From: Niels Möller <nisse@lysator.liu.se>
Date: Tue, 8 Dec 2020 16:51:46 +0000 (+0100)
Subject: Recognize arm64 in configure
X-Git-Tag: nettle_3.8_release_20220602~141^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ebf9ae834d73b9374f6ea45f1e939921682747fe;p=thirdparty%2Fnettle.git

Recognize arm64 in configure
---

diff --git a/Makefile.in b/Makefile.in
index cfbc45bb..a87e0a9e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -615,7 +615,7 @@ distdir: $(DISTFILES)
 	done
 	set -e; for d in sparc32 sparc64 x86 \
 		x86_64 x86_64/aesni x86_64/sha_ni x86_64/fat \
-		arm arm/neon arm/v6 arm/fat \
+		arm arm/neon arm/v6 arm/fat arm64 \
 		powerpc64 powerpc64/p7 powerpc64/p8 powerpc64/fat ; do \
 	  mkdir "$(distdir)/$$d" ; \
 	  find "$(srcdir)/$$d" -maxdepth 1 '(' -name '*.asm' -o -name '*.m4' -o -name README ')' \
diff --git a/configure.ac b/configure.ac
index 763df3b5..e76f9375 100644
--- a/configure.ac
+++ b/configure.ac
@@ -344,6 +344,18 @@ case "$host_cpu" in
       ABI=64
     ])
     ;;
+  aarch64)
+    AC_TRY_COMPILE([
+#if defined(__aarch64__)
+#error 64-bit powerpc
+#endif
+    ], [], [
+      ABI=32
+    ], [
+      ABI=64
+    ])
+    ;;
+
 esac
 
 if test "x$ABI" != xstandard ; then
@@ -459,6 +471,17 @@ if test "x$enable_assembler" = xyes ; then
 	fi
       fi
       ;;
+    aarch64*)
+      if test "$ABI" = 64 ; then
+	asm_path=arm64
+      else
+	# As far as I understand, Neon instructions are unlikely to be
+	# missing. It may be omitted "only for implementations
+	# targeting specialized markets", to quote the Armv8 reference
+	# manual.
+	asm_path="arm/neon arm/v6 arm"
+      fi
+      ;;
     *powerpc64*)
       if test "$ABI" = 64 ; then
 	GMP_ASM_POWERPC_R_REGISTERS