[LLVM][AMDGPU] MC support for ds_bpermute_fi_b32 (#124108)

Added assembler/disassembler support for ds_bpermute_fi_b32 instruction,
as well as tests.

Author: Acim-Maravic

llvm/lib/Target/AMDGPU/DSInstructions.td

@@ -699,6 +699,7 @@ def DS_PERMUTE_B32  : DS_1A1D_PERMUTE <"ds_permute_b32",
                                        int_amdgcn_ds_permute>;
 def DS_BPERMUTE_B32 : DS_1A1D_PERMUTE <"ds_bpermute_b32",
                                        int_amdgcn_ds_bpermute>;
+def DS_BPERMUTE_FI_B32 : DS_1A1D_PERMUTE <"ds_bpermute_fi_b32">;
 }
 
 } // let SubtargetPredicate = isGFX8Plus
@@ -1264,6 +1265,7 @@ defm DS_PK_ADD_F16        : DS_Real_gfx12<0x09a>;
 defm DS_PK_ADD_RTN_F16    : DS_Real_gfx12<0x0aa>;
 defm DS_PK_ADD_BF16       : DS_Real_gfx12<0x09b>;
 defm DS_PK_ADD_RTN_BF16   : DS_Real_gfx12<0x0ab>;
+defm DS_BPERMUTE_FI_B32   : DS_Real_gfx12<0x0cd>;
 
 // New aliases added in GFX12 without renaming the instructions.
 let AssemblerPredicate = isGFX12Plus in {

llvm/test/MC/AMDGPU/gfx12_asm_ds.s

@@ -1910,3 +1910,15 @@ ds_swizzle_b32 v8, v2 offset:swizzle(BROADCAST,8,7)
 
 ds_swizzle_b32 v8, v2 offset:swizzle(BITMASK_PERM, "01pip")
 // GFX12: [0x07,0x09,0xd4,0xd8,0x02,0x00,0x00,0x08]
+
+ds_bpermute_fi_b32 v5, v1, v2
+// GFX12: encoding: [0x00,0x00,0x34,0xdb,0x01,0x02,0x00,0x05]
+
+ds_bpermute_fi_b32 v5, v1, v2 offset:65535
+// GFX12: encoding: [0xff,0xff,0x34,0xdb,0x01,0x02,0x00,0x05]
+
+ds_bpermute_fi_b32 v5, v1, v2 offset:0
+// GFX12: encoding: [0x00,0x00,0x34,0xdb,0x01,0x02,0x00,0x05]
+
+ds_bpermute_fi_b32 v255, v255, v255 offset:4
+// GFX12: encoding: [0x04,0x00,0x34,0xdb,0xff,0xff,0x00,0xff]

llvm/test/MC/Disassembler/AMDGPU/gfx12_dasm_ds.txt

@@ -3233,3 +3233,12 @@
 
 # GFX12: ds_xor_rtn_b64 v[5:6], v255, v[2:3] offset:65535 ; encoding: [0xff,0xff,0xac,0xd9,0xff,0x02,0x00,0x05]
 0xff,0xff,0xac,0xd9,0xff,0x02,0x00,0x05
+
+# GFX12: ds_bpermute_fi_b32 v5, v1, v2           ; encoding: [0x00,0x00,0x34,0xdb,0x01,0x02,0x00,0x05]
+0x00,0x00,0x34,0xdb,0x01,0x02,0x00,0x05
+
+# GFX12: ds_bpermute_fi_b32 v5, v1, v2 offset:65535 ; encoding: [0xff,0xff,0x34,0xdb,0x01,0x02,0x00,0x05]
+0xff,0xff,0x34,0xdb,0x01,0x02,0x00,0x05
+
+# GFX12: ds_bpermute_fi_b32 v255, v255, v255 offset:4 ; encoding: [0x04,0x00,0x34,0xdb,0xff,0xff,0x00,0xff]
+0x04,0x00,0x34,0xdb,0xff,0xff,0x00,0xff