add generated boringssl files

libraries/libfc/libraries/boringssl/boringssl/apple-aarch64/crypto/fipsmodule/bn-armv8-apple.S

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+// This file is generated from a similarly-named Perl script in the BoringSSL
+// source tree. Do not edit by hand.
+
+#include <openssl/asm_base.h>
+
+#if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_AARCH64) && defined(__APPLE__)
+#include <openssl/arm_arch.h>
+
+.text
+
+// BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
+//                       size_t num);
+
+.globl	_bn_add_words
+.private_extern	_bn_add_words
+.align	4
+_bn_add_words:
+	AARCH64_VALID_CALL_TARGET
+	# Clear the carry flag.
+	cmn	xzr, xzr
+
+	# aarch64 can load two registers at a time, so we do two loop iterations at
+	# at a time. Split x3 = 2 * x8 + x3. This allows loop
+	# operations to use CBNZ without clobbering the carry flag.
+	lsr	x8, x3, #1
+	and	x3, x3, #1
+
+	cbz	x8, Ladd_tail
+Ladd_loop:
+	ldp	x4, x5, [x1], #16
+	ldp	x6, x7, [x2], #16
+	sub	x8, x8, #1
+	adcs	x4, x4, x6
+	adcs	x5, x5, x7
+	stp	x4, x5, [x0], #16
+	cbnz	x8, Ladd_loop
+
+Ladd_tail:
+	cbz	x3, Ladd_exit
+	ldr	x4, [x1], #8
+	ldr	x6, [x2], #8
+	adcs	x4, x4, x6
+	str	x4, [x0], #8
+
+Ladd_exit:
+	cset	x0, cs
+	ret
+
+
+// BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
+//                       size_t num);
+
+.globl	_bn_sub_words
+.private_extern	_bn_sub_words
+.align	4
+_bn_sub_words:
+	AARCH64_VALID_CALL_TARGET
+	# Set the carry flag. Arm's borrow bit is flipped from the carry flag,
+	# so we want C = 1 here.
+	cmp	xzr, xzr
+
+	# aarch64 can load two registers at a time, so we do two loop iterations at
+	# at a time. Split x3 = 2 * x8 + x3. This allows loop
+	# operations to use CBNZ without clobbering the carry flag.
+	lsr	x8, x3, #1
+	and	x3, x3, #1
+
+	cbz	x8, Lsub_tail
+Lsub_loop:
+	ldp	x4, x5, [x1], #16
+	ldp	x6, x7, [x2], #16
+	sub	x8, x8, #1
+	sbcs	x4, x4, x6
+	sbcs	x5, x5, x7
+	stp	x4, x5, [x0], #16
+	cbnz	x8, Lsub_loop
+
+Lsub_tail:
+	cbz	x3, Lsub_exit
+	ldr	x4, [x1], #8
+	ldr	x6, [x2], #8
+	sbcs	x4, x4, x6
+	str	x4, [x0], #8
+
+Lsub_exit:
+	cset	x0, cc
+	ret
+
+#endif  // !OPENSSL_NO_ASM && defined(OPENSSL_AARCH64) && defined(__APPLE__)