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-rw-r--r--usr.bin/oasm/include/oasm/lex.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/usr.bin/oasm/include/oasm/lex.h b/usr.bin/oasm/include/oasm/lex.h
index 1bb8641..2811ca3 100644
--- a/usr.bin/oasm/include/oasm/lex.h
+++ b/usr.bin/oasm/include/oasm/lex.h
@@ -119,4 +119,35 @@ struct oasm_token {
int lex_tok(struct oasm_state *state, struct oasm_token *ttp);
+
+/*
+ * Check if a token is an X<n> register.
+ * Returns true on match.
+ */
+__always_inline static inline bool
+tok_is_xreg(tt_t tok)
+{
+ switch (tok) {
+ case TT_X0:
+ case TT_X1:
+ case TT_X2:
+ case TT_X3:
+ case TT_X4:
+ case TT_X5:
+ case TT_X6:
+ case TT_X7:
+ case TT_X8:
+ case TT_X9:
+ case TT_X10:
+ case TT_X11:
+ case TT_X12:
+ case TT_X13:
+ case TT_X14:
+ case TT_X15:
+ return true;
+ }
+
+ return false;
+}
+
#endif /* !_OASM_LEX_H_ */