diff options
Diffstat (limited to 'gcc/config/mips/mips.h')
| -rw-r--r-- | gcc/config/mips/mips.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h index 3a0e58c96e6..cda433aa4f0 100644 --- a/gcc/config/mips/mips.h +++ b/gcc/config/mips/mips.h @@ -2906,6 +2906,30 @@ while (0) /* Return an asm string that atomically: + - Given that %2 contains a bit mask and %3 the inverted mask and + that %4 and %5 have already been ANDed with $2. + + - Compares the bits in memory reference %1 selected by mask %2 to + register %4 and, if they are equal, changes the selected bits + in memory to %5. + + - Sets register %0 to the old value of memory reference %1. + */ +#define MIPS_COMPARE_AND_SWAP_12 \ + "%(%<%[%|sync\n" \ + "1:\tll\t%0,%1\n" \ + "\tand\t%@,%0,%2\n" \ + "\tbne\t%@,%4,2f\n" \ + "\tand\t%@,%0,%3\n" \ + "\tor\t%@,%@,%5\n" \ + "\tsc\t%@,%1\n" \ + "\tbeq\t%@,%.,1b\n" \ + "\tnop\n" \ + "\tsync%-%]%>%)\n" \ + "2:\n" + +/* Return an asm string that atomically: + - Sets memory reference %0 to %0 INSN %1. SUFFIX is the suffix that should be added to "ll" and "sc" |