[AMDGPU][True16][MC] duplicate vop1 tests to fake16 and update real-true16 flags for GFX12 (#100849)

duplicate vop1 tests to fake16 and update real-true16 flags for GFX12

creating duplications here to avoid bulk copy in the following true16
patches

---------

Co-authored-by: guochen2 <guochen2@amd.com>

Author: broxigarchen

llvm/test/MC/AMDGPU/gfx12_asm_vop1-fake16.s

@@ -1,7 +1,9 @@
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+
+// this file will be converted to true16 format when more true16 instructions are supported
 
 v_bfrev_b32_e32 v5, v1
 // GFX12: v_bfrev_b32_e32 v5, v1                  ; encoding: [0x01,0x71,0x0a,0x7e]