"movbe" is not recognized as an x86 mnemonic

[llvmbot]

Bugzilla Link	10832
Resolution	FIXED
Resolved on	Nov 07, 2018 00:17
Version	trunk
OS	All
Depends On	#11074
Blocks	llvm/llvm-bugzilla-archive#10988
Reporter	LLVM Bugzilla Contributor
CC	@topperc

Extended Description

According to the "Intel® 64 and IA-32 Architectures Software Developer’s Manual
Volume 2 (2A & 2B): Instruction Set Reference, A-Z", p. 3-662:

0F 38 F0 /r MOVBE r32, m32

$ clang -mavx avx.s -c
/var/folders/J5/J5ahEYzWEFC1BPEW37amTE+++TM/-Tmp-/cc-1qUg1a.s:5:1: error: invalid instruction mnemonic 'movbe'
movbe (%ecx), %eax

[llvmbot]

assigned to @topperc

[topperc]

I'll try to take this. Requires some disassembler work related to CRC32 handling in the disassembler tables.

[topperc]

Fixed in r141007.

[llvmbot]

This looks good with r143033:

$ echo '0x0f 0x38 0xf0 0x00'| ./llvm-mc -disassemble -triple="x86_64"
movbel (%rax), %eax

$ echo '0x0f 0x38 0xf0 0x00'| ./llvm-mc -disassemble -triple="x86_64" -x86-asm-syntax=intel
movbe EAX, DWORD PTR [RAX]

And clang compiles:
movbe (%ecx), %eax

to:
0F 38 F0 01

[bcardosolopes]

mentioned in issue llvm/llvm-bugzilla-archive#10988