[binutils-gdb] RISC-V: Fix opcode entries of "vmsge{,u}.vx"

[Tsukasa OI <a4lg@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=934ee74bc0d04b866968f3aba0dc16fe7bccb1d9

commit 934ee74bc0d04b866968f3aba0dc16fe7bccb1d9
Author: Tsukasa OI <research_trasio@irq.a4lg.com>
Date:   Sun Aug 6 01:37:05 2023 +0000

    RISC-V: Fix opcode entries of "vmsge{,u}.vx"
    
    Their check_func should be "match_never", not "match_opcode".  The reasons
    this error did not cause any disassembler errors are:
    
    1.  The problem will not reproduce if "no-aliases" is specified
        (because macro instructions are handled as aliases).
    2.  If not, all affected compressed instructions or their aliases
        precede before "vmsge{,u}.vx" macro instructions.
    
    However, it'll easily break if we reorder opcode entries.  This commit
    fixes this issue before the *accident* occurs.
    
    opcodes/ChangeLog:
    
            * riscv-opc.c (riscv_opcodes): Make sure that we never match to
            vmsge{,u}.vx instructions unless specified in the assembler.

Diff:
---
 opcodes/riscv-opc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index 3efab9a407d..f9e5ded3a6e 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -1606,10 +1606,10 @@ const struct riscv_opcode riscv_opcodes[] =
 {"vmsgeu.vi",  0, INSN_CLASS_V,  "Vd,Vu,0Vm", MATCH_VMSEQVV, MASK_VMSEQVV, match_vs1_eq_vs2, INSN_ALIAS },
 {"vmsgeu.vi",  0, INSN_CLASS_V,  "Vd,Vt,VkVm", MATCH_VMSGTUVI, MASK_VMSGTUVI, match_opcode, INSN_ALIAS },
 
-{"vmsge.vx",   0, INSN_CLASS_V, "Vd,Vt,sVm", 0, (int) M_VMSGE, match_opcode, INSN_MACRO },
-{"vmsge.vx",   0, INSN_CLASS_V, "Vd,Vt,s,VM,VT", 0, (int) M_VMSGE, match_opcode, INSN_MACRO },
-{"vmsgeu.vx",  0, INSN_CLASS_V, "Vd,Vt,sVm", 0, (int) M_VMSGEU, match_opcode, INSN_MACRO },
-{"vmsgeu.vx",  0, INSN_CLASS_V, "Vd,Vt,s,VM,VT", 0, (int) M_VMSGEU, match_opcode, INSN_MACRO },
+{"vmsge.vx",   0, INSN_CLASS_V, "Vd,Vt,sVm", 0, (int) M_VMSGE, match_never, INSN_MACRO },
+{"vmsge.vx",   0, INSN_CLASS_V, "Vd,Vt,s,VM,VT", 0, (int) M_VMSGE, match_never, INSN_MACRO },
+{"vmsgeu.vx",  0, INSN_CLASS_V, "Vd,Vt,sVm", 0, (int) M_VMSGEU, match_never, INSN_MACRO },
+{"vmsgeu.vx",  0, INSN_CLASS_V, "Vd,Vt,s,VM,VT", 0, (int) M_VMSGEU, match_never, INSN_MACRO },
 
 {"vminu.vv",   0, INSN_CLASS_V,  "Vd,Vt,VsVm", MATCH_VMINUVV, MASK_VMINUVV, match_opcode, 0},
 {"vminu.vx",   0, INSN_CLASS_V,  "Vd,Vt,sVm", MATCH_VMINUVX, MASK_VMINUVX, match_opcode, 0},