Add ecp_nistz256-ppc64 module.

Reviewed-by: NRich Salz <rsalz@openssl.org>

Configurations/00-base-templates.conf

@@ -275,7 +275,7 @@
 	inherit_from	=> [ "parisc11_asm" ],
 	perlasm_scheme	=> "64",
     },
-    ppc64_asm => {
+    ppc32_asm => {
 	template	=> 1,
 	cpuid_asm_src   => "ppccpuid.s ppccap.c",
 	bn_asm_src      => "bn-ppc.s ppc-mont.s ppc64-mont.s",
@@ -285,8 +285,10 @@
 	chacha_asm_src	=> "chacha-ppc.s",
 	poly1305_asm_src=> "poly1305-ppc.s poly1305-ppcfp.s",
     },
-    ppc32_asm => {
-	inherit_from	=> [ "ppc64_asm" ],
-	template	=> 1
+    ppc64_asm => {
+	inherit_from	=> [ "ppc32_asm" ],
+	template	=> 1,
+	ec_asm_src	=> "ecp_nistz256.c ecp_nistz256-ppc64.s",
+
     },
 );

crypto/ec/build.info

@@ -21,6 +21,7 @@ GENERATE[ecp_nistz256-armv4.S]=asm/ecp_nistz256-armv4.pl $(PERLASM_SCHEME)
 INCLUDE[ecp_nistz256-armv4.o]=..
 GENERATE[ecp_nistz256-armv8.S]=asm/ecp_nistz256-armv8.pl $(PERLASM_SCHEME)
 INCLUDE[ecp_nistz256-armv8.o]=..
+GENERATE[ecp_nistz256-ppc64.s]=asm/ecp_nistz256-ppc64.pl $(PERLASM_SCHEME)
 
 BEGINRAW[Makefile]
 {- $builddir -}/ecp_nistz256-%.S:	{- $sourcedir -}/asm/ecp_nistz256-%.pl

crypto/ppccap.c

@@ -131,6 +131,30 @@ int poly1305_init(void *ctx, const unsigned char key[16], void *func[2])
 }
 #endif
 
+#ifdef ECP_NISTZ256_ASM
+void ecp_nistz256_mul_mont(unsigned long res[4], const unsigned long a[4],
+                           const unsigned long b[4]);
+
+void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4]);
+void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4])
+{
+    static const unsigned long RR[] = { 0x0000000000000003U,
+                                        0xfffffffbffffffffU,
+                                        0xfffffffffffffffeU,
+                                        0x00000004fffffffdU };
+
+    ecp_nistz256_mul_mont(res, in, RR);
+}
+
+void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4]);
+void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4])
+{
+    static const unsigned long one[] = { 1, 0, 0, 0 };
+
+    ecp_nistz256_mul_mont(res, in, one);
+}
+#endif
+
 static sigjmp_buf ill_jmp;
 static void ill_handler(int sig)
 {