diff --git a/gas/testsuite/gas/loongarch/64_pcrel.d b/gas/testsuite/gas/loongarch/64_pcrel.d
index 66b80a397fa..642e3079668 100644
--- a/gas/testsuite/gas/loongarch/64_pcrel.d
+++ b/gas/testsuite/gas/loongarch/64_pcrel.d
@@ -7,5 +7,5 @@
 Disassembly of section .text:
 
 00000000.* <.text>:
-[ 	]+0:[ 	]+03400000[ 	]+nop[ 	]+
+[ 	]+0:[ 	]+03400000[ 	]+nop
 [ 	]+0:[ 	]+R_LARCH_64_PCREL[ 	]+\*ABS\*
diff --git a/gas/testsuite/gas/loongarch/deprecated_reg_aliases.d b/gas/testsuite/gas/loongarch/deprecated_reg_aliases.d
index 3ea0806765f..01e593fbed0 100644
--- a/gas/testsuite/gas/loongarch/deprecated_reg_aliases.d
+++ b/gas/testsuite/gas/loongarch/deprecated_reg_aliases.d
@@ -15,4 +15,4 @@ Disassembly of section .text:
 [ 	]+8:[ 	]+16024685[ 	]+lu32i\.d[ 	]+\$a1, 4660
 [ 	]+c:[ 	]+08200420[ 	]+fmadd\.d[ 	]+\$fa0, \$fa1, \$fa1, \$fa0
 [ 	]+10:[ 	]+380c16a4[ 	]+ldx\.d[ 	]+\$a0, \$r21, \$a1
-[ 	]+14:[ 	]+4c000020[ 	]+ret[ 	]+
+[ 	]+14:[ 	]+4c000020[ 	]+ret
diff --git a/gas/testsuite/gas/loongarch/jmp_op.d b/gas/testsuite/gas/loongarch/jmp_op.d
index cc544f11ca3..21576072aab 100644
--- a/gas/testsuite/gas/loongarch/jmp_op.d
+++ b/gas/testsuite/gas/loongarch/jmp_op.d
@@ -7,7 +7,7 @@
 Disassembly of section .text:
 
 00000000.* <.L1>:
-[ 	]+0:[ 	]+03400000[ 	]+nop[ 	]+
+[ 	]+0:[ 	]+03400000[ 	]+nop
 [ 	]+4:[ 	]+63fffc04[ 	]+bgtz[ 	]+\$a0,[ 	]+-4[ 	]+#[ 	]+0[ 	]+<\.L1>
 [ 	]+4:[ 	]+R_LARCH_B16[ 	]+\.L1
 [ 	]+8:[ 	]+67fff880[ 	]+bgez[ 	]+\$a0,[ 	]+-8[ 	]+#[ 	]+0[ 	]+<\.L1>
@@ -47,4 +47,4 @@ Disassembly of section .text:
 [ 	]+4c:[ 	]+R_LARCH_B16[ 	]+\.L1
 [ 	]+50:[ 	]+6fffb0a4[ 	]+bgeu[ 	]+\$a1,[ 	]+\$a0,[ 	]+-80[ 	]+#[ 	]+0[ 	]+<\.L1>
 [ 	]+50:[ 	]+R_LARCH_B16[ 	]+\.L1
-[ 	]+54:[ 	]+4c000020[ 	]+ret[ 	]+
+[ 	]+54:[ 	]+4c000020[ 	]+ret
diff --git a/gas/testsuite/gas/loongarch/nop.d b/gas/testsuite/gas/loongarch/nop.d
index 222456e8b8c..ca8c56309e9 100644
--- a/gas/testsuite/gas/loongarch/nop.d
+++ b/gas/testsuite/gas/loongarch/nop.d
@@ -7,4 +7,4 @@
 Disassembly of section .text:
 
 0+000 <target>:
-[ 	]+0:[ 	]+03400000[ 	]+nop[ 	]+
+[ 	]+0:[ 	]+03400000[ 	]+nop
diff --git a/gas/testsuite/gas/loongarch/privilege_op.d b/gas/testsuite/gas/loongarch/privilege_op.d
index 73925f21a37..e9ca60b2b32 100644
--- a/gas/testsuite/gas/loongarch/privilege_op.d
+++ b/gas/testsuite/gas/loongarch/privilege_op.d
@@ -31,13 +31,13 @@ Disassembly of section .text:
 [ 	]+54:[ 	]+064814a4 [ 	]+iocsrwr.h[ 	]+[ 	]+\$a0, \$a1
 [ 	]+58:[ 	]+064818a4 [ 	]+iocsrwr.w[ 	]+[ 	]+\$a0, \$a1
 [ 	]+5c:[ 	]+06481ca4 [ 	]+iocsrwr.d[ 	]+[ 	]+\$a0, \$a1
-[ 	]+60:[ 	]+06482000 [ 	]+tlbclr[ 	]+
-[ 	]+64:[ 	]+06482400 [ 	]+tlbflush[ 	]+
-[ 	]+68:[ 	]+06482800 [ 	]+tlbsrch[ 	]+
-[ 	]+6c:[ 	]+06482c00 [ 	]+tlbrd[ 	]+
-[ 	]+70:[ 	]+06483000 [ 	]+tlbwr[ 	]+
-[ 	]+74:[ 	]+06483400 [ 	]+tlbfill[ 	]+
-[ 	]+78:[ 	]+06483800 [ 	]+ertn[ 	]+
+[ 	]+60:[ 	]+06482000 [ 	]+tlbclr
+[ 	]+64:[ 	]+06482400 [ 	]+tlbflush
+[ 	]+68:[ 	]+06482800 [ 	]+tlbsrch
+[ 	]+6c:[ 	]+06482c00 [ 	]+tlbrd
+[ 	]+70:[ 	]+06483000 [ 	]+tlbwr
+[ 	]+74:[ 	]+06483400 [ 	]+tlbfill
+[ 	]+78:[ 	]+06483800 [ 	]+ertn
 [ 	]+7c:[ 	]+06488000 [ 	]+idle[ 	]+[ 	]+0x0
 [ 	]+80:[ 	]+0648ffff [ 	]+idle[ 	]+[ 	]+0x7fff
 [ 	]+84:[ 	]+064998a0 [ 	]+invtlb[ 	]+[ 	]+0x0, \$a1, \$a2
diff --git a/gas/testsuite/gas/loongarch/reloc.d b/gas/testsuite/gas/loongarch/reloc.d
index 0458830f30b..fa249c58fd5 100644
--- a/gas/testsuite/gas/loongarch/reloc.d
+++ b/gas/testsuite/gas/loongarch/reloc.d
@@ -8,7 +8,7 @@
 Disassembly of section .text:
 
 00000000.* <.text>:
-[ 	]+0:[ 	]+03400000[ 	]+nop[ 	]+
+[ 	]+0:[ 	]+03400000[ 	]+nop
 [ 	]+4:[ 	]+58000085[ 	]+beq[ 	]+\$a0,[ 	]+\$a1,[ 	]+0[ 	]+#[ 	]+0x4
 [ 	]+4:[ 	]+R_LARCH_B16[ 	]+.L1
 [ 	]+8:[ 	]+5c000085[ 	]+bne[ 	]+\$a0,[ 	]+\$a1,[ 	]+0[ 	]+#[ 	]+0x8
diff --git a/opcodes/loongarch-dis.c b/opcodes/loongarch-dis.c
index 66a55960716..c0f0642c8fc 100644
--- a/opcodes/loongarch-dis.c
+++ b/opcodes/loongarch-dis.c
@@ -267,7 +267,12 @@ disassemble_one (insn_t insn, struct disassemble_info *info)
     }
 
   info->insn_type = dis_nonbranch;
-  info->fprintf_styled_func (info->stream, dis_style_mnemonic, "%-12s", opc->name);
+  if (opc->format == NULL || opc->format[0] == '\0')
+    info->fprintf_styled_func (info->stream, dis_style_mnemonic,
+				"%s", opc->name);
+  else
+    info->fprintf_styled_func (info->stream, dis_style_mnemonic,
+				"%-12s", opc->name);
 
   {
     char *fake_args = xmalloc (strlen (opc->format) + 1);