From 7f0ebb21eda7349b3844115f51631ecafd9210f6 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Thu, 15 Jul 2021 09:47:13 +0200
Subject: [PATCH] Update gemv.c

---
 interface/gemv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/interface/gemv.c b/interface/gemv.c
index 8d8a798de..cbd9f2d5b 100644
--- a/interface/gemv.c
+++ b/interface/gemv.c
@@ -201,7 +201,9 @@ void CNAME(enum CBLAS_ORDER order,
   if (beta != ONE) SCAL_K(leny, 0, 0, beta, y, blasabs(incy), NULL, 0, NULL, 0);
 
   if (alpha == ZERO) return;
-#if 1
+
+#if 0
+/* this optimization causes stack corruption on x86_64 under OSX, Windows and FreeBSD */
   if (trans == 0 && incx == 1 && incy == 1 && m*n < 2304 *GEMM_MULTITHREAD_THRESHOLD) {
     GEMV_N(m, n, 0, alpha, a, lda, x, incx, y, incy, NULL);
     return;