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- /*
- * mips user level lock code
- */
- #define LL(base, rt) WORD $((060<<26)|((base)<<21)|((rt)<<16))
- #define SC(base, rt) WORD $((070<<26)|((base)<<21)|((rt)<<16))
- #define NOOP WORD $0x27
- TEXT _tas(SB), $0
- TEXT C_4ktas(SB), $0
- MOVV R1, R2 /* address of key */
- tas1:
- MOVW $1, R3
- LL(2, 1)
- NOOP
- SC(2, 3)
- NOOP
- BEQ R3, tas1
- RET
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