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arm: fmtconvert: Split armv6 fmtconvert code off from vfp code

tags/n2.1
Diego Biurrun 12 years ago
parent
7ffda66fd5
commit
f0389eb777
4 changed files with 85 additions and 63 deletions
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  1. +3
    -1
      libavcodec/arm/Makefile
  2. +4
    -5
      libavcodec/arm/fmtconvert_init_arm.c
  3. +0
    -57
      libavcodec/arm/fmtconvert_vfp.S
  4. +78
    -0
      libavcodec/arm/fmtconvert_vfp_armv6.S

+ 3
- 1
libavcodec/arm/Makefile View File

@@ -52,11 +52,13 @@ ARMV6-OBJS-$(CONFIG_VP8_DECODER) += arm/vp8_armv6.o \
arm/vp8dsp_init_armv6.o \
arm/vp8dsp_armv6.o

VFP-OBJS += arm/fmtconvert_vfp.o

VFP-OBJS-$(CONFIG_DCA_DECODER) += arm/dcadsp_vfp.o \
arm/synth_filter_vfp.o
VFP-OBJS-$(CONFIG_FFT) += arm/fft_vfp.o
VFP-OBJS-$(CONFIG_MDCT) += arm/mdct_vfp.o
VFP-OBJS-$(HAVE_ARMV6) += arm/fmtconvert_vfp.o
VFP-OBJS-$(HAVE_ARMV6) += arm/fmtconvert_vfp_armv6.o

NEON-OBJS += arm/fmtconvert_neon.o



+ 4
- 5
libavcodec/arm/fmtconvert_init_arm.c View File

@@ -43,16 +43,15 @@ av_cold void ff_fmt_convert_init_arm(FmtConvertContext *c, AVCodecContext *avctx
{
int cpu_flags = av_get_cpu_flags();

if (have_vfp(cpu_flags) && have_armv6(cpu_flags)) {
if (have_vfp(cpu_flags)) {
if (!have_vfpv3(cpu_flags)) {
// These functions don't use anything armv6 specific in themselves,
// but ff_float_to_int16_vfp which is in the same assembly source
// file does, thus the whole file requires armv6 to be built.
c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_vfp;
c->int32_to_float_fmul_array8 = ff_int32_to_float_fmul_array8_vfp;
}

c->float_to_int16 = ff_float_to_int16_vfp;
if (have_armv6(cpu_flags)) {
c->float_to_int16 = ff_float_to_int16_vfp;
}
}

if (have_neon(cpu_flags)) {


+ 0
- 57
libavcodec/arm/fmtconvert_vfp.S View File

@@ -1,5 +1,4 @@
/*
* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
* Copyright (c) 2013 RISC OS Open Ltd <bavison@riscosopen.org>
*
* This file is part of Libav.
@@ -22,62 +21,6 @@
#include "config.h"
#include "libavutil/arm/asm.S"

/**
* ARM VFP optimized float to int16 conversion.
* Assume that len is a positive number and is multiple of 8, destination
* buffer is at least 4 bytes aligned (8 bytes alignment is better for
* performance), little-endian byte sex.
*/
@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len)
function ff_float_to_int16_vfp, export=1
push {r4-r8,lr}
vpush {d8-d11}
vldmia r1!, {s16-s23}
vcvt.s32.f32 s0, s16
vcvt.s32.f32 s1, s17
vcvt.s32.f32 s2, s18
vcvt.s32.f32 s3, s19
vcvt.s32.f32 s4, s20
vcvt.s32.f32 s5, s21
vcvt.s32.f32 s6, s22
vcvt.s32.f32 s7, s23
1:
subs r2, r2, #8
vmov r3, r4, s0, s1
vmov r5, r6, s2, s3
vmov r7, r8, s4, s5
vmov ip, lr, s6, s7
it gt
vldmiagt r1!, {s16-s23}
ssat r4, #16, r4
ssat r3, #16, r3
ssat r6, #16, r6
ssat r5, #16, r5
pkhbt r3, r3, r4, lsl #16
pkhbt r4, r5, r6, lsl #16
itttt gt
vcvtgt.s32.f32 s0, s16
vcvtgt.s32.f32 s1, s17
vcvtgt.s32.f32 s2, s18
vcvtgt.s32.f32 s3, s19
itttt gt
vcvtgt.s32.f32 s4, s20
vcvtgt.s32.f32 s5, s21
vcvtgt.s32.f32 s6, s22
vcvtgt.s32.f32 s7, s23
ssat r8, #16, r8
ssat r7, #16, r7
ssat lr, #16, lr
ssat ip, #16, ip
pkhbt r5, r7, r8, lsl #16
pkhbt r6, ip, lr, lsl #16
stmia r0!, {r3-r6}
bgt 1b

vpop {d8-d11}
pop {r4-r8,pc}
endfunc

/**
* ARM VFP optimised int32 to float conversion.
* Assume len is a multiple of 8, destination buffer is at least 4 bytes aligned


+ 78
- 0
libavcodec/arm/fmtconvert_vfp_armv6.S View File

@@ -0,0 +1,78 @@
/*
* Copyright (c) 2008 Siarhei Siamashka <ssvb@users.sourceforge.net>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "config.h"
#include "libavutil/arm/asm.S"

/**
* ARM VFP optimized float to int16 conversion.
* Assume that len is a positive number and is multiple of 8, destination
* buffer is at least 4 bytes aligned (8 bytes alignment is better for
* performance), little-endian byte sex.
*/
@ void ff_float_to_int16_vfp(int16_t *dst, const float *src, int len)
function ff_float_to_int16_vfp, export=1
push {r4-r8,lr}
vpush {d8-d11}
vldmia r1!, {s16-s23}
vcvt.s32.f32 s0, s16
vcvt.s32.f32 s1, s17
vcvt.s32.f32 s2, s18
vcvt.s32.f32 s3, s19
vcvt.s32.f32 s4, s20
vcvt.s32.f32 s5, s21
vcvt.s32.f32 s6, s22
vcvt.s32.f32 s7, s23
1:
subs r2, r2, #8
vmov r3, r4, s0, s1
vmov r5, r6, s2, s3
vmov r7, r8, s4, s5
vmov ip, lr, s6, s7
it gt
vldmiagt r1!, {s16-s23}
ssat r4, #16, r4
ssat r3, #16, r3
ssat r6, #16, r6
ssat r5, #16, r5
pkhbt r3, r3, r4, lsl #16
pkhbt r4, r5, r6, lsl #16
itttt gt
vcvtgt.s32.f32 s0, s16
vcvtgt.s32.f32 s1, s17
vcvtgt.s32.f32 s2, s18
vcvtgt.s32.f32 s3, s19
itttt gt
vcvtgt.s32.f32 s4, s20
vcvtgt.s32.f32 s5, s21
vcvtgt.s32.f32 s6, s22
vcvtgt.s32.f32 s7, s23
ssat r8, #16, r8
ssat r7, #16, r7
ssat lr, #16, lr
ssat ip, #16, ip
pkhbt r5, r7, r8, lsl #16
pkhbt r6, ip, lr, lsl #16
stmia r0!, {r3-r6}
bgt 1b

vpop {d8-d11}
pop {r4-r8,pc}
endfunc

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