ref: 6ed59ecc8a6c66aae9f6b57b86934e57b4e6a9d0
dir: /vpx_scale/arm/neon/vp8_vpxyv12_copyframe_func_neon.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |vp8_yv12_copy_frame_func_neon|
ARM
REQUIRE8
PRESERVE8
INCLUDE vpx_scale_asm_offsets.asm
AREA ||.text||, CODE, READONLY, ALIGN=2
;void vp8_yv12_copy_frame_func_neon(const YV12_BUFFER_CONFIG *src_ybc,
; YV12_BUFFER_CONFIG *dst_ybc);
|vp8_yv12_copy_frame_func_neon| PROC
push {r4 - r11, lr}
vpush {d8 - d15}
sub sp, sp, #16
;Copy Y plane
ldr r8, [r0, #yv12_buffer_config_u_buffer] ;srcptr1
ldr r9, [r1, #yv12_buffer_config_u_buffer] ;srcptr1
ldr r10, [r0, #yv12_buffer_config_v_buffer] ;srcptr1
ldr r11, [r1, #yv12_buffer_config_v_buffer] ;srcptr1
ldr r4, [r0, #yv12_buffer_config_y_height]
ldr r5, [r0, #yv12_buffer_config_y_width]
ldr r6, [r0, #yv12_buffer_config_y_stride]
ldr r7, [r1, #yv12_buffer_config_y_stride]
ldr r2, [r0, #yv12_buffer_config_y_buffer] ;srcptr1
ldr r3, [r1, #yv12_buffer_config_y_buffer] ;dstptr1
str r8, [sp]
str r9, [sp, #4]
str r10, [sp, #8]
str r11, [sp, #12]
; copy two rows at one time
mov lr, r4, lsr #1
cp_src_to_dst_height_loop
mov r8, r2
mov r9, r3
add r10, r2, r6
add r11, r3, r7
movs r12, r5, lsr #7
ble extra_cp_needed ; y_width < 128
cp_src_to_dst_width_loop
vld1.8 {q0, q1}, [r8]!
vld1.8 {q8, q9}, [r10]!
vld1.8 {q2, q3}, [r8]!
vld1.8 {q10, q11}, [r10]!
vld1.8 {q4, q5}, [r8]!
vld1.8 {q12, q13}, [r10]!
vld1.8 {q6, q7}, [r8]!
vld1.8 {q14, q15}, [r10]!
subs r12, r12, #1
vst1.8 {q0, q1}, [r9]!
vst1.8 {q8, q9}, [r11]!
vst1.8 {q2, q3}, [r9]!
vst1.8 {q10, q11}, [r11]!
vst1.8 {q4, q5}, [r9]!
vst1.8 {q12, q13}, [r11]!
vst1.8 {q6, q7}, [r9]!
vst1.8 {q14, q15}, [r11]!
bne cp_src_to_dst_width_loop
subs lr, lr, #1
add r2, r2, r6, lsl #1
add r3, r3, r7, lsl #1
bne cp_src_to_dst_height_loop
extra_cp_needed
ands r10, r5, #0x7f ;check to see if extra copy is needed
sub r11, r5, r10
ldr r2, [r0, #yv12_buffer_config_y_buffer] ;srcptr1
ldr r3, [r1, #yv12_buffer_config_y_buffer] ;dstptr1
bne extra_cp_src_to_dst_width
end_of_cp_src_to_dst
;Copy U & V planes
ldr r2, [sp] ;srcptr1
ldr r3, [sp, #4] ;dstptr1
mov r4, r4, lsr #1 ;src uv_height
mov r5, r5, lsr #1 ;src uv_width
mov r6, r6, lsr #1 ;src uv_stride
mov r7, r7, lsr #1 ;dst uv_stride
mov r1, #2
cp_uv_loop
;copy two rows at one time
mov lr, r4, lsr #1
cp_src_to_dst_height_uv_loop
mov r8, r2
mov r9, r3
add r10, r2, r6
add r11, r3, r7
movs r12, r5, lsr #6
ble extra_uv_cp_needed
cp_src_to_dst_width_uv_loop
vld1.8 {q0, q1}, [r8]!
vld1.8 {q8, q9}, [r10]!
vld1.8 {q2, q3}, [r8]!
vld1.8 {q10, q11}, [r10]!
subs r12, r12, #1
vst1.8 {q0, q1}, [r9]!
vst1.8 {q8, q9}, [r11]!
vst1.8 {q2, q3}, [r9]!
vst1.8 {q10, q11}, [r11]!
bne cp_src_to_dst_width_uv_loop
subs lr, lr, #1
add r2, r2, r6, lsl #1
add r3, r3, r7, lsl #1
bne cp_src_to_dst_height_uv_loop
extra_uv_cp_needed
ands r10, r5, #0x3f ;check to see if extra copy is needed
sub r11, r5, r10
ldr r2, [sp] ;srcptr1
ldr r3, [sp, #4] ;dstptr1
bne extra_cp_src_to_dst_uv_width
end_of_cp_src_to_dst_uv
subs r1, r1, #1
addne sp, sp, #8
ldrne r2, [sp] ;srcptr1
ldrne r3, [sp, #4] ;dstptr1
bne cp_uv_loop
add sp, sp, #8
vpop {d8 - d15}
pop {r4 - r11, pc}
;=============================
extra_cp_src_to_dst_width
add r2, r2, r11
add r3, r3, r11
add r0, r8, r6
add r11, r9, r7
mov lr, r4, lsr #1
extra_cp_src_to_dst_height_loop
mov r8, r2
mov r9, r3
add r0, r8, r6
add r11, r9, r7
mov r12, r10
extra_cp_src_to_dst_width_loop
vld1.8 {q0}, [r8]!
vld1.8 {q1}, [r0]!
subs r12, r12, #16
vst1.8 {q0}, [r9]!
vst1.8 {q1}, [r11]!
bne extra_cp_src_to_dst_width_loop
subs lr, lr, #1
add r2, r2, r6, lsl #1
add r3, r3, r7, lsl #1
bne extra_cp_src_to_dst_height_loop
b end_of_cp_src_to_dst
;=================================
extra_cp_src_to_dst_uv_width
add r2, r2, r11
add r3, r3, r11
add r0, r8, r6
add r11, r9, r7
mov lr, r4, lsr #1
extra_cp_src_to_dst_height_uv_loop
mov r8, r2
mov r9, r3
add r0, r8, r6
add r11, r9, r7
mov r12, r10
extra_cp_src_to_dst_width_uv_loop
vld1.8 {d0}, [r8]!
vld1.8 {d1}, [r0]!
subs r12, r12, #8
vst1.8 {d0}, [r9]!
vst1.8 {d1}, [r11]!
bne extra_cp_src_to_dst_width_uv_loop
subs lr, lr, #1
add r2, r2, r6, lsl #1
add r3, r3, r7, lsl #1
bne extra_cp_src_to_dst_height_uv_loop
b end_of_cp_src_to_dst_uv
ENDP
END