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tcg: Clean up tb_jmp_unlink()
Unify the code of this function with tb_jmp_remove_from_list(). Making these functions similar improves their readability. Also this could be a step towards making this function thread-safe. Backports commit f9c5b66f487a04d3747dc6997b1503f9258df945 from qemu
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@ -1043,25 +1043,22 @@ static inline void tb_reset_jump(TranslationBlock *tb, int n)
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/* remove any jumps to the TB */
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/* remove any jumps to the TB */
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static inline void tb_jmp_unlink(TranslationBlock *tb)
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static inline void tb_jmp_unlink(TranslationBlock *tb)
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{
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{
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uintptr_t tb1, tb2;
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TranslationBlock *tb1;
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uintptr_t *ptb, ntb;
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unsigned int n1;
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unsigned int n1;
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tb1 = tb->jmp_list_first;
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ptb = &tb->jmp_list_first;
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for (;;) {
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for (;;) {
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TranslationBlock *tmp_tb;
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ntb = *ptb;
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n1 = tb1 & 3;
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n1 = ntb & 3;
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tb1 = (TranslationBlock *)(ntb & ~3);
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if (n1 == 2) {
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if (n1 == 2) {
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break;
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break;
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}
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}
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tmp_tb = (TranslationBlock *)(tb1 & ~3);
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tb_reset_jump(tb1, n1);
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tb2 = tmp_tb->jmp_list_next[n1];
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*ptb = tb1->jmp_list_next[n1];
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tb_reset_jump(tmp_tb, n1);
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tb1->jmp_list_next[n1] = (uintptr_t)NULL;
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tmp_tb->jmp_list_next[n1] = (uintptr_t)NULL;
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tb1 = tb2;
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}
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}
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assert(((uintptr_t)tb & 3) == 0);
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tb->jmp_list_first = (uintptr_t)tb | 2; /* fail safe */
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}
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}
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/* invalidate one TB */
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/* invalidate one TB */
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