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Last change
on this file since 620 was 571, checked in by meunier, 13 years ago |
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Correction of the "double barrier" problem from the user point of view for the generated llsc tests (use of 2 distinct barriers)
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File size:
791 bytes
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| 1 |
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| 2 | #include "functions.h"
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| 3 |
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| 4 | void take_lock(volatile int * plock) {
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| 5 | volatile int * _plock = plock;
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| 6 | __asm__ __volatile__ (
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| 7 | "move $16, %0 \n"
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| 8 | "giet_lock_try : \n"
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| 9 | "lw $2, 0($16) \n"
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| 10 | "ll $2, 0($16) \n"
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| 11 | "bnez $2, giet_lock_try \n"
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| 12 | "li $3, 1 \n"
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| 13 | "sc $3, 0($16) \n"
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| 14 | "beqz $3, giet_lock_try \n"
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| 15 | "nop \n"
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| 16 | "giet_lock_ok: \n"
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| 17 | "nop \n"
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| 18 | :
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| 19 | :"r" (_plock)
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| 20 | :"$2", "$3", "$4", "$16");
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| 21 | }
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| 22 |
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| 23 |
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| 24 | void release_lock(volatile int * plock) {
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| 25 | asm volatile("\tsync\n");
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| 26 | *plock = 0;
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| 27 | }
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| 28 |
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| 29 |
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