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| author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
|---|---|---|
| committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
| commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
| tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/sparc/lib/bitops.S | |
| parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
| parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/sparc/lib/bitops.S')
| -rw-r--r-- | arch/sparc/lib/bitops.S | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/arch/sparc/lib/bitops.S b/arch/sparc/lib/bitops.S new file mode 100644 index 00000000..3dc61d55 --- /dev/null +++ b/arch/sparc/lib/bitops.S @@ -0,0 +1,141 @@ +/* bitops.S: Sparc64 atomic bit operations. + * + * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) + */ + +#include <asm/asi.h> +#include <asm/backoff.h> + + .text + + .globl test_and_set_bit + .type test_and_set_bit,#function +test_and_set_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + or %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size test_and_set_bit, .-test_and_set_bit + + .globl test_and_clear_bit + .type test_and_clear_bit,#function +test_and_clear_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + andn %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size test_and_clear_bit, .-test_and_clear_bit + + .globl test_and_change_bit + .type test_and_change_bit,#function +test_and_change_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + xor %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + and %g7, %o2, %g2 + clr %o0 + movrne %g2, 1, %o0 + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size test_and_change_bit, .-test_and_change_bit + + .globl set_bit + .type set_bit,#function +set_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + or %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size set_bit, .-set_bit + + .globl clear_bit + .type clear_bit,#function +clear_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + andn %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size clear_bit, .-clear_bit + + .globl change_bit + .type change_bit,#function +change_bit: /* %o0=nr, %o1=addr */ + BACKOFF_SETUP(%o3) + srlx %o0, 6, %g1 + mov 1, %o2 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %o2, %g2, %o2 + add %o1, %g3, %o1 +1: ldx [%o1], %g7 + xor %g7, %o2, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,pn %xcc, BACKOFF_LABEL(2f, 1b) + nop + retl + nop +2: BACKOFF_SPIN(%o3, %o4, 1b) + .size change_bit, .-change_bit |