[PATCH v2 37/52] disas/riscv: Reject all of OP-32 and OP-IMM-32 for RV32

These entire base opcodes are RV64.  Reject them all at once
rather than one at a time.

Reviewed-by: Alistair Francis <[email protected]>
Signed-off-by: Richard Henderson <[email protected]>
---
 disas/riscv.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/disas/riscv.c b/disas/riscv.c
index 75c2fa11e6..e650ad7688 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -3311,6 +3311,10 @@ static const rv_opcode_data *decode_inst_opcode(rv_decode *dec, rv_isa isa)
             }
             break;
         case 6:
+            /* OP-IMM-32 */
+            if (isa == rv32) {
+                break;
+            }
             switch ((inst >> 12) & 0b111) {
             case 0: op = rv_op_addiw; break;
             case 1:
@@ -3557,6 +3561,10 @@ static const rv_opcode_data *decode_inst_opcode(rv_decode *dec, rv_isa isa)
             break;
         case 13: op = rv_op_lui; break;
         case 14:
+            /* OP-32 */
+            if (isa == rv32) {
+                break;
+            }
             switch (((inst >> 22) & 0b1111111000) |
                     ((inst >> 12) & 0b0000000111)) {
             case 0: op = rv_op_addw; break;
-- 
2.43.0