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359 lines
13 KiB
ArmAsm
359 lines
13 KiB
ArmAsm
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@/******************************************************************************
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@ *
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@ * Copyright (C) 2015 The Android Open Source Project
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@ *
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@ * Licensed under the Apache License, Version 2.0 (the "License");
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@ * you may not use this file except in compliance with the License.
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@ * You may obtain a copy of the License at:
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@ *
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@ * http://www.apache.org/licenses/LICENSE-2.0
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@ *
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@ * Unless required by applicable law or agreed to in writing, software
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@ * distributed under the License is distributed on an "AS IS" BASIS,
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@ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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@ * See the License for the specific language governing permissions and
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@ * limitations under the License.
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@ *
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@ *****************************************************************************
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@ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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@*/
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@**
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@******************************************************************************
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@* @file
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@* ih264_default_weighted_pred_a9q.s
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@*
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@* @brief
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@* Contains function definitions for default weighted prediction.
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@*
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@* @author
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@* Kaushik Senthoor R
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@*
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@* @par List of Functions:
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@*
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@* - ih264_default_weighted_pred_luma_a9q()
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@* - ih264_default_weighted_pred_chroma_a9q()
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@*
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@* @remarks
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@* None
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@*
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@*******************************************************************************
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@*
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@*******************************************************************************
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@* @function
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@* ih264_default_weighted_pred_luma_a9q()
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@*
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@* @brief
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@* This routine performs the default weighted prediction as described in sec
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@* 8.4.2.3.1 titled "Default weighted sample prediction process" for luma.
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@*
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@* @par Description:
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@* This function gets two ht x wd blocks, calculates their rounded-average and
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@* stores it in the destination block.
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@*
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@* @param[in] pu1_src1:
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@* UWORD8 Pointer to the buffer containing the first input block.
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@*
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@* @param[in] pu1_src2:
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@* UWORD8 Pointer to the buffer containing the second input block.
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@*
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@* @param[out] pu1_dst
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@* UWORD8 pointer to the destination where the output block is stored.
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@*
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@* @param[in] src_strd1
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@* Stride of the first input buffer
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@*
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@* @param[in] src_strd2
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@* Stride of the second input buffer
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@*
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@* @param[in] dst_strd
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@* Stride of the destination buffer
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@*
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@* @param[in] ht
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@* integer height of the array
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@*
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@* @param[in] wd
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@* integer width of the array
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@*
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@* @returns
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@* None
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@*
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@* @remarks
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@* (ht,wd) can be (4,4), (4,8), (8,4), (8,8), (8,16), (16,8) or (16,16).
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@*
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@*******************************************************************************
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@*
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@void ih264_default_weighted_pred_luma_a9q(UWORD8 *pu1_src1,
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@ UWORD8 *pu1_src2,
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@ UWORD8 *pu1_dst,
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@ WORD32 src_strd1,
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@ WORD32 src_strd2,
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@ WORD32 dst_strd,
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@ WORD32 ht,
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@ WORD32 wd)
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@
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@**************Variables Vs Registers*****************************************
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@ r0 => pu1_src1
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@ r1 => pu1_src2
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@ r2 => pu1_dst
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@ r3 => src_strd1
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@ [sp] => src_strd2 (r4)
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@ [sp+4] => dst_strd (r5)
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@ [sp+8] => ht (r6)
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@ [sp+12] => wd (r7)
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@
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.text
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.p2align 2
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.global ih264_default_weighted_pred_luma_a9q
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ih264_default_weighted_pred_luma_a9q:
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stmfd sp!, {r4-r7, r14} @stack stores the values of the arguments
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ldr r7, [sp, #32] @Load wd
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ldr r4, [sp, #20] @Load src_strd2
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ldr r5, [sp, #24] @Load dst_strd
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cmp r7, #16
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ldr r6, [sp, #28] @Load ht
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vpush {d8-d15}
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beq loop_16 @branch if wd is 16
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cmp r7, #8
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beq loop_8 @branch if wd is 8
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loop_4: @each iteration processes four rows
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vld1.32 d0[0], [r0], r3 @load row 1 in source 1
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vld1.32 d0[1], [r0], r3 @load row 2 in source 1
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vld1.32 d2[0], [r1], r4 @load row 1 in source 2
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vld1.32 d2[1], [r1], r4 @load row 2 in source 2
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vld1.32 d1[0], [r0], r3 @load row 3 in source 1
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vld1.32 d1[1], [r0], r3 @load row 4 in source 1
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vrhadd.u8 d0, d0, d2
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vld1.32 d3[0], [r1], r4 @load row 3 in source 2
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vld1.32 d3[1], [r1], r4 @load row 4 in source 2
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subs r6, r6, #4 @decrement ht by 4
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vst1.32 d0[0], [r2], r5 @load row 1 in destination
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vst1.32 d0[1], [r2], r5 @load row 2 in destination
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vrhadd.u8 d1, d1, d3
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vst1.32 d1[0], [r2], r5 @load row 3 in destination
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vst1.32 d1[1], [r2], r5 @load row 4 in destination
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bgt loop_4 @if greater than 0 repeat the loop again
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b end_loops
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loop_8: @each iteration processes four rows
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vld1.8 d0, [r0], r3 @load row 1 in source 1
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vld1.8 d4, [r1], r4 @load row 1 in source 2
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vld1.8 d1, [r0], r3 @load row 2 in source 1
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vld1.8 d5, [r1], r4 @load row 2 in source 2
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vld1.8 d2, [r0], r3 @load row 3 in source 1
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vrhadd.u8 q0, q0, q2
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vld1.8 d6, [r1], r4 @load row 3 in source 2
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vld1.8 d3, [r0], r3 @load row 4 in source 1
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vrhadd.u8 d2, d2, d6
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vld1.8 d7, [r1], r4 @load row 4 in source 2
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subs r6, r6, #4 @decrement ht by 4
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vst1.8 d0, [r2], r5 @load row 1 in destination
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vrhadd.u8 d3, d3, d7
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vst1.8 d1, [r2], r5 @load row 2 in destination
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vst1.8 d2, [r2], r5 @load row 3 in destination
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vst1.8 d3, [r2], r5 @load row 4 in destination
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bgt loop_8 @if greater than 0 repeat the loop again
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b end_loops
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loop_16: @each iteration processes eight rows
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vld1.8 {q0}, [r0], r3 @load row 1 in source 1
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vld1.8 {q8}, [r1], r4 @load row 1 in source 2
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vld1.8 {q1}, [r0], r3 @load row 2 in source 1
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vld1.8 {q9}, [r1], r4 @load row 2 in source 2
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vrhadd.u8 q0, q0, q8
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vld1.8 {q2}, [r0], r3 @load row 3 in source 1
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vld1.8 {q10}, [r1], r4 @load row 3 in source 2
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vrhadd.u8 q1, q1, q9
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vld1.8 {q3}, [r0], r3 @load row 4 in source 1
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vld1.8 {q11}, [r1], r4 @load row 4 in source 2
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vrhadd.u8 q2, q2, q10
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vld1.8 {q4}, [r0], r3 @load row 5 in source 1
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vld1.8 {q12}, [r1], r4 @load row 5 in source 2
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vrhadd.u8 q3, q3, q11
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vld1.8 {q5}, [r0], r3 @load row 6 in source 1
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vld1.8 {q13}, [r1], r4 @load row 6 in source 2
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vrhadd.u8 q4, q4, q12
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vld1.8 {q6}, [r0], r3 @load row 7 in source 1
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vld1.8 {q14}, [r1], r4 @load row 7 in source 2
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vrhadd.u8 q5, q5, q13
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vld1.8 {q7}, [r0], r3 @load row 8 in source 1
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vld1.8 {q15}, [r1], r4 @load row 8 in source 2
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vrhadd.u8 q6, q6, q14
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vst1.8 {q0}, [r2], r5 @load row 1 in destination
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vst1.8 {q1}, [r2], r5 @load row 2 in destination
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vrhadd.u8 q7, q7, q15
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vst1.8 {q2}, [r2], r5 @load row 3 in destination
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vst1.8 {q3}, [r2], r5 @load row 4 in destination
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subs r6, r6, #8 @decrement ht by 8
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vst1.8 {q4}, [r2], r5 @load row 5 in destination
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vst1.8 {q5}, [r2], r5 @load row 6 in destination
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vst1.8 {q6}, [r2], r5 @load row 7 in destination
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vst1.8 {q7}, [r2], r5 @load row 8 in destination
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bgt loop_16 @if greater than 0 repeat the loop again
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end_loops:
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vpop {d8-d15}
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ldmfd sp!, {r4-r7, r15} @Reload the registers from sp
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@*******************************************************************************
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@* @function
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@* ih264_default_weighted_pred_chroma_a9q()
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@*
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@* @brief
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@* This routine performs the default weighted prediction as described in sec
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@* 8.4.2.3.1 titled "Default weighted sample prediction process" for chroma.
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@*
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@* @par Description:
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@* This function gets two ht x wd blocks, calculates their rounded-average and
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@* stores it in the destination block for U and V.
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@*
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@* @param[in] pu1_src1:
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@* UWORD8 Pointer to the buffer containing the first input block.
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@*
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@* @param[in] pu1_src2:
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@* UWORD8 Pointer to the buffer containing the second input block.
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@*
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@* @param[out] pu1_dst
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@* UWORD8 pointer to the destination where the output block is stored.
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@*
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@* @param[in] src_strd1
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@* Stride of the first input buffer
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@*
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@* @param[in] src_strd2
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@* Stride of the second input buffer
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@*
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@* @param[in] dst_strd
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@* Stride of the destination buffer
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@*
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@* @param[in] ht
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@* integer height of the array
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@*
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@* @param[in] wd
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@* integer width of the array
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@*
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@* @returns
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@* None
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@*
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@* @remarks
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@* (ht,wd) can be (2,2), (2,4), (4,2), (4,4), (4,8), (8,4) or (8,8).
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@*
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@*******************************************************************************
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@*
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@void ih264_default_weighted_pred_chroma_a9q(UWORD8 *pu1_src1,
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@ UWORD8 *pu1_src2,
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@ UWORD8 *pu1_dst,
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@ WORD32 src_strd1,
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@ WORD32 src_strd2,
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@ WORD32 dst_strd,
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@ WORD32 ht,
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@ WORD32 wd)
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@
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@**************Variables Vs Registers*****************************************
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@ r0 => pu1_src1
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@ r1 => pu1_src2
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@ r2 => pu1_dst
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@ r3 => src_strd1
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@ [sp] => src_strd2 (r4)
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@ [sp+4] => dst_strd (r5)
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@ [sp+8] => ht (r6)
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@ [sp+12] => wd (r7)
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@
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.global ih264_default_weighted_pred_chroma_a9q
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ih264_default_weighted_pred_chroma_a9q:
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stmfd sp!, {r4-r7, r14} @stack stores the values of the arguments
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ldr r7, [sp, #32] @Load wd
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ldr r4, [sp, #20] @Load src_strd2
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ldr r5, [sp, #24] @Load dst_strd
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cmp r7, #8
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ldr r6, [sp, #28] @Load ht
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vpush {d8-d15}
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beq loop_8_uv @branch if wd is 8
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cmp r7, #4
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beq loop_4_uv @branch if wd is 4
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loop_2_uv: @each iteration processes two rows
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vld1.32 d0[0], [r0], r3 @load row 1 in source 1
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vld1.32 d0[1], [r0], r3 @load row 2 in source 1
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vld1.32 d1[0], [r1], r4 @load row 1 in source 2
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vld1.32 d1[1], [r1], r4 @load row 2 in source 2
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vrhadd.u8 d0, d0, d1
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subs r6, r6, #2 @decrement ht by 2
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vst1.32 d0[0], [r2], r5 @load row 1 in destination
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vst1.32 d0[1], [r2], r5 @load row 2 in destination
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bgt loop_2_uv @if greater than 0 repeat the loop again
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b end_loops_uv
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loop_4_uv: @each iteration processes two rows
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vld1.8 d0, [r0], r3 @load row 1 in source 1
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vld1.8 d2, [r1], r4 @load row 1 in source 2
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vld1.8 d1, [r0], r3 @load row 2 in source 1
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vrhadd.u8 d0, d0, d2
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vld1.8 d3, [r1], r4 @load row 2 in source 2
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vrhadd.u8 d1, d1, d3
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vst1.8 d0, [r2], r5 @load row 1 in destination
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subs r6, r6, #2 @decrement ht by 2
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vst1.8 d1, [r2], r5 @load row 2 in destination
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bgt loop_4_uv @if greater than 0 repeat the loop again
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b end_loops_uv
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loop_8_uv: @each iteration processes four rows
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||
|
|
vld1.8 {q0}, [r0], r3 @load row 1 in source 1
|
||
|
|
vld1.8 {q4}, [r1], r4 @load row 1 in source 2
|
||
|
|
vld1.8 {q1}, [r0], r3 @load row 2 in source 1
|
||
|
|
vrhadd.u8 q0, q0, q4
|
||
|
|
vld1.8 {q5}, [r1], r4 @load row 2 in source 2
|
||
|
|
vld1.8 {q2}, [r0], r3 @load row 3 in source 1
|
||
|
|
vrhadd.u8 q1, q1, q5
|
||
|
|
vld1.8 {q6}, [r1], r4 @load row 3 in source 2
|
||
|
|
vld1.8 {q3}, [r0], r3 @load row 4 in source 1
|
||
|
|
vrhadd.u8 q2, q2, q6
|
||
|
|
vld1.8 {q7}, [r1], r4 @load row 4 in source 2
|
||
|
|
|
||
|
|
vst1.8 {q0}, [r2], r5 @load row 1 in destination
|
||
|
|
vrhadd.u8 q3, q3, q7
|
||
|
|
vst1.8 {q1}, [r2], r5 @load row 2 in destination
|
||
|
|
subs r6, r6, #4 @decrement ht by 4
|
||
|
|
vst1.8 {q2}, [r2], r5 @load row 3 in destination
|
||
|
|
vst1.8 {q3}, [r2], r5 @load row 4 in destination
|
||
|
|
|
||
|
|
bgt loop_8_uv @if greater than 0 repeat the loop again
|
||
|
|
|
||
|
|
end_loops_uv:
|
||
|
|
|
||
|
|
vpop {d8-d15}
|
||
|
|
ldmfd sp!, {r4-r7, r15} @Reload the registers from sp
|
||
|
|
|
||
|
|
|