spl

commit 902997b570dba4e719de8c989b4ecdf8b0dbb9fb
parent 843c770ef8d59b417de2cd925593ffb03256a457
Author: Brian Swetland <swetland@frotz.net>
Date:   Mon, 30 Jun 2025 15:16:04 -0700

sr32asm: hack for relative branches

Allow @<number> to be used in b/j instructions to reference
instructions relative to the current instruction (forward
or backward)

Diffstat:
M
softrisc32/src/assemble-sr32.c
 | 
7
+++++++

1 file changed, 7 insertions(+), 0 deletions(-)
diff --git a/softrisc32/src/assemble-sr32.c b/softrisc32/src/assemble-sr32.c
@@ -479,6 +479,13 @@ void parse_rel(State *s, unsigned type, uint32_t *i) {
 	case tDOT:
 		*i = -4;
 		break;
+	case tAT:
+		next(s);
+		if ((type == TYPE_PCREL_S16) || (type == TYPE_PCREL_S21)) {
+			expect(s, tNUMBER);
+			*i = (s->num * 4) - 4;
+			break;
+		}
 	default:
 		die("expected address");
 	}