X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=include%2Furcu%2Fuatomic%2Fx86.h;fp=include%2Furcu%2Fuatomic%2Fx86.h;h=e9f2f78275f472618d2ad302205eda8bb37629c8;hp=ec71e5151fa07b4115f5d4b62fce6d7a3e4c30cd;hb=835b9ab3ca3777fe42e37e92096226ebd19ca75b;hpb=6558e7a3b5c0e808a8729bcc046e7639b888c30f diff --git a/include/urcu/uatomic/x86.h b/include/urcu/uatomic/x86.h index ec71e51..e9f2f78 100644 --- a/include/urcu/uatomic/x86.h +++ b/include/urcu/uatomic/x86.h @@ -36,10 +36,14 @@ extern "C" { * Derived from AO_compare_and_swap() and AO_test_and_set_full(). */ -struct __uatomic_dummy { - unsigned long v[10]; -}; -#define __hp(x) ((struct __uatomic_dummy *)(x)) +/* + * The __hp() macro casts the void pointer "x" to a pointer to a structure + * containing an array of char of the specified size. This allows passing the + * @addr arguments of the following inline functions as "m" and "+m" operands + * to the assembly. + */ + +#define __hp(size, x) ((struct { char v[size]; } *)(x)) #define _uatomic_set(addr, v) ((void) CMM_STORE_SHARED(*(addr), (v))) @@ -56,7 +60,7 @@ unsigned long __uatomic_cmpxchg(void *addr, unsigned long old, __asm__ __volatile__( "lock; cmpxchgb %2, %1" - : "+a"(result), "+m"(*__hp(addr)) + : "+a"(result), "+m"(*__hp(len, addr)) : "q"((unsigned char)_new) : "memory"); return result; @@ -67,7 +71,7 @@ unsigned long __uatomic_cmpxchg(void *addr, unsigned long old, __asm__ __volatile__( "lock; cmpxchgw %2, %1" - : "+a"(result), "+m"(*__hp(addr)) + : "+a"(result), "+m"(*__hp(len, addr)) : "r"((unsigned short)_new) : "memory"); return result; @@ -78,7 +82,7 @@ unsigned long __uatomic_cmpxchg(void *addr, unsigned long old, __asm__ __volatile__( "lock; cmpxchgl %2, %1" - : "+a"(result), "+m"(*__hp(addr)) + : "+a"(result), "+m"(*__hp(len, addr)) : "r"((unsigned int)_new) : "memory"); return result; @@ -90,7 +94,7 @@ unsigned long __uatomic_cmpxchg(void *addr, unsigned long old, __asm__ __volatile__( "lock; cmpxchgq %2, %1" - : "+a"(result), "+m"(*__hp(addr)) + : "+a"(result), "+m"(*__hp(len, addr)) : "r"((unsigned long)_new) : "memory"); return result; @@ -123,7 +127,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len) unsigned char result; __asm__ __volatile__( "xchgb %0, %1" - : "=q"(result), "+m"(*__hp(addr)) + : "=q"(result), "+m"(*__hp(len, addr)) : "0" ((unsigned char)val) : "memory"); return result; @@ -133,7 +137,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len) unsigned short result; __asm__ __volatile__( "xchgw %0, %1" - : "=r"(result), "+m"(*__hp(addr)) + : "=r"(result), "+m"(*__hp(len, addr)) : "0" ((unsigned short)val) : "memory"); return result; @@ -143,7 +147,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len) unsigned int result; __asm__ __volatile__( "xchgl %0, %1" - : "=r"(result), "+m"(*__hp(addr)) + : "=r"(result), "+m"(*__hp(len, addr)) : "0" ((unsigned int)val) : "memory"); return result; @@ -154,7 +158,7 @@ unsigned long __uatomic_exchange(void *addr, unsigned long val, int len) unsigned long result; __asm__ __volatile__( "xchgq %0, %1" - : "=r"(result), "+m"(*__hp(addr)) + : "=r"(result), "+m"(*__hp(len, addr)) : "0" ((unsigned long)val) : "memory"); return result; @@ -187,7 +191,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val, __asm__ __volatile__( "lock; xaddb %1, %0" - : "+m"(*__hp(addr)), "+q" (result) + : "+m"(*__hp(len, addr)), "+q" (result) : : "memory"); return result + (unsigned char)val; @@ -198,7 +202,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val, __asm__ __volatile__( "lock; xaddw %1, %0" - : "+m"(*__hp(addr)), "+r" (result) + : "+m"(*__hp(len, addr)), "+r" (result) : : "memory"); return result + (unsigned short)val; @@ -209,7 +213,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val, __asm__ __volatile__( "lock; xaddl %1, %0" - : "+m"(*__hp(addr)), "+r" (result) + : "+m"(*__hp(len, addr)), "+r" (result) : : "memory"); return result + (unsigned int)val; @@ -221,7 +225,7 @@ unsigned long __uatomic_add_return(void *addr, unsigned long val, __asm__ __volatile__( "lock; xaddq %1, %0" - : "+m"(*__hp(addr)), "+r" (result) + : "+m"(*__hp(len, addr)), "+r" (result) : : "memory"); return result + (unsigned long)val; @@ -251,7 +255,7 @@ void __uatomic_and(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; andb %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "iq" ((unsigned char)val) : "memory"); return; @@ -260,7 +264,7 @@ void __uatomic_and(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; andw %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned short)val) : "memory"); return; @@ -269,7 +273,7 @@ void __uatomic_and(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; andl %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned int)val) : "memory"); return; @@ -279,7 +283,7 @@ void __uatomic_and(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; andq %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "er" ((unsigned long)val) : "memory"); return; @@ -307,7 +311,7 @@ void __uatomic_or(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; orb %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "iq" ((unsigned char)val) : "memory"); return; @@ -316,7 +320,7 @@ void __uatomic_or(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; orw %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned short)val) : "memory"); return; @@ -325,7 +329,7 @@ void __uatomic_or(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; orl %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned int)val) : "memory"); return; @@ -335,7 +339,7 @@ void __uatomic_or(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; orq %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "er" ((unsigned long)val) : "memory"); return; @@ -363,7 +367,7 @@ void __uatomic_add(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; addb %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "iq" ((unsigned char)val) : "memory"); return; @@ -372,7 +376,7 @@ void __uatomic_add(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; addw %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned short)val) : "memory"); return; @@ -381,7 +385,7 @@ void __uatomic_add(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; addl %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "ir" ((unsigned int)val) : "memory"); return; @@ -391,7 +395,7 @@ void __uatomic_add(void *addr, unsigned long val, int len) { __asm__ __volatile__( "lock; addq %1, %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : "er" ((unsigned long)val) : "memory"); return; @@ -420,7 +424,7 @@ void __uatomic_inc(void *addr, int len) { __asm__ __volatile__( "lock; incb %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -429,7 +433,7 @@ void __uatomic_inc(void *addr, int len) { __asm__ __volatile__( "lock; incw %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -438,7 +442,7 @@ void __uatomic_inc(void *addr, int len) { __asm__ __volatile__( "lock; incl %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -448,7 +452,7 @@ void __uatomic_inc(void *addr, int len) { __asm__ __volatile__( "lock; incq %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -473,7 +477,7 @@ void __uatomic_dec(void *addr, int len) { __asm__ __volatile__( "lock; decb %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -482,7 +486,7 @@ void __uatomic_dec(void *addr, int len) { __asm__ __volatile__( "lock; decw %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -491,7 +495,7 @@ void __uatomic_dec(void *addr, int len) { __asm__ __volatile__( "lock; decl %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return; @@ -501,7 +505,7 @@ void __uatomic_dec(void *addr, int len) { __asm__ __volatile__( "lock; decq %0" - : "=m"(*__hp(addr)) + : "=m"(*__hp(len, addr)) : : "memory"); return;