[PATCH v2 4/8] RISC-V: Fix disassembling Zfinx with -M numeric

[Tsukasa OI <research_trasio@irq.a4lg.com>]

This commit fixes floating point operand register names from ABI ones
to dynamically set ones.

gas/ChangeLog:

	* testsuite/gas/riscv/zfinx-dis-numeric.s: Test new behavior of
	Zfinx extension and -M numeric disassembler option.
	* testsuite/gas/riscv/zfinx-dis-numeric.d: Likewise.

opcodes/ChangeLog:

	* riscv-dis.c (riscv_disassemble_insn): Use dynamically set GPR
	names to disassemble Zfinx instructions.
---
 gas/testsuite/gas/riscv/zfinx-dis-numeric.d | 10 ++++++++++
 gas/testsuite/gas/riscv/zfinx-dis-numeric.s |  2 ++
 opcodes/riscv-dis.c                         |  2 +-
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 gas/testsuite/gas/riscv/zfinx-dis-numeric.d
 create mode 100644 gas/testsuite/gas/riscv/zfinx-dis-numeric.s

diff --git a/gas/testsuite/gas/riscv/zfinx-dis-numeric.d b/gas/testsuite/gas/riscv/zfinx-dis-numeric.d
new file mode 100644
index 00000000000..ba3f62295eb
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zfinx-dis-numeric.d
@@ -0,0 +1,10 @@
+#as: -march=rv64ima_zfinx
+#source: zfinx-dis-numeric.s
+#objdump: -dr -Mnumeric
+
+.*:[ 	]+file format .*
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ 	]+[0-9a-f]+:[ 	]+a0c5a553[ 	]+feq.s[ 	]+x10,x11,x12
diff --git a/gas/testsuite/gas/riscv/zfinx-dis-numeric.s b/gas/testsuite/gas/riscv/zfinx-dis-numeric.s
new file mode 100644
index 00000000000..b55cbd56b21
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zfinx-dis-numeric.s
@@ -0,0 +1,2 @@
+target:
+	feq.s	a0, a1, a2
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index 9ff31167775..164fd209dbd 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -639,7 +639,7 @@ riscv_disassemble_insn (bfd_vma memaddr, insn_t word, disassemble_info *info)
 
       /* If arch has ZFINX flags, use gpr for disassemble.  */
       if(riscv_subset_supports (&riscv_rps_dis, "zfinx"))
-	riscv_fpr_names = riscv_gpr_names_abi;
+	riscv_fpr_names = riscv_gpr_names;
 
       for (; op->name; op++)
 	{
-- 
2.25.1