@/***************************************************************************** @* @* 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_mode2_neon.s @* @* @brief @* contains function definitions for intra prediction dc filtering. @* functions are coded using neon intrinsics and can be compiled using @* rvct @* @* @author @* yogeswaran rs @* @* @par list of functions: @* @* @* @remarks @* none @* @******************************************************************************* @*/ @/** @******************************************************************************* @* @* @brief @* luma intraprediction filter for dc input @* @* @par description: @* @* @param[in] pu1_ref @* 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] pi1_coeff @* word8 pointer to the planar coefficients @* @* @param[in] nt @* size of tranform block @* @* @param[in] mode @* type of filtering @* @* @returns @* @* @remarks @* none @* @******************************************************************************* @*/ @void ihevc_intra_pred_luma_mode2(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 @stack contents from #40 @ nt @ mode @ pi1_coeff .text .align 4 .globl ihevc_intra_pred_chroma_mode2_a9q .type ihevc_intra_pred_chroma_mode2_a9q, %function ihevc_intra_pred_chroma_mode2_a9q: stmfd sp!, {r4-r12, r14} @stack stores the values of the arguments ldr r4,[sp,#40] @loads nt mov r8,#-4 cmp r4,#4 beq mode2_4 add r0,r0,r4,lsl #2 sub r0,r0,#0x12 @src[1] add r10,r0,#-2 prologue_cpy_32: vld2.8 {d0,d1},[r0],r8 mov r11,r4 vrev64.8 d16,d0 vrev64.8 d17,d1 vld2.8 {d2,d3},[r10],r8 mov r6, r2 vld2.8 {d4,d5},[r0],r8 vld2.8 {d6,d7},[r10],r8 lsr r1, r4, #3 vld2.8 {d8,d9},[r0],r8 vld2.8 {d10,d11},[r10],r8 vld2.8 {d12,d13},[r0],r8 mul r1, r4, r1 vld2.8 {d14,d15},[r10],r8 add r7,r6,r3 vrev64.8 d18,d2 vrev64.8 d19,d3 lsl r5, r3, #2 vrev64.8 d20,d4 vrev64.8 d21,d5 add r9,r7,r3 vrev64.8 d22,d6 vrev64.8 d23,d7 vrev64.8 d24,d8 vrev64.8 d25,d9 vrev64.8 d26,d10 subs r1,r1,#8 vrev64.8 d27,d11 vrev64.8 d28,d12 vrev64.8 d29,d13 vrev64.8 d30,d14 add r14,r9,r3 vrev64.8 d31,d15 beq epilogue_mode2 sub r12,r4,#8 kernel_mode2: vst2.8 {d16,d17},[r6],r5 vst2.8 {d18,d19},[r7],r5 subs r11,r11,#8 vst2.8 {d20,d21},[r9],r5 vst2.8 {d22,d23},[r14],r5 vst2.8 {d24,d25},[r6],r5 addgt r2,r2,#16 vst2.8 {d26,d27},[r7],r5 vst2.8 {d28,d29},[r9],r5 vst2.8 {d30,d31},[r14],r5 vld2.8 {d0,d1},[r0],r8 movle r11,r4 vld2.8 {d2,d3},[r10],r8 vld2.8 {d4,d5},[r0],r8 addle r2, r2, r3, lsl #2 vld2.8 {d6,d7},[r10],r8 vrev64.8 d16,d0 vld2.8 {d8,d9},[r0],r8 vld2.8 {d10,d11},[r10],r8 suble r2, r6,#16 vld2.8 {d12,d13},[r0],r8 vrev64.8 d17,d1 vld2.8 {d14,d15},[r10],r8 subs r12,r12,#8 mov r6, r2 addle r0, r0, r4,lsl #1 add r7, r6, r3 vrev64.8 d18,d2 suble r0, r0, #16 vrev64.8 d19,d3 vrev64.8 d20,d4 movle r12,r4 vrev64.8 d21,d5 vrev64.8 d22,d6 add r9, r7, r3 vrev64.8 d23,d7 vrev64.8 d24,d8 add r10,r0,#-2 vrev64.8 d25,d9 vrev64.8 d26,d10 subs r1, r1, #8 vrev64.8 d27,d11 vrev64.8 d28,d12 vrev64.8 d29,d13 vrev64.8 d30,d14 add r14, r9, r3 vrev64.8 d31,d15 bne kernel_mode2 epilogue_mode2: vst2.8 {d16,d17},[r6],r5 vst2.8 {d18,d19},[r7],r5 vst2.8 {d20,d21},[r9],r5 vst2.8 {d22,d23},[r14],r5 vst2.8 {d24,d25},[r6],r5 vst2.8 {d26,d27},[r7],r5 vst2.8 {d28,d29},[r9],r5 vst2.8 {d30,d31},[r14],r5 b end_func mode2_4: lsl r12,r4,#1 add r0,r0,r12 sub r0,r0,#2 vld2.8 {d12,d13},[r0],r8 vshl.i64 d0,d12,#32 add r10,r0,#2 vshl.i64 d1,d13,#32 vrev64.8 d0,d0 vld2.8 {d14,d15},[r10],r8 vshl.i64 d2,d14,#32 vrev64.8 d1,d1 vshl.i64 d3,d15,#32 vzip.8 d0,d1 vst1.8 {d0},[r2],r3 vrev64.8 d2,d2 vld2.8 {d16,d17},[r0],r8 vshl.i64 d4,d16,#32 vrev64.8 d3,d3 vshl.i64 d5,d17,#32 vzip.8 d2,d3 vrev64.8 d4,d4 vrev64.8 d5,d5 vst1.8 {d2},[r2],r3 vld2.8 {d18,d19},[r10],r8 vshl.i64 d6,d18,#32 vzip.8 d4,d5 vshl.i64 d7,d19,#32 vrev64.8 d6,d6 vst1.8 {d4},[r2],r3 vrev64.8 d7,d7 vzip.8 d6,d7 vst1.8 {d6},[r2],r3 end_func: ldmfd sp!,{r4-r12,r15} @reload the registers from sp