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[ARM]

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Condition the exclusive ops to >= armv6 instead of specific version.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32277 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
François Revol 2009-08-12 14:17:05 +00:00
parent 9e90c30ebd
commit 43da1b4f11
1 changed files with 7 additions and 3 deletions
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10
src/system/libroot/os/arch/arm/atomic.S
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@ -11,7 +11,7 @@
/* int atomic_add(int *value, int increment)
*/
FUNCTION(atomic_add):
#if ARM_ISA_ARMV6 || ARM_ISA_ARMV7
#if __ARM_ARCH__ >= 6
miss1: ldrex r12, [r0]
add r2, r12, r1
strex r3, r2, [r0]
@ -46,7 +46,7 @@ FUNCTION_END(atomic_add)
/* int atomic_and(int *value, int andValue)
*/
FUNCTION(atomic_and):
#if ARM_ISA_ARMV6 || ARM_ISA_ARMV7
#if __ARM_ARCH__ >= 6
miss2: ldrex r12, [r0]
and r2, r12, r1
strex r3, r2, [r0]
@ -79,7 +79,7 @@ FUNCTION_END(atomic_and)
/* int atomic_or(int *value, int orValue)
*/
FUNCTION(atomic_or):
#if ARM_ISA_ARMV6 || ARM_ISA_ARMV7
#if __ARM_ARCH__ >= 6
miss3: ldrex r12, [r0]
eor r2, r12, r1
@ -113,16 +113,19 @@ FUNCTION_END(atomic_or)
/* int atomic_set(int *value, int setTo)
*/
FUNCTION(atomic_set):
#if __ARM_ARCH__ >= 6
miss4: ldrex r12, [r0]
strex r3, r1, [r0]
teq r3, #0
bne miss4
mov pc, lr
#endif
FUNCTION_END(atomic_set)
/* int atomic_test_and_set(int *value, int setTo, int testValue)
*/
FUNCTION(atomic_test_and_set):
#if __ARM_ARCH__ >= 6
/*miss5: ldrex r12, [r0] @ load from the address and mark it exclusive
cmp r12, r2 @ compare the value with the comperand(r2)
strexeq r3, r1, [r0] @ if they were equal, attempt to store the new value (r1)
@ -132,6 +135,7 @@ FUNCTION(atomic_test_and_set):
bne same @ if it succeeded, jump to (same) and return. there is no need to clrex if strex succeeded
differ: clrex @ clrex
same: mov r0, r12*/
#endif
#warning TODO TODO TODO
mov pc, lr
FUNCTION_END(atomic_test_and_set)