diff mbox series

x86emul: work around gcc11 bug in SIMD tests

Message ID 83d3077d-76ad-b35f-4be0-5e968fbcae19@suse.com (mailing list archive)
State New, archived
Headers show
Series x86emul: work around gcc11 bug in SIMD tests | expand

Commit Message

Jan Beulich Feb. 11, 2022, 11:01 a.m. UTC 
Gcc11 looks to have trouble with conditional expressions used with
vector operands: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104497.
Replace two instances causing SEGV there in certain cases.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

Comments

Andrew Cooper Feb. 11, 2022, 11:37 a.m. UTC | #1 
On 11/02/2022 11:01, Jan Beulich wrote:
> Gcc11 looks to have trouble with conditional expressions used with
> vector operands: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104497.
> Replace two instances causing SEGV there in certain cases.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>

Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
diff mbox series

Patch

--- a/tools/tests/x86_emulator/simd.c
+++ b/tools/tests/x86_emulator/simd.c
@@ -1727,8 +1727,8 @@  int simd_test(void)
     if ( !eq(x - src, (alt + 1) / 2) ) return __LINE__;
 #endif
 
-    for ( i = 0; i < ELEM_COUNT; ++i )
-        y[i] = (i & 1 ? inv : src)[i];
+    for ( y = src, i = 1; i < ELEM_COUNT; i += 2 )
+        y[i] = inv[i];
 
 #ifdef select
 # ifdef UINT_SIZE
--- a/tools/tests/x86_emulator/simd-sg.c
+++ b/tools/tests/x86_emulator/simd-sg.c
@@ -282,7 +282,7 @@  int sg_test(void)
 # if ELEM_SIZE == IDX_SIZE
     y = gather(x, array, idx, (idx & inv) != 0, ELEM_SIZE);
     for ( i = 0; i < ITEM_COUNT; ++i )
-        if ( y[i] != ((i + 1) & (ITEM_COUNT - i) ? idx : inv)[i] + 1 )
+        if ( y[i] != ((i + 1) & (ITEM_COUNT - i) ? idx[i] : inv[i]) + 1 )
             return __LINE__;
     for ( ; i < ELEM_COUNT; ++i )
         if ( y[i] )