diff options
Diffstat (limited to 'toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106878.patch')
| -rw-r--r-- | toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106878.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106878.patch b/toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106878.patch new file mode 100644 index 0000000000..fc1633d36e --- /dev/null +++ b/toolchain-layer/recipes-devtools/gcc/gcc-4.6/linaro/gcc-4.6-linaro-r106878.patch @@ -0,0 +1,69 @@ +2012-03-08 Michael Hope <michael.hope@linaro.org> + + Backport proposed patch: + + gcc/ + 2012-01-31 Richard Henderson <rth@redhat.com> + + * longlong.h [arm] (umul_ppmm): Use umull. Enable for thumb2. + [arm] (count_trailing_zeros): Use __builtin_ctz. + +=== modified file 'gcc/longlong.h' +--- old/gcc/longlong.h 2011-10-04 07:28:50 +0000 ++++ new/gcc/longlong.h 2012-02-22 01:51:14 +0000 +@@ -203,7 +203,7 @@ + UDItype __umulsidi3 (USItype, USItype); + #endif + +-#if defined (__arm__) && !defined (__thumb__) && W_TYPE_SIZE == 32 ++#if defined (__arm__) && (defined (__thumb2__) || !defined (__thumb__)) && W_TYPE_SIZE == 32 + #define add_ssaaaa(sh, sl, ah, al, bh, bl) \ + __asm__ ("adds %1, %4, %5\n\tadc %0, %2, %3" \ + : "=r" ((USItype) (sh)), \ +@@ -220,9 +220,12 @@ + "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 @@ + "=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 + + |