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ffmpeg/libavutil/aarch64/asm.S

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aarch64: add cpuflags support for NEON and VFP 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.
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/*
* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
*
Merge commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217' * commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217': aarch64: add cpuflags support for NEON and VFP Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-01-15 13:41:41 +00:00
* This file is part of FFmpeg.
aarch64: add cpuflags support for NEON and VFP 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.
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*
Merge commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217' * commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217': aarch64: add cpuflags support for NEON and VFP Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-01-15 13:41:41 +00:00
* FFmpeg is free software; you can redistribute it and/or
aarch64: add cpuflags support for NEON and VFP 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.
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* 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.
*
Merge commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217' * commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217': aarch64: add cpuflags support for NEON and VFP Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-01-15 13:41:41 +00:00
* FFmpeg is distributed in the hope that it will be useful,
aarch64: add cpuflags support for NEON and VFP 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.
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* 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
Merge commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217' * commit 'b7b17ed66e199afc7246e642bf3b35c3f8eca217': aarch64: add cpuflags support for NEON and VFP Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-01-15 13:41:41 +00:00
* License along with FFmpeg; if not, write to the Free Software
aarch64: add cpuflags support for NEON and VFP 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.
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#ifdef __ELF__
# define ELF
#else
aarch64: Get rid of a stray double space The extra space got included as part of the expansion of ELF, which later interfered with gas-preprocessor which earlier only stripped out leftover lines starting with '#' if the line started with that char. Signed-off-by: Martin Storsjö <martin@martin.st>
2017-10-13 08:10:42 +00:00
# define ELF #
aarch64: add cpuflags support for NEON and VFP 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.
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#endif
build: check if AS supports the '.func' directive Not supported by Clang's integrated assembler. Since it just adds debug information it can safely omitted.
2014-05-30 07:58:43 +00:00
#if HAVE_AS_FUNC
# define FUNC
#else
# define FUNC #
#endif
aarch64: add cpuflags support for NEON and VFP 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.
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.macro function name, export=0, align=2
.macro endfunc
ELF .size \name, . - \name
build: check if AS supports the '.func' directive Not supported by Clang's integrated assembler. Since it just adds debug information it can safely omitted.
2014-05-30 07:58:43 +00:00
FUNC .endfunc
aarch64: add cpuflags support for NEON and VFP 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.
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.purgem endfunc
.endm
.text
.align \align
.if \export
.global EXTERN_ASM\name
aarch64: use EXTERN_ASM consistently for exported symbols Based on e3fec3f095ab5ea08ee662942d98526aaf5e3635 for arm.
2014-02-07 15:05:50 +00:00
ELF .type EXTERN_ASM\name, %function
build: check if AS supports the '.func' directive Not supported by Clang's integrated assembler. Since it just adds debug information it can safely omitted.
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FUNC .func EXTERN_ASM\name
aarch64: add cpuflags support for NEON and VFP 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.
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EXTERN_ASM\name:
aarch64: use EXTERN_ASM consistently for exported symbols Based on e3fec3f095ab5ea08ee662942d98526aaf5e3635 for arm.
2014-02-07 15:05:50 +00:00
.else
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
ELF .type \name, %function
build: check if AS supports the '.func' directive Not supported by Clang's integrated assembler. Since it just adds debug information it can safely omitted.
2014-05-30 07:58:43 +00:00
FUNC .func \name
aarch64: add cpuflags support for NEON and VFP 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.
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\name:
aarch64: use EXTERN_ASM consistently for exported symbols Based on e3fec3f095ab5ea08ee662942d98526aaf5e3635 for arm.
2014-02-07 15:05:50 +00:00
.endif
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
.endm
aarch64: Use .data.rel.ro for const data with relocations This reverts commit c00365b46d464ce47716315c1801818d811bdb9a in addition to using a different section. Signed-off-by: Martin Storsjö <martin@martin.st>
2014-11-16 10:52:21 +00:00
.macro const name, align=2, relocate=0
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
.macro endconst
ELF .size \name, . - \name
.purgem endconst
.endm
aarch64: Use .data.rel.ro for const data with relocations This reverts commit c00365b46d464ce47716315c1801818d811bdb9a in addition to using a different section. Signed-off-by: Martin Storsjö <martin@martin.st>
2014-11-16 10:52:21 +00:00
#if HAVE_SECTION_DATA_REL_RO
.if \relocate
.section .data.rel.ro
.else
.section .rodata
.endif
arm: Create proper .rdata sections for COFF As .rodata isn't one of the default created sections for COFF, it was created as a read-write data section. By using the default .rdata section name for COFF, it automatically becomes a read-only data section. The existing ".section .rodata" works as intended for ELF though. This is based on an original patch and diagnose by Tom Tan <Tom.Tan@microsoft.com>. Signed-off-by: Martin Storsjö <martin@martin.st>
2019-01-11 13:23:16 +00:00
#elif defined(_WIN32)
.section .rdata
aarch64: Use .data.rel.ro for const data with relocations This reverts commit c00365b46d464ce47716315c1801818d811bdb9a in addition to using a different section. Signed-off-by: Martin Storsjö <martin@martin.st>
2014-11-16 10:52:21 +00:00
#elif !defined(__MACH__)
aarch64: add cpuflags support for NEON and VFP 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.
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.section .rodata
aarch64: use MACH-O const data asm directive in const macro
2014-07-23 08:06:15 +00:00
#else
.const_data
#endif
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
.align \align
\name:
.endm
aarch64: Add an offset parameter to the movrel macro With apple tools, the linker fails with errors like these, if the offset is negative: ld: in section __TEXT,__text reloc 8: symbol index out of range for architecture arm64 This is cherry-picked from libav commit c44a8a3eabcd6acd2ba79f32ec8a432e6ebe552c. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
2016-11-14 10:32:24 +00:00
.macro movrel rd, val, offset=0
aarch64: add darwin style PAGE/PAGEOFF relocations
2014-06-01 13:50:42 +00:00
#if CONFIG_PIC && defined(__APPLE__)
aarch64: Add an offset parameter to the movrel macro With apple tools, the linker fails with errors like these, if the offset is negative: ld: in section __TEXT,__text reloc 8: symbol index out of range for architecture arm64 This is cherry-picked from libav commit c44a8a3eabcd6acd2ba79f32ec8a432e6ebe552c. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
2016-11-14 10:32:24 +00:00
.if \offset < 0
aarch64: add darwin style PAGE/PAGEOFF relocations
2014-06-01 13:50:42 +00:00
adrp \rd, \val@PAGE
add \rd, \rd, \val@PAGEOFF
aarch64: Add an offset parameter to the movrel macro With apple tools, the linker fails with errors like these, if the offset is negative: ld: in section __TEXT,__text reloc 8: symbol index out of range for architecture arm64 This is cherry-picked from libav commit c44a8a3eabcd6acd2ba79f32ec8a432e6ebe552c. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
2016-11-14 10:32:24 +00:00
sub \rd, \rd, -(\offset)
.else
adrp \rd, \val+(\offset)@PAGE
add \rd, \rd, \val+(\offset)@PAGEOFF
.endif
aarch64: Fix negative movrel offsets for windows On windows, the offset for the relocation doesn't get stored in the relocation itself, but as an unsigned immediate in the opcode. Therefore, negative offsets has to be handled via a separate sub instruction, just as on MachO. Signed-off-by: Martin Storsjö <martin@martin.st>
2017-07-09 20:52:10 +00:00
#elif CONFIG_PIC && defined(_WIN32)
.if \offset < 0
adrp \rd, \val
add \rd, \rd, :lo12:\val
sub \rd, \rd, -(\offset)
.else
adrp \rd, \val+(\offset)
add \rd, \rd, :lo12:\val+(\offset)
.endif
aarch64: add darwin style PAGE/PAGEOFF relocations
2014-06-01 13:50:42 +00:00
#elif CONFIG_PIC
aarch64: Add parentheses around the offset parameter in movrel This fixes building with clang for linux with PIC enabled. This is cherrypicked from libav commit 8847eeaa141898850381400000fb2b8a7adc7100. Signed-off-by: Martin Storsjö <martin@martin.st>
2017-02-16 07:18:25 +00:00
adrp \rd, \val+(\offset)
add \rd, \rd, :lo12:\val+(\offset)
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
#else
aarch64: Add an offset parameter to the movrel macro With apple tools, the linker fails with errors like these, if the offset is negative: ld: in section __TEXT,__text reloc 8: symbol index out of range for architecture arm64 This is cherry-picked from libav commit c44a8a3eabcd6acd2ba79f32ec8a432e6ebe552c. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
2016-11-14 10:32:24 +00:00
ldr \rd, =\val+\offset
aarch64: add cpuflags support for NEON and VFP 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.
2013-12-10 19:13:32 +00:00
#endif
.endm
aarch64: use EXTERN_ASM consistently for exported symbols Based on e3fec3f095ab5ea08ee662942d98526aaf5e3635 for arm.
2014-02-07 15:05:50 +00:00
#define GLUE(a, b) a ## b
#define JOIN(a, b) GLUE(a, b)
#define X(s) JOIN(EXTERN_ASM, s)