1 files changed, 95 insertions, 0 deletions
diff --git a/src/isa-l/igzip/aarch64/igzip_deflate_hash_aarch64.S b/src/isa-l/igzip/aarch64/igzip_deflate_hash_aarch64.S
new file mode 100644
index 000000000..40251dab4
--- /dev/null
+++ b/src/isa-l/igzip/aarch64/igzip_deflate_hash_aarch64.S
@@ -0,0 +1,95 @@
+/**********************************************************************
+  Copyright(c) 2019 Arm Corporation All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in
+      the documentation and/or other materials provided with the
+      distribution.
+    * Neither the name of Arm Corporation nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**********************************************************************/
+	.arch armv8-a+crc
+	.text
+	.align	2
+#include "lz0a_const_aarch64.h"
+#include "data_struct_aarch64.h"
+#include "huffman_aarch64.h"
+#include "bitbuf2_aarch64.h"
+#include "stdmac_aarch64.h"
+/*
+declare Macros
+*/
+
+.macro	declare_generic_reg name:req,reg:req,default:req
+	\name		.req	\default\reg
+	w_\name		.req	w\reg
+	x_\name		.req	x\reg
+.endm
+
+
+
+	.global	isal_deflate_hash_aarch64
+	.type	isal_deflate_hash_aarch64, %function
+/*
+	void isal_deflate_hash_aarch64(uint16_t * hash_table, uint32_t hash_mask,
+			    uint32_t current_index, uint8_t * dict, uint32_t dict_len)
+*/
+	declare_generic_reg	hash_table,	0,x
+	declare_generic_reg	hash_mask,	1,w
+	declare_generic_reg	current_index,	2,w
+	declare_generic_reg	dict,		3,x
+	declare_generic_reg	dict_len,	4,w
+
+	declare_generic_reg 	next_in		3,x
+	declare_generic_reg 	end_in		6,x
+	declare_generic_reg 	ind		5,w
+	declare_generic_reg 	hash		2,w
+	declare_generic_reg 	literal		2,w
+#define SHORTEST_MATCH #4
+
+isal_deflate_hash_aarch64:
+	sub     ind, current_index, dict_len
+	and	ind,ind,0xffff
+
+
+        uxtw    x_dict_len, dict_len
+        sub     x_dict_len, x_dict_len, SHORTEST_MATCH
+        add     end_in, dict, x_dict_len
+
+
+
+        cmp     next_in, end_in
+        bcs     exit_func
+
+        mov     w7, 0
+loop_start:
+        ldr     literal, [next_in]
+        add     next_in, next_in, 1
+        cmp     next_in, end_in
+        crc32cw hash, w7, literal
+        and     hash, hash, hash_mask
+        strh    ind, [hash_table, x_hash, lsl 1]
+        add	ind,ind,1
+        bne     loop_start
+exit_func:
+
+	ret
+	.size	isal_deflate_hash_aarch64, .-isal_deflate_hash_aarch64