Added runtime selection of 'power' config family. (#718)

Details:
- Created a 'power' umbrella configuration family, which, when targeted 
  at configure-time, will build both 'power9' and 'power10' subconfigs. 
  (With this feature, a BLIS shared library could be compiled on a 
  power9 system and run on power10 and vice-versa. Unoptimised code
  will execute if it is linked and run on any other generic system.)
- This new configuration family will only work with gcc, since that is
  the only compiler supported by both power9 and power10 subconfigs in 
  BLIS.
- Documented power9 and power10 as supported microarchitectures in the
  docs/HardwareSupport.md document.

config/power/bli_family_power.h

@@ -0,0 +1,41 @@
+/*
+
+   BLIS
+   An object-based framework for developing high-performance BLAS-like
+   libraries.
+
+   Copyright (C) 2014, The University of Texas at Austin
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+    - Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    - Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    - Neither the name(s) of the copyright holder(s) nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+//#ifndef BLIS_FAMILY_H
+//#define BLIS_FAMILY_H
+
+
+
+//#endif
+

config/power/make_defs.mk

@@ -0,0 +1,82 @@
+#
+#
+#  BLIS
+#  An object-based framework for developing high-performance BLAS-like
+#  libraries.
+#
+#  Copyright (C) 2014, The University of Texas at Austin
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are
+#  met:
+#   - Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#   - Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   - Neither the name(s) of the copyright holder(s) nor the names of its
+#     contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#
+
+
+# Declare the name of the current configuration and add it to the
+# running list of configurations included by common.mk.
+THIS_CONFIG    := power
+#CONFIGS_INCL   += $(THIS_CONFIG)
+
+#
+# --- Determine the C compiler and related flags ---
+#
+
+# NOTE: The build system will append these variables with various
+# general-purpose/configuration-agnostic flags in common.mk. You
+# may specify additional flags here as needed.
+CPPROCFLAGS    :=
+CMISCFLAGS     :=
+CPICFLAGS      :=
+CWARNFLAGS     :=
+
+ifneq ($(DEBUG_TYPE),off)
+CDBGFLAGS      := -g
+endif
+
+ifeq ($(DEBUG_TYPE),noopt)
+COPTFLAGS      := -O0
+else
+COPTFLAGS      := -O2
+endif
+
+# Flags specific to optimized kernels.
+CKOPTFLAGS     := $(COPTFLAGS) -O3
+CKVECFLAGS     :=
+
+# Flags specific to reference kernels.
+CROPTFLAGS     := $(CKOPTFLAGS)
+ifeq ($(CC_VENDOR),gcc)
+CRVECFLAGS     := $(CKVECFLAGS) -funsafe-math-optimizations -ffp-contract=fast
+else
+ifeq ($(CC_VENDOR),clang)
+CRVECFLAGS     := $(CKVECFLAGS) -funsafe-math-optimizations -ffp-contract=fast
+else
+CRVECFLAGS     := $(CKVECFLAGS)
+endif
+endif
+
+# Store all of the variables here to new variables containing the
+# configuration name.
+$(eval $(call store-make-defs,$(THIS_CONFIG)))
+

config_registry

@@ -14,6 +14,7 @@ amd64_legacy:   excavator steamroller piledriver bulldozer generic
 amd64:          zen3 zen2 zen generic
 arm64:          armsve firestorm thunderx2 cortexa57 cortexa53 generic
 arm32:          cortexa15 cortexa9 generic
+power:		power10 power9 generic
 
 # Intel architectures.
 skx:         skx/skx/haswell/zen

docs/HardwareSupport.md

@@ -39,6 +39,8 @@ A few remarks / reminders:
 | ARMv8.1 A64FX (SVE)                  | `a64fx`                |  `d`   |            |
 | IBM Blue Gene/Q (QPX int)            | `bgq`                  |  `d`   |            |
 | IBM Power7 (QPX int)                 | `power7`               |  `d`   |            |
+| IBM Power9                           | `power9`               | `sdcz` |            |
+| IBM Power10                          | `power10`              | `sdcz` |            |
 | template (C99)                       | `template`             | `sdcz` | `sdcz`     |
 
 ## Level-1f kernels

frame/base/bli_arch.c

@@ -175,7 +175,8 @@ arch_t bli_arch_query_id_impl( void )
 		    defined BLIS_FAMILY_AMD64   || \
 		    defined BLIS_FAMILY_X86_64  || \
 		    defined BLIS_FAMILY_ARM64   || \
-		    defined BLIS_FAMILY_ARM32
+		    defined BLIS_FAMILY_ARM32   || \
+		    defined BLIS_FAMILY_POWER
 		id = bli_cpuid_query_id();
 		#endif
 

frame/include/bli_arch_config.h

@@ -237,7 +237,12 @@ CNTX_INIT_PROTS( generic )
 #include "bli_family_cortexa9.h"
 #endif
 
-// -- IBM Power --
+// -- IBM Power families --
+#ifdef BLIS_FAMILY_POWER
+#include "bli_family_power.h"
+#endif
+
+// -- IBM Power architectures --
 
 #ifdef BLIS_FAMILY_POWER10
 #include "bli_family_power10.h"