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/*
* (C) Gražvydas "notaz" Ignotas, 2011
*
* This work is licensed under the terms of any of these licenses
* (at your option):
* - GNU GPL, version 2 or later.
* - GNU LGPL, version 2.1 or later.
* See the COPYING file in the top-level directory.
*/
#include "arm_features.h"
#ifdef __MACH__
.data
.align 2
ptr_ChanBuf: .word ESYM(ChanBuf)
ptr_SSumLR: .word ESYM(SSumLR)
#endif
.text
.align 2
.macro load_varadr reg var
#if defined(__ARM_ARCH_7A__) && !defined(__PIC__)
movw \reg, #:lower16:ESYM(\var)
movt \reg, #:upper16:ESYM(\var)
#elif defined(__ARM_ARCH_7A__) && defined(__MACH__)
movw \reg, #:lower16:(ptr_\var-(1678f+8))
movt \reg, #:upper16:(ptr_\var-(1678f+8))
1678:
ldr \reg, [pc, \reg]
#else
ldr \reg, =ESYM(\var)
#endif
.endm
#ifdef __ARM_NEON__
FUNCTION(mix_chan): @ (int start, int count, int lv, int rv)
vmov.32 d14[0], r2
vmov.32 d14[1], r3 @ multipliers
mov r12, r0
load_varadr r0, ChanBuf
load_varadr r2, SSumLR
add r0, r12, lsl #2
add r2, r12, lsl #3
0:
vldmia r0!, {d0-d1}
vldmia r2, {d2-d5}
vmul.s32 d10, d14, d0[0]
vmul.s32 d11, d14, d0[1]
vmul.s32 d12, d14, d1[0]
vmul.s32 d13, d14, d1[1]
vsra.s32 q1, q5, #14
vsra.s32 q2, q6, #14
subs r1, #4
blt mc_finish
vstmia r2!, {d2-d5}
bgt 0b
nop
bxeq lr
mc_finish:
vstmia r2!, {d2}
cmp r1, #-2
vstmiage r2!, {d3}
cmp r1, #-1
vstmiage r2!, {d4}
bx lr
FUNCTION(mix_chan_rvb): @ (int start, int count, int lv, int rv, int *rvb)
vmov.32 d14[0], r2
vmov.32 d14[1], r3 @ multipliers
mov r12, r0
load_varadr r0, ChanBuf
ldr r3, [sp] @ rvb
load_varadr r2, SSumLR
add r0, r12, lsl #2
add r2, r12, lsl #3
add r3, r12, lsl #3
0:
vldmia r0!, {d0-d1}
vldmia r2, {d2-d5}
vldmia r3, {d6-d9}
vmul.s32 d10, d14, d0[0]
vmul.s32 d11, d14, d0[1]
vmul.s32 d12, d14, d1[0]
vmul.s32 d13, d14, d1[1]
vsra.s32 q1, q5, #14
vsra.s32 q2, q6, #14
vsra.s32 q3, q5, #14
vsra.s32 q4, q6, #14
subs r1, #4
blt mcr_finish
vstmia r2!, {d2-d5}
vstmia r3!, {d6-d9}
bgt 0b
nop
bxeq lr
mcr_finish:
vstmia r2!, {d2}
vstmia r3!, {d6}
cmp r1, #-2
vstmiage r2!, {d3}
vstmiage r3!, {d7}
cmp r1, #-1
vstmiage r2!, {d4}
vstmiage r3!, {d8}
bx lr
#elif defined(HAVE_ARMV5)
FUNCTION(mix_chan): @ (int start, int count, int lv, int rv)
stmfd sp!, {r4-r8,lr}
orr r3, r2, r3, lsl #16
lsl r3, #1 @ packed multipliers << 1
mov r12, r0
load_varadr r0, ChanBuf
load_varadr r2, SSumLR
add r0, r12, lsl #2
add r2, r12, lsl #3
0:
ldmia r0!, {r4,r5}
ldmia r2, {r6-r8,lr}
lsl r4, #1 @ adjust for mul
lsl r5, #1
smlawb r6, r4, r3, r6
smlawt r7, r4, r3, r7
smlawb r8, r5, r3, r8
smlawt lr, r5, r3, lr
subs r1, #2
blt mc_finish
stmia r2!, {r6-r8,lr}
bgt 0b
ldmeqfd sp!, {r4-r8,pc}
mc_finish:
stmia r2!, {r6,r7}
ldmfd sp!, {r4-r8,pc}
FUNCTION(mix_chan_rvb): @ (int start, int count, int lv, int rv, int *rvb)
stmfd sp!, {r4-r8,lr}
orr lr, r2, r3, lsl #16
lsl lr, #1
ldr r3, [sp] @ rvb
load_varadr r2, SSumLR
load_varadr r4, ChanBuf
add r2, r2, r0, lsl #3
add r3, r3, r0, lsl #3
add r0, r4, r0, lsl #2
0:
ldr r4, [r0], #4
ldmia r2, {r6,r7}
ldmia r3, {r8,r12}
lsl r4, #1
smlawb r6, r4, lr, r6 @ supposedly takes single cycle?
smlawt r7, r4, lr, r7
smlawb r8, r4, lr, r8
smlawt r12,r4, lr, r12
subs r1, #1
stmia r2!, {r6,r7}
stmia r3!, {r8,r12}
bgt 0b
ldmfd sp!, {r4-r8,pc}
#endif
@ vim:filetype=armasm
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