Merge pull request #3875 from martin-frbg/issue3874

Make SVE-enabled ARM64 targets in DYNAMIC_ARCH builds depend on a relatively recent compiler

Makefile.system

@@ -284,8 +284,10 @@ GETARCH_FLAGS += -DHAVE_GAS=$(HAVE_GAS)
 # Generating Makefile.conf and config.h
 DUMMY := $(shell $(MAKE) -C $(TOPDIR) -f Makefile.prebuild CC="$(CC)" FC="$(FC)" HOSTCC="$(HOSTCC)" HOST_CFLAGS="$(GETARCH_FLAGS)" CFLAGS="$(CFLAGS)" BINARY=$(BINARY) USE_OPENMP=$(USE_OPENMP) DYNAMIC_ARCH=$(DYNAMIC_ARCH) TARGET_CORE=$(TARGET_CORE) ONLY_CBLAS=$(ONLY_CBLAS) TARGET=$(TARGET) all)
 
+endif
+
 ifndef TARGET_CORE
-include $(TOPDIR)/Makefile.conf
+-include $(TOPDIR)/Makefile.conf
 else
 HAVE_NEON=
 HAVE_VFP=
@@ -306,7 +308,6 @@ HAVE_FMA3=
 include $(TOPDIR)/Makefile_kernel.conf
 endif
 
-endif
 
 ifndef NUM_PARALLEL
 NUM_PARALLEL = 1
@@ -664,8 +665,10 @@ DYNAMIC_CORE += CORTEXA57
 DYNAMIC_CORE += CORTEXA72
 DYNAMIC_CORE += CORTEXA73
 DYNAMIC_CORE += NEOVERSEN1
+ifneq ($(NO_SVE), 1)
 DYNAMIC_CORE += NEOVERSEV1
 DYNAMIC_CORE += NEOVERSEN2
+endif
 DYNAMIC_CORE += CORTEXA55
 DYNAMIC_CORE += FALKOR
 DYNAMIC_CORE += THUNDERX
@@ -1382,6 +1385,10 @@ ifeq ($(NO_AVX512), 1)
 CCOMMON_OPT	+= -DNO_AVX512
 endif
 
+ifeq ($(NO_SVE), 1)
+CCOMMON_OPT     += -DNO_SVE
+endif
+
 ifdef SMP
 CCOMMON_OPT	+= -DSMP_SERVER
 

c_check

@@ -240,6 +240,21 @@ if [ "$architecture" = "riscv64" ]; then
     rm -rf "$tmpd"
 fi
 
+no_sve=0
+if [ "$architecture" = "arm64" ]; then
+    tmpd=`mktemp -d`
+    tmpf="$tmpd/a.c"
+    printf "#include <arm_sve.h>\n\n int main(void){}\n">> "$tmpf"
+    args=" -march=armv8-a+sve -c -o $tmpf.o $tmpf"
+    no_sve=0
+    {
+        $compiler_name $flags $args >/dev/null 2>&1
+    } || {
+        no_sve=1
+    }
+    rm -rf "$tmpd"
+fi
+
 c11_atomics=0
 case "$data" in
     *HAVE_C11*)
@@ -379,6 +394,7 @@ done
         printf "HAVE_MSA=1\n"
         printf "MSA_FLAGS=%s\n" "$msa_flags"
     }
+    [ "$no_sve" -eq 1 ] && printf "NO_SVE=1\n"
     [ "$no_rv64gv" -eq 1 ] && printf "NO_RV64GV=1\n"
     [ "$no_avx512" -eq 1 ] && printf "NO_AVX512=1\n"
     [ "$no_avx2" -eq 1 ] && printf "NO_AVX2=1\n"

cmake/arch.cmake

@@ -44,9 +44,12 @@ endif ()
 
 if (DYNAMIC_ARCH)
   if (ARM64)
-	  set(DYNAMIC_CORE ARMV8 CORTEXA53 CORTEXA55 CORTEXA57 CORTEXA72 CORTEXA73 FALKOR THUNDERX THUNDERX2T99 TSV110 EMAG8180 NEOVERSEN1 NEOVERSEV1 NEOVERSEN2 THUNDERX3T110)
+	  set(DYNAMIC_CORE ARMV8 CORTEXA53 CORTEXA55 CORTEXA57 CORTEXA72 CORTEXA73 FALKOR THUNDERX THUNDERX2T99 TSV110 EMAG8180 NEOVERSEN1 THUNDERX3T110)
+    if (${CMAKE_C_COMPILER_VERSION} VERSION_GREATER 9.99)
+          set(DYNAMIC_CORE "${DYNAMIC_CORE} NEOVERSEV1 NEOVERSEN2")
+    endif ()
     if (DYNAMIC_LIST)
-	    set(DYNAMIC_CORE ARMV8 ${DYNAMIC_LIST})
+	  set(DYNAMIC_CORE ARMV8 ${DYNAMIC_LIST})
     endif ()
   endif ()
   

driver/others/dynamic_arm64.c

@@ -125,8 +125,13 @@ extern gotoblas_t  gotoblas_THUNDERX2T99;
 extern gotoblas_t  gotoblas_TSV110;
 extern gotoblas_t  gotoblas_EMAG8180;
 extern gotoblas_t  gotoblas_NEOVERSEN1;
+#ifndef NO_SVE
 extern gotoblas_t  gotoblas_NEOVERSEV1;
 extern gotoblas_t  gotoblas_NEOVERSEN2;
+#else
+#define gotoblas_NEOVERSEV1 gotoblas_ARMV8
+#define gotoblas_NEOVERSEN2 gotoblas_ARMV8
+#endif
 extern gotoblas_t  gotoblas_THUNDERX3T110;
 extern gotoblas_t  gotoblas_CORTEXA55;
 #endif
@@ -237,7 +242,7 @@ static gotoblas_t *get_coretype(void) {
         p = (char *) NULL ;
 	infile = fopen("/sys/devices/system/cpu/cpu0/regs/identification/midr_el1","r");
 	if (!infile) return NULL;
-	fgets(buffer, sizeof(buffer), infile);
+	(void)fgets(buffer, sizeof(buffer), infile);
 	midr_el1=strtoul(buffer,NULL,16);
 	fclose(infile);
 #else
@@ -274,10 +279,12 @@ static gotoblas_t *get_coretype(void) {
           return &gotoblas_CORTEXA73;
         case 0xd0c: // Neoverse N1
           return &gotoblas_NEOVERSEN1;
+#ifndef NO_SVE
         case 0xd49:
           return &gotoblas_NEOVERSEN2;
 	case 0xd40:
 	  return &gotoblas_NEOVERSEV1;
+#endif
 	case 0xd05: // Cortex A55
 	  return &gotoblas_CORTEXA55;
       }