e3f850ee05
The current code stores pointers to coefficient tables and loads them to access the tables contents. As these pointers are stored in the code sections, it means we end up with text relocations. eu-findtextrel will thus complain about code not compiled with -fpic/-fPIC. Since the pointers are stored in the code sections, we can actually cheat and let the assembler generate relative addressing when accessing the coefficient tables, and just load their location with adr. Change-Id: Ib74ae2d3f2bab80b29991355f2dbe6955f38f6ae
130 lines
3.4 KiB
NASM
130 lines
3.4 KiB
NASM
;
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; Copyright (c) 2010 The WebM 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
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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EXPORT |vp8_dequant_idct_add_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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;void vp8_dequant_idct_neon(short *input, short *dq, unsigned char *pred,
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; unsigned char *dest, int pitch, int stride)
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; r0 short *input,
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; r1 short *dq,
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; r2 unsigned char *pred
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; r3 unsigned char *dest
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; sp int pitch
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; sp+4 int stride
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|vp8_dequant_idct_add_neon| PROC
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vld1.16 {q3, q4}, [r0]
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vld1.16 {q5, q6}, [r1]
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ldr r1, [sp] ; pitch
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vld1.32 {d14[0]}, [r2], r1
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vld1.32 {d14[1]}, [r2], r1
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vld1.32 {d15[0]}, [r2], r1
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vld1.32 {d15[1]}, [r2]
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ldr r1, [sp, #4] ; stride
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adr r12, cospi8sqrt2minus1 ; pointer to the first constant
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vmul.i16 q1, q3, q5 ;input for short_idct4x4llm_neon
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vmul.i16 q2, q4, q6
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;|short_idct4x4llm_neon| PROC
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vld1.16 {d0}, [r12]
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vswp d3, d4 ;q2(vp[4] vp[12])
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vqdmulh.s16 q3, q2, d0[2]
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vqdmulh.s16 q4, q2, d0[0]
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vqadd.s16 d12, d2, d3 ;a1
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vqsub.s16 d13, d2, d3 ;b1
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vshr.s16 q3, q3, #1
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vshr.s16 q4, q4, #1
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vqadd.s16 q3, q3, q2
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vqadd.s16 q4, q4, q2
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vqsub.s16 d10, d6, d9 ;c1
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vqadd.s16 d11, d7, d8 ;d1
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vqadd.s16 d2, d12, d11
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vqadd.s16 d3, d13, d10
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vqsub.s16 d4, d13, d10
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vqsub.s16 d5, d12, d11
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vtrn.32 d2, d4
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vtrn.32 d3, d5
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vtrn.16 d2, d3
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vtrn.16 d4, d5
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; memset(input, 0, 32) -- 32bytes
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vmov.i16 q14, #0
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vswp d3, d4
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vqdmulh.s16 q3, q2, d0[2]
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vqdmulh.s16 q4, q2, d0[0]
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vqadd.s16 d12, d2, d3 ;a1
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vqsub.s16 d13, d2, d3 ;b1
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vmov q15, q14
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vshr.s16 q3, q3, #1
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vshr.s16 q4, q4, #1
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vqadd.s16 q3, q3, q2
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vqadd.s16 q4, q4, q2
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vqsub.s16 d10, d6, d9 ;c1
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vqadd.s16 d11, d7, d8 ;d1
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vqadd.s16 d2, d12, d11
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vqadd.s16 d3, d13, d10
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vqsub.s16 d4, d13, d10
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vqsub.s16 d5, d12, d11
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vst1.16 {q14, q15}, [r0]
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vrshr.s16 d2, d2, #3
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vrshr.s16 d3, d3, #3
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vrshr.s16 d4, d4, #3
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vrshr.s16 d5, d5, #3
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vtrn.32 d2, d4
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vtrn.32 d3, d5
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vtrn.16 d2, d3
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vtrn.16 d4, d5
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vaddw.u8 q1, q1, d14
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vaddw.u8 q2, q2, d15
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vqmovun.s16 d0, q1
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vqmovun.s16 d1, q2
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vst1.32 {d0[0]}, [r3], r1
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vst1.32 {d0[1]}, [r3], r1
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vst1.32 {d1[0]}, [r3], r1
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vst1.32 {d1[1]}, [r3]
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bx lr
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ENDP ; |vp8_dequant_idct_add_neon|
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; Constant Pool
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cospi8sqrt2minus1 DCD 0x4e7b4e7b
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sinpi8sqrt2 DCD 0x8a8c8a8c
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END
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