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Diffstat (limited to 'sysdeps/unix/sysv/linux/sh/atomic-machine.h')
-rw-r--r--sysdeps/unix/sysv/linux/sh/atomic-machine.h376
1 files changed, 1 insertions, 375 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/atomic-machine.h b/sysdeps/unix/sysv/linux/sh/atomic-machine.h
index fc37d6d..95d6561 100644
--- a/sysdeps/unix/sysv/linux/sh/atomic-machine.h
+++ b/sysdeps/unix/sysv/linux/sh/atomic-machine.h
@@ -17,381 +17,7 @@
<https://www.gnu.org/licenses/>. */
#define __HAVE_64B_ATOMICS 0
-#define USE_ATOMIC_COMPILER_BUILTINS 0
+#define USE_ATOMIC_COMPILER_BUILTINS 1
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 1
-
-/* SH kernel has implemented a gUSA ("g" User Space Atomicity) support
- for the user space atomicity. The atomicity macros use this scheme.
-
- Reference:
- Niibe Yutaka, "gUSA: Simple and Efficient User Space Atomicity
- Emulation with Little Kernel Modification", Linux Conference 2002,
- Japan. http://lc.linux.or.jp/lc2002/papers/niibe0919h.pdf (in
- Japanese).
-
- B.N. Bershad, D. Redell, and J. Ellis, "Fast Mutual Exclusion for
- Uniprocessors", Proceedings of the Fifth Architectural Support for
- Programming Languages and Operating Systems (ASPLOS), pp. 223-233,
- October 1992. http://www.cs.washington.edu/homes/bershad/Papers/Rcs.ps
-
- SuperH ABI:
- r15: -(size of atomic instruction sequence) < 0
- r0: end point
- r1: saved stack pointer
-*/
-
-#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
- ({ __typeof (*(mem)) __result; \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%1,%0\n\
- cmp/eq %0,%3\n\
- bf 1f\n\
- mov.b %2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__result) : "u" (mem), "u" (newval), "u" (oldval) \
- : "r0", "r1", "t", "memory"); \
- __result; })
-
-#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
- ({ __typeof (*(mem)) __result; \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- mov #-8,r15\n\
- 0: mov.w @%1,%0\n\
- cmp/eq %0,%3\n\
- bf 1f\n\
- mov.w %2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__result) : "u" (mem), "u" (newval), "u" (oldval) \
- : "r0", "r1", "t", "memory"); \
- __result; })
-
-#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
- ({ __typeof (*(mem)) __result; \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%1,%0\n\
- cmp/eq %0,%3\n\
- bf 1f\n\
- mov.l %2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__result) : "u" (mem), "u" (newval), "u" (oldval) \
- : "r0", "r1", "t", "memory"); \
- __result; })
-
-/* XXX We do not really need 64-bit compare-and-exchange. At least
- not in the moment. Using it would mean causing portability
- problems since not many other 32-bit architectures have support for
- such an operation. So don't define any code for now. */
-
-# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
- (abort (), (__typeof (*mem)) 0)
-
-#define atomic_exchange_and_add(mem, value) \
- ({ __typeof (*(mem)) __result, __tmp, __value = (value); \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%2,%0\n\
- mov %1,r2\n\
- add %0,r2\n\
- mov.b r2,@%2\n\
- 1: mov r1,r15"\
- : "=&r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%2,%0\n\
- mov %1,r2\n\
- add %0,r2\n\
- mov.w r2,@%2\n\
- 1: mov r1,r15"\
- : "=&r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%2,%0\n\
- mov %1,r2\n\
- add %0,r2\n\
- mov.l r2,@%2\n\
- 1: mov r1,r15"\
- : "=&r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else \
- { \
- __typeof (mem) memp = (mem); \
- do \
- __result = *memp; \
- while (__arch_compare_and_exchange_val_64_acq \
- (memp, __result + __value, __result) == __result); \
- (void) __value; \
- } \
- __result; })
-
-#define atomic_add(mem, value) \
- (void) ({ __typeof (*(mem)) __tmp, __value = (value); \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%1,r2\n\
- add %0,r2\n\
- mov.b r2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__tmp) : "u" (mem), "0" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%1,r2\n\
- add %0,r2\n\
- mov.w r2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__tmp) : "u" (mem), "0" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%1,r2\n\
- add %0,r2\n\
- mov.l r2,@%1\n\
- 1: mov r1,r15"\
- : "=&r" (__tmp) : "u" (mem), "0" (__value) \
- : "r0", "r1", "r2", "memory"); \
- else \
- { \
- __typeof (*(mem)) oldval; \
- __typeof (mem) memp = (mem); \
- do \
- oldval = *memp; \
- while (__arch_compare_and_exchange_val_64_acq \
- (memp, oldval + __value, oldval) == oldval); \
- (void) __value; \
- } \
- })
-
-#define atomic_add_negative(mem, value) \
- ({ unsigned char __result; \
- __typeof (*(mem)) __tmp, __value = (value); \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%2,r2\n\
- add %1,r2\n\
- mov.b r2,@%2\n\
- 1: mov r1,r15\n\
- shal r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%2,r2\n\
- add %1,r2\n\
- mov.w r2,@%2\n\
- 1: mov r1,r15\n\
- shal r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%2,r2\n\
- add %1,r2\n\
- mov.l r2,@%2\n\
- 1: mov r1,r15\n\
- shal r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else \
- abort (); \
- __result; })
-
-#define atomic_add_zero(mem, value) \
- ({ unsigned char __result; \
- __typeof (*(mem)) __tmp, __value = (value); \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%2,r2\n\
- add %1,r2\n\
- mov.b r2,@%2\n\
- 1: mov r1,r15\n\
- tst r2,r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%2,r2\n\
- add %1,r2\n\
- mov.w r2,@%2\n\
- 1: mov r1,r15\n\
- tst r2,r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%2,r2\n\
- add %1,r2\n\
- mov.l r2,@%2\n\
- 1: mov r1,r15\n\
- tst r2,r2\n\
- movt %0"\
- : "=r" (__result), "=&r" (__tmp) : "u" (mem), "1" (__value) \
- : "r0", "r1", "r2", "t", "memory"); \
- else \
- abort (); \
- __result; })
-
-#define atomic_increment_and_test(mem) atomic_add_zero((mem), 1)
-#define atomic_decrement_and_test(mem) atomic_add_zero((mem), -1)
-
-#define atomic_bit_set(mem, bit) \
- (void) ({ unsigned int __mask = 1 << (bit); \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%0,r2\n\
- or %1,r2\n\
- mov.b r2,@%0\n\
- 1: mov r1,r15"\
- : : "u" (mem), "u" (__mask) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%0,r2\n\
- or %1,r2\n\
- mov.w r2,@%0\n\
- 1: mov r1,r15"\
- : : "u" (mem), "u" (__mask) \
- : "r0", "r1", "r2", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- mov r15,r1\n\
- .align 2\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%0,r2\n\
- or %1,r2\n\
- mov.l r2,@%0\n\
- 1: mov r1,r15"\
- : : "u" (mem), "u" (__mask) \
- : "r0", "r1", "r2", "memory"); \
- else \
- abort (); \
- })
-
-#define atomic_bit_test_set(mem, bit) \
- ({ unsigned int __mask = 1 << (bit); \
- unsigned int __result = __mask; \
- if (sizeof (*(mem)) == 1) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.b @%2,r2\n\
- mov r2,r3\n\
- or %1,r2\n\
- mov.b r2,@%2\n\
- 1: mov r1,r15\n\
- and r3,%0"\
- : "=&r" (__result), "=&r" (__mask) \
- : "u" (mem), "0" (__result), "1" (__mask) \
- : "r0", "r1", "r2", "r3", "memory"); \
- else if (sizeof (*(mem)) == 2) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.w @%2,r2\n\
- mov r2,r3\n\
- or %1,r2\n\
- mov.w %1,@%2\n\
- 1: mov r1,r15\n\
- and r3,%0"\
- : "=&r" (__result), "=&r" (__mask) \
- : "u" (mem), "0" (__result), "1" (__mask) \
- : "r0", "r1", "r2", "r3", "memory"); \
- else if (sizeof (*(mem)) == 4) \
- __asm __volatile ("\
- mova 1f,r0\n\
- .align 2\n\
- mov r15,r1\n\
- mov #(0f-1f),r15\n\
- 0: mov.l @%2,r2\n\
- mov r2,r3\n\
- or r2,%1\n\
- mov.l %1,@%2\n\
- 1: mov r1,r15\n\
- and r3,%0"\
- : "=&r" (__result), "=&r" (__mask) \
- : "u" (mem), "0" (__result), "1" (__mask) \
- : "r0", "r1", "r2", "r3", "memory"); \
- else \
- abort (); \
- __result; })
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