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- #include <sys/regdef.h>
- #include <sys/asm.h>
- .globl tas
- .ent tas 2
- tas:
- .set noreorder
- 1:
- ori t1, zero, 12345 /* t1 = 12345 */
- ll t0, (a0) /* t0 = *a0 */
- sc t1, (a0) /* *a0 = t1 if *a0 hasn't changed; t1=success */
- beq t1, zero, 1b /* repeat if *a0 did change */
- nop
- j $31 /* return */
- or v0, t0, zero /* set return value on way out */
- .set reorder
- .end tas
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