diff options
Diffstat (limited to 'boost/atomic/detail/ops_gcc_x86_dcas.hpp')
| -rw-r--r-- | boost/atomic/detail/ops_gcc_x86_dcas.hpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/boost/atomic/detail/ops_gcc_x86_dcas.hpp b/boost/atomic/detail/ops_gcc_x86_dcas.hpp index 2f51182e5a..e356e8cfbd 100644 --- a/boost/atomic/detail/ops_gcc_x86_dcas.hpp +++ b/boost/atomic/detail/ops_gcc_x86_dcas.hpp @@ -73,6 +73,7 @@ struct gcc_dcas_x86 { #if !defined(BOOST_ATOMIC_DETAIL_NO_ASM_IMPLIED_ZERO_DISPLACEMENTS) #if defined(__PIC__) + uint32_t v_lo = (uint32_t)v; uint32_t scratch; __asm__ __volatile__ ( @@ -84,8 +85,8 @@ struct gcc_dcas_x86 "1: lock; cmpxchg8b %[dest]\n\t" "jne 1b\n\t" "movl %[scratch], %%ebx\n\t" - : [scratch] "=m" (scratch), [dest] "=o" (storage) - : [value_lo] "a" ((uint32_t)v), "c" ((uint32_t)(v >> 32)) + : [scratch] "=m" (scratch), [dest] "=o" (storage), [value_lo] "+a" (v_lo) + : "c" ((uint32_t)(v >> 32)) : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "edx", "memory" ); #else // defined(__PIC__) @@ -103,6 +104,7 @@ struct gcc_dcas_x86 #endif // defined(__PIC__) #else // !defined(BOOST_ATOMIC_DETAIL_NO_ASM_IMPLIED_ZERO_DISPLACEMENTS) #if defined(__PIC__) + uint32_t v_lo = (uint32_t)v; uint32_t scratch; __asm__ __volatile__ ( @@ -115,11 +117,11 @@ struct gcc_dcas_x86 "jne 1b\n\t" "movl %[scratch], %%ebx\n\t" #if !defined(BOOST_ATOMIC_DETAIL_NO_ASM_CONSTRAINT_ALTERNATIVES) - : [scratch] "=m,m" (scratch) - : [value_lo] "a,a" ((uint32_t)v), "c,c" ((uint32_t)(v >> 32)), [dest] "D,S" (&storage) + : [scratch] "=m,m" (scratch), [value_lo] "+a,a" (v_lo) + : "c,c" ((uint32_t)(v >> 32)), [dest] "D,S" (&storage) #else - : [scratch] "=m" (scratch) - : [value_lo] "a" ((uint32_t)v), "c" ((uint32_t)(v >> 32)), [dest] "D" (&storage) + : [scratch] "=m" (scratch), [value_lo] "+a" (v_lo) + : "c" ((uint32_t)(v >> 32)), [dest] "D" (&storage) #endif : BOOST_ATOMIC_DETAIL_ASM_CLOBBER_CC_COMMA "edx", "memory" ); |