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Diffstat (limited to 'arch/sparc64/lib/bitops.S')
| -rw-r--r-- | arch/sparc64/lib/bitops.S | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/arch/sparc64/lib/bitops.S b/arch/sparc64/lib/bitops.S new file mode 100644 index 000000000..f964e4550 --- /dev/null +++ b/arch/sparc64/lib/bitops.S @@ -0,0 +1,110 @@ +/* $Id: bitops.S,v 1.1 2000/03/27 10:38:41 davem Exp $ + * bitops.S: Sparc64 atomic bit operations. + * + * Copyright (C) 2000 David S. Miller (davem@redhat.com) + */ + +#include <asm/asi.h> + + .text + .align 64 + .globl __bitops_begin +__bitops_begin: + + .globl __test_and_set_bit +__test_and_set_bit: /* %o0=nr, %o1=addr */ + srlx %o0, 6, %g1 + mov 1, %g5 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %g5, %g2, %g5 + add %o1, %g3, %o1 + ldx [%o1], %g7 +1: andcc %g7, %g5, %o0 + bne,pn %xcc, 2f + xor %g7, %g5, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,a,pn %xcc, 1b + ldx [%o1], %g7 +2: retl + nop + + .globl __test_and_clear_bit +__test_and_clear_bit: /* %o0=nr, %o1=addr */ + srlx %o0, 6, %g1 + mov 1, %g5 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %g5, %g2, %g5 + add %o1, %g3, %o1 + ldx [%o1], %g7 +1: andcc %g7, %g5, %o0 + be,pn %xcc, 2f + xor %g7, %g5, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,a,pn %xcc, 1b + ldx [%o1], %g7 +2: retl + nop + + .globl __test_and_change_bit +__test_and_change_bit: /* %o0=nr, %o1=addr */ + srlx %o0, 6, %g1 + mov 1, %g5 + sllx %g1, 3, %g3 + and %o0, 63, %g2 + sllx %g5, %g2, %g5 + add %o1, %g3, %o1 + ldx [%o1], %g7 +1: and %g7, %g5, %o0 + xor %g7, %g5, %g1 + casx [%o1], %g7, %g1 + cmp %g7, %g1 + bne,a,pn %xcc, 1b + ldx [%o1], %g7 +2: retl + nop + nop + + .globl __test_and_set_le_bit +__test_and_set_le_bit: /* %o0=nr, %o1=addr */ + srlx %o0, 5, %g1 + mov 1, %g5 + sllx %g1, 2, %g3 + and %o0, 31, %g2 + sllx %g5, %g2, %g5 + add %o1, %g3, %o1 + lduwa [%o1] ASI_PL, %g7 +1: andcc %g7, %g5, %o0 + bne,pn %icc, 2f + xor %g7, %g5, %g1 + casa [%o1] ASI_PL, %g7, %g1 + cmp %g7, %g1 + bne,a,pn %icc, 1b + lduwa [%o1] ASI_PL, %g7 +2: retl + nop + + .globl __test_and_clear_le_bit +__test_and_clear_le_bit: /* %o0=nr, %o1=addr */ + srlx %o0, 5, %g1 + mov 1, %g5 + sllx %g1, 2, %g3 + and %o0, 31, %g2 + sllx %g5, %g2, %g5 + add %o1, %g3, %o1 + lduwa [%o1] ASI_PL, %g7 +1: andcc %g7, %g5, %o0 + be,pn %icc, 2f + xor %g7, %g5, %g1 + casa [%o1] ASI_PL, %g7, %g1 + cmp %g7, %g1 + bne,a,pn %icc, 1b + lduwa [%o1] ASI_PL, %g7 +2: retl + nop + + .globl __bitops_end +__bitops_end: |