disas/riscv: Add rv_codec_vror_vi for vror.vi

Add rv_codec_vror_vi for the vector crypto instruction - vror.vi.
The rotate amount of vror.vi is defined by combining seperated bits.

Signed-off-by: Max Chou <max.chou@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20231026151828.754279-13-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

disas/riscv.c

@@ -4011,6 +4011,12 @@ static uint32_t operand_vzimm10(rv_inst inst)
     return (inst << 34) >> 54;
 }
 
+static uint32_t operand_vzimm6(rv_inst inst)
+{
+    return ((inst << 37) >> 63) << 5 |
+        ((inst << 44) >> 59);
+}
+
 static uint32_t operand_bs(rv_inst inst)
 {
     return (inst << 32) >> 62;
@@ -4393,6 +4399,12 @@ static void decode_inst_operands(rv_decode *dec, rv_isa isa)
         dec->imm = operand_vimm(inst);
         dec->vm = operand_vm(inst);
         break;
+    case rv_codec_vror_vi:
+        dec->rd = operand_rd(inst);
+        dec->rs2 = operand_rs2(inst);
+        dec->imm = operand_vzimm6(inst);
+        dec->vm = operand_vm(inst);
+        break;
     case rv_codec_vsetvli:
         dec->rd = operand_rd(inst);
         dec->rs1 = operand_rs1(inst);
@@ -4677,7 +4689,7 @@ static void format_inst(char *buf, size_t buflen, size_t tab, rv_decode *dec)
             append(buf, tmp, buflen);
             break;
         case 'u':
-            snprintf(tmp, sizeof(tmp), "%u", ((uint32_t)dec->imm & 0b11111));
+            snprintf(tmp, sizeof(tmp), "%u", ((uint32_t)dec->imm & 0b111111));
             append(buf, tmp, buflen);
             break;
         case 'j':

disas/riscv.h

@@ -152,6 +152,7 @@ typedef enum {
     rv_codec_v_i,
     rv_codec_vsetvli,
     rv_codec_vsetivli,
+    rv_codec_vror_vi,
     rv_codec_zcb_ext,
     rv_codec_zcb_mul,
     rv_codec_zcb_lb,