68 lines
2.1 KiB
NASM
68 lines
2.1 KiB
NASM
;
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; Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license and patent
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; grant that can be found in the LICENSE file in the root of the source
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; tree. All contributing project authors may be found in the AUTHORS
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; file in the root of the source tree.
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;
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EXPORT |vp8_memcpy_neon|
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ARM
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REQUIRE8
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PRESERVE8
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AREA ||.text||, CODE, READONLY, ALIGN=2
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;=========================================
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;void vp8_memcpy_neon(unsigned char *dst_ptr, unsigned char *src_ptr, int sz);
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|vp8_memcpy_neon| PROC
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;pld [r1] ;preload pred data
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;pld [r1, #128]
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;pld [r1, #256]
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;pld [r1, #384]
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mov r12, r2, lsr #8 ;copy 256 bytes data at one time
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memcpy_neon_loop
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vld1.8 {q0, q1}, [r1]! ;load src data
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subs r12, r12, #1
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vld1.8 {q2, q3}, [r1]!
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vst1.8 {q0, q1}, [r0]! ;copy to dst_ptr
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vld1.8 {q4, q5}, [r1]!
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vst1.8 {q2, q3}, [r0]!
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vld1.8 {q6, q7}, [r1]!
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vst1.8 {q4, q5}, [r0]!
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vld1.8 {q8, q9}, [r1]!
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vst1.8 {q6, q7}, [r0]!
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vld1.8 {q10, q11}, [r1]!
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vst1.8 {q8, q9}, [r0]!
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vld1.8 {q12, q13}, [r1]!
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vst1.8 {q10, q11}, [r0]!
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vld1.8 {q14, q15}, [r1]!
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vst1.8 {q12, q13}, [r0]!
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vst1.8 {q14, q15}, [r0]!
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;pld [r1] ;preload pred data -- need to adjust for real device
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;pld [r1, #128]
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;pld [r1, #256]
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;pld [r1, #384]
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bne memcpy_neon_loop
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ands r3, r2, #0xff ;extra copy
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beq done_copy_neon_loop
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extra_copy_neon_loop
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vld1.8 {q0}, [r1]! ;load src data
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subs r3, r3, #16
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vst1.8 {q0}, [r0]!
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bne extra_copy_neon_loop
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done_copy_neon_loop
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bx lr
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ENDP
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END
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