@/***************************************************************************** @* @* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore @* @* 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. @* @*****************************************************************************/ @/** @******************************************************************************* @* @file @* ihevc_intra_pred_luma_horz_neon.s @* @* @brief @* contains function definition for intra prediction interpolation filters @* @* @* @author @* parthiban v @* @* @par list of functions: @* - ihevc_intra_pred_luma_horz() @* @* @remarks @* none @* @******************************************************************************* @*/ @ @/** @******************************************************************************* @* @* @brief @* intra prediction interpolation filter for horizontal luma variable. @* @* @par description: @* horizontal intraprediction(mode 10) with.extern samples location @* pointed by 'pu1_ref' to the tu block location pointed by 'pu1_dst' refer @* to section 8.4.4.2.6 in the standard (special case) @* @* @param[in] pu1_src @* uword8 pointer to the source @* @* @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] nt @* integer transform block size @* @* @param[in] mode @* integer intraprediction mode @* @* @returns @* @* @remarks @* none @* @******************************************************************************* @*/ @void ihevc_intra_pred_luma_horz(uword8 *pu1_ref, @ word32 src_strd, @ uword8 *pu1_dst, @ word32 dst_strd, @ word32 nt, @ word32 mode) @**************variables vs registers***************************************** @r0 => *pu1_ref @r1 => src_strd @r2 => *pu1_dst @r3 => dst_strd .text .align 4 .globl ihevc_intra_pred_luma_horz_a9q .type ihevc_intra_pred_luma_horz_a9q, %function ihevc_intra_pred_luma_horz_a9q: stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments ldr r4,[sp,#40] @loads nt @ldr r5,[sp,#44] @loads mode lsl r6,r4,#1 @two_nt add r12,r0,r6 @*pu1_ref[two_nt] cmp r4,#4 @if nt == 4 beq core_loop_4 cmp r4,#8 @if nt == 8 beq core_loop_8 cmp r4,#16 @if nt == 16 beq core_loop_16 sub r12,r12,#16 @move to 16th value pointer add r9,r2,#16 core_loop_32: vld1.8 {q0},[r12] @load 16 values. d1[7] will have the 1st value. vdup.8 q1,d1[7] @duplicate the i value. vdup.8 q2,d1[6] @duplicate the ii value. vdup.8 q3,d1[5] @duplicate the iii value. vst1.8 {q1},[r2],r3 @store in 1st row 0-16 columns vst1.8 {q1},[r9],r3 @store in 1st row 16-32 columns vdup.8 q4,d1[4] vst1.8 {q2},[r2],r3 vst1.8 {q2},[r9],r3 vdup.8 q1,d1[3] vst1.8 {q3},[r2],r3 vst1.8 {q3},[r9],r3 vdup.8 q2,d1[2] vst1.8 {q4},[r2],r3 vst1.8 {q4},[r9],r3 vdup.8 q3,d1[1] vst1.8 {q1},[r2],r3 vst1.8 {q1},[r9],r3 vdup.8 q4,d1[0] vst1.8 {q2},[r2],r3 vst1.8 {q2},[r9],r3 vdup.8 q1,d0[7] vst1.8 {q3},[r2],r3 vst1.8 {q3},[r9],r3 vdup.8 q2,d0[6] vst1.8 {q4},[r2],r3 vst1.8 {q4},[r9],r3 vdup.8 q3,d0[5] vst1.8 {q1},[r2],r3 vst1.8 {q1},[r9],r3 vdup.8 q4,d0[4] vst1.8 {q2},[r2],r3 vst1.8 {q2},[r9],r3 vdup.8 q1,d0[3] vst1.8 {q3},[r2],r3 vst1.8 {q3},[r9],r3 vdup.8 q2,d0[2] vst1.8 {q4},[r2],r3 vst1.8 {q4},[r9],r3 vdup.8 q3,d0[1] vst1.8 {q1},[r2],r3 vst1.8 {q1},[r9],r3 sub r12,r12,#16 @move to 16th value pointer vdup.8 q4,d0[0] vst1.8 {q2},[r2],r3 vst1.8 {q2},[r9],r3 subs r4,r4,#16 @decrement the loop count by 16 vst1.8 {q3},[r2],r3 vst1.8 {q3},[r9],r3 vst1.8 {q4},[r2],r3 vst1.8 {q4},[r9],r3 bgt core_loop_32 ldmfd sp!,{r4-r12,r15} @reload the registers from sp b end_func core_loop_16: ldrb lr,[r12],#1 @pu1_ref[two_nt] vld1.8 {q15},[r12] @pu1_ref[two_nt + 1 + col] vdup.8 d28,lr sub r12,r12,#17 vld1.8 {q0},[r12] vdup.8 d26,d1[7] vmovl.u8 q13,d26 vdup.8 q1,d1[6] vsubl.u8 q12,d30,d28 vdup.8 q2,d1[5] vshr.s16 q12,q12,#1 vdup.8 q3,d1[4] vqadd.s16 q11,q13,q12 vdup.8 q4,d1[3] vqmovun.s16 d22,q11 vst1.8 {d22},[r2]! vdup.8 q5,d1[2] vsubl.u8 q12,d31,d28 vdup.8 q6,d1[1] vshr.s16 q12,q12,#1 vdup.8 q7,d1[0] vqadd.s16 q11,q13,q12 vdup.8 q8,d0[7] vqmovun.s16 d22,q11 vst1.8 {d22},[r2],r3 sub r2,r2,#8 vst1.8 {q1},[r2],r3 vst1.8 {q2},[r2],r3 vst1.8 {q3},[r2],r3 vst1.8 {q4},[r2],r3 vdup.8 q1,d0[6] vst1.8 {q5},[r2],r3 vdup.8 q2,d0[5] vst1.8 {q6},[r2],r3 vdup.8 q3,d0[4] vst1.8 {q7},[r2],r3 vdup.8 q4,d0[3] vst1.8 {q8},[r2],r3 vdup.8 q5,d0[2] vst1.8 {q1},[r2],r3 vdup.8 q6,d0[1] vst1.8 {q2},[r2],r3 vdup.8 q7,d0[0] vst1.8 {q3},[r2],r3 vst1.8 {q4},[r2],r3 vst1.8 {q5},[r2],r3 vst1.8 {q6},[r2],r3 vst1.8 {q7},[r2],r3 ldmfd sp!,{r4-r12,r15} @reload the registers from sp b end_func core_loop_8: ldrb lr,[r12] @pu1_ref[two_nt] add r12,r12,#1 @pu1_ref[two_nt + 1] vld1.8 {d30},[r12] @pu1_ref[two_nt + 1 + col] sub r12,r12,#9 vld1.8 {d0},[r12] vdup.8 d26,d0[7] vdup.8 d28,lr vdup.8 d3,d0[6] vmovl.u8 q13,d26 vdup.8 d4,d0[5] vsubl.u8 q12,d30,d28 vdup.8 d5,d0[4] vshr.s16 q12,q12,#1 vdup.8 d6,d0[3] vqadd.s16 q11,q13,q12 vdup.8 d7,d0[2] vqmovun.s16 d22,q11 vst1.8 {d22},[r2],r3 vst1.8 {d3},[r2],r3 vdup.8 d8,d0[1] vst1.8 {d4},[r2],r3 vst1.8 {d5},[r2],r3 vdup.8 d9,d0[0] vst1.8 {d6},[r2],r3 vst1.8 {d7},[r2],r3 vst1.8 {d8},[r2],r3 vst1.8 {d9},[r2],r3 ldmfd sp!,{r4-r12,r15} @reload the registers from sp b end_func core_loop_4: ldrb lr,[r12] @pu1_ref[two_nt] add r12,r12,#1 @pu1_ref[two_nt + 1] vld1.8 {d30},[r12] @pu1_ref[two_nt + 1 + col] sub r12,r12,#5 vld1.8 {d0},[r12] vdup.8 d28,lr vdup.8 d26,d0[3] vmovl.u8 q13,d26 vdup.8 d3,d0[2] vsubl.u8 q12,d30,d28 vdup.8 d4,d0[1] vshr.s16 q12,q12,#1 vdup.8 d5,d0[0] vqadd.s16 q11,q13,q12 vqmovun.s16 d22,q11 vst1.32 {d22[0]},[r2],r3 vst1.32 {d3[0]},[r2],r3 vst1.32 {d4[0]},[r2],r3 vst1.32 {d5[0]},[r2],r3 ldmfd sp!,{r4-r12,r15} @reload the registers from sp end_func: