Use s2n-bignum assembly implementations for libcrypto bignum on amd64.

This switches the core bignum assembly implementations from x86_64-gcc.c to
s2n-bignum for amd64.

ok miod@ tb@

1 files changed, 79 insertions, 1 deletions

diff --git a/src/lib/libcrypto/bn/arch/amd64/bn_arch.c b/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
index 240575955c..aedefc76e2 100644
--- a/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
+++ b/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bn_arch.c,v 1.1 2023/01/21 17:29:56 jsing Exp $ */
+/*      $OpenBSD: bn_arch.c,v 1.2 2023/01/29 14:00:41 jsing Exp $ */
 /*
  * Copyright (c) 2023 Joel Sing <jsing@openbsd.org>
  *
@@ -21,6 +21,58 @@
 #include "bn_local.h"
 #include "s2n_bignum.h"
 
+#ifdef HAVE_BN_ADD_WORDS
+BN_ULONG
+bn_add_words(BN_ULONG *rd, const BN_ULONG *ad, const BN_ULONG *bd, int n)
+{
+        return bignum_add(n, (uint64_t *)rd, n, (uint64_t *)ad, n,
+            (uint64_t *)bd);
+}
+#endif
+
+#ifdef HAVE_BN_SUB_WORDS
+BN_ULONG
+bn_sub_words(BN_ULONG *rd, const BN_ULONG *ad, const BN_ULONG *bd, int n)
+{
+        return bignum_sub(n, (uint64_t *)rd, n, (uint64_t *)ad, n,
+            (uint64_t *)bd);
+}
+#endif
+
+#ifdef HAVE_BN_MUL_ADD_WORDS
+BN_ULONG
+bn_mul_add_words(BN_ULONG *rd, const BN_ULONG *ad, int num, BN_ULONG w)
+{
+        return bignum_cmadd(num, (uint64_t *)rd, w, num, (uint64_t *)ad);
+}
+#endif
+
+#ifdef HAVE_BN_MUL_WORDS
+BN_ULONG
+bn_mul_words(BN_ULONG *rd, const BN_ULONG *ad, int num, BN_ULONG w)
+{
+        return bignum_cmul(num, (uint64_t *)rd, w, num, (uint64_t *)ad);
+}
+#endif
+
+#ifdef HAVE_BN_MUL_COMBA4
+void
+bn_mul_comba4(BN_ULONG *rd, BN_ULONG *ad, BN_ULONG *bd)
+{
+        /* XXX - consider using non-alt on CPUs that have the ADX extension. */
+        bignum_mul_4_8_alt((uint64_t *)rd, (uint64_t *)ad, (uint64_t *)bd);
+}
+#endif
+
+#ifdef HAVE_BN_MUL_COMBA8
+void
+bn_mul_comba8(BN_ULONG *rd, BN_ULONG *ad, BN_ULONG *bd)
+{
+        /* XXX - consider using non-alt on CPUs that have the ADX extension. */
+        bignum_mul_8_16_alt((uint64_t *)rd, (uint64_t *)ad, (uint64_t *)bd);
+}
+#endif
+
 #ifdef HAVE_BN_SQR
 int
 bn_sqr(BIGNUM *r, const BIGNUM *a, int rn, BN_CTX *ctx)
@@ -30,3 +82,29 @@ bn_sqr(BIGNUM *r, const BIGNUM *a, int rn, BN_CTX *ctx)
         return 1;
 }
 #endif
+
+#ifdef HAVE_BN_SQR_COMBA4
+void
+bn_sqr_comba4(BN_ULONG *rd, const BN_ULONG *ad)
+{
+        /* XXX - consider using non-alt on CPUs that have the ADX extension. */
+        bignum_sqr_4_8_alt((uint64_t *)rd, (uint64_t *)ad);
+}
+#endif
+
+#ifdef HAVE_BN_SQR_COMBA8
+void
+bn_sqr_comba8(BN_ULONG *rd, const BN_ULONG *ad)
+{
+        /* XXX - consider using non-alt on CPUs that have the ADX extension. */
+        bignum_sqr_8_16_alt((uint64_t *)rd, (uint64_t *)ad);
+}
+#endif
+
+#ifdef HAVE_BN_SQR_WORDS
+void
+bn_sqr_words(BN_ULONG *rd, const BN_ULONG *ad, int num)
+{
+        bignum_sqr(num, (uint64_t *)rd, num, (uint64_t *)ad);
+}
+#endif