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Revert "Remove reverse VM instruction"

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This reverts commit 5512353d97.
This commit is contained in:
Jeremy Evans 2022-07-20 12:24:50 -07:00
parent 9f8abd28ba
commit d9167491db
Notes: git 2022-08-10 14:20:08 +09:00
1 changed files with 19 additions and 0 deletions
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19
insns.def
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@ -597,6 +597,25 @@ swap
/* none */
}
/* reverse stack top N order. */
DEFINE_INSN
reverse
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = 0;
{
rb_num_t i;
VALUE *sp = STACK_ADDR_FROM_TOP(n);
for (i=0; i<n/2; i++) {
VALUE v0 = sp[i];
VALUE v1 = TOPN(i);
sp[i] = v1;
TOPN(i) = v0;
}
}
/* for stack caching. */
DEFINE_INSN_IF(STACK_CACHING)
reput