deletions
diff --git a/longlong.h b/longlong.h index c810fce2d..03f4fe42f 100644 --- a/longlong.h +++ b/longlong.h @@ -1,6 +1,6 @@ /* longlong.h -- definitions for mixed size 32/64 bit arithmetic. -Copyright 1991-1994, 1996, 1997, 1999-2005, 2007-2009, 2011-2016 Free Software +Copyright 1991-1994, 1996, 1997, 1999-2005, 2007-2009, 2011-2017 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -440,9 +440,19 @@ long __MPN(count_leading_zeros) (UDItype); #if defined (__arm__) && (defined (__thumb2__) || !defined (__thumb__)) \ && W_TYPE_SIZE == 32 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \ - __asm__ ("adds\t%1, %4, %5\n\tadc\t%0, %2, %3" \ + do { \ + if (__builtin_constant_p (bl) && (bl) < 0 && (-(USItype) (bl) < 0x1000)) \ + __asm__ ("subs\t%1, %4, %5\n\tadc\t%0, %2, %3" \ + : "=r" (sh), "=&r" (sl) \ + : "r" (ah), "rI" (bh), \ + "%r" (al), "rI" (-(USItype)(bl)) __CLOBBER_CC); \ + else \ + __asm__ ("adds\t%1, %4, %5\n\tadc\t%0, %2, %3" \ : "=r" (sh), "=&r" (sl) \ - : "r" (ah), "rI" (bh), "%r" (al), "rI" (bl) __CLOBBER_CC) + : "r" (ah), "rI" (bh), "%r" (al), "rI" (bl) __CLOBBER_CC); \ + } while (0) +/* FIXME: Extend the immediate range for the low word by using both + ADDS and SUBS, since they set carry in the same way. */ #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ do { \ if (__builtin_constant_p (al)) \ @@ -541,15 +551,31 @@ extern UWtype __MPN(udiv_qrnnd) (UWtype *, UWtype, UWtype, UWtype); /* FIXME: Extend the immediate range for the low word by using both ADDS and SUBS, since they set carry in the same way. */ #define add_ssaaaa(sh, sl, ah, al, bh, bl) \ - __asm__ ("adds\t%1, %x4, %5\n\tadc\t%0, %x2, %x3" \ - : "=r" (sh), "=&r" (sl) \ - : "rZ" ((UDItype)(ah)), "rZ" ((UDItype)(bh)), \ - "%r" ((UDItype)(al)), "rI" ((UDItype)(bl)) __CLOBBER_CC) + do { \ + if (__builtin_constant_p (bl) && (bl) < 0 && (-(UDItype) (bl) < 0x1000)) \ + __asm__ ("subs\t%1, %x4, %5\n\tadc\t%0, %x2, %x3" \ + : "=r" (sh), "=&r" (sl) \ + : "rZ" ((UDItype)(ah)), "rZ" ((UDItype)(bh)), \ + "%r" ((UDItype)(al)), "rI" (-(UDItype)(bl)) __CLOBBER_CC);\ + else \ + __asm__ ("adds\t%1, %x4, %5\n\tadc\t%0, %x2, %x3" \ + : "=r" (sh), "=&r" (sl) \ + : "rZ" ((UDItype)(ah)), "rZ" ((UDItype)(bh)), \ + "%r" ((UDItype)(al)), "rI" ((UDItype)(bl)) __CLOBBER_CC);\ + } while (0) #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ - __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) + do { \ + if (__builtin_constant_p (bl) && (bl) < 0 && (-(UDItype) (bl) < 0x1000)) \ + __asm__ ("adds\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);\ + else \ + __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);\ + } while(0); #define umul_ppmm(ph, pl, m0, m1) \ do { \ UDItype __m0 = (m0), __m1 = (m1); \ |