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aarch64: add cpuflags support for NEON and VFP

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NEON and VFP are currently mandatory for all ARMv8 profiles. Both are
handled as extensions as far as cpuflags are concerned. This is
consistent with handling x86_64 which always has SSE2, but still
handles it as an extension.
pull/53/head
Janne Grunau 11 years ago
parent 1e9265cd8f
commit b7b17ed66e
7 changed files with 150 additions and 7 deletions
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  1. 17
      configure
  2. 1
      libavutil/aarch64/Makefile
  3. 63
      libavutil/aarch64/asm.S
  4. 27
      libavutil/aarch64/cpu.c
  5. 29
      libavutil/aarch64/cpu.h
  6. 19
      libavutil/cpu.c
  7. 1
      libavutil/cpu_internal.h

17
configure vendored
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@ -1543,8 +1543,8 @@ CMDLINE_APPEND="
armv5te_deps="arm"
armv6_deps="arm"
armv6t2_deps="arm"
neon_deps="arm"
vfp_deps="arm"
neon_deps_any="aarch64 arm"
vfp_deps_any="aarch64 arm"
vfpv3_deps="vfp"
map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
@ -3596,7 +3596,14 @@ od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
check_inline_asm inline_asm_labels '"1:\n"'
if enabled alpha; then
if enabled aarch64; then
# internal assembler in clang 3.3 does not support this instruction
enabled neon && check_insn neon 'ext v0.8B, v0.8B, v1.8B, #1'
enabled vfp && check_insn vfp 'fmadd d0, d0, d1, d2'
map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
elif enabled alpha; then
check_cflags -mieee
@ -4250,6 +4257,10 @@ if enabled x86; then
echo "EBX available ${ebx_available-no}"
echo "EBP available ${ebp_available-no}"
fi
if enabled aarch64; then
echo "NEON enabled ${neon-no}"
echo "VFP enabled ${vfp-no}"
fi
if enabled arm; then
echo "ARMv5TE enabled ${armv5te-no}"
echo "ARMv6 enabled ${armv6-no}"

1
libavutil/aarch64/Makefile
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@ -0,0 +1 @@
OBJS += aarch64/cpu.o

63
libavutil/aarch64/asm.S
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@ -0,0 +1,63 @@
/*
* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
*
* 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"
#ifdef __ELF__
# define ELF
#else
# define ELF //
#endif
.macro function name, export=0, align=2
.macro endfunc
ELF .size \name, . - \name
.endfunc
.purgem endfunc
.endm
.text
.align \align
.if \export
.global EXTERN_ASM\name
EXTERN_ASM\name:
.endif
ELF .type \name, %function
.func \name
\name:
.endm
.macro const name, align=2
.macro endconst
ELF .size \name, . - \name
.purgem endconst
.endm
.section .rodata
.align \align
\name:
.endm
.macro movrel rd, val
#if CONFIG_PIC
adrp \rd, #:pg_hi21:\val
add \rd, \rd, #:lo12:\val
#else
ldr \rd, =\val
#endif
.endm

27
libavutil/aarch64/cpu.c
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@ -0,0 +1,27 @@
/*
* 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 "libavutil/cpu.h"
#include "libavutil/cpu_internal.h"
#include "config.h"
int ff_get_cpu_flags_aarch64(void)
{
return AV_CPU_FLAG_NEON * HAVE_NEON |
AV_CPU_FLAG_VFP * HAVE_VFP;
}

29
libavutil/aarch64/cpu.h
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@ -0,0 +1,29 @@
/*
* 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
*/
#ifndef AVUTIL_AARCH64_CPU_H
#define AVUTIL_AARCH64_CPU_H
#include "config.h"
#include "libavutil/cpu.h"
#include "libavutil/cpu_internal.h"
#define have_neon(flags) CPUEXT(flags, NEON)
#define have_vfp(flags) CPUEXT(flags, VFP)
#endif /* AVUTIL_AARCH64_CPU_H */

19
libavutil/cpu.c
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@ -51,9 +51,14 @@ int av_get_cpu_flags(void)
if (checked)
return flags;
if (ARCH_ARM) flags = ff_get_cpu_flags_arm();
if (ARCH_PPC) flags = ff_get_cpu_flags_ppc();
if (ARCH_X86) flags = ff_get_cpu_flags_x86();
if (ARCH_AARCH64)
flags = ff_get_cpu_flags_aarch64();
if (ARCH_ARM)
flags = ff_get_cpu_flags_arm();
if (ARCH_PPC)
flags = ff_get_cpu_flags_ppc();
if (ARCH_X86)
flags = ff_get_cpu_flags_x86();
flags &= cpuflags_mask;
checked = 1;
@ -114,6 +119,9 @@ int av_parse_cpu_flags(const char *s)
{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
{ "vfpv3", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFPV3 }, .unit = "flags" },
{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
#elif ARCH_AARCH64
{ "neon", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_NEON }, .unit = "flags" },
{ "vfp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_VFP }, .unit = "flags" },
#endif
{ NULL },
};
@ -170,7 +178,10 @@ static const struct {
int flag;
const char *name;
} cpu_flag_tab[] = {
#if ARCH_ARM
#if ARCH_AARCH64
{ AV_CPU_FLAG_NEON, "neon" },
{ AV_CPU_FLAG_VFP, "vfp" },
#elif ARCH_ARM
{ AV_CPU_FLAG_ARMV5TE, "armv5te" },
{ AV_CPU_FLAG_ARMV6, "armv6" },
{ AV_CPU_FLAG_ARMV6T2, "armv6t2" },

1
libavutil/cpu_internal.h
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@ -26,6 +26,7 @@
#define CPUEXT(flags, cpuext) CPUEXT_SUFFIX(flags, , cpuext)
int ff_get_cpu_flags_aarch64(void);
int ff_get_cpu_flags_arm(void);
int ff_get_cpu_flags_ppc(void);
int ff_get_cpu_flags_x86(void);

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