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;//
;// Copyright (C) 2007-2008 ARM Limited
;//
;// Licensed under the Apache License, Version 2.0 (the "License");
;// you may not use this file except in compliance with the License.
;// You may obtain a copy of the License at
;//
;// http://www.apache.org/licenses/LICENSE-2.0
;//
;// Unless required by applicable law or agreed to in writing, software
;// distributed under the License is distributed on an "AS IS" BASIS,
;// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;// See the License for the specific language governing permissions and
;// limitations under the License.
;//
; /**
; *
; * File Name: armVCM4P2_Clip8_s.s
; * OpenMAX DL: v1.0.2
; * Revision: 9641
; * Date: Thursday, February 7, 2008
; *
; *
; *
; *
; * Description:
; * Contains module for Clipping 16 bit value to [0,255] Range
; */
INCLUDE omxtypes_s.h
INCLUDE armCOMM_s.h
M_VARIANTS ARM1136JS
IF ARM1136JS
;//Input Arguments
pSrc RN 0
pDst RN 1
step RN 2
;// Local variables
x0 RN 3
x1 RN 4
x2 RN 5
x3 RN 6
Count RN 14
M_START armVCM4P2_Clip8,r6
MOV Count,#8
loop
LDMIA pSrc!,{x0, x1}
SUBS Count,Count, #1 ;// count down
LDMIA pSrc!,{x2, x3}
USAT16 x0, #8, x0 ;// clip two samples to [0,255]
USAT16 x1, #8, x1 ;// clip two samples to [0,255]
STRB x0, [pDst]
MOV x0, x0, LSR #16
STRB x0, [pDst,#1]
STRB x1, [pDst,#2]
MOV x1, x1, LSR #16
STRB x1, [pDst,#3]
USAT16 x2, #8, x2 ;// clip two samples to [0,255]
USAT16 x3, #8, x3 ;// clip two samples to [0,255]
STRB x2, [pDst,#4]
MOV x2, x2, LSR #16
STRB x2, [pDst,#5]
STRB x3, [pDst,#6]
MOV x3, x3, LSR #16
STRB x3, [pDst,#7]
ADD pDst,pDst,step ;// Increment pDst by step value
BGT loop ;// Continue loop until Count reaches 64
M_END
ENDIF
END
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