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]$ -- You are receiving this mail because: You are on the CC list for the bug.