[LLVM][AArch64][tblgen]: Make operand suffix case-insinsitive

[hassnaaHamdi]

EX: fdot v26.8H, v22.16B, v9.2B[0] should be equivalent to fdot v26.8h, v22.16b, v9.2b[0]

[llvmbot]

@llvm/pr-subscribers-backend-aarch64

@llvm/pr-subscribers-mc

Author: Hassnaa Hamdi (hassnaaHamdi)

Changes

EX: fdot v26.8H, v22.16B, v9.2B[0] should be equivalent to fdot v26.8h, v22.16b, v9.2b[0]

---

Full diff: https://github.com/llvm/llvm-project/pull/76808.diff

2 Files Affected:

• (modified) llvm/lib/Target/AArch64/AArch64InstrFormats.td (+1)
• (modified) llvm/test/MC/AArch64/FP8/dot.s (+6)

diff --git a/llvm/lib/Target/AArch64/AArch64InstrFormats.td b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
index cb63d8726744d4..10ad5b1f8f2580 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrFormats.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
@@ -12586,6 +12586,7 @@ def : TokenAlias<".4S", ".4s">;
 def : TokenAlias<".2D", ".2d">;
 def : TokenAlias<".1Q", ".1q">;
 def : TokenAlias<".2H", ".2h">;
+def : TokenAlias<".2B", ".2b">;
 def : TokenAlias<".B", ".b">;
 def : TokenAlias<".H", ".h">;
 def : TokenAlias<".S", ".s">;
diff --git a/llvm/test/MC/AArch64/FP8/dot.s b/llvm/test/MC/AArch64/FP8/dot.s
index e755430745c34e..cfcc1137231a95 100644
--- a/llvm/test/MC/AArch64/FP8/dot.s
+++ b/llvm/test/MC/AArch64/FP8/dot.s
@@ -44,6 +44,12 @@ fdot  v31.4h, v31.8b, v15.2b[0]
 // CHECK-ERROR: instruction requires: fp8dot2
 // CHECK-UNKNOWN: 0f4f03ff <unknown>
 
+fdot v26.8H, v22.16B, v9.2B[0]
+// CHECK-INST: fdot  v26.8h, v22.16b, v9.2b[0]
+// CHECK-ENCODING: [0xda,0x02,0x49,0x4f]
+// CHECK-ERROR: instruction requires: fp8dot2
+// CHECK-UNKNOWN: 4f4902da <unknown>
+
 fdot  v0.8h, v0.16b, v15.2b[7]
 // CHECK-INST: fdot  v0.8h, v0.16b, v15.2b[7]
 // CHECK-ENCODING: [0x00,0x08,0x7f,0x4f]

[pratlucas]

LGTM. Thanks for the fix!