synth_neon64.S
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/*
synth_neon64: NEON optimized synth for AArch64
copyright 1995-2014 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Taihei Monma
*/
#include "mangle.h"
#ifndef __APPLE__
.section .rodata
#else
.data
#endif
ALIGN16
maxmin_s16:
.word 32767
.word -32768
.text
ALIGN4
.globl ASM_NAME(synth_1to1_neon64_asm)
#ifdef __ELF__
.type ASM_NAME(synth_1to1_neon64_asm), %function
#endif
ASM_NAME(synth_1to1_neon64_asm):
add x0, x0, #32
sub x0, x0, x3, lsl #1
eor v31.16b, v31.16b, v31.16b
adrp x5, AARCH64_PCREL_HI(maxmin_s16)
add x5, x5, AARCH64_PCREL_LO(maxmin_s16)
ld2r {v28.4s,v29.4s}, [x5]
mov w4, #4
mov x5, #64
1:
ld1 {v0.8h,v1.8h}, [x0], x5
ld1 {v2.8h,v3.8h}, [x0], x5
ld1 {v4.8h,v5.8h}, [x0], x5
ld1 {v6.8h,v7.8h}, [x0], x5
ld1 {v16.8h,v17.8h,v18.8h,v19.8h}, [x1], #64
ld1 {v20.8h,v21.8h,v22.8h,v23.8h}, [x1], #64
smull v24.4s, v0.4h, v16.4h
smull v25.4s, v2.4h, v18.4h
smull v26.4s, v4.4h, v20.4h
smull v27.4s, v6.4h, v22.4h
smlal2 v24.4s, v0.8h, v16.8h
smlal2 v25.4s, v2.8h, v18.8h
smlal2 v26.4s, v4.8h, v20.8h
smlal2 v27.4s, v6.8h, v22.8h
smlal v24.4s, v1.4h, v17.4h
smlal v25.4s, v3.4h, v19.4h
smlal v26.4s, v5.4h, v21.4h
smlal v27.4s, v7.4h, v23.4h
smlal2 v24.4s, v1.8h, v17.8h
smlal2 v25.4s, v3.8h, v19.8h
smlal2 v26.4s, v5.8h, v21.8h
smlal2 v27.4s, v7.8h, v23.8h
addp v0.4s, v24.4s, v25.4s
addp v1.4s, v26.4s, v27.4s
addp v0.4s, v0.4s, v1.4s
ld2 {v4.4h,v5.4h}, [x2]
sqrshrn v4.4h, v0.4s, #13
cmgt v2.4s, v0.4s, v28.4s
cmgt v3.4s, v29.4s, v0.4s
add v2.4s, v2.4s, v3.4s
add v31.4s, v31.4s, v2.4s
st2 {v4.4h,v5.4h}, [x2], #16
subs w4, w4, #1
b.ne 1b
mov w4, #4
mov x6, #-32
2:
ld1 {v0.8h,v1.8h}, [x0], x5
ld1 {v2.8h,v3.8h}, [x0], x5
ld1 {v4.8h,v5.8h}, [x0], x5
ld1 {v6.8h,v7.8h}, [x0], x5
ld1 {v16.8h,v17.8h}, [x1], x6
ld1 {v18.8h,v19.8h}, [x1], x6
ld1 {v20.8h,v21.8h}, [x1], x6
ld1 {v22.8h,v23.8h}, [x1], x6
smull v24.4s, v0.4h, v16.4h
smull v25.4s, v2.4h, v18.4h
smull v26.4s, v4.4h, v20.4h
smull v27.4s, v6.4h, v22.4h
smlal2 v24.4s, v0.8h, v16.8h
smlal2 v25.4s, v2.8h, v18.8h
smlal2 v26.4s, v4.8h, v20.8h
smlal2 v27.4s, v6.8h, v22.8h
smlal v24.4s, v1.4h, v17.4h
smlal v25.4s, v3.4h, v19.4h
smlal v26.4s, v5.4h, v21.4h
smlal v27.4s, v7.4h, v23.4h
smlal2 v24.4s, v1.8h, v17.8h
smlal2 v25.4s, v3.8h, v19.8h
smlal2 v26.4s, v5.8h, v21.8h
smlal2 v27.4s, v7.8h, v23.8h
addp v0.4s, v24.4s, v25.4s
addp v1.4s, v26.4s, v27.4s
addp v0.4s, v0.4s, v1.4s
ld2 {v4.4h,v5.4h}, [x2]
sqrshrn v4.4h, v0.4s, #13
cmgt v2.4s, v0.4s, v28.4s
cmgt v3.4s, v29.4s, v0.4s
add v2.4s, v2.4s, v3.4s
add v31.4s, v31.4s, v2.4s
st2 {v4.4h,v5.4h}, [x2], #16
subs w4, w4, #1
b.ne 2b
AARCH64_DUP_2D(v0, v31, 1)
add v0.4s, v0.4s, v31.4s
AARCH64_DUP_4S(v1, v0, 1)
add v0.4s, v0.4s, v1.4s
umov w0, v0.s[0]
neg w0, w0
ret
NONEXEC_STACK