https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124335
Bug ID: 124335
Summary: invalid "vmovsh" operand with
__builtin_ia32_loadsh_mask() and -masm=intel
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: assemble-failure
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 63805
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63805&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc -mavx512fp16 testcase.c -masm=intel
/tmp/ccPX2fJo.s: Assembler messages:
/tmp/ccPX2fJo.s:18: Error: unknown vector operation: `{3}'
-masm=intel generates:
vmovsh xmm0{3}, WORD PTR [rax]
where -masm=att generates:
vmovsh (%rax), %xmm0{%k1}
the k1 operand does not seem to be correctly substituted for %3%
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20260302082051-r16-7838-gb5cf8670028936-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/16.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20260302082051-r16-7838-gb5cf8670028936-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.1 20260227 (experimental) (GCC)
