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

TY_RUNE excluded — wwstage primsize skips it; task #5 will collapse both gates back to symmetric once type_isunsigned recurses TY_ENUM.
2026-05-13 20:06:24 +09:00
parent 777c951fab
commit 388ab8a707
14 changed files with 421 additions and 32 deletions
--- a/cmd/w6a/parse.c
+++ b/cmd/w6a/parse.c
@@ -86,6 +86,7 @@ opcode_lookup(const char *m)
 		{ "MOVW", A_MOVW }, { "MOVB", A_MOVB },
 		{ "MOVZBQ", A_MOVZBQ }, { "MOVZWQ", A_MOVZWQ },
 		{ "MOVSXD", A_MOVSXD }, { "MOVSWQ", A_MOVSWQ },
+		{ "MOVSBQ", A_MOVSBQ },
 		{ "MOVSD", A_MOVSD },
 		{ "ADDSD", A_ADDSD },{ "SUBSD", A_SUBSD },
 		{ "MULSD", A_MULSD },{ "DIVSD", A_DIVSD },