diff --git a/.github/workflows/cross-compile.yaml b/.github/workflows/cross-compile.yaml
index a195c87b3..5de84105a 100644
--- a/.github/workflows/cross-compile.yaml
+++ b/.github/workflows/cross-compile.yaml
@@ -51,9 +51,11 @@ jobs:
             ccache-max: 64M
           - arch: s390x
             target-triple: s390x-linux-gnu
-            flags: --target=s390x-linux-gnu
-            cc: clang
-            cxx: clang++
+            # flags: --target=s390x-linux-gnu
+            # cc: clang
+            # cxx: clang++
+            cc: s390x-linux-gnu-gcc
+            cxx: s390x-linux-gnu-g++
             ccache-max: 64M
           - arch: riscv64
             target-triple: riscv64-linux-gnu
diff --git a/ChangeLog b/ChangeLog
index 6be39878f..775b2142c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,10 +1,9 @@
-June 1, 2025: version 7.11.0
+June 2, 2025: version 7.11.0
 
     * LAGraph v1.2: many new experimental algorithms, LAGraph_Random in src/
-    * GraphBLAS v10.1.0: risc-V vectorization, GRAPHBLAS_VANILLA (optional;
-        to disable GxB extensions), and cmake revisions to ensure gcc is not
-        used to compile GraphBLAS on the Power or s390 processors (as a
-        workaround around for a bug in the gcc compiler).
+    * GraphBLAS v10.1.1: risc-V vectorization, GRAPHBLAS_VANILLA (optional;
+        to disable GxB extensions), and workaround for gcc compiler bug on
+        Power and s390x processors.
     * nearly all packages: cmake updates, to move static targets into separate
         exports (needed for Fedora packaging)
     * Package versions in this release: (* denotes a new version)
@@ -18,7 +17,7 @@ June 1, 2025: version 7.11.0
         CSparse 4.3.2
         CXSparse 4.4.2              *
         Example 1.8.9               *
-        GraphBLAS 10.1.0            *
+        GraphBLAS 10.1.1            *
         KLU 2.3.6                   *
         LDL 3.3.3                   *
         LAGraph 1.2.0               *
diff --git a/Example/CMakeLists.txt b/Example/CMakeLists.txt
index c3ddc3342..7202e1b54 100644
--- a/Example/CMakeLists.txt
+++ b/Example/CMakeLists.txt
@@ -96,7 +96,7 @@ find_package ( CCOLAMD 3.3.5 REQUIRED )
 find_package ( CHOLMOD 5.3.4 REQUIRED )
 find_package ( COLAMD 3.3.5 REQUIRED )
 find_package ( CXSparse 4.4.2 REQUIRED )
-find_package ( GraphBLAS 10.1.0 )
+find_package ( GraphBLAS 10.1.1 )
 find_package ( KLU 2.3.6 REQUIRED )
 find_package ( KLU_CHOLMOD 2.3.6 REQUIRED )
 find_package ( LDL 3.3.3 REQUIRED )
diff --git a/Example/Demo/mydemo.out b/Example/Demo/mydemo.out
index 69861d395..48d48d4b3 100644
--- a/Example/Demo/mydemo.out
+++ b/Example/Demo/mydemo.out
@@ -1,25 +1,25 @@
 My demo
-Date from #include 'my.h':  May 5, 2025
-Date from compiled library: May 5, 2025
-version from #include 'my.h.': 1.8.8
-version from compiled library: 1.8.8
+Date from #include 'my.h':  June 1, 2025
+Date from compiled library: June 1, 2025
+version from #include 'my.h.': 1.8.9
+version from compiled library: 1.8.9
 
 ------------------------------------------------------------
-MY: v1.8.8 (May 5, 2025)
-MY: v1.8.8 (in library)
-MY version code: 1008008
-MY date: May 5, 2025
+MY: v1.8.9 (June 1, 2025)
+MY: v1.8.9 (in library)
+MY version code: 1008009
+MY date: June 1, 2025
 
 ------------------------------------------------------------
-SuiteSparse_config: v7.10.3 (May 5, 2025)
-SuiteSparse_config: v7.10.3 (in library)
-SuiteSparse_config version code: 7010003
+SuiteSparse_config: v7.11.0 (June 1, 2025)
+SuiteSparse_config: v7.11.0 (in library)
+SuiteSparse_config version code: 7011000
 
 ------------------------------------------------------------
-CXSparse: v4.4.1 (June 20, 2024)
-CXSparse: v4.4.1 (in library)
-CXSparse version code: 4004001
-CXSparse Version 4.4.1, June 20, 2024.  Copyright (c) Timothy A. Davis, 2006-2024
+CXSparse: v4.4.2 (June 1, 2025)
+CXSparse: v4.4.2 (in library)
+CXSparse version code: 4004002
+CXSparse Version 4.4.2, June 1, 2025.  Copyright (c) Timothy A. Davis, 2006-2024
 2-by-2, nzmax: 4 nnz: 4, 1-norm: 34
     col 0 : locations 0 to 1
       0 : 11
@@ -29,16 +29,16 @@ CXSparse Version 4.4.1, June 20, 2024.  Copyright (c) Timothy A. Davis, 2006-202
       1 : 22
 
 ------------------------------------------------------------
-AMD: v3.3.3 (June 20, 2024)
-AMD: v3.3.3 (in library)
-AMD version code: 3003003
+AMD: v3.3.4 (June 1, 2025)
+AMD: v3.3.4 (in library)
+AMD version code: 3003004
 P [0] = 0
 P [1] = 1
 
 ------------------------------------------------------------
-BTF: v2.3.2 (Mar 22, 2024)
-BTF: v2.3.2 (in library)
-BTF version code: 2003002
+BTF: v2.3.3 (June 1, 2025)
+BTF: v2.3.3 (in library)
+BTF version code: 2003003
 P [0] = 0
 P [1] = 1
 Q [0] = 0
@@ -46,61 +46,61 @@ Q [1] = 1
 nblocks 1
 
 ------------------------------------------------------------
-CAMD: v3.3.4 (May 5, 2025)
-CAMD: v3.3.4 (in library)
-CAMD version code: 3003004
+CAMD: v3.3.5 (June 1, 2025)
+CAMD: v3.3.5 (in library)
+CAMD version code: 3003005
 P [0] = 0
 P [1] = 1
 
 ------------------------------------------------------------
-CCOLAMD: v3.3.4 (June 20, 2024)
-CCOLAMD: v3.3.4 (in library)
-CCOLAMD version code: 3003004
+CCOLAMD: v3.3.5 (June 1, 2025)
+CCOLAMD: v3.3.5 (in library)
+CCOLAMD version code: 3003005
 P [0] = 0
 P [1] = 1
 
 ------------------------------------------------------------
-COLAMD: v3.3.4 (June 20, 2024)
-COLAMD: v3.3.4 (in library)
-COLAMD version code: 3003004
+COLAMD: v3.3.5 (June 1, 2025)
+COLAMD: v3.3.5 (in library)
+COLAMD version code: 3003005
 P [0] = 0
 P [1] = 1
 
 ------------------------------------------------------------
-CHOLMOD: v5.3.3 (May 5, 2025)
-CHOLMOD: v5.3.3 (in library)
-CHOLMOD version code: 5003003
+CHOLMOD: v5.3.4 (June 1, 2025)
+CHOLMOD: v5.3.4 (in library)
+CHOLMOD version code: 5003004
 
 ------------------------------------------------------------
-GraphBLAS: v10.0.5 (May 5, 2025)
-GraphBLAS: v10.0.5 (in library)
-GraphBLAS version code: 10000005
+GraphBLAS: v10.1.1 (June 2, 2025)
+GraphBLAS: v10.1.1 (in library)
+GraphBLAS version code: 10001001
 
 ------------------------------------------------------------
-LAGraph: v1.1.5 (Feb 20, 2025)
-LAGraph: v1.1.5 (in library)
-LAGraph version code: 1001005
+LAGraph: v1.2.0 (June 1, 2025)
+LAGraph: v1.2.0 (in library)
+LAGraph version code: 1002000
 
 ------------------------------------------------------------
-KLU: v2.3.5 (Oct 10, 2024)
-KLU: v2.3.5 (in library)
-KLU version code: 2003005
+KLU: v2.3.6 (June 1, 2025)
+KLU: v2.3.6 (in library)
+KLU version code: 2003006
 x [0] = 36.4
 x [1] = -32.7
 error: 7.10543e-14
 
 ------------------------------------------------------------
-LDL: v3.3.2 (Mar 22, 2024)
-LDL: v3.3.2 (in library)
-LDL version code: 3003002
+LDL: v3.3.3 (June 1, 2025)
+LDL: v3.3.3 (in library)
+LDL version code: 3003003
 x2 [0] = 36.4
 x2 [1] = -32.7
 error: 0
 
 ------------------------------------------------------------
-RBio: v4.3.4 (Oct 10, 2024)
-RBio: v4.3.4 (in library)
-RBio version code: 4003004
+RBio: v4.3.5 (June 1, 2025)
+RBio: v4.3.5 (in library)
+RBio version code: 4003005
 njumbled 0, nzeros 0
 result 0
 mtype: iua
@@ -113,14 +113,14 @@ iua                        2             2             4             0
  11 21 12 22
 
 ------------------------------------------------------------
-SPEX: v3.2.3 (Feb 20, 2025)
-SPEX: v3.2.3 (in library)
-SPEX version code: 3002003
+SPEX: v3.2.4 (June 1, 2025)
+SPEX: v3.2.4 (in library)
+SPEX version code: 3002004
 
 ------------------------------------------------------------
-SuiteSparseQR: v4.3.4 (June 20, 2024)
-SuiteSparseQR: v4.3.4 (in library)
-SuiteSparseQR version code: 4003004
+SuiteSparseQR: v4.3.5 (June 1, 2025)
+SuiteSparseQR: v4.3.5 (in library)
+SuiteSparseQR version code: 4003005
 
 CHOLMOD dense:   X from QR:  2-by-1, 
   leading dimension 2, nzmax 2, real, double
@@ -131,10 +131,10 @@ CHOLMOD dense:   X from QR:  2-by-1,
 
 
 ------------------------------------------------------------
-UMFPACK: v6.3.5 (Sept 23, 2024)
-UMFPACK: v6.3.5 (in library)
-UMFPACK version code: 6003005
-UMFPACK V6.3.5 (Sept 23, 2024)
+UMFPACK: v6.3.6 (June 1, 2025)
+UMFPACK: v6.3.6 (in library)
+UMFPACK version code: 6003006
+UMFPACK V6.3.6 (June 1, 2025)
 UMFPACK:  Copyright (c) 2005-2024 by Timothy A. Davis.  All Rights Reserved.
 
 UMFPACK License: SPDX-License-Identifier: GPL-2.0+
@@ -155,9 +155,9 @@ UMFPACK License: SPDX-License-Identifier: GPL-2.0+
 
 
 Availability: http://www.suitesparse.com
-UMFPACK V6.3.5 (Sept 23, 2024): OK
+UMFPACK V6.3.6 (June 1, 2025): OK
 
-UMFPACK V6.3.5 (Sept 23, 2024), Info:
+UMFPACK V6.3.6 (June 1, 2025), Info:
     matrix entry defined as:          double
     Int (generic integer) defined as: int64_t
     BLAS library used: Intel MKL 64lp BLAS (32-bit integers).  size of BLAS integer: 4
diff --git a/Example/Include/my_internal.h b/Example/Include/my_internal.h
index 3e7c7758c..47f63fe41 100644
--- a/Example/Include/my_internal.h
+++ b/Example/Include/my_internal.h
@@ -56,8 +56,8 @@
 #if ! defined (NO_GRAPHBLAS)
     #include "GraphBLAS.h"
     #if !defined ( GxB_SUITESPARSE_GRAPHBLAS ) || \
-        GxB_IMPLEMENTATION < GxB_VERSION (10,1,0)
-    #error "This library requires SuiteSparse:GraphBLAS 10.1.0 or later"
+        GxB_IMPLEMENTATION < GxB_VERSION (10,1,1)
+    #error "This library requires SuiteSparse:GraphBLAS 10.1.1 or later"
     #endif
 #endif
 
diff --git a/GraphBLAS/CUDA/GB_cuda_AxB_dot3.cpp b/GraphBLAS/CUDA/GB_cuda_AxB_dot3.cpp
index 9c6974c45..36c5580a3 100644
--- a/GraphBLAS/CUDA/GB_cuda_AxB_dot3.cpp
+++ b/GraphBLAS/CUDA/GB_cuda_AxB_dot3.cpp
@@ -98,8 +98,9 @@ GrB_Info GB_cuda_AxB_dot3           // C<M> = A'*B using dot product method
     int device = -1;
 
     // FIXME: control the GPU to use via the descriptor
-    CUDA_OK (cudaSetDevice ( 0 )) ;
-    CUDA_OK (cudaGetDevice (&device)) ;
+//  CUDA_OK (cudaSetDevice ( 0 )) ;
+    CUDA_OK (cudaGetDevice (&device)) ;     // FIXME
+    printf ("dot3 using cuda device %d\n", device) ;
     int number_of_sms = GB_Global_gpu_sm_get (0) ;
 
     //--------------------------------------------------------------------------
diff --git a/GraphBLAS/Doc/ChangeLog b/GraphBLAS/Doc/ChangeLog
index ee54b0817..f388d405e 100644
--- a/GraphBLAS/Doc/ChangeLog
+++ b/GraphBLAS/Doc/ChangeLog
@@ -1,3 +1,9 @@
+June 2, 2025: version 10.1.1
+
+    * gcc can now be used the Power or s390:  workaround added;
+        see Source/mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c.
+	This resolves the issue found in v10.1.0.
+
 June 1, 2025: version 10.1.0
 
     * add support for RISC-V vectorization: contributed by Rodion Suvorov
diff --git a/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf b/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf
index c110069df..e992c5040 100644
Binary files a/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf and b/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf differ
diff --git a/GraphBLAS/Doc/GraphBLAS_version.tex b/GraphBLAS/Doc/GraphBLAS_version.tex
index 460ccb9da..bd751c165 100644
--- a/GraphBLAS/Doc/GraphBLAS_version.tex
+++ b/GraphBLAS/Doc/GraphBLAS_version.tex
@@ -1,5 +1,5 @@
 % version of SuiteSparse:GraphBLAS
 \date{VERSION
-10.1.0,
-June 1, 2025}
+10.1.1,
+June 3, 2025}
 
diff --git a/GraphBLAS/Doc/UserGuide/GrB_installing.tex b/GraphBLAS/Doc/UserGuide/GrB_installing.tex
index b0577e1d7..1ac7b552b 100644
--- a/GraphBLAS/Doc/UserGuide/GrB_installing.tex
+++ b/GraphBLAS/Doc/UserGuide/GrB_installing.tex
@@ -199,18 +199,6 @@ \subsubsection{On the Intel-based Mac}
     \begin{verbatim}
     make CC=icc CXX=icpc \end{verbatim} }
 
-%----------------------------------------
-\subsubsection{On IBM Power or IBM System/390}
-%----------------------------------------
-
-You cannot use use \verb'gcc' to compile GraphBLAS on the Power or s390
-architectures.  At least gcc versions up to 14.2.0 have a bug in the atomic
-capture on the IBM Power8 (see the comments in the \verb'Source/mxm/factory'
-folder).  The bug also occurs on the s390 architecture.  The cmake build script
-will report a fatal error if gcc is attempted to be used on these systems.  Use
-\verb'clang', \verb'ibm-clang', or \verb'xlc' instead.  Those compilers are
-able to correctly compile GraphBLAS on those systems.
-
 %----------------------------------------
 \subsubsection{On Microsoft Windows}
 \label{sec:windows}
diff --git a/GraphBLAS/Doc/UserGuide/GrB_release.tex b/GraphBLAS/Doc/UserGuide/GrB_release.tex
index 8215577ff..4b64ee441 100644
--- a/GraphBLAS/Doc/UserGuide/GrB_release.tex
+++ b/GraphBLAS/Doc/UserGuide/GrB_release.tex
@@ -5,6 +5,14 @@ \section{Release Notes}
 
 \begin{itemize}
 
+\item June 2, 2025: version 10.1.1
+
+    \begin{itemize}
+    \item gcc can now be used the Power or s390:  workaround added;
+        see \verb'Source/mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c.'
+	This resolves the issue found in v10.1.0.
+    \end{itemize}
+
 \item June 1, 2025: version 10.1.0
 
     \begin{itemize}
diff --git a/GraphBLAS/Include/GraphBLAS.h b/GraphBLAS/Include/GraphBLAS.h
index 2a53f1053..884de1a36 100644
--- a/GraphBLAS/Include/GraphBLAS.h
+++ b/GraphBLAS/Include/GraphBLAS.h
@@ -1,4 +1,4 @@
-// SuiteSparse:GraphBLAS 10.1.0
+// SuiteSparse:GraphBLAS 10.1.1
 //------------------------------------------------------------------------------
 // GraphBLAS.h: definitions for the GraphBLAS package
 //------------------------------------------------------------------------------
@@ -286,10 +286,10 @@
 
 // The version of this implementation, and the GraphBLAS API version:
 #define GxB_IMPLEMENTATION_NAME "SuiteSparse:GraphBLAS"
-#define GxB_IMPLEMENTATION_DATE "June 1, 2025"
+#define GxB_IMPLEMENTATION_DATE "June 3, 2025"
 #define GxB_IMPLEMENTATION_MAJOR 10
 #define GxB_IMPLEMENTATION_MINOR 1
-#define GxB_IMPLEMENTATION_SUB   0
+#define GxB_IMPLEMENTATION_SUB   1
 #define GxB_SPEC_DATE "Dec 22, 2023"
 #define GxB_SPEC_MAJOR 2
 #define GxB_SPEC_MINOR 1
diff --git a/GraphBLAS/README.md b/GraphBLAS/README.md
index f505dbe1f..ede832245 100644
--- a/GraphBLAS/README.md
+++ b/GraphBLAS/README.md
@@ -4,7 +4,7 @@ SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
 
 SPDX-License-Identifier: Apache-2.0
 
-VERSION 10.1.0, June 1, 2025
+VERSION 10.1.1, June 3, 2025
 
 SuiteSparse:GraphBLAS is a complete implementation of the GraphBLAS standard,
 which defines a set of sparse matrix operations on an extended algebra of
diff --git a/GraphBLAS/Source/include/GB_compiler.h b/GraphBLAS/Source/include/GB_compiler.h
index e3cdfbff7..fdf020e8c 100644
--- a/GraphBLAS/Source/include/GB_compiler.h
+++ b/GraphBLAS/Source/include/GB_compiler.h
@@ -255,6 +255,31 @@
 
 #endif
 
+#if !defined ( GBPPC )
+
+    // detect any Power architecture
+    #if defined (__powerpc) || defined (__powerpc__) || \
+        defined (__powerpc64__) || defined (__POWERPC__) || \
+        defined (__ppc__) || defined (__PPC__) || defined (_ARCH_PPC) || \
+        defined (__PPC64__) || defined (__ppc64__) || defined (_ARCH_PPC64)
+        #define GBPPC 1
+        #else
+        #define GBPPC 0
+    #endif
+
+#endif
+
+#if !defined ( GBS390X )
+
+    // detect the s390x architecture
+    #if defined (__s390x__)
+        #define GBS390X 1
+        #else
+        #define GBS390X 0
+    #endif
+
+#endif
+
 //------------------------------------------------------------------------------
 // AVX2 and AVX512F support for the x86_64 architecture
 //------------------------------------------------------------------------------
@@ -336,7 +361,7 @@
 
 // prefix for function with target rvv1.0
 #if GB_COMPILER_SUPPORTS_RVV1
-        #define GB_TARGET_RVV1 __attribute__ ((target ("arch=+v")))
+    #define GB_TARGET_RVV1 __attribute__ ((target ("arch=+v")))
 #else
     #define GB_TARGET_RVV1
 #endif
@@ -353,5 +378,15 @@
 
 #endif
 
+//------------------------------------------------------------------------------
+// workaround for a bug in gcc for Power and s390x
+//------------------------------------------------------------------------------
+
+#if ( GB_COMPILER_GCC && ( GBPPC || GBS390X ) )
+    #ifndef GCC_PPC_BUG
+    #define GCC_PPC_BUG
+    #endif
+#endif
+
 #endif
 
diff --git a/GraphBLAS/Source/jitifyer/GB_jitifyer.c b/GraphBLAS/Source/jitifyer/GB_jitifyer.c
index c0ff71f85..95305b9fa 100644
--- a/GraphBLAS/Source/jitifyer/GB_jitifyer.c
+++ b/GraphBLAS/Source/jitifyer/GB_jitifyer.c
@@ -279,6 +279,11 @@ void GB_jitifyer_sanitize (char *string, size_t len)
 
 GrB_Info GB_jitifyer_init (void)
 { 
+    #if defined ( GRAPHBLAS_HAS_CUDA )
+    int device = -1 ;
+    GB_cuda_get_device (&device) ;
+    printf ("JIT init, device %d\n", device) ;
+    #endif
 
     //--------------------------------------------------------------------------
     // initialize the JIT control
diff --git a/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c b/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c
new file mode 100644
index 000000000..40dea55c0
--- /dev/null
+++ b/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c
@@ -0,0 +1,104 @@
+//------------------------------------------------------------------------------
+// GB_AxB_saxpy3_symbolic_fine_template: symbolic analysis for GB_AxB_saxpy3
+//------------------------------------------------------------------------------
+
+// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2025, All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+//------------------------------------------------------------------------------
+
+// phase1 of saxpy3 symbolic, for fine hash tasks.  This method must be done
+// in a single thread when using GCC on the Power or s390x architectures.
+// Otherwise, it is done in parallel.
+
+{
+
+    //----------------------------------------------------------
+    // phase1: fine hash task, C<M>=A*B or C<!M>=A*B
+    //----------------------------------------------------------
+
+    // If M_in_place is true, this is skipped.  The mask M is dense, and is
+    // used in-place.
+
+    // The least significant 2 bits of Hf [hash] is the flag f, and the upper
+    // bits contain h, as (h,f).  After this phase1, if M(i,j)=1 then the hash
+    // table contains ((i+1),1) in Hf [hash] at some location.
+
+    // Later, the flag values of f = 2 and 3 are also used.
+    // Only f=1 is set in this phase.
+
+    // h == 0,   f == 0: unoccupied and unlocked
+    // h == i+1, f == 1: occupied with M(i,j)=1
+
+    uint64_t *restrict
+        Hf = (uint64_t *restrict) SaxpyTasks [taskid].Hf ;
+    uint64_t hash_bits = (hash_size-1) ;
+    // scan this task's M(:,j)
+    for (int64_t pM = mystart ; pM < myend ; pM++)
+    {
+        GB_GET_M_ij (pM) ;              // get M(i,j)
+        if (!mij) continue ;            // skip if M(i,j)=0
+        uint64_t i = GBi_M (Mi, pM, mvlen) ;
+        uint64_t i_mine = ((i+1) << 2) + 1 ;  // ((i+1),1)
+        for (GB_HASH (i))
+        { 
+            // swap this task's hash entry into the hash table;
+            // does the following using an atomic capture:
+            uint64_t hf ;
+
+            #ifdef GCC_PPC_BUG
+            {
+                // NOTE: the 64-bit atomic capture fails with gcc 9.5.0 and
+                // 14.2.0 on the IBM Power8NVL and s903x.  It works with
+                // ibm-clang and clang 18.1.8 on the same Power8NVL system.
+                // This works but it may have performance issues since this is
+                // fixed by using this algorithm with a single thread that does
+                // all fine hash tasks:
+                { hf = Hf [hash] ; Hf [hash] = i_mine ; }
+            }
+            #else
+            {
+                // This fails when using gcc on the Power8 or s390x, but it
+                // works fine on all other architectures.  It also works with
+                // clang on Power8 and x390x.
+                GB_ATOMIC_CAPTURE_UINT64 (hf, Hf [hash], i_mine) ;
+            }
+            #endif
+
+            // Other methods tried:
+            // This fails too, when using gcc on the Power8:
+            // __atomic_exchange (&(Hf [hash]), &i_mine, &hf, __ATOMIC_SEQ_CST);
+
+            // This also fails:
+            // hf = __atomic_exchange_n (&(Hf [hash]), &i_mine,
+            //    __ATOMIC_SEQ_CST) ;
+            // __sync_synchronize ( ) ;
+
+
+            // This doesn't work; it requires amo.h which reports an error on
+            // the Power8NVL.  The Power8 doesn't implement the v3.0 ISA,
+            // required by amo_ldat_swap.
+            // hf = i_mine ;
+            // _amo_ldat_swap (&hf, &(Hf [hash])) ;
+
+            // This printf makes the GB_ATOMIC_CAPTURE work, if it is added!!
+            // printf ("   Hf [%ld] = %ld, i = %ld, i_mine = %ld\n", hash,
+            //      Hf [hash], i, i_mine) ;
+
+            // Because of this failure, gcc must be used with caution when
+            // compiling GraphBLAS on the Power or s390 processor.  It cannot
+            // use the GB_ATOMIC_CAPTURE_UINT64 defined in
+            // Source/omp/include/GB_atomics.h.  If GraphBLAS is compiled with
+            // gcc on the Power or s390x systems, GCC_PPC_BUG is #defined to
+            // avoid this bug.
+
+            if (hf == 0) break ;        // success
+            // i_mine has been inserted, but a prior entry was
+            // already there.  It needs to be replaced, so take
+            // ownership of this displaced entry, and keep
+            // looking until a new empty slot is found for it.
+            i_mine = hf ;
+        }
+    }
+}
+
diff --git a/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_template.c b/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_template.c
index 493c72d54..3ff2eae36 100644
--- a/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_template.c
+++ b/GraphBLAS/Source/mxm/factory/GB_AxB_saxpy3_symbolic_template.c
@@ -119,6 +119,10 @@ void GB_EVAL2 (GB (AxB_saxpy3_sym), GB_MASK_A_B_SUFFIX)
     // Hi and Hx are not initialized.
 
     int taskid ;
+    #if defined ( GCC_PPC_BUG ) && ( !GB_NO_MASK )
+    bool punt = false ;
+    #endif
+
     #pragma omp parallel for num_threads(nthreads) schedule(static,1)
     for (taskid = 0 ; taskid < ntasks ; taskid++)
     {
@@ -183,62 +187,20 @@ void GB_EVAL2 (GB (AxB_saxpy3_sym), GB_MASK_A_B_SUFFIX)
 
                 }
                 else if (!M_in_place)
-                {
+                { 
 
                     //----------------------------------------------------------
-                    // phase1: fine hash task, C<M>=A*B or C<!M>=A*B
+                    // phase1: fine hash task, C<M>=A*B or C<!M>=A*B (parallel)
                     //----------------------------------------------------------
 
-                    // If M_in_place is true, this is skipped.  The mask
-                    // M is dense, and is used in-place.
-
-                    // The least significant 2 bits of Hf [hash] is the flag f,
-                    // and the upper bits contain h, as (h,f).  After this
-                    // phase1, if M(i,j)=1 then the hash table contains
-                    // ((i+1),1) in Hf [hash] at some location.
-
-                    // Later, the flag values of f = 2 and 3 are also used.
-                    // Only f=1 is set in this phase.
-
-                    // h == 0,   f == 0: unoccupied and unlocked
-                    // h == i+1, f == 1: occupied with M(i,j)=1
-
-                    uint64_t *restrict
-                        Hf = (uint64_t *restrict) SaxpyTasks [taskid].Hf ;
-                    uint64_t hash_bits = (hash_size-1) ;
-                    // scan this task's M(:,j)
-                    for (int64_t pM = mystart ; pM < myend ; pM++)
-                    {
-                        GB_GET_M_ij (pM) ;              // get M(i,j)
-                        if (!mij) continue ;            // skip if M(i,j)=0
-                        uint64_t i = GBi_M (Mi, pM, mvlen) ;
-                        uint64_t i_mine = ((i+1) << 2) + 1 ;  // ((i+1),1)
-                        for (GB_HASH (i))
-                        { 
-                            uint64_t hf ;
-                            // swap this task's hash entry into the hash table;
-                            // does the following using an atomic capture:
-// WARNING: atomic capture fails with gcc 14.2.0 on the IBM Power8!
-// It works with ibm-clang and clang 18.1.8 on the same system.
-// This works (with one thread):
-                            // { hf = Hf [hash] ; Hf [hash] = i_mine ; }
-// This fails:
-                            GB_ATOMIC_CAPTURE_UINT64 (hf, Hf [hash], i_mine) ;
-// This fails too, when using gcc on the Power8:
-// __atomic_exchange (&(Hf [hash]), &i_mine, &hf, __ATOMIC_SEQ_CST) ;
-// This printf makes the GB_ATOMIC_CAPTURE work, if it is added!!
-// printf ("   Hf [%ld] = %ld, i = %ld, i_mine = %ld\n", hash, Hf [hash], i, i_mine) ;
-//
-// Because of this failure, gcc cannot be used to compile GraphBLAS on
-// the Power processor.  The cmake script has been modified accordingly.
-                            if (hf == 0) break ;        // success
-                            // i_mine has been inserted, but a prior entry was
-                            // already there.  It needs to be replaced, so take
-                            // ownership of this displaced entry, and keep
-                            // looking until a new empty slot is found for it.
-                            i_mine = hf ;
-                        }
-                    }
+                    #ifdef GCC_PPC_BUG
+                    // This fine hash task is skipped and done below, outside
+                    // of this parallel region.
+                    GB_ATOMIC_WRITE
+                    punt = true ;
+                    #else
+                    #include "mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c"
+                    #endif
                 }
             }
             #endif
@@ -457,6 +419,60 @@ void GB_EVAL2 (GB (AxB_saxpy3_sym), GB_MASK_A_B_SUFFIX)
         }
     }
 
+    //==========================================================================
+    // phase 1: punt, for gcc on Power8 or s390x
+    //==========================================================================
+
+    // A single thread is used to do all fine hash tasks, when M_in_place
+    // is false.
+
+    #if defined ( GCC_PPC_BUG ) && ( !GB_NO_MASK )
+    if (punt)
+    {
+        for (taskid = 0 ; taskid < nfine ; taskid++)
+        {
+
+            //------------------------------------------------------------------
+            // get the task descriptor
+            //------------------------------------------------------------------
+
+            uint64_t hash_size = SaxpyTasks [taskid].hsize ;
+            bool use_Gustavson = (hash_size == cvlen) ;
+
+            if (!use_Gustavson && !M_in_place)
+            {
+
+                //--------------------------------------------------------------
+                // get the task descriptor
+                //--------------------------------------------------------------
+
+                int64_t kk = SaxpyTasks [taskid].vector ;
+                int64_t bjnz = (Bp == NULL) ? bvlen :
+                    (GB_IGET (Bp, kk+1) - GB_IGET (Bp, kk)) ;
+                // no work to do if B(:,j) is empty
+                if (bjnz == 0) continue ;
+
+                // partition M(:,j)
+                GB_GET_M_j ;        // get M(:,j)
+
+                int team_size = SaxpyTasks [taskid].team_size ;
+                int leader    = SaxpyTasks [taskid].leader ;
+                int my_teamid = taskid - leader ;
+                int64_t mystart, myend ;
+                GB_PARTITION (mystart, myend, mjnz, my_teamid, team_size) ;
+                mystart += pM_start ;
+                myend   += pM_start ;
+
+                //----------------------------------------------------------
+                // phase1: fine hash task, C<M>=A*B or C<!M>=A*B (1 thread)
+                //----------------------------------------------------------
+
+                #include "mxm/factory/GB_AxB_saxpy3_symbolic_fine_template.c"
+            }
+        }
+    }
+    #endif
+
     //--------------------------------------------------------------------------
     // check result for phase1 for fine tasks
     //--------------------------------------------------------------------------
diff --git a/GraphBLAS/Tcov/log_May29.txt b/GraphBLAS/Tcov/log_May29.txt
new file mode 100644
index 000000000..926973530
--- /dev/null
+++ b/GraphBLAS/Tcov/log_May29.txt
@@ -0,0 +1,327 @@
+29-May-2025 10:54:56 grbcov starting
+total blocks: 19541
+
+---------------------------------------------- [cover]
+[malloc debugging turned off]
+29-May 10:56:39 test299     0:(32,32,32)     0.0 sec  152: 19171  1.9%  6097.3/s
+29-May 10:56:41 test298     0:(32,32,32)     1.9 sec  406: 18765  4.0%   217.4/s
+29-May 10:56:41 test298     0:(32,32,32)     0.0 sec   62: 18703  4.3%  3136.9/s
+29-May 10:56:41 test297     0:(32,32,32)     0.3 sec  132: 18571  5.0%   412.9/s
+29-May 10:56:41 test295     0:(32,32,32)     0.0 sec   48: 18521  5.2%  1860.5/s
+29-May 10:56:41 test294     0:(32,32,32)     0.1 sec   16: 18505  5.3%   165.6/s
+29-May 10:56:45 test293     0:(32,32,32)     3.3 sec   65: 18440  5.6%    19.9/s
+29-May 10:56:45 test291     0:(32,32,32)     0.0 sec   16: 18424  5.7%   580.3/s
+29-May 10:56:45 test291     1:(32,32,64)     0.0 sec    1: 18421  5.7%  2915.5/s
+29-May 10:56:45 test291     2:(32,64,32)     0.0 sec    4: 18417  5.8% 11594.2/s
+29-May 10:56:45 test291     4:(64,32,32)     0.0 sec    1: 18416  5.8%  4784.7/s
+29-May 10:56:46 test290     0:(32,32,32)     1.6 sec    2: 18414  5.8%     1.3/s
+29-May 10:56:46 test287     0:(32,32,32)     0.0 sec   35: 18379  5.9%  1073.9/s
+29-May 10:56:46 test287     4:(64,32,32)     0.0 sec     : 18379  5.9%
+29-May 10:56:47 test286     0:(32,32,32)     0.9 sec   52: 18327  6.2%    59.3/s
+29-May 10:56:47 test286     0:(32,32,32)     0.0 sec    9: 18318  6.3%  3197.2/s
+29-May 10:56:48 test286     1:(32,32,64)     1.0 sec     : 18318  6.3%
+29-May 10:56:48 test286     1:(32,32,64)     0.0 sec    1: 18317  6.3%   758.7/s
+29-May 10:56:49 test286     2:(32,64,32)     0.8 sec     : 18317  6.3%
+29-May 10:56:49 test286     2:(32,64,32)     0.0 sec     : 18317  6.3%
+29-May 10:56:50 test286     4:(64,32,32)     0.9 sec    1: 18316  6.3%     1.1/s
+29-May 10:56:50 test286     4:(64,32,32)     0.0 sec     : 18316  6.3%
+29-May 10:56:51 test78      0:(32,32,32)     0.6 sec   25: 18291  6.4%    41.6/s
+29-May 10:56:51 test78      0:(32,32,32)     0.0 sec     : 18291  6.4%
+29-May 10:56:51 test78      4:(64,32,32)     0.3 sec    1: 18290  6.4%     3.4/s
+29-May 10:56:51 test78      4:(64,32,32)     0.0 sec     : 18290  6.4%
+29-May 10:56:52 test285     0:(32,32,32)     0.8 sec   44: 18246  6.6%    54.8/s
+29-May 10:56:52 test285     0:(32,32,32)     0.0 sec   10: 18236  6.7%  1736.4/s
+29-May 10:56:52 test247     0:(32,32,32)     0.2 sec   23: 18213  6.8%   109.3/s
+29-May 10:56:52 test247     0:(32,32,32)     0.1 sec    5: 18208  6.8%    46.0/s
+29-May 10:56:52 test109     0:(32,32,32)     0.2 sec   33: 18175  7.0%   171.8/s
+29-May 10:56:52 test109     0:(32,32,32)     0.0 sec    2: 18173  7.0%   390.9/s
+29-May 10:56:52 test109     0:(32,32,32)     0.1 sec   21: 18152  7.1%   168.2/s
+29-May 10:56:52 test109     0:(32,32,32)     0.0 sec    1: 18151  7.1%  1112.3/s
+29-May 10:56:53 test138     0:(32,32,32)     0.1 sec   35: 18116  7.3%   246.8/s
+29-May 10:56:53 test138     0:(32,32,32)     0.0 sec    1: 18115  7.3%    50.3/s
+29-May 10:56:53 test172     0:(32,32,32)     0.1 sec   42: 18072  7.5%   677.4/s
+29-May 10:56:53 test172     0:(32,32,32)     0.0 sec    4: 18068  7.5%   135.4/s
+29-May 10:56:53 test155     0:(32,32,32)     0.1 sec  122: 17946  8.2%  2071.2/s
+29-May 10:56:53 test155     0:(32,32,32)     0.0 sec    5: 17941  8.2%   225.6/s
+29-May 10:56:53 test155     2:(32,64,32)     0.0 sec    2: 17939  8.2%   112.1/s
+29-May 10:56:53 test155     2:(32,64,32)     0.0 sec     : 17939  8.2%
+29-May 10:56:53 test155     4:(64,32,32)     0.0 sec    1: 17938  8.2%    55.2/s
+29-May 10:56:53 test155     4:(64,32,32)     0.0 sec     : 17938  8.2%
+29-May 10:56:53 test174     0:(32,32,32)     0.2 sec   19: 17919  8.3%    87.2/s
+29-May 10:56:53 test174     0:(32,32,32)     0.0 sec    6: 17913  8.3%  1471.3/s
+29-May 10:56:53 test203     0:(32,32,32)     0.0 sec   17: 17896  8.4%   610.6/s
+29-May 10:56:53 test213     0:(32,32,32)     0.1 sec   11: 17885  8.5%   100.1/s
+29-May 10:56:53 test213     0:(32,32,32)     0.0 sec    1: 17884  8.5%   784.9/s
+29-May 10:56:53 test216     0:(32,32,32)     0.0 sec   12: 17872  8.5%   366.0/s
+29-May 10:56:54 test225     0:(32,32,32)     0.3 sec   23: 17849  8.7%    80.5/s
+29-May 10:56:54 test225     0:(32,32,32)     0.0 sec   29: 17820  8.8%   586.3/s
+29-May 10:56:54 test226     0:(32,32,32)     0.2 sec   11: 17809  8.9%    56.3/s
+29-May 10:56:54 test226     0:(32,32,32)     0.0 sec    2: 17807  8.9%   366.4/s
+29-May 10:56:54 test235     0:(32,32,32)     0.1 sec   19: 17788  9.0%   272.5/s
+29-May 10:56:54 test235     0:(32,32,32)     0.0 sec    3: 17785  9.0%   286.9/s
+29-May 10:56:54 test252     0:(32,32,32)     0.0 sec   18: 17767  9.1%   662.1/s
+29-May 10:56:54 test253     0:(32,32,32)     0.1 sec   30: 17737  9.2%   400.5/s
+29-May 10:56:54 test255     0:(32,32,32)     0.0 sec    8: 17729  9.3%   295.5/s
+29-May 10:56:55 test257     0:(32,32,32)     0.5 sec   53: 17676  9.5%   101.5/s
+29-May 10:56:55 test257     0:(32,32,32)     0.0 sec    2: 17674  9.6%  3333.3/s
+29-May 10:56:55 test260     0:(32,32,32)     0.0 sec    3: 17671  9.6%   113.1/s
+29-May 10:56:55 test261     0:(32,32,32)     0.0 sec   37: 17634  9.8%  1536.4/s
+29-May 10:56:55 test262     0:(32,32,32)     0.0 sec   16: 17618  9.8%   664.9/s
+29-May 10:56:55 test263     0:(32,32,32)     0.3 sec   12: 17606  9.9%    38.4/s
+29-May 10:56:55 test263     0:(32,32,32)     0.0 sec    1: 17605  9.9%   364.0/s
+29-May 10:56:55 test264     0:(32,32,32)     0.0 sec  147: 17458 10.7%  3514.5/s
+29-May 10:56:56 test265     0:(32,32,32)     0.5 sec   17: 17441 10.7%    31.7/s
+29-May 10:56:56 test265     0:(32,32,32)     0.0 sec    1: 17440 10.8%  1257.9/s
+29-May 10:56:56 test267     0:(32,32,32)     0.2 sec   16: 17424 10.8%    68.1/s
+29-May 10:56:56 test269     0:(32,32,32)     0.0 sec  125: 17299 11.5%  4278.0/s
+29-May 10:56:56 test271     0:(32,32,32)     0.0 sec  543: 16756 14.3% 13625.8/s
+29-May 10:56:56 test272     0:(32,32,32)     0.0 sec    8: 16748 14.3%   313.0/s
+29-May 10:56:56 test273     0:(32,32,32)     0.1 sec  126: 16622 14.9%  1652.9/s
+29-May 10:56:56 test274     0:(32,32,32)     0.0 sec  119: 16503 15.5%  4044.2/s
+29-May 10:56:56 test276     0:(32,32,32)     0.2 sec 1695: 14808 24.2%  8153.7/s
+29-May 10:56:56 test277     0:(32,32,32)     0.0 sec   37: 14771 24.4%  1371.3/s
+29-May 10:56:56 test279     0:(32,32,32)     0.0 sec   67: 14704 24.8%  2398.7/s
+29-May 10:56:56 test281     0:(32,32,32)     0.0 sec   14: 14690 24.8%   510.3/s
+29-May 10:56:57 test268     0:(32,32,32)     0.3 sec    4: 14686 24.8%    15.9/s
+29-May 10:56:57 test268     0:(32,32,32)     0.0 sec    4: 14682 24.9%   841.8/s
+29-May 10:56:57 test207     0:(32,32,32)     0.0 sec    7: 14675 24.9%  1799.9/s
+29-May 10:56:57 test207     1:(32,32,64)     0.0 sec    1: 14674 24.9%  1470.6/s
+29-May 10:56:57 test211     0:(32,32,32)     0.5 sec   23: 14651 25.0%    50.4/s
+29-May 10:56:57 test211     0:(32,32,32)     0.0 sec    6: 14645 25.1%  1231.3/s
+29-May 10:56:57 test183     0:(32,32,32)     0.1 sec   18: 14627 25.1%   120.7/s
+29-May 10:56:58 test212     0:(32,32,32)     0.3 sec   10: 14617 25.2%    37.6/s
+29-May 10:56:58 test212     0:(32,32,32)     0.0 sec    5: 14612 25.2%  2137.7/s
+29-May 10:56:58 test219     0:(32,32,32)     0.0 sec    8: 14604 25.3%   277.9/s
+29-May 10:56:58 test219     0:(32,32,32)     0.0 sec    4: 14600 25.3%  6299.2/s
+[malloc debugging turned on]
+29-May 10:56:58 test296     0:(32,32,32)     0.0 sec   28: 14572 25.4%  7104.8/s
+29-May 10:56:58 test289     0:(32,32,32)     0.2 sec   83: 14489 25.9%   394.2/s
+29-May 10:56:58 test288     0:(32,32,32)     0.0 sec   20: 14469 26.0%   740.2/s
+29-May 10:56:58 test244     0:(32,32,32)     0.1 sec   26: 14443 26.1%   354.6/s
+29-May 10:56:58 test244     1:(32,32,64)     0.0 sec    2: 14441 26.1%    70.5/s
+29-May 10:56:58 test194     0:(32,32,32)     0.1 sec   24: 14417 26.2%   238.7/s
+29-May 10:56:58 test09      0:(32,32,32)     0.2 sec   11: 14406 26.3%    45.7/s
+29-May 10:56:58 test09      0:(32,32,32)     0.0 sec    4: 14402 26.3%  2442.0/s
+29-May 10:56:59 test108     0:(32,32,32)     0.2 sec   51: 14351 26.6%   260.5/s
+29-May 10:56:59 test108     0:(32,32,32)     0.0 sec   25: 14326 26.7%   682.7/s
+29-May 10:56:59 test137     0:(32,32,32)     0.1 sec   13: 14313 26.8%   100.6/s
+29-May 10:56:59 test137     0:(32,32,32)     0.0 sec    1: 14312 26.8%   405.8/s
+29-May 10:56:59 test137     0:(32,32,32)     0.0 sec    1: 14311 26.8%   254.6/s
+29-May 10:56:59 test124     0:(32,32,32)     0.2 sec    6: 14305 26.8%    37.9/s
+29-May 10:57:03 test133     0:(32,32,32)     4.0 sec   12: 14293 26.9%     3.0/s
+29-May 10:57:08 test133     0:(32,32,32)     4.7 sec   21: 14272 27.0%     4.5/s
+29-May 10:57:09 test176     0:(32,32,32)     1.7 sec   26: 14246 27.1%    15.0/s
+29-May 10:57:09 test176     0:(32,32,32)     0.1 sec   10: 14236 27.1%   137.9/s
+29-May 10:57:10 test197     0:(32,32,32)     0.2 sec   12: 14224 27.2%    63.9/s
+29-May 10:57:10 test197     0:(32,32,32)     0.2 sec    3: 14221 27.2%    18.0/s
+29-May 10:57:10 test201     0:(32,32,32)     0.1 sec   23: 14198 27.3%   402.6/s
+29-May 10:57:10 test208     0:(32,32,32)     0.1 sec   17: 14181 27.4%   277.2/s
+29-May 10:57:10 test214     0:(32,32,32)     0.0 sec   39: 14142 27.6%  9639.1/s
+29-May 10:57:10 test214     0:(32,32,32)     0.0 sec    5: 14137 27.7%  1958.5/s
+29-May 10:57:10 test214     1:(32,32,64)     0.0 sec    1: 14136 27.7%   387.0/s
+29-May 10:57:10 test214     1:(32,32,64)     0.0 sec     : 14136 27.7%
+29-May 10:57:10 test223     0:(32,32,32)     0.0 sec   11: 14125 27.7%  1158.1/s
+29-May 10:57:10 test223     0:(32,32,32)     0.0 sec    1: 14124 27.7%    66.9/s
+29-May 10:57:10 test241     0:(32,32,32)     0.1 sec   54: 14070 28.0%   860.7/s
+29-May 10:57:10 test241     0:(32,32,32)     0.0 sec    8: 14062 28.0%   208.0/s
+29-May 10:57:10 test270     0:(32,32,32)     0.0 sec  288: 13774 29.5%  8684.4/s
+29-May 10:57:10 test199     0:(32,32,32)     0.0 sec   16: 13758 29.6%  4238.4/s
+29-May 10:57:10 test210     0:(32,32,32)     0.1 sec    1: 13757 29.6%     7.5/s
+29-May 10:57:10 test210     0:(32,32,32)     0.0 sec    3: 13754 29.6%  3937.0/s
+29-May 10:57:10 test165     0:(32,32,32)     0.0 sec   13: 13741 29.7%  4571.0/s
+29-May 10:57:10 test221     0:(32,32,32)     0.1 sec    6: 13735 29.7%    63.3/s
+29-May 10:57:10 test221     0:(32,32,32)     0.0 sec    2: 13733 29.7%  1857.0/s
+29-May 10:57:11 test278     0:(32,32,32)     0.0 sec   53: 13680 30.0%  1938.4/s
+29-May 10:57:11 test162     0:(32,32,32)     0.0 sec   20: 13660 30.1%   993.3/s
+29-May 10:57:11 test162     0:(32,32,32)     0.0 sec    1: 13659 30.1%    41.0/s
+29-May 10:57:11 test275     0:(32,32,32)     0.0 sec   27: 13632 30.2%   839.1/s
+29-May 10:57:11 test220     0:(32,32,32)     0.2 sec    9: 13623 30.3%    50.4/s
+29-May 10:57:11 test83      0:(32,32,32)     0.3 sec    7: 13616 30.3%    26.1/s
+29-May 10:57:11 test83      0:(32,32,32)     0.0 sec    1: 13615 30.3%  1443.0/s
+29-May 10:57:12 test04      0:(32,32,32)     0.7 sec   13: 13602 30.4%    19.7/s
+29-May 10:57:12 test04      0:(32,32,32)     0.0 sec    8: 13594 30.4%  1300.8/s
+29-May 10:57:12 test132     0:(32,32,32)     0.0 sec   12: 13582 30.5%   333.7/s
+29-May 10:57:12 test82      0:(32,32,32)     0.4 sec   13: 13569 30.6%    33.5/s
+29-May 10:57:12 test202     0:(32,32,32)     0.0 sec   71: 13498 30.9%  4038.5/s
+29-May 10:57:12 test202     0:(32,32,32)     0.0 sec    2: 13496 30.9%   111.1/s
+29-May 10:57:12 test202     0:(32,32,32)     0.0 sec    4: 13492 31.0%   383.1/s
+29-May 10:57:12 test202     1:(32,32,64)     0.0 sec     : 13492 31.0%
+29-May 10:57:12 test202     1:(32,32,64)     0.0 sec    1: 13491 31.0%    90.5/s
+29-May 10:57:12 test202     1:(32,32,64)     0.0 sec     : 13491 31.0%
+29-May 10:57:12 test202     2:(32,64,32)     0.0 sec    1: 13490 31.0%   110.6/s
+29-May 10:57:12 test202     2:(32,64,32)     0.0 sec     : 13490 31.0%
+29-May 10:57:12 test202     2:(32,64,32)     0.0 sec     : 13490 31.0%
+29-May 10:57:12 test222     0:(32,32,32)     0.1 sec   40: 13450 31.2%   688.0/s
+29-May 10:57:12 test204     0:(32,32,32)     0.0 sec    9: 13441 31.2%   325.3/s
+29-May 10:57:13 test258     0:(32,32,32)     0.3 sec   13: 13428 31.3%    50.8/s
+29-May 10:57:13 test258     0:(32,32,32)     0.0 sec    2: 13426 31.3%   751.6/s
+29-May 10:57:13 test258     1:(32,32,64)     0.1 sec    1: 13425 31.3%    14.2/s
+29-May 10:57:13 test258     1:(32,32,64)     0.0 sec     : 13425 31.3%
+29-May 10:57:14 test136     0:(32,32,32)     1.0 sec    7: 13418 31.3%     6.7/s
+29-May 10:57:14 test136     0:(32,32,32)     0.0 sec   62: 13356 31.7%  5466.9/s
+29-May 10:57:15 test128     0:(32,32,32)     0.8 sec   52: 13304 31.9%    63.8/s
+29-May 10:57:15 test128     0:(32,32,32)     0.1 sec    1: 13303 31.9%     9.0/s
+29-May 10:57:15 test144     0:(32,32,32)     0.2 sec    5: 13298 31.9%    22.0/s
+29-May 10:57:17 test81      0:(32,32,32)     2.3 sec   39: 13259 32.1%    17.0/s
+[malloc debugging turned off]
+29-May 10:57:18 testc2(0,0) 0:(32,32,32)     0.4 sec  179: 13080 33.1%   403.0/s
+29-May 10:57:18 testc2(0,0) 1:(32,32,64)     0.3 sec    1: 13079 33.1%     3.6/s
+29-May 10:57:18 test239     0:(32,32,32)     0.0 sec   10: 13069 33.1%  1068.9/s
+29-May 10:57:18 test239     0:(32,32,32)     0.4 sec    1: 13068 33.1%     2.8/s
+29-May 10:57:19 test245     0:(32,32,32)     0.3 sec   32: 13036 33.3%    91.5/s
+29-May 10:57:19 test245     0:(32,32,32)     0.0 sec    8: 13028 33.3%  1889.5/s
+29-May 10:57:19 test159     0:(32,32,32)     0.3 sec   39: 12989 33.5%   129.8/s
+29-May 10:57:20 test259     0:(32,32,32)     1.0 sec   27: 12962 33.7%    26.8/s
+29-May 10:57:20 test259     0:(32,32,32)     0.0 sec    1: 12961 33.7%   168.9/s
+29-May 10:57:21 testc4(0)   0:(32,32,32)     1.2 sec   11: 12950 33.7%     9.1/s
+29-May 10:57:22 test157     0:(32,32,32)     0.6 sec   40: 12910 33.9%    65.5/s
+29-May 10:57:24 test182     0:(32,32,32)     2.0 sec   22: 12888 34.0%    11.0/s
+29-May 10:57:24 test182     0:(32,32,32)     0.3 sec   13: 12875 34.1%    51.5/s
+29-May 10:57:26 test195     0:(32,32,32)     2.0 sec   63: 12812 34.4%    31.4/s
+29-May 10:57:29 test135     0:(32,32,32)     3.1 sec   43: 12769 34.7%    13.7/s
+29-May 10:57:30 test215     0:(32,32,32)     0.1 sec    2: 12767 34.7%    23.9/s
+29-May 10:57:32 test80      0:(32,32,32)     2.4 sec   11: 12756 34.7%     4.5/s
+29-May 10:57:33 test200     0:(32,32,32)     0.7 sec   11: 12745 34.8%    16.2/s
+29-May 10:57:35 test283     0:(32,32,32)     2.2 sec   93: 12652 35.3%    41.7/s
+29-May 10:57:37 test283     1:(32,32,64)     1.8 sec    1: 12651 35.3%     0.6/s
+29-May 10:57:37 test254     0:(32,32,32)     0.3 sec   25: 12626 35.4%    89.3/s
+29-May 10:57:38 test254     0:(32,32,32)     1.1 sec    1: 12625 35.4%     0.9/s
+29-May 10:57:41 test54      0:(32,32,32)     3.3 sec   26: 12598 35.5%     7.9/s
+29-May 10:57:43 test54      0:(32,32,32)     1.2 sec   13: 12585 35.6%    10.7/s
+29-May 10:57:45 testcc(1)   0:(32,32,32)     2.3 sec   10: 12575 35.6%     4.4/s
+29-May 10:57:46 testcc(1)   0:(32,32,32)     1.4 sec    6: 12569 35.7%     4.3/s
+29-May 10:57:47 testc2(1,1) 0:(32,32,32)     0.3 sec   11: 12558 35.7%    32.1/s
+29-May 10:57:49 testc2(1,1) 0:(32,32,32)     2.8 sec    3: 12555 35.8%     1.1/s
+29-May 10:57:51 test141     0:(32,32,32)     1.4 sec  521: 12034 38.4%   381.6/s
+29-May 10:57:51 test179     0:(32,32,32)     0.0 sec   22: 12012 38.5%   493.3/s
+29-May 10:57:52 test179     0:(32,32,32)     0.7 sec   10: 12002 38.6%    14.2/s
+29-May 10:57:52 test188b    0:(32,32,32)     0.0 sec   39: 11963 38.8%   997.8/s
+29-May 10:57:52 test185     0:(32,32,32)     0.0 sec   23: 11940 38.9%   559.3/s
+29-May 10:57:52 test256     0:(32,32,32)     0.2 sec   38: 11902 39.1%   181.5/s
+29-May 10:57:52 test256     0:(32,32,32)     0.0 sec     : 11902 39.1%
+29-May 10:57:52 test256     1:(32,32,64)     0.2 sec    1: 11901 39.1%     5.3/s
+29-May 10:57:52 test256     1:(32,32,64)     0.0 sec     : 11901 39.1%
+29-May 10:57:53 test238b    0:(32,32,32)     0.8 sec   31: 11870 39.3%    39.5/s
+29-May 10:57:53 test238     0:(32,32,32)     0.5 sec   64: 11806 39.6%   128.5/s
+29-May 10:57:54 test186     0:(32,32,32)     0.9 sec   25: 11781 39.7%    27.5/s
+29-May 10:57:54 test186     0:(32,32,32)     0.1 sec     : 11781 39.7%
+29-May 10:57:55 test186     0:(32,32,32)     0.1 sec     : 11781 39.7%
+[malloc debugging turned on]
+29-May 10:57:56 testca(1)   0:(32,32,32)     1.8 sec   38: 11743 39.9%    21.4/s
+29-May 10:57:58 testca(1)   0:(32,32,32)     1.7 sec    2: 11741 39.9%     1.2/s
+29-May 10:57:59 test148     0:(32,32,32)     0.6 sec    7: 11734 40.0%    12.5/s
+29-May 10:57:59 test148     0:(32,32,32)     0.0 sec    4: 11730 40.0%  1595.5/s
+29-May 10:58:00 test231     0:(32,32,32)     1.6 sec  385: 11345 41.9%   236.5/s
+29-May 10:58:01 test129     0:(32,32,32)     0.7 sec   12: 11333 42.0%    18.5/s
+29-May 10:58:06 test69      0:(32,32,32)     5.0 sec   37: 11296 42.2%     7.3/s
+29-May 10:58:10 test69      0:(32,32,32)     3.7 sec   12: 11284 42.3%     3.2/s
+29-May 10:58:12 test29      0:(32,32,32)     1.9 sec  151: 11133 43.0%    79.5/s
+29-May 10:58:13 test29      0:(32,32,32)     1.8 sec    2: 11131 43.0%     1.1/s
+29-May 10:58:15 test29      1:(32,32,64)     1.8 sec    2: 11129 43.0%     1.1/s
+29-May 10:58:17 test29      1:(32,32,64)     1.8 sec     : 11129 43.0%
+29-May 10:58:17 test282     0:(32,32,32)     0.4 sec   15: 11114 43.1%    40.3/s
+29-May 10:58:18 test249     0:(32,32,32)     0.3 sec   30: 11084 43.3%    86.2/s
+29-May 10:58:18 test249     0:(32,32,32)     0.3 sec    1: 11083 43.3%     3.1/s
+29-May 10:58:19 test196     0:(32,32,32)     0.5 sec   18: 11065 43.4%    34.0/s
+29-May 10:58:19 test250     0:(32,32,32)     0.6 sec   77: 10988 43.8%   124.7/s
+29-May 10:58:20 test250     0:(32,32,32)     0.8 sec    4: 10984 43.8%     5.2/s
+29-May 10:58:21 test145     0:(32,32,32)     0.7 sec   22: 10962 43.9%    30.9/s
+29-May 10:58:21 test145     0:(32,32,32)     0.0 sec    6: 10956 43.9%  1161.2/s
+29-May 10:58:28 test229     0:(32,32,32)     7.0 sec   14: 10942 44.0%     2.0/s
+29-May 10:58:30 test209     0:(32,32,32)     2.1 sec   44: 10898 44.2%    21.3/s
+29-May 10:58:32 test209     1:(32,32,64)     2.1 sec    1: 10897 44.2%     0.5/s
+29-May 10:58:33 test224     0:(32,32,32)     1.5 sec   60: 10837 44.5%    41.4/s
+29-May 10:58:34 test191     0:(32,32,32)     0.5 sec   26: 10811 44.7%    55.5/s
+29-May 10:58:34 test191     0:(32,32,32)     0.1 sec    2: 10809 44.7%    22.1/s
+29-May 10:58:34 test150     0:(32,32,32)     0.0 sec   20: 10789 44.8%   593.4/s
+29-May 10:58:34 test240     0:(32,32,32)     0.3 sec   26: 10763 44.9%    78.9/s
+29-May 10:58:35 test240     0:(32,32,32)     0.4 sec    1: 10762 44.9%     2.9/s
+29-May 10:58:35 test237     0:(32,32,32)     0.3 sec   10: 10752 45.0%    29.4/s
+29-May 10:58:35 test237     0:(32,32,32)     0.0 sec    1: 10751 45.0%   107.3/s
+29-May 10:58:35 test237     0:(32,32,32)     0.0 sec    1: 10750 45.0%   101.0/s
+29-May 10:58:35 test237     0:(32,32,32)     0.0 sec    1: 10749 45.0%   120.5/s
+29-May 10:58:36 test184     0:(32,32,32)     1.1 sec    7: 10742 45.0%     6.5/s
+29-May 10:58:40 test236     0:(32,32,32)     3.5 sec  117: 10625 45.6%    33.2/s
+[malloc debugging turned off]
+29-May 10:58:51 test84      0:(32,32,32)    11.0 sec   15: 10610 45.7%     1.4/s
+29-May 10:58:51 test84      0:(32,32,32)     0.4 sec   32: 10578 45.9%    82.2/s
+29-May 10:59:00 test84      2:(32,64,32)     9.5 sec    1: 10577 45.9%     0.1/s
+29-May 10:59:01 test84      2:(32,64,32)     0.4 sec     : 10577 45.9%
+29-May 10:59:01 test84      0:(32,32,32)     0.4 sec     : 10577 45.9%
+29-May 10:59:02 test84      0:(32,32,32)     0.5 sec    4: 10573 45.9%     8.7/s
+29-May 10:59:02 test84      2:(32,64,32)     0.4 sec    1: 10572 45.9%     2.2/s
+29-May 10:59:03 test84      2:(32,64,32)     0.5 sec     : 10572 45.9%
+29-May 10:59:21 test173     0:(32,32,32)    18.1 sec   20: 10552 46.0%     1.1/s
+29-May 10:59:21 test173     0:(32,32,32)     0.4 sec    4: 10548 46.0%    10.2/s
+29-May 10:59:34 test230     0:(32,32,32)    12.3 sec  250: 10298 47.3%    20.3/s
+29-May 10:59:35 test230     0:(32,32,32)     1.6 sec    2: 10296 47.3%     1.3/s
+29-May 10:59:48 test18      0:(32,32,32)    12.4 sec   91: 10205 47.8%     7.3/s
+29-May 10:59:50 test18      0:(32,32,32)     2.8 sec    7: 10198 47.8%     2.5/s
+29-May 11:00:33 testc7(0)   0:(32,32,32)    42.8 sec   12: 10186 47.9%     0.3/s
+29-May 11:00:39 testc7(0)   0:(32,32,32)     5.8 sec   11: 10175 47.9%     1.9/s
+29-May 11:01:06 test193     0:(32,32,32)    26.9 sec  200:  9975 49.0%     7.4/s
+29-May 11:01:09 test127     0:(32,32,32)     2.6 sec  929:  9046 53.7%   354.5/s
+29-May 11:01:13 test23      0:(32,32,32)     4.3 sec   61:  8985 54.0%    14.3/s
+29-May 11:01:19 test243     0:(32,32,32)     6.3 sec    7:  8978 54.1%     1.1/s
+29-May 11:02:24 test53      0:(32,32,32)    65.2 sec   38:  8940 54.3%     0.6/s
+29-May 11:02:29 test53      0:(32,32,32)     4.2 sec    5:  8935 54.3%     1.2/s
+29-May 11:02:41 test242     0:(32,32,32)    12.2 sec   45:  8890 54.5%     3.7/s
+29-May 11:02:52 test17      0:(32,32,32)    10.7 sec   32:  8858 54.7%     3.0/s
+29-May 11:03:02 test246     0:(32,32,32)     9.9 sec    4:  8854 54.7%     0.4/s
+29-May 11:03:07 test251b    0:(32,32,32)     5.6 sec   26:  8828 54.8%     4.7/s
+29-May 11:03:19 test251     0:(32,32,32)    11.6 sec  100:  8728 55.3%     8.6/s
+29-May 11:03:32 test152     0:(32,32,32)    13.4 sec  190:  8538 56.3%    14.2/s
+29-May 11:03:47 test152     0:(32,32,32)    15.1 sec  123:  8415 56.9%     8.1/s
+29-May 11:03:50 test160     0:(32,32,32)     2.6 sec   17:  8398 57.0%     6.6/s
+29-May 11:04:29 test232     0:(32,32,32)    38.7 sec   59:  8339 57.3%     1.5/s
+29-May 11:04:29 test232     0:(32,32,32)     0.5 sec    5:  8334 57.4%    10.8/s
+29-May 11:04:31 test142b    0:(32,32,32)     1.8 sec   10:  8324 57.4%     5.6/s
+29-May 11:04:31 test142b    0:(32,32,32)     0.0 sec    3:  8321 57.4%   198.0/s
+29-May 11:05:29 test142     0:(32,32,32)    58.2 sec  304:  8017 59.0%     5.2/s
+29-May 11:06:44 test227     0:(32,32,32)    74.9 sec   15:  8002 59.1%     0.2/s
+29-May 11:06:54 test292     0:(32,32,32)     9.8 sec    1:  8001 59.1%     0.1/s
+29-May 11:06:56 test192     0:(32,32,32)     1.2 sec    3:  7998 59.1%     2.5/s
+29-May 11:07:05 test181     0:(32,32,32)     9.1 sec    4:  7994 59.1%     0.4/s
+29-May 11:07:09 test181     0:(32,32,32)     4.8 sec   11:  7983 59.1%     2.3/s
+[malloc debugging turned on]
+29-May 11:07:28 test130     0:(32,32,32)    18.4 sec    8:  7975 59.2%     0.4/s
+29-May 11:07:28 test130     0:(32,32,32)     0.4 sec    6:  7969 59.2%    14.4/s
+29-May 11:07:29 test206     0:(32,32,32)     0.8 sec   86:  7883 59.7%   114.5/s
+29-May 11:07:34 test206     0:(32,32,32)     5.2 sec   12:  7871 59.7%     2.3/s
+29-May 11:07:51 test02      0:(32,32,32)    16.7 sec    3:  7868 59.7%     0.2/s
+29-May 11:08:47 test11      0:(32,32,32)    56.0 sec   17:  7851 59.8%     0.3/s
+29-May 11:08:53 test187     0:(32,32,32)     5.8 sec    5:  7846 59.8%     0.9/s
+29-May 11:08:55 test187     0:(32,32,32)     2.1 sec    1:  7845 59.9%     0.5/s
+29-May 11:08:58 test169     0:(32,32,32)     2.7 sec   32:  7813 60.0%    11.8/s
+29-May 11:09:02 test76      0:(32,32,32)     4.1 sec   14:  7799 60.1%     3.4/s
+29-May 11:09:11 test01      0:(32,32,32)     9.0 sec  597:  7202 63.1%    66.1/s
+29-May 11:09:17 test01      0:(32,32,32)     5.4 sec    4:  7198 63.2%     0.7/s
+29-May 11:09:21 test228     0:(32,32,32)     4.1 sec   25:  7173 63.3%     6.2/s
+29-May 11:09:26 test104     0:(32,32,32)     5.1 sec   35:  7138 63.5%     6.8/s
+29-May 11:10:33 test284     0:(32,32,32)    67.2 sec   68:  7070 63.8%     1.0/s
+29-May 11:10:35 test284     0:(32,32,32)     2.1 sec    4:  7066 63.8%     1.9/s
+29-May 11:10:56 test180     0:(32,32,32)    21.2 sec   21:  7045 63.9%     1.0/s
+29-May 11:11:03 test180     0:(32,32,32)     6.1 sec   91:  6954 64.4%    14.9/s
+29-May 11:11:12 test188     0:(32,32,32)     9.3 sec  169:  6785 65.3%    18.1/s
+29-May 11:11:43 test151b    0:(32,32,32)    31.2 sec   34:  6751 65.5%     1.1/s
+29-May 11:11:43 test151b    0:(32,32,32)     0.2 sec   18:  6733 65.5%    84.3/s
+29-May 11:12:08 test14b     0:(32,32,32)    24.7 sec   95:  6638 66.0%     3.8/s
+29-May 11:12:38 test14      0:(32,32,32)    29.3 sec  257:  6381 67.3%     8.8/s
+[malloc debugging turned off]
+29-May 11:13:11 test125     0:(32,32,32)    33.5 sec  319:  6062 69.0%     9.5/s
+29-May 11:14:30 test10      0:(32,32,32)    79.2 sec  702:  5360 72.6%     8.9/s
+29-May 11:15:11 test75b     0:(32,32,32)    40.3 sec  293:  5067 74.1%     7.3/s
+29-May 11:15:41 test74      0:(32,32,32)    30.2 sec 4101:   966 95.1%   135.8/s
+29-May 11:18:23 test234     0:(32,32,32)   162.3 sec  198:   768 96.1%     1.2/s
+[malloc debugging turned on]
+29-May 11:18:24 test154b    0:(32,32,32)     0.0 sec   12:   756 96.1%   475.8/s
+29-May 11:20:38 test154     0:(32,32,32)   134.0 sec  657:    99 99.5%     4.9/s
+29-May 11:21:48 test21b     0:(32,32,32)    69.7 sec   65:    34 99.8%     0.9/s
+29-May 11:26:12 test19b     0:(32,32,32)   263.9 sec   20:    14 99.9%     0.1/s
+29-May 11:26:14 test19b     0:(32,32,32)     1.6 sec    4:    10 99.9%     2.5/s
+[malloc debugging turned off]
+29-May 11:29:00 test19      0:(32,32,32)   166.0 sec    7:     3 99.9%     0.0/s
+29-May 11:29:01 test19      0:(32,32,32)     0.9 sec    2:     1 99.9%     2.2/s
+29-May 11:29:01 test280(0)  0:(32,32,32)     0.0 sec    1:   all  100%    22.2/s
+[malloc debugging turned off]
+29-May-2025 11:29:01 grbcov ending
diff --git a/GraphBLAS/cmake_modules/GraphBLAS_compiler_options.cmake b/GraphBLAS/cmake_modules/GraphBLAS_compiler_options.cmake
index 36cfe86f4..591d764a8 100644
--- a/GraphBLAS/cmake_modules/GraphBLAS_compiler_options.cmake
+++ b/GraphBLAS/cmake_modules/GraphBLAS_compiler_options.cmake
@@ -32,9 +32,6 @@ if ( "${CMAKE_C_COMPILER_ID}" STREQUAL "GNU" )
     if ( CMAKE_C_COMPILER_VERSION VERSION_LESS 4.9 )
         message ( FATAL_ERROR "gcc version must be at least 4.9" )
     endif ( )
-    if ( CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc|s390)" )
-        message ( FATAL_ERROR "Because of a bug in the gcc compiler itself, gcc cannot be used to compile GraphBLAS for the Power or s390 architectures; see GraphBLAS User Guide for details." )
-    endif ( )
 elseif ( "${CMAKE_C_COMPILER_ID}" STREQUAL "Intel" )
     # options for icc: also needs -std=c11
     set ( CMAKE_C_FLAGS  "${CMAKE_C_FLAGS} -diag-disable 10397,15552 " )
diff --git a/GraphBLAS/cmake_modules/GraphBLAS_version.cmake b/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
index 1a82b0e99..c938dbdb0 100644
--- a/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
+++ b/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
@@ -8,10 +8,10 @@
 #-------------------------------------------------------------------------------
 
 # version of SuiteSparse:GraphBLAS
-set ( GraphBLAS_DATE "June 1, 2025" )
+set ( GraphBLAS_DATE "June 3, 2025" )
 set ( GraphBLAS_VERSION_MAJOR 10 CACHE STRING "" FORCE )
 set ( GraphBLAS_VERSION_MINOR 1 CACHE STRING "" FORCE )
-set ( GraphBLAS_VERSION_SUB   0 CACHE STRING "" FORCE )
+set ( GraphBLAS_VERSION_SUB   1 CACHE STRING "" FORCE )
 
 # GraphBLAS C API Specification version, at graphblas.org
 set ( GraphBLAS_API_DATE "Dec 22, 2023" )
diff --git a/SuiteSparse_config/CMakeLists.txt b/SuiteSparse_config/CMakeLists.txt
index f1b20596f..483b551a1 100644
--- a/SuiteSparse_config/CMakeLists.txt
+++ b/SuiteSparse_config/CMakeLists.txt
@@ -395,3 +395,4 @@ endif ( )
 #-------------------------------------------------------------------------------
 
 include ( SuiteSparseReport )
+message ( STATUS "CMAKE_SYSTEM_PROCESSOR: ${CMAKE_SYSTEM_PROCESSOR}" )