660f49b02d
Include fast DEFLATE compatable compression functions. Signed-off-by: Greg Tucker <greg.b.tucker@intel.com>
82 lines
2.6 KiB
NASM
82 lines
2.6 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
; Copyright(c) 2011-2016 Intel 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 Intel 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.
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
%include "reg_sizes.asm"
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;
|
|
;; detect_repeated_char buf, size
|
|
%ifidn __OUTPUT_FORMAT__, elf64
|
|
%define buf rdi
|
|
%define size rsi
|
|
%elifidn __OUTPUT_FORMAT__, win64
|
|
%define buf rcx
|
|
%define size rdx
|
|
%endif ; output formats
|
|
|
|
%define tmp r10
|
|
|
|
global detect_repeated_char
|
|
detect_repeated_char:
|
|
|
|
;; replicate the 1st byte to 8 bytes
|
|
xor tmp, tmp
|
|
xor rax, rax
|
|
|
|
mov al, [buf]
|
|
mov ah, al
|
|
mov tmp %+ w, ax
|
|
shl tmp, 16
|
|
or eax, tmp %+ d
|
|
mov tmp %+ d, eax
|
|
shl tmp, 32
|
|
or rax, tmp
|
|
|
|
;; detect the 8K input
|
|
lea tmp, [buf + size]
|
|
_loop:
|
|
cmp rax, [buf]
|
|
jne _fail
|
|
add buf, 8
|
|
cmp buf, tmp
|
|
jb _loop
|
|
shr rax, 56
|
|
jmp _end
|
|
|
|
_fail:
|
|
mov rax, -1
|
|
|
|
_end:
|
|
ret
|
|
|
|
%undef buf
|
|
%undef size
|
|
%undef tmp
|