RISC-V: Fix missing instruction classes in error messages

Add 6 missing instruction class cases to riscv_multi_subset_supports_ext()
to provide proper extension names in error messages instead of producing
"internal: unreachable INSN_CLASS_*" errors.

These instruction classes exist in riscv_multi_subset_supports() but were
missing from riscv_multi_subset_supports_ext(), causing the assembler to
produce internal errors when instructions are used without the required
-march specification.

Missing classes added:
- INSN_CLASS_ZABHA_AND_ZACAS (zabha and zacas)
- INSN_CLASS_XVENTANACONDOPS (xventanacondops)
- INSN_CLASS_XSFVCP (xsfvcp)
- INSN_CLASS_XSFVQMACCQOQ (xsfvqmaccqoq)
- INSN_CLASS_XSFVQMACCDOD (xsfvqmaccdod)
- INSN_CLASS_XSFVFNRCLIPXFQF (xsfvfnrclipxfqf)

Before this fix:
  Error: internal: unreachable INSN_CLASS_*
  Error: unrecognized opcode `amocas.b a0,a1,(a2)'

After this fix:
  Error: unrecognized opcode `amocas.b a0,a1,(a2)', extension `zabha' and `zacas' required

bfd/
    * elfxx-riscv.c (riscv_multi_subset_supports_ext): Add 6
    missing instruction class cases.

Signed-off-by: Jerry Zhang Jian <jerry.zhangjian@sifive.com>

diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index 085d77923a01379a0880adc6d2e8b97c10e4a58d..3b92fbed5f03d44cf8abee3a4a56f218071b2578 100644 (file)
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -3128,6 +3128,15 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps,
       return "zabha";
     case INSN_CLASS_ZACAS:
       return "zacas";
+    case INSN_CLASS_ZABHA_AND_ZACAS:
+      if (!riscv_subset_supports (rps, "zabha"))
+       {
+         if (!riscv_subset_supports (rps, "zacas"))
+           return _ ("zabha' and `zacas");
+         else
+           return "zabha";
+       }
+      return "zacas";
     case INSN_CLASS_ZALRSC:
       return "zalrsc";
     case INSN_CLASS_ZAWRS:
@@ -3341,8 +3350,18 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps,
       return "xtheadvdot";
     case INSN_CLASS_XTHEADZVAMO:
       return "xtheadzvamo";
+    case INSN_CLASS_XVENTANACONDOPS:
+      return "xventanacondops";
+    case INSN_CLASS_XSFVCP:
+      return "xsfvcp";
     case INSN_CLASS_XSFCEASE:
       return "xsfcease";
+    case INSN_CLASS_XSFVQMACCQOQ:
+      return "xsfvqmaccqoq";
+    case INSN_CLASS_XSFVQMACCDOD:
+      return "xsfvqmaccdod";
+    case INSN_CLASS_XSFVFNRCLIPXFQF:
+      return "xsfvfnrclipxfqf";
     default:
       rps->error_handler
         (_("internal: unreachable INSN_CLASS_*"));