diff --git a/llvm/test/MC/Disassembler/AMDGPU/gfx11_dasm_vop1.txt b/llvm/test/MC/Disassembler/AMDGPU/gfx11_dasm_vop1.txt
--- a/llvm/test/MC/Disassembler/AMDGPU/gfx11_dasm_vop1.txt
+++ b/llvm/test/MC/Disassembler/AMDGPU/gfx11_dasm_vop1.txt
@@ -2650,6 +2650,24 @@
 # GFX11: v_rcp_iflag_f32_e32 v255, 0xaf123456    ; encoding: [0xff,0x56,0xfe,0x7f,0x56,0x34,0x12,0xaf]
 0xff,0x56,0xfe,0x7f,0x56,0x34,0x12,0xaf
 
+# GFX11: v_readfirstlane_b32 s5, v1              ; encoding: [0x01,0x05,0x0a,0x7e]
+0x01,0x05,0x0a,0x7e
+
+# GFX11: v_readfirstlane_b32 s105, v1            ; encoding: [0x01,0x05,0xd2,0x7e]
+0x01,0x05,0xd2,0x7e
+
+# GFX11: v_readfirstlane_b32 vcc_lo, v1          ; encoding: [0x01,0x05,0xd4,0x7e]
+0x01,0x05,0xd4,0x7e
+
+# GFX11: v_readfirstlane_b32 vcc_hi, v1          ; encoding: [0x01,0x05,0xd6,0x7e]
+0x01,0x05,0xd6,0x7e
+
+# GFX11: v_readfirstlane_b32 ttmp15, v1          ; encoding: [0x01,0x05,0xf6,0x7e]
+0x01,0x05,0xf6,0x7e
+
+# GFX11: v_readfirstlane_b32 null, v255          ; encoding: [0xff,0x05,0xf8,0x7e]
+0xff,0x05,0xf8,0x7e
+
 # GFX11: v_rndne_f16_e32 v5, v1                  ; encoding: [0x01,0xbd,0x0a,0x7e]
 0x01,0xbd,0x0a,0x7e