xref: /frameworks/av/media/libstagefright/codecs/on2/h264dec/source/arm_neon_asm/h264bsdFillRow7.s

;
; Copyright (C) 2009 The Android Open Source Project
;
; 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.
;

    REQUIRE8
    PRESERVE8

    AREA    |.text|, CODE

    EXPORT h264bsdFillRow7

; Input / output registers

ref     RN 0
fill    RN 1
left    RN 2
tmp2    RN 2
center  RN 3
right   RN 4
tmp1    RN 5

; -- NEON registers --

qTmp0   QN  Q0.U8
qTmp1   QN  Q1.U8
dTmp0   DN  D0.U8
dTmp1   DN  D1.U8
dTmp2   DN  D2.U8
dTmp3   DN  D3.U8


;/*------------------------------------------------------------------------------
;
;    Function: h264bsdFillRow7
;
;        Functional description:
;
;        Inputs:
;
;        Outputs:
;
;        Returns:
;
;------------------------------------------------------------------------------*/

h264bsdFillRow7
        PUSH     {r4-r6,lr}
        CMP      left, #0
        LDR      right, [sp,#0x10]
        BEQ      switch_center
        LDRB     tmp1, [ref,#0]

loop_left
        SUBS     left, left, #1
        STRB     tmp1, [fill], #1
        BNE      loop_left

switch_center
        ASR      tmp2,center,#2
        CMP      tmp2,#9
        ADDCC    pc,pc,tmp2,LSL #2
        B        loop_center
        B        loop_center
        B        case_1
        B        case_2
        B        case_3
        B        case_4
        B        case_5
        B        case_6
        B        case_7
        B        case_8
;case_8
;        LDR      tmp2, [ref], #4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4
;case_7
;        LDR      tmp2, [ref], #4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4
;case_6
;        LDR      tmp2, [ref], #4
;        SUB      center, center, #4
;        STR      tmp2, [fill],#4
;case_5
;        LDR      tmp2, [ref], #4
;        SUB      center, center, #4
;        STR      tmp2, [fill],#4
;case_4
;        LDR      tmp2, [ref],#4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4
;case_3
;        LDR      tmp2, [ref],#4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4
;case_2
;        LDR      tmp2, [ref],#4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4
;case_1
;        LDR      tmp2, [ref],#4
;        SUB      center, center, #4
;        STR      tmp2, [fill], #4

case_8
        VLD1    {qTmp0, qTmp1}, [ref]!
        SUB     center, center, #32
        VST1    qTmp0, [fill]!
        VST1    qTmp1, [fill]!
        B       loop_center
case_7
        VLD1    {dTmp0,dTmp1,dTmp2}, [ref]!
        SUB     center, center, #28
        LDR     tmp2, [ref], #4
        VST1    {dTmp0,dTmp1,dTmp2}, [fill]!
        STR     tmp2, [fill],#4
        B       loop_center
case_6
        VLD1    {dTmp0,dTmp1,dTmp2}, [ref]!
        SUB     center, center, #24
        VST1    {dTmp0,dTmp1,dTmp2}, [fill]!
        B       loop_center
case_5
        VLD1    qTmp0, [ref]!
        SUB     center, center, #20
        LDR     tmp2, [ref], #4
        VST1    qTmp0, [fill]!
        STR     tmp2, [fill],#4
        B       loop_center
case_4
        VLD1    qTmp0, [ref]!
        SUB     center, center, #16
        VST1    qTmp0, [fill]!
        B       loop_center
case_3
        VLD1    dTmp0, [ref]!
        SUB     center, center, #12
        LDR     tmp2, [ref], #4
        VST1    dTmp0, [fill]!
        STR     tmp2, [fill],#4
        B       loop_center
case_2
        LDR      tmp2, [ref],#4
        SUB      center, center, #4
        STR      tmp2, [fill], #4
case_1
        LDR      tmp2, [ref],#4
        SUB      center, center, #4
        STR      tmp2, [fill], #4

loop_center
        CMP      center, #0
        LDRBNE   tmp2, [ref], #1
        SUBNE    center, center, #1
        STRBNE   tmp2, [fill], #1
        BNE      loop_center
        CMP      right,#0
        POPEQ    {r4-r6,pc}
        LDRB     tmp2, [ref,#-1]

loop_right
        STRB     tmp2, [fill], #1
        SUBS     right, right, #1
        BNE      loop_right

        POP      {r4-r6,pc}
        END