diff --git a/BLAS/SRC/cgbmv.f b/BLAS/SRC/cgbmv.f
index 4f2414d8f1..aebd647a8f 100644
--- a/BLAS/SRC/cgbmv.f
+++ b/BLAS/SRC/cgbmv.f
@@ -148,7 +148,8 @@
 *>           ( 1 + ( n - 1 )*abs( INCY ) ) otherwise.
 *>           Before entry, the incremented array Y must contain the
 *>           vector y. On exit, Y is overwritten by the updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/cgemv.f b/BLAS/SRC/cgemv.f
index 451502f0b5..7ce6a4b7f0 100644
--- a/BLAS/SRC/cgemv.f
+++ b/BLAS/SRC/cgemv.f
@@ -119,7 +119,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/dgbmv.f b/BLAS/SRC/dgbmv.f
index 969afea1f3..e5e03221f7 100644
--- a/BLAS/SRC/dgbmv.f
+++ b/BLAS/SRC/dgbmv.f
@@ -146,7 +146,8 @@
 *>           ( 1 + ( n - 1 )*abs( INCY ) ) otherwise.
 *>           Before entry, the incremented array Y must contain the
 *>           vector y. On exit, Y is overwritten by the updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/dgemv.f b/BLAS/SRC/dgemv.f
index ef327dd6c5..5b23ac6f2b 100644
--- a/BLAS/SRC/dgemv.f
+++ b/BLAS/SRC/dgemv.f
@@ -117,7 +117,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/sgbmv.f b/BLAS/SRC/sgbmv.f
index 3550792c63..52108297ca 100644
--- a/BLAS/SRC/sgbmv.f
+++ b/BLAS/SRC/sgbmv.f
@@ -146,7 +146,8 @@
 *>           ( 1 + ( n - 1 )*abs( INCY ) ) otherwise.
 *>           Before entry, the incremented array Y must contain the
 *>           vector y. On exit, Y is overwritten by the updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/sgemv.f b/BLAS/SRC/sgemv.f
index 31dc1044bf..0a9b7398b8 100644
--- a/BLAS/SRC/sgemv.f
+++ b/BLAS/SRC/sgemv.f
@@ -117,7 +117,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/zgbmv.f b/BLAS/SRC/zgbmv.f
index 38c31fd350..0ae924b1c7 100644
--- a/BLAS/SRC/zgbmv.f
+++ b/BLAS/SRC/zgbmv.f
@@ -148,7 +148,8 @@
 *>           ( 1 + ( n - 1 )*abs( INCY ) ) otherwise.
 *>           Before entry, the incremented array Y must contain the
 *>           vector y. On exit, Y is overwritten by the updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/BLAS/SRC/zgemv.f b/BLAS/SRC/zgemv.f
index e735690c33..f75e2d8dd5 100644
--- a/BLAS/SRC/zgemv.f
+++ b/BLAS/SRC/zgemv.f
@@ -119,7 +119,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
-*>           If either m or n is zero, then Y not referenced.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/cla_gbamv.f b/SRC/cla_gbamv.f
index e98334fa48..cfa1697958 100644
--- a/SRC/cla_gbamv.f
+++ b/SRC/cla_gbamv.f
@@ -158,6 +158,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/cla_geamv.f b/SRC/cla_geamv.f
index 22ba240aac..a6333281c0 100644
--- a/SRC/cla_geamv.f
+++ b/SRC/cla_geamv.f
@@ -147,6 +147,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/dla_gbamv.f b/SRC/dla_gbamv.f
index a998c0cf11..09ebd096d6 100644
--- a/SRC/dla_gbamv.f
+++ b/SRC/dla_gbamv.f
@@ -157,6 +157,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/dla_geamv.f b/SRC/dla_geamv.f
index 8e962b459f..28931b846e 100644
--- a/SRC/dla_geamv.f
+++ b/SRC/dla_geamv.f
@@ -146,6 +146,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/sla_gbamv.f b/SRC/sla_gbamv.f
index c584466121..640c2b966a 100644
--- a/SRC/sla_gbamv.f
+++ b/SRC/sla_gbamv.f
@@ -157,6 +157,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/sla_geamv.f b/SRC/sla_geamv.f
index 0fcb80241d..3e69ce0c2b 100644
--- a/SRC/sla_geamv.f
+++ b/SRC/sla_geamv.f
@@ -146,6 +146,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/zla_gbamv.f b/SRC/zla_gbamv.f
index a4a9bc0a08..723e153670 100644
--- a/SRC/zla_gbamv.f
+++ b/SRC/zla_gbamv.f
@@ -158,6 +158,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY
diff --git a/SRC/zla_geamv.f b/SRC/zla_geamv.f
index bcdc5f1283..0655576637 100644
--- a/SRC/zla_geamv.f
+++ b/SRC/zla_geamv.f
@@ -147,6 +147,8 @@
 *>           Before entry with BETA non-zero, the incremented array Y
 *>           must contain the vector y. On exit, Y is overwritten by the
 *>           updated vector y.
+*>           If either m or n is zero, then Y not referenced and the function
+*>           performs a quick return.
 *> \endverbatim
 *>
 *> \param[in] INCY