https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70028
Bug ID: 70028
Summary: Error: operand size mismatch for `kmovw' (wrong
assembly generated) with -mavx512bw -masm=intel
Product: gcc
Version: 6.0
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: ---
Target: x86_64-pc-linux-gnu
Created attachment 37832
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37832&action=edit
reduced testcase
Compiler output:
$ gcc -O2 -fno-forward-propagate -mavx512bw -masm=intel testcase.c
/tmp/ccxxiwnV.s: Assembler messages:
/tmp/ccxxiwnV.s:78: Error: operand size mismatch for `kmovw'
@@ -75,7 +75,7 @@
mov rdx, QWORD PTR [rsp+16]
mov rcx, QWORD PTR [rsp+24]
call __modti3
- kmovw k0, DWORD PTR [rsp+62]
+ kmovw k0, WORD PTR [rsp+62]
kmovw edi, k0
add rax, r13
adc rdx, r14
fixes the assembly (results in the same binary image as with -masm=att)
