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Add comments to getspecial

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John Hawthorn 2021-09-10 14:01:49 -07:00 • committed by Alan Wu
parent bf8557f487
commit fc13ff14a2
1 changed files with 7 additions and 0 deletions
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7
yjit_codegen.c
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@ -3810,6 +3810,9 @@ gen_toregexp(jitstate_t* jit, ctx_t* ctx)
static codegen_status_t
gen_getspecial(jitstate_t *jit, ctx_t *ctx)
{
// This takes two arguments, key and type
// key is only used when type == 0
// A non-zero type determines which type of backref to fetch
rb_num_t key = jit_get_arg(jit, 0);
rb_num_t type = jit_get_arg(jit, 1);
@ -3817,6 +3820,8 @@ gen_getspecial(jitstate_t *jit, ctx_t *ctx)
// not yet implemented
return YJIT_CANT_COMPILE;
} else if (type & 0x01) {
// Fetch a "special" backref based on a char encoded by shifting by 1
// Can raise if matchdata uninitialized
jit_prepare_routine_call(jit, ctx, REG0);
@ -3851,6 +3856,8 @@ gen_getspecial(jitstate_t *jit, ctx_t *ctx)
return YJIT_KEEP_COMPILING;
} else {
// Fetch the N-th match from the last backref based on type shifted by 1
// Can raise if matchdata uninitialized
jit_prepare_routine_call(jit, ctx, REG0);