Import ceph 15.2.8

[ceph.git] / ceph / src / isa-l / igzip / aarch64 / igzip_deflate_hash_aarch64.S

diff --git a/ceph/src/isa-l/igzip/aarch64/igzip_deflate_hash_aarch64.S b/ceph/src/isa-l/igzip/aarch64/igzip_deflate_hash_aarch64.S
new file mode 100644 (file)
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--- /dev/null
+++ b/ceph/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