[llvm] [X86][MC] Support encoding/decoding for APX CCMP/CTEST (PR #83863)

[Phoebe Wang via llvm-commits]

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@@ -0,0 +1,1598 @@
+# RUN: llvm-mc -triple x86_64 -disassemble %s | FileCheck %s --check-prefix=ATT
+# RUN: llvm-mc -triple x86_64 -disassemble -output-asm-variant=1 %s | FileCheck %s --check-prefix=INTEL
+
+## Condition flags
+
+# ATT:   ccmpoq {dfv=}	%rax, %rbx
+# INTEL: ccmpo {dfv=}	rbx, rax
+0x62,0xf4,0x84,0x00,0x39,0xc3
+
+# ATT:   ccmpoq {dfv=of}	%rax, %rbx
+# INTEL: ccmpo {dfv=of}	rbx, rax
+0x62,0xf4,0xc4,0x00,0x39,0xc3
+
+# ATT:   ccmpoq {dfv=sf}	%rax, %rbx
+# INTEL: ccmpo {dfv=sf}	rbx, rax
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phoebewang wrote:

The indentation before `{` is not unified. Below uses tab but here looks like single space. It think it's better to always use single space

https://github.com/llvm/llvm-project/pull/83863