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w6c+selfhost: cgen N_CAST signed narrow + peel !T on unsigned narrow

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TY_RUNE excluded — wwstage primsize skips it; task #5 will collapse
both gates back to symmetric once type_isunsigned recurses TY_ENUM.
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Hojun-Cho
2026-05-13 20:06:24 +09:00
parent 777c951fab
commit 388ab8a707
14 changed files with 421 additions and 32 deletions
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selfhost/cmd/w6a/parse.ww
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@@ -37,6 +37,7 @@ fn opcodelookup(p: *u8, n: u64) i32 = {
if (streqlit(p, n, "MOVZWQ")) { return A_MOVZWQ; };
if (streqlit(p, n, "MOVSXD")) { return A_MOVSXD; };
if (streqlit(p, n, "MOVSWQ")) { return A_MOVSWQ; };
if (streqlit(p, n, "MOVSBQ")) { return A_MOVSBQ; };
if (streqlit(p, n, "MOVSD")) { return A_MOVSD; };
if (streqlit(p, n, "ADDSD")) { return A_ADDSD; };
if (streqlit(p, n, "SUBSD")) { return A_SUBSD; };