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; /**
; *
; * File Name: armVCM4P2_Clip8_s.s
; * OpenMAX DL: v1.0.2
; * Revision: 9641
; * Date: Thursday, February 7, 2008
; *
; * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
; *
; *
; *
; * 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
|
