https://sourceware.org/bugzilla/show_bug.cgi?id=28381
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-gram-1 tmp]$ cat x.s
.text
.byte 0x62,0xc1,0xff,0x3f,0x2a,0x20
[hjl@gnu-gram-1 tmp]$ gcc -c x.s
[hjl@gnu-gram-1 tmp]$ objdump -dw x.o
x.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <.text>:
0: 62 c1 ff 3f 2a 20 vcvtsi2sdq (%r8){1to4},%xmm0,%xmm20{%k7}
[hjl@gnu-gram-1 tmp]$ cat y.s
vcvtsi2sdq (%r8){1to4},%xmm0,%xmm20{%k7}
[hjl@gnu-gram-1 tmp]$ gcc -c y.s
y.s: Assembler messages:
y.s:1: Error: unsupported broadcast for `vcvtsi2sd'
[hjl@gnu-gram-1 tmp]$
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