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[Bug gas/25438] x86 MOVZ* anomalies for unusual/wrong operand combinatio


From: hjl.tools at gmail dot com
Subject: [Bug gas/25438] x86 MOVZ* anomalies for unusual/wrong operand combinations
Date: Wed, 22 Jan 2020 23:29:48 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=25438

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Also

[hjl@gnu-cfl-1 pr25438]$ cat y.s
movzwl  %ax, %rcx
[hjl@gnu-cfl-1 pr25438]$ gcc -c y.s
[hjl@gnu-cfl-1 pr25438]$ objdump -dw y.o

y.o:     file format elf64-x86-64


Disassembly of section .text:

0000000000000000 <.text>:
   0:   48 0f b7 c8             movzwq %ax,%rcx
[hjl@gnu-cfl-1 pr25438]$

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