@/******************************************************************************
@ *
@ * Copyright (C) 2015 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.
@ *
@ *****************************************************************************
@ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
@*/
@/**
@******************************************************************************
@*
@* @brief :Evaluate best intra 16x16 mode (among VERT, HORZ and DC )
@* and do the prediction.
@*
@* @par Description
@* This function evaluates first three 16x16 modes and compute corresponding sad
@* and return the buffer predicted with best mode.
@*
@* @param[in] pu1_src
@* UWORD8 pointer to the source
@*
@** @param[in] pu1_ngbr_pels_i16
@* UWORD8 pointer to neighbouring pels
@*
@* @param[out] pu1_dst
@* UWORD8 pointer to the destination
@*
@* @param[in] src_strd
@* integer source stride
@*
@* @param[in] dst_strd
@* integer destination stride
@*
@* @param[in] u4_n_avblty
@* availability of neighbouring pixels
@*
@* @param[in] u4_intra_mode
@* Pointer to the variable in which best mode is returned
@*
@* @param[in] pu4_sadmin
@* Pointer to the variable in which minimum sad is returned
@*
@* @param[in] u4_valid_intra_modes
@* Says what all modes are valid
@*
@*
@* @return none
@*
@******************************************************************************
@*/
@
@void ih264e_evaluate_intra16x16_modes(UWORD8 *pu1_src,
@ UWORD8 *pu1_ngbr_pels_i16,
@ UWORD8 *pu1_dst,
@ UWORD32 src_strd,
@ UWORD32 dst_strd,
@ WORD32 u4_n_avblty,
@ UWORD32 *u4_intra_mode,
@ WORD32 *pu4_sadmin,
@ UWORD32 u4_valid_intra_modes)
@
.text
.p2align 2
.global ih264e_evaluate_intra16x16_modes_a9q
ih264e_evaluate_intra16x16_modes_a9q:
@r0 = pu1_src,
@r1 = pu1_ngbr_pels_i16,
@r2 = pu1_dst,
@r3 = src_strd,
@r4 = dst_strd,
@r5 = u4_n_avblty,
@r6 = u4_intra_mode,
@r7 = pu4_sadmin
stmfd sp!, {r4-r12, r14} @store register values to stack
ldr r5, [sp, #44]
vpush {d8-d15}
vld1.32 {q4}, [r1]!
sub r6, r1, #1
add r1, r1, #1
mov r10, #0
vld1.32 {q5}, [r1]!
mov r11, #0
mov r4, #0
@/* Left available ???? */
ands r7, r5, #01
movne r10, #1
@/* Top available ???? */
ands r8, r5, #04
lsl r9, r10, #3
movne r11, #1
lsl r12, r11, #3
adds r8, r9, r12
@/* None available :( */
moveq r4, #128
@/fINDING dc val*/
@----------------------
vaddl.u8 q15, d8, d9
vaddl.u8 q14, d10, d11
vadd.u16 q15, q14, q15
@ VLD1.32 {q2},[r0],r3;row 2
vadd.u16 d30, d31, d30
vpadd.u16 d30, d30
@ VLD1.32 {q3},[r0],r3 ;row 3
vpadd.u16 d30, d30
@---------------------
vmov.u16 r7, d30[0]
add r7, r7, r8
add r11, r11, #3
add r8, r10, r11
lsr r7, r8
add r7, r4, r7
vld1.32 {q0}, [r0], r3 @ source r0w 0
vdup.8 q15, r7 @dc val
@/* computing SADs for all three modes*/
ldrb r7, [r6]
vdup.8 q10, r7 @/HORIZONTAL VALUE ROW=0;
@/vertical row 0;
vabdl.u8 q8, d0, d10
vabdl.u8 q9, d1, d11
sub r6, r6, #1
@/HORZ row 0;
vabdl.u8 q13, d0, d20
vabdl.u8 q14, d1, d21
mov r1, #15
@/dc row 0;
vabdl.u8 q11, d0, d30
vabdl.u8 q12, d1, d31
loop:
vld1.32 {q1}, [r0], r3 @row i
@/dc row i;
vabal.u8 q11, d2, d30
ldrb r7, [r6]
vabal.u8 q12, d3, d31
@/vertical row i;
vabal.u8 q8, d2, d10
vdup.8 q10, r7 @/HORIZONTAL VALUE ROW=i;
sub r6, r6, #1
vabal.u8 q9, d3, d11
subs r1, r1, #1
@/HORZ row i;
vabal.u8 q13, d2, d20
vabal.u8 q14, d3, d21
bne loop
@------------------------------------------------------------------------------
vadd.i16 q9, q9, q8 @/VERT
vadd.i16 d18, d19, d18 @/VERT
vpaddl.u16 d18, d18 @/VERT
vadd.i16 q14, q13, q14 @/HORZ
vadd.i16 d28, d29, d28 @/HORZ
vpaddl.u32 d18, d18 @/VERT
vpaddl.u16 d28, d28 @/HORZ
vpaddl.u32 d28, d28 @/HORZ
vmov.u32 r8, d18[0] @ vert
vadd.i16 q12, q11, q12 @/DC
vmov.u32 r9, d28[0] @horz
mov r11, #1
vadd.i16 d24, d24, d25 @/DC
lsl r11 , #30
@-----------------------
ldr r0, [sp, #120] @ u4_valid_intra_modes
@--------------------------------------------
ands r7, r0, #01 @ vert mode valid????????????
moveq r8, r11
vpaddl.u16 d24, d24 @/DC
ands r6, r0, #02 @ horz mode valid????????????
moveq r9, r11
vpaddl.u32 d24, d24 @/DC
vmov.u32 r10, d24[0] @dc
@--------------------------------
ldr r4, [sp, #104] @r4 = dst_strd,
ldr r7, [sp, #116] @r7 = pu4_sadmin
@----------------------------------------------
ands r6, r0, #04 @ dc mode valid????????????
moveq r10, r11
@---------------------------
ldr r6, [sp, #112] @ R6 =MODE
@--------------------------
cmp r8, r9
bgt not_vert
cmp r8, r10
bgt do_dc
@/----------------------
@DO VERTICAL PREDICTION
str r8 , [r7] @MIN SAD
mov r8, #0
str r8 , [r6] @ MODE
vmov q15, q5
b do_dc_vert
@-----------------------------
not_vert:
cmp r9, r10
bgt do_dc
@/----------------------
@DO HORIZONTAL
vdup.8 q5, d9[7] @0
str r9 , [r7] @MIN SAD
vdup.8 q6, d9[6] @1
mov r9, #1
vdup.8 q7, d9[5] @2
vst1.32 {d10, d11} , [r2], r4 @0
vdup.8 q8, d9[4] @3
str r9 , [r6] @ MODE
vdup.8 q9, d9[3] @4
vst1.32 {d12, d13} , [r2], r4 @1
vdup.8 q10, d9[2] @5
vst1.32 {d14, d15} , [r2], r4 @2
vdup.8 q11, d9[1] @6
vst1.32 {d16, d17} , [r2], r4 @3
vdup.8 q12, d9[0] @7
vst1.32 {d18, d19} , [r2], r4 @4
vdup.8 q13, d8[7] @8
vst1.32 {d20, d21} , [r2], r4 @5
vdup.8 q14, d8[6] @9
vst1.32 {d22, d23} , [r2], r4 @6
vdup.8 q15, d8[5] @10
vst1.32 {d24, d25} , [r2], r4 @7
vdup.8 q1, d8[4] @11
vst1.32 {d26, d27} , [r2], r4 @8
vdup.8 q2, d8[3] @12
vst1.32 {d28, d29} , [r2], r4 @9
vdup.8 q3, d8[2] @13
vst1.32 {d30, d31}, [r2], r4 @10
vdup.8 q5, d8[1] @14
vst1.32 {d2, d3} , [r2], r4 @11
vdup.8 q6, d8[0] @15
vst1.32 {d4, d5} , [r2], r4 @12
vst1.32 {d6, d7} , [r2], r4 @13
vst1.32 {d10, d11} , [r2], r4 @14
vst1.32 {d12, d13} , [r2], r4 @15
b end_func
@/-----------------------------
do_dc: @/---------------------------------
@DO DC
str r10 , [r7] @MIN SAD
mov r10, #2
str r10 , [r6] @ MODE
do_dc_vert:
vst1.32 {d30, d31}, [r2], r4 @0
vst1.32 {d30, d31}, [r2], r4 @1
vst1.32 {d30, d31}, [r2], r4 @2
vst1.32 {d30, d31}, [r2], r4 @3
vst1.32 {d30, d31}, [r2], r4 @4
vst1.32 {d30, d31}, [r2], r4 @5
vst1.32 {d30, d31}, [r2], r4 @6
vst1.32 {d30, d31}, [r2], r4 @7
vst1.32 {d30, d31}, [r2], r4 @8
vst1.32 {d30, d31}, [r2], r4 @9
vst1.32 {d30, d31}, [r2], r4 @10
vst1.32 {d30, d31}, [r2], r4 @11
vst1.32 {d30, d31}, [r2], r4 @12
vst1.32 {d30, d31}, [r2], r4 @13
vst1.32 {d30, d31}, [r2], r4 @14
vst1.32 {d30, d31}, [r2], r4 @15
@/------------------
end_func:
vpop {d8-d15}
ldmfd sp!, {r4-r12, pc} @Restoring registers from stack