a4f30ae827
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
48 lines
1.9 KiB
Plaintext
48 lines
1.9 KiB
Plaintext
// ret_resolve_simple.hako — RetResolveSimpleBox
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// Responsibility: Resolve "ret" for a single block instruction segment robustly.
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// Inputs: inst_seg (string of objects), regs (MapBox), last_cmp_dst/val (ints)
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// Output: i64 value or null when no ret is present
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using selfhost.shared.json.utils.json_frag as JsonFragBox
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using selfhost.shared.common.string_helpers as StringHelpers
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using selfhost.shared.json.core.json_cursor as JsonCursorBox
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static box RetResolveSimpleBox {
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_to_i64(s) { return StringHelpers.to_i64(s) }
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_load_reg(regs, id) {
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local v = regs.get("" + id)
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if v == null { return 0 }
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local s = "" + v
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if StringHelpers.is_numeric_str(s) == 1 { return me._to_i64(s) }
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return 0
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}
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// Try explicit op:"ret"
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_resolve_explicit(inst_seg, regs, last_cmp_dst, last_cmp_val) {
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local rpos = inst_seg.indexOf("\"op\":\"ret\"")
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if rpos < 0 { return null }
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local rseg = inst_seg.substring(rpos, inst_seg.length())
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local rid = JsonFragBox.get_int(rseg, "value")
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if rid == null { return null }
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if rid == last_cmp_dst { return last_cmp_val }
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return me._load_reg(regs, rid)
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}
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// Try v1-style {"kind":"Ret","value":N} (no op key)
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_resolve_kind(inst_seg, regs, last_cmp_dst, last_cmp_val) {
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local kpos = inst_seg.indexOf("\"kind\":\"Ret\"")
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if kpos < 0 { return null }
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local kseg = inst_seg.substring(kpos, inst_seg.length())
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local rid = JsonFragBox.get_int(kseg, "value")
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if rid == null { return null }
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if rid == last_cmp_dst { return last_cmp_val }
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return me._load_reg(regs, rid)
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}
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resolve(inst_seg, regs, last_cmp_dst, last_cmp_val) {
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if inst_seg == null { return null }
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local v = me._resolve_explicit(inst_seg, regs, last_cmp_dst, last_cmp_val)
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if v != null { return v }
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return me._resolve_kind(inst_seg, regs, last_cmp_dst, last_cmp_val)
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}
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}
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static box RetResolveSimpleMain { main(args){ return 0 } }
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