@/****************************************************************************** @ * @ * 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 @*/ @** @****************************************************************************** @* @file @* ih264_weighted_pred_a9q.s @* @* @brief @* Contains function definitions for weighted prediction. @* @* @author @* Kaushik Senthoor R @* @* @par List of Functions: @* @* - ih264_weighted_pred_luma_a9q() @* - ih264_weighted_pred_chroma_a9q() @* @* @remarks @* None @* @******************************************************************************* @* @******************************************************************************* @* @function @* ih264_weighted_pred_luma_a9q() @* @* @brief @* This routine performs the default weighted prediction as described in sec @* 8.4.2.3.2 titled "Weighted sample prediction process" for luma. @* @* @par Description: @* This function gets a ht x wd block, calculates the weighted sample, rounds @* off, adds offset and stores it in the destination block. @* @* @param[in] pu1_src: @* UWORD8 Pointer to the buffer containing the input block. @* @* @param[out] pu1_dst @* UWORD8 pointer to the destination where the output block is stored. @* @* @param[in] src_strd @* Stride of the input buffer @* @* @param[in] dst_strd @* Stride of the destination buffer @* @* @param[in] log_wd @* number of bits to be rounded off @* @* @param[in] wt @* weight for the weighted prediction @* @* @param[in] ofst @* offset used after rounding off @* @* @param[in] ht @* integer height of the array @* @* @param[in] wd @* integer width of the array @* @* @returns @* None @* @* @remarks @* (ht,wd) can be (4,4), (4,8), (8,4), (8,8), (8,16), (16,8) or (16,16). @* @******************************************************************************* @* @void ih264_weighted_pred_luma_a9q(UWORD8 *pu1_src, @ UWORD8 *pu1_dst, @ WORD32 src_strd, @ WORD32 dst_strd, @ WORD32 log_wd, @ WORD32 wt, @ WORD32 ofst, @ WORD32 ht, @ WORD32 wd) @ @**************Variables Vs Registers***************************************** @ r0 => pu1_src @ r1 => pu1_dst @ r2 => src_strd @ r3 => dst_strd @ [sp] => log_wd (r4) @ [sp+4] => wt (r5) @ [sp+8] => ofst (r6) @ [sp+12] => ht (r7) @ [sp+16] => wd (r8) @ .text .p2align 2 .global ih264_weighted_pred_luma_a9q ih264_weighted_pred_luma_a9q: stmfd sp!, {r4-r9, r14} @stack stores the values of the arguments ldr r5, [sp, #32] @Load wt ldr r4, [sp, #28] @Load log_wd in r4 ldr r6, [sp, #36] @Load ofst ldr r7, [sp, #40] @Load ht ldr r8, [sp, #44] @Load wd vpush {d8-d15} vdup.16 d2, r5 @D2 = wt (16-bit) rsb r9, r4, #0 @r9 = -log_wd vdup.8 d3, r6 @D3 = ofst (8-bit) cmp r8, #16 @check if wd is 16 vdup.16 q0, r9 @Q0 = -log_wd (16-bit) beq loop_16 @branch if wd is 16 cmp r8, #8 @check if wd is 8 beq loop_8 @branch if wd is 8 loop_4: @each iteration processes four rows vld1.32 d4[0], [r0], r2 @load row 1 in source vld1.32 d4[1], [r0], r2 @load row 2 in source vld1.32 d6[0], [r0], r2 @load row 3 in source vld1.32 d6[1], [r0], r2 @load row 4 in source vmovl.u8 q2, d4 @converting rows 1,2 to 16-bit vmovl.u8 q3, d6 @converting rows 3,4 to 16-bit vmul.s16 q2, q2, d2[0] @weight mult. for rows 1,2 vmul.s16 q3, q3, d2[0] @weight mult. for rows 3,4 subs r7, r7, #4 @decrement ht by 4 vrshl.s16 q2, q2, q0 @rounds off the weighted samples from rows 1,2 vrshl.s16 q3, q3, q0 @rounds off the weighted samples from rows 3,4 vaddw.s8 q2, q2, d3 @adding offset for rows 1,2 vaddw.s8 q3, q3, d3 @adding offset for rows 3,4 vqmovun.s16 d4, q2 @saturating rows 1,2 to unsigned 8-bit vqmovun.s16 d6, q3 @saturating rows 3,4 to unsigned 8-bit vst1.32 d4[0], [r1], r3 @store row 1 in destination vst1.32 d4[1], [r1], r3 @store row 2 in destination vst1.32 d6[0], [r1], r3 @store row 3 in destination vst1.32 d6[1], [r1], r3 @store row 4 in destination bgt loop_4 @if greater than 0 repeat the loop again b end_loops loop_8: @each iteration processes four rows vld1.8 d4, [r0], r2 @load row 1 in source vld1.8 d6, [r0], r2 @load row 2 in source vld1.8 d8, [r0], r2 @load row 3 in source vmovl.u8 q2, d4 @converting row 1 to 16-bit vld1.8 d10, [r0], r2 @load row 4 in source vmovl.u8 q3, d6 @converting row 2 to 16-bit vmovl.u8 q4, d8 @converting row 3 to 16-bit vmul.s16 q2, q2, d2[0] @weight mult. for row 1 vmovl.u8 q5, d10 @converting row 4 to 16-bit vmul.s16 q3, q3, d2[0] @weight mult. for row 2 vmul.s16 q4, q4, d2[0] @weight mult. for row 3 vmul.s16 q5, q5, d2[0] @weight mult. for row 4 vrshl.s16 q2, q2, q0 @rounds off the weighted samples from row 1 vrshl.s16 q3, q3, q0 @rounds off the weighted samples from row 2 vrshl.s16 q4, q4, q0 @rounds off the weighted samples from row 3 vaddw.s8 q2, q2, d3 @adding offset for row 1 vrshl.s16 q5, q5, q0 @rounds off the weighted samples from row 4 vaddw.s8 q3, q3, d3 @adding offset for row 2 vaddw.s8 q4, q4, d3 @adding offset for row 3 vqmovun.s16 d4, q2 @saturating row 1 to unsigned 8-bit vaddw.s8 q5, q5, d3 @adding offset for row 4 vqmovun.s16 d6, q3 @saturating row 2 to unsigned 8-bit vqmovun.s16 d8, q4 @saturating row 3 to unsigned 8-bit vqmovun.s16 d10, q5 @saturating row 4 to unsigned 8-bit vst1.8 d4, [r1], r3 @store row 1 in destination vst1.8 d6, [r1], r3 @store row 2 in destination subs r7, r7, #4 @decrement ht by 4 vst1.8 d8, [r1], r3 @store row 3 in destination vst1.8 d10, [r1], r3 @store row 4 in destination bgt loop_8 @if greater than 0 repeat the loop again b end_loops loop_16: @each iteration processes two rows vld1.8 {q2}, [r0], r2 @load row 1 in source vld1.8 {q3}, [r0], r2 @load row 2 in source vmovl.u8 q6, d4 @converting row 1L to 16-bit vld1.8 {q4}, [r0], r2 @load row 3 in source vmovl.u8 q7, d5 @converting row 1H to 16-bit vld1.8 {q5}, [r0], r2 @load row 4 in source vmovl.u8 q8, d6 @converting row 2L to 16-bit vmul.s16 q6, q6, d2[0] @weight mult. for row 1L vmovl.u8 q9, d7 @converting row 2H to 16-bit vmul.s16 q7, q7, d2[0] @weight mult. for row 1H vmovl.u8 q10, d8 @converting row 3L to 16-bit vmul.s16 q8, q8, d2[0] @weight mult. for row 2L vmovl.u8 q11, d9 @converting row 3H to 16-bit vmul.s16 q9, q9, d2[0] @weight mult. for row 2H vmovl.u8 q12, d10 @converting row 4L to 16-bit vmul.s16 q10, q10, d2[0] @weight mult. for row 3L vmovl.u8 q13, d11 @converting row 4H to 16-bit vmul.s16 q11, q11, d2[0] @weight mult. for row 3H vmul.s16 q12, q12, d2[0] @weight mult. for row 4L vrshl.s16 q6, q6, q0 @rounds off the weighted samples from row 1L vmul.s16 q13, q13, d2[0] @weight mult. for row 4H vrshl.s16 q7, q7, q0 @rounds off the weighted samples from row 1H vrshl.s16 q8, q8, q0 @rounds off the weighted samples from row 2L vaddw.s8 q6, q6, d3 @adding offset for row 1L vrshl.s16 q9, q9, q0 @rounds off the weighted samples from row 2H vaddw.s8 q7, q7, d3 @adding offset for row 1H vqmovun.s16 d4, q6 @saturating row 1L to unsigned 8-bit vrshl.s16 q10, q10, q0 @rounds off the weighted samples from row 3L vaddw.s8 q8, q8, d3 @adding offset for row 2L vqmovun.s16 d5, q7 @saturating row 1H to unsigned 8-bit vrshl.s16 q11, q11, q0 @rounds off the weighted samples from row 3H vaddw.s8 q9, q9, d3 @adding offset for row 2H vqmovun.s16 d6, q8 @saturating row 2L to unsigned 8-bit vrshl.s16 q12, q12, q0 @rounds off the weighted samples from row 4L vaddw.s8 q10, q10, d3 @adding offset for row 3L vqmovun.s16 d7, q9 @saturating row 2H to unsigned 8-bit vrshl.s16 q13, q13, q0 @rounds off the weighted samples from row 4H vaddw.s8 q11, q11, d3 @adding offset for row 3H vqmovun.s16 d8, q10 @saturating row 3L to unsigned 8-bit vaddw.s8 q12, q12, d3 @adding offset for row 4L vqmovun.s16 d9, q11 @saturating row 3H to unsigned 8-bit vaddw.s8 q13, q13, d3 @adding offset for row 4H vqmovun.s16 d10, q12 @saturating row 4L to unsigned 8-bit vst1.8 {q2}, [r1], r3 @store row 1 in destination vqmovun.s16 d11, q13 @saturating row 4H to unsigned 8-bit vst1.8 {q3}, [r1], r3 @store row 2 in destination subs r7, r7, #4 @decrement ht by 4 vst1.8 {q4}, [r1], r3 @store row 3 in destination vst1.8 {q5}, [r1], r3 @store row 4 in destination bgt loop_16 @if greater than 0 repeat the loop again end_loops: vpop {d8-d15} ldmfd sp!, {r4-r9, r15} @Reload the registers from sp @******************************************************************************* @* @function @* ih264_weighted_pred_chroma_a9q() @* @* @brief @* This routine performs the default weighted prediction as described in sec @* 8.4.2.3.2 titled "Weighted sample prediction process" for chroma. @* @* @par Description: @* This function gets a ht x wd block, calculates the weighted sample, rounds @* off, adds offset and stores it in the destination block for U and V. @* @* @param[in] pu1_src: @* UWORD8 Pointer to the buffer containing the input block. @* @* @param[out] pu1_dst @* UWORD8 pointer to the destination where the output block is stored. @* @* @param[in] src_strd @* Stride of the input buffer @* @* @param[in] dst_strd @* Stride of the destination buffer @* @* @param[in] log_wd @* number of bits to be rounded off @* @* @param[in] wt @* weights for the weighted prediction for U and V @* @* @param[in] ofst @* offsets used after rounding off for U and V @* @* @param[in] ht @* integer height of the array @* @* @param[in] wd @* integer width of the array @* @* @returns @* None @* @* @remarks @* (ht,wd) can be (2,2), (2,4), (4,2), (4,4), (4,8), (8,4) or (8,8). @* @******************************************************************************* @* @void ih264_weighted_pred_chroma_a9q(UWORD8 *pu1_src, @ UWORD8 *pu1_dst, @ WORD32 src_strd, @ WORD32 dst_strd, @ WORD32 log_wd, @ WORD32 wt, @ WORD32 ofst, @ WORD32 ht, @ WORD32 wd) @ @**************Variables Vs Registers***************************************** @ r0 => pu1_src @ r1 => pu1_dst @ r2 => src_strd @ r3 => dst_strd @ [sp] => log_wd (r4) @ [sp+4] => wt (r5) @ [sp+8] => ofst (r6) @ [sp+12] => ht (r7) @ [sp+16] => wd (r8) @ .global ih264_weighted_pred_chroma_a9q ih264_weighted_pred_chroma_a9q: stmfd sp!, {r4-r9, r14} @stack stores the values of the arguments ldr r4, [sp, #28] @Load log_wd in r4 ldr r5, [sp, #32] @Load wt = {wt_u (16-bit), wt_v (16-bit)} ldr r6, [sp, #36] @Load ofst = {ofst_u (8-bit), ofst_v (8-bit)} ldr r8, [sp, #44] @Load wd rsb r9, r4, #0 @r9 = -log_wd vdup.32 q1, r5 @Q1 = {wt_u (16-bit), wt_v (16-bit)} ldr r7, [sp, #40] @Load ht vpush {d8-d15} vdup.16 d4, r6 @D4 = {ofst_u (8-bit), ofst_v (8-bit)} cmp r8, #8 @check if wd is 8 vdup.16 q0, r9 @Q0 = -log_wd (16-bit) beq loop_8_uv @branch if wd is 8 cmp r8, #4 @check if ws is 4 beq loop_4_uv @branch if wd is 4 loop_2_uv: @each iteration processes two rows vld1.32 d6[0], [r0], r2 @load row 1 in source vld1.32 d6[1], [r0], r2 @load row 2 in source vmovl.u8 q3, d6 @converting rows 1,2 to 16-bit vmul.s16 q3, q3, q1 @weight mult. for rows 1,2 vrshl.s16 q3, q3, q0 @rounds off the weighted samples from rows 1,2 vaddw.s8 q3, q3, d4 @adding offset for rows 1,2 vqmovun.s16 d6, q3 @saturating rows 1,2 to unsigned 8-bit subs r7, r7, #2 @decrement ht by 2 vst1.32 d6[0], [r1], r3 @store row 1 in destination vst1.32 d6[1], [r1], r3 @store row 2 in destination bgt loop_2_uv @if greater than 0 repeat the loop again b end_loops_uv loop_4_uv: @each iteration processes two rows vld1.8 d6, [r0], r2 @load row 1 in source vld1.8 d8, [r0], r2 @load row 2 in source vmovl.u8 q3, d6 @converting row 1 to 16-bit vmovl.u8 q4, d8 @converting row 2 to 16-bit vmul.s16 q3, q3, q1 @weight mult. for row 1 vmul.s16 q4, q4, q1 @weight mult. for row 2 subs r7, r7, #2 @decrement ht by 2 vrshl.s16 q3, q3, q0 @rounds off the weighted samples from row 1 vrshl.s16 q4, q4, q0 @rounds off the weighted samples from row 2 vaddw.s8 q3, q3, d4 @adding offset for row 1 vaddw.s8 q4, q4, d4 @adding offset for row 2 vqmovun.s16 d6, q3 @saturating row 1 to unsigned 8-bit vqmovun.s16 d8, q4 @saturating row 2 to unsigned 8-bit vst1.8 d6, [r1], r3 @store row 1 in destination vst1.8 d8, [r1], r3 @store row 2 in destination bgt loop_4_uv @if greater than 0 repeat the loop again b end_loops_uv loop_8_uv: @each iteration processes two rows vld1.8 {q3}, [r0], r2 @load row 1 in source vld1.8 {q4}, [r0], r2 @load row 2 in source vmovl.u8 q7, d6 @converting row 1L to 16-bit vld1.8 {q5}, [r0], r2 @load row 3 in source vmovl.u8 q8, d7 @converting row 1H to 16-bit vld1.8 {q6}, [r0], r2 @load row 4 in source vmul.s16 q7, q7, q1 @weight mult. for row 1L vmovl.u8 q9, d8 @converting row 2L to 16-bit vmul.s16 q8, q8, q1 @weight mult. for row 1H vmovl.u8 q10, d9 @converting row 2H to 16-bit vmul.s16 q9, q9, q1 @weight mult. for row 2L vmovl.u8 q11, d10 @converting row 3L to 16-bit vmul.s16 q10, q10, q1 @weight mult. for row 2H vmovl.u8 q12, d11 @converting row 3H to 16-bit vmul.s16 q11, q11, q1 @weight mult. for row 3L vmovl.u8 q13, d12 @converting row 4L to 16-bit vmul.s16 q12, q12, q1 @weight mult. for row 3H vmovl.u8 q14, d13 @converting row 4H to 16-bit vmul.s16 q13, q13, q1 @weight mult. for row 4L vrshl.s16 q7, q7, q0 @rounds off the weighted samples from row 1L vmul.s16 q14, q14, q1 @weight mult. for row 4H vrshl.s16 q8, q8, q0 @rounds off the weighted samples from row 1H vrshl.s16 q9, q9, q0 @rounds off the weighted samples from row 2L vaddw.s8 q7, q7, d4 @adding offset for row 1L vrshl.s16 q10, q10, q0 @rounds off the weighted samples from row 2H vaddw.s8 q8, q8, d4 @adding offset for row 1H vqmovun.s16 d6, q7 @saturating row 1L to unsigned 8-bit vrshl.s16 q11, q11, q0 @rounds off the weighted samples from row 3L vaddw.s8 q9, q9, d4 @adding offset for row 2L vqmovun.s16 d7, q8 @saturating row 1H to unsigned 8-bit vrshl.s16 q12, q12, q0 @rounds off the weighted samples from row 3H vaddw.s8 q10, q10, d4 @adding offset for row 2H vqmovun.s16 d8, q9 @saturating row 2L to unsigned 8-bit vrshl.s16 q13, q13, q0 @rounds off the weighted samples from row 4L vaddw.s8 q11, q11, d4 @adding offset for row 3L vqmovun.s16 d9, q10 @saturating row 2H to unsigned 8-bit vrshl.s16 q14, q14, q0 @rounds off the weighted samples from row 4H vaddw.s8 q12, q12, d4 @adding offset for row 3H vqmovun.s16 d10, q11 @saturating row 3L to unsigned 8-bit vaddw.s8 q13, q13, d4 @adding offset for row 4L vqmovun.s16 d11, q12 @saturating row 3H to unsigned 8-bit vaddw.s8 q14, q14, d4 @adding offset for row 4H vqmovun.s16 d12, q13 @saturating row 4L to unsigned 8-bit vst1.8 {q3}, [r1], r3 @store row 1 in destination vqmovun.s16 d13, q14 @saturating row 4H to unsigned 8-bit vst1.8 {q4}, [r1], r3 @store row 2 in destination subs r7, r7, #4 @decrement ht by 4 vst1.8 {q5}, [r1], r3 @store row 3 in destination vst1.8 {q6}, [r1], r3 @store 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-r9, r15} @Reload the registers from sp