Merge pull request #5691 from martin-frbg/neov2_dotbug

martin-frbg · web-flow · commit afcf70dad9c4 · 2026-03-20T16:20:43.000+01:00
Avoid potential miscompilation of the ARM64 (NeoverseV2) dot kernel
diff --git a/kernel/arm64/dot_kernel_asimd.c b/kernel/arm64/dot_kernel_asimd.c
@@ -262,7 +262,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 static RETURN_TYPE dot_kernel_asimd(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
 {
-	RETURN_TYPE  dot = 0.0;
+	volatile RETURN_TYPE  dot = 0.0;
 	BLASLONG j = 0;
 
 	__asm__ __volatile__ (

Original file line number	Diff line number	Diff line change
`@@ -262,7 +262,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.`
`262`	`262`
`263`	`263`	`static RETURN_TYPE dot_kernel_asimd(BLASLONG n, FLOAT x, BLASLONG inc_x, FLOAT y, BLASLONG inc_y)`
`264`	`264`	`{`
`265`		`- RETURN_TYPE dot = 0.0;`
	`265`	`+ volatile RETURN_TYPE dot = 0.0;`
`266`	`266`	`BLASLONG j = 0;`
`267`	`267`
`268`	`268`	`__asm__ __volatile__ (`