1 files changed, 124 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/mpi/aarch64/mpih-mul3.S b/comm/third_party/libgcrypt/mpi/aarch64/mpih-mul3.S
new file mode 100644
index 0000000000..5a40b354c2
--- /dev/null
+++ b/comm/third_party/libgcrypt/mpi/aarch64/mpih-mul3.S
@@ -0,0 +1,124 @@
+/* ARM mul_3 -- Multiply a limb vector with a limb and subtract the result
+ *              from a second limb vector.
+ *
+ *      Copyright (C) 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "sysdep.h"
+#include "asm-syntax.h"
+#include "asm-common-aarch64.h"
+
+/*******************
+ * mpi_limb_t
+ * _gcry_mpih_submul_1( mpi_ptr_t res_ptr,	x0
+ *		     mpi_ptr_t s1_ptr,		x1
+ *		     mpi_size_t s1_size,	w2
+ *		     mpi_limb_t s2_limb)	x3
+ */
+
+.text
+
+.globl _gcry_mpih_submul_1
+ELF(.type  _gcry_mpih_submul_1,%function)
+_gcry_mpih_submul_1:
+	CFI_STARTPROC()
+	and	w5, w2, #3;
+	mov	x7, xzr;
+	cbz	w5, .Large_loop;
+
+	subs	xzr, xzr, xzr;
+
+.Loop:
+	ldr	x4, [x1], #8;
+	cinc	x7, x7, cc;
+	ldr	x5, [x0];
+	sub	w2, w2, #1;
+
+	mul	x6, x4, x3;
+	subs	x5, x5, x7;
+	umulh	x4, x4, x3;
+	and	w10, w2, #3;
+
+	cset	x7, cc;
+	subs	x5, x5, x6;
+	add	x7, x7, x4;
+	str	x5, [x0], #8;
+
+	cbz	w2, .Loop_end;
+	cbnz	w10, .Loop;
+
+	cinc	x7, x7, cc;
+
+.Large_loop:
+	ldp	x4, x8, [x1], #16;
+	sub	w2, w2, #4;
+	ldp	x5, x9, [x0];
+
+	mul	x6, x4, x3;
+	subs	x5, x5, x7;
+	umulh	x4, x4, x3;
+
+	cset	x7, cc;
+	subs	x5, x5, x6;
+	mul	x6, x8, x3;
+	add	x7, x7, x4;
+	str	x5, [x0], #8;
+	cinc	x7, x7, cc;
+
+	umulh	x8, x8, x3;
+
+	subs	x9, x9, x7;
+	cset	x7, cc;
+	subs	x9, x9, x6;
+	ldp	x4, x10, [x1], #16;
+	str	x9, [x0], #8;
+	add	x7, x7, x8;
+	ldp	x5, x9, [x0];
+	cinc	x7, x7, cc;
+
+	mul	x6, x4, x3;
+	subs	x5, x5, x7;
+	umulh	x4, x4, x3;
+
+	cset	x7, cc;
+	subs	x5, x5, x6;
+	mul	x6, x10, x3;
+	add	x7, x7, x4;
+	str	x5, [x0], #8;
+	cinc	x7, x7, cc;
+
+	umulh	x10, x10, x3;
+
+	subs	x9, x9, x7;
+	cset	x7, cc;
+	subs	x9, x9, x6;
+	add	x7, x7, x10;
+	str	x9, [x0], #8;
+	cinc	x7, x7, cc;
+
+	cbnz	w2, .Large_loop;
+
+	mov	x0, x7;
+	ret;
+
+.Loop_end:
+	cinc	x0, x7, cc;
+	ret;
+	CFI_ENDPROC()
+ELF(.size _gcry_mpih_submul_1,.-_gcry_mpih_submul_1;)