[llvm] [AMDGPU][MC] Support src modifiers for v_mov_b32 and v_movrel* instructions (PR #76498)

[Joe Nash via llvm-commits]

================
@@ -2358,24 +2358,51 @@
 # GFX12: v_movreld_b32_e64 v255, 0xaf123456      ; encoding: [0xff,0x00,0xc2,0xd5,0xff,0x00,0x00,0x00,0x56,0x34,0x12,0xaf]
 0xff,0x00,0xc2,0xd5,0xff,0x00,0x00,0x00,0x56,0x34,0x12,0xaf
 
+# GFX12: v_movreld_b32_e64 v5, -v1               ; encoding: [0x05,0x00,0xc2,0xd5,0x01,0x01,0x00,0x20]
+0x05,0x00,0xc2,0xd5,0x01,0x01,0x00,0x20
+
+# GFX12: v_movreld_b32_e64 v5, |v2|              ; encoding: [0x05,0x01,0xc2,0xd5,0x02,0x01,0x00,0x00]
+0x05,0x01,0xc2,0xd5,0x02,0x01,0x00,0x00
+
+# GFX12: v_movreld_b32_e64 v5, -s1               ; encoding: [0x05,0x00,0xc2,0xd5,0x01,0x00,0x00,0x20]
+0x05,0x00,0xc2,0xd5,0x01,0x00,0x00,0x20
+
 # GFX12: v_movrels_b32_e64 v5, v1                ; encoding: [0x05,0x00,0xc3,0xd5,0x01,0x01,0x00,0x00]
 0x05,0x00,0xc3,0xd5,0x01,0x01,0x00,0x00
 
 # GFX12: v_movrels_b32_e64 v255, v255            ; encoding: [0xff,0x00,0xc3,0xd5,0xff,0x01,0x00,0x00]
 0xff,0x00,0xc3,0xd5,0xff,0x01,0x00,0x00
 
+# GFX12: v_movrels_b32_e64 v5, -v1               ; encoding: [0x05,0x00,0xc3,0xd5,0x01,0x01,0x00,0x20]
+0x05,0x00,0xc3,0xd5,0x01,0x01,0x00,0x20
+
+# GFX12: v_movrels_b32_e64 v5, |v2|              ; encoding: [0x05,0x01,0xc3,0xd5,0x02,0x01,0x00,0x00]
+0x05,0x01,0xc3,0xd5,0x02,0x01,0x00,0x00
+
 # GFX12: v_movrelsd_2_b32_e64 v5, v1             ; encoding: [0x05,0x00,0xc8,0xd5,0x01,0x01,0x00,0x00]
 0x05,0x00,0xc8,0xd5,0x01,0x01,0x00,0x00
 
 # GFX12: v_movrelsd_2_b32_e64 v255, v255         ; encoding: [0xff,0x00,0xc8,0xd5,0xff,0x01,0x00,0x00]
 0xff,0x00,0xc8,0xd5,0xff,0x01,0x00,0x00
 
+# GFX12: v_movrelsd_2_b32_e64_dpp v5, -v1 dpp8:[7,6,5,4,3,2,1,0]
+[0x05,0x00,0xc8,0xd5,0xe9,0x00,0x00,0x20,0x01,0x77,0x39,0x05]
+
+# GFX12: _movrelsd_2_b32_e64_dpp v5, |v1| dpp8:[7,6,5,4,3,2,1,0]
----------------
Sisyph wrote:

typo in the check line, 'v' is missing. And these dpp8 tests should go in the file llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_vop3_from_vop1_dpp8.txt

https://github.com/llvm/llvm-project/pull/76498