2010-05-18 19:58:33 +04:00
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;
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2016-09-02 00:32:49 +03:00
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; Copyright (c) 2016, Alliance for Open Media. All rights reserved
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2010-05-18 19:58:33 +04:00
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;
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2016-09-02 00:32:49 +03:00
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; This source code is subject to the terms of the BSD 2 Clause License and
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; the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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; was not distributed with this source code in the LICENSE file, you can
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; obtain it at www.aomedia.org/license/software. If the Alliance for Open
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; Media Patent License 1.0 was not distributed with this source code in the
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; PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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;
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2010-05-18 19:58:33 +04:00
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;
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2016-08-31 00:01:10 +03:00
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%include "aom_config.asm"
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2010-05-18 19:58:33 +04:00
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; 32/64 bit compatibility macros
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;
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; In general, we make the source use 64 bit syntax, then twiddle with it using
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; the preprocessor to get the 32 bit syntax on 32 bit platforms.
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;
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%ifidn __OUTPUT_FORMAT__,elf32
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%define ABI_IS_32BIT 1
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%elifidn __OUTPUT_FORMAT__,macho32
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%define ABI_IS_32BIT 1
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%elifidn __OUTPUT_FORMAT__,win32
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%define ABI_IS_32BIT 1
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2012-02-03 08:31:11 +04:00
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%elifidn __OUTPUT_FORMAT__,aout
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%define ABI_IS_32BIT 1
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2010-05-18 19:58:33 +04:00
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%else
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%define ABI_IS_32BIT 0
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%endif
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%if ABI_IS_32BIT
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%define rax eax
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%define rbx ebx
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%define rcx ecx
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%define rdx edx
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%define rsi esi
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%define rdi edi
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%define rsp esp
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%define rbp ebp
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%define movsxd mov
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2010-10-05 01:19:33 +04:00
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%macro movq 2
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%ifidn %1,eax
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movd %1,%2
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%elifidn %2,eax
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movd %1,%2
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%elifidn %1,ebx
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movd %1,%2
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%elifidn %2,ebx
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movd %1,%2
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%elifidn %1,ecx
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movd %1,%2
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%elifidn %2,ecx
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movd %1,%2
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%elifidn %1,edx
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movd %1,%2
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%elifidn %2,edx
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movd %1,%2
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%elifidn %1,esi
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movd %1,%2
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%elifidn %2,esi
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movd %1,%2
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%elifidn %1,edi
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movd %1,%2
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%elifidn %2,edi
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movd %1,%2
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%elifidn %1,esp
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movd %1,%2
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%elifidn %2,esp
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movd %1,%2
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%elifidn %1,ebp
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movd %1,%2
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%elifidn %2,ebp
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movd %1,%2
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%else
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movq %1,%2
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%endif
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%endmacro
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2010-05-18 19:58:33 +04:00
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%endif
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2016-08-23 02:08:15 +03:00
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; LIBAOM_YASM_WIN64
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; Set LIBAOM_YASM_WIN64 if output is Windows 64bit so the code will work if x64
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2013-02-01 03:36:55 +04:00
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; or win64 is defined on the Yasm command line.
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%ifidn __OUTPUT_FORMAT__,win64
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2016-08-23 02:08:15 +03:00
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%define LIBAOM_YASM_WIN64 1
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2013-02-01 03:36:55 +04:00
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%elifidn __OUTPUT_FORMAT__,x64
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2016-08-23 02:08:15 +03:00
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%define LIBAOM_YASM_WIN64 1
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2013-02-01 03:36:55 +04:00
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%else
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2016-08-23 02:08:15 +03:00
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%define LIBAOM_YASM_WIN64 0
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2013-02-01 03:36:55 +04:00
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%endif
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2010-05-18 19:58:33 +04:00
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; sym()
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; Return the proper symbol name for the target ABI.
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;
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; Certain ABIs, notably MS COFF and Darwin MACH-O, require that symbols
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; with C linkage be prefixed with an underscore.
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;
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%ifidn __OUTPUT_FORMAT__,elf32
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%define sym(x) x
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%elifidn __OUTPUT_FORMAT__,elf64
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%define sym(x) x
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2012-09-25 08:37:11 +04:00
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%elifidn __OUTPUT_FORMAT__,elfx32
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%define sym(x) x
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2016-08-23 02:08:15 +03:00
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%elif LIBAOM_YASM_WIN64
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2010-05-18 19:58:33 +04:00
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%define sym(x) x
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%else
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%define sym(x) _ %+ x
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%endif
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2012-05-24 02:52:34 +04:00
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; PRIVATE
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; Macro for the attribute to hide a global symbol for the target ABI.
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; This is only active if CHROMIUM is defined.
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;
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; Chromium doesn't like exported global symbols due to symbol clashing with
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; plugins among other things.
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;
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; Requires Chromium's patched copy of yasm:
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; http://src.chromium.org/viewvc/chrome?view=rev&revision=73761
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; http://www.tortall.net/projects/yasm/ticket/236
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;
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%ifdef CHROMIUM
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%ifidn __OUTPUT_FORMAT__,elf32
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%define PRIVATE :hidden
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%elifidn __OUTPUT_FORMAT__,elf64
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%define PRIVATE :hidden
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2012-09-25 08:37:11 +04:00
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%elifidn __OUTPUT_FORMAT__,elfx32
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%define PRIVATE :hidden
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2016-08-23 02:08:15 +03:00
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%elif LIBAOM_YASM_WIN64
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2012-05-24 02:52:34 +04:00
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%define PRIVATE
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%else
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%define PRIVATE :private_extern
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%endif
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%else
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%define PRIVATE
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%endif
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2010-05-18 19:58:33 +04:00
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; arg()
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; Return the address specification of the given argument
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;
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%if ABI_IS_32BIT
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%define arg(x) [ebp+8+4*x]
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%else
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; 64 bit ABI passes arguments in registers. This is a workaround to get up
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; and running quickly. Relies on SHADOW_ARGS_TO_STACK
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2016-08-23 02:08:15 +03:00
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%if LIBAOM_YASM_WIN64
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2010-05-18 19:58:33 +04:00
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%define arg(x) [rbp+16+8*x]
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%else
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%define arg(x) [rbp-8-8*x]
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%endif
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%endif
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; REG_SZ_BYTES, REG_SZ_BITS
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; Size of a register
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%if ABI_IS_32BIT
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%define REG_SZ_BYTES 4
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%define REG_SZ_BITS 32
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%else
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%define REG_SZ_BYTES 8
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%define REG_SZ_BITS 64
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%endif
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; ALIGN_STACK <alignment> <register>
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; This macro aligns the stack to the given alignment (in bytes). The stack
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; is left such that the previous value of the stack pointer is the first
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; argument on the stack (ie, the inverse of this macro is 'pop rsp.')
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; This macro uses one temporary register, which is not preserved, and thus
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; must be specified as an argument.
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%macro ALIGN_STACK 2
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mov %2, rsp
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and rsp, -%1
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2010-09-15 02:46:37 +04:00
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lea rsp, [rsp - (%1 - REG_SZ_BYTES)]
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2010-05-18 19:58:33 +04:00
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push %2
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%endmacro
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;
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; The Microsoft assembler tries to impose a certain amount of type safety in
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; its register usage. YASM doesn't recognize these directives, so we just
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; %define them away to maintain as much compatibility as possible with the
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; original inline assembler we're porting from.
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;
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%idefine PTR
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%idefine XMMWORD
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%idefine MMWORD
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; PIC macros
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;
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%if ABI_IS_32BIT
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%if CONFIG_PIC=1
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%ifidn __OUTPUT_FORMAT__,elf32
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%define WRT_PLT wrt ..plt
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%macro GET_GOT 1
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extern _GLOBAL_OFFSET_TABLE_
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push %1
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call %%get_got
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2010-09-15 02:46:37 +04:00
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%%sub_offset:
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jmp %%exitGG
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2010-05-18 19:58:33 +04:00
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%%get_got:
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2010-09-15 02:46:37 +04:00
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mov %1, [esp]
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add %1, _GLOBAL_OFFSET_TABLE_ + $$ - %%sub_offset wrt ..gotpc
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ret
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%%exitGG:
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2010-05-18 19:58:33 +04:00
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%undef GLOBAL
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2010-10-05 01:18:58 +04:00
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%define GLOBAL(x) x + %1 wrt ..gotoff
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2010-05-18 19:58:33 +04:00
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%undef RESTORE_GOT
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%define RESTORE_GOT pop %1
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%endmacro
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%elifidn __OUTPUT_FORMAT__,macho32
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%macro GET_GOT 1
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push %1
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call %%get_got
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%%get_got:
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2011-03-05 23:36:40 +03:00
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pop %1
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2010-05-18 19:58:33 +04:00
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%undef GLOBAL
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2011-03-05 23:36:40 +03:00
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%define GLOBAL(x) x + %1 - %%get_got
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2010-05-18 19:58:33 +04:00
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%undef RESTORE_GOT
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%define RESTORE_GOT pop %1
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%endmacro
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%endif
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%endif
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2012-05-24 02:52:34 +04:00
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%ifdef CHROMIUM
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%ifidn __OUTPUT_FORMAT__,macho32
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%define HIDDEN_DATA(x) x:private_extern
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%else
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%define HIDDEN_DATA(x) x
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%endif
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%else
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%define HIDDEN_DATA(x) x
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%endif
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2010-05-18 19:58:33 +04:00
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%else
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%macro GET_GOT 1
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%endmacro
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2010-10-05 01:18:58 +04:00
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%define GLOBAL(x) rel x
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2010-05-18 19:58:33 +04:00
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%ifidn __OUTPUT_FORMAT__,elf64
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%define WRT_PLT wrt ..plt
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2010-07-31 19:12:31 +04:00
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%define HIDDEN_DATA(x) x:data hidden
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2012-09-25 08:37:11 +04:00
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%elifidn __OUTPUT_FORMAT__,elfx32
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%define WRT_PLT wrt ..plt
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%define HIDDEN_DATA(x) x:data hidden
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2013-01-26 03:02:52 +04:00
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%elifidn __OUTPUT_FORMAT__,macho64
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%ifdef CHROMIUM
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%define HIDDEN_DATA(x) x:private_extern
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%else
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%define HIDDEN_DATA(x) x
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%endif
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2010-06-18 06:33:52 +04:00
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%else
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2010-07-31 19:12:31 +04:00
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%define HIDDEN_DATA(x) x
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2010-05-18 19:58:33 +04:00
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%endif
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%endif
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%ifnmacro GET_GOT
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%macro GET_GOT 1
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%endmacro
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2010-10-05 01:18:58 +04:00
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%define GLOBAL(x) x
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2010-05-18 19:58:33 +04:00
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%endif
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%ifndef RESTORE_GOT
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%define RESTORE_GOT
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%endif
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%ifndef WRT_PLT
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%define WRT_PLT
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%endif
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%if ABI_IS_32BIT
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%macro SHADOW_ARGS_TO_STACK 1
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%endm
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%define UNSHADOW_ARGS
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%else
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2016-08-23 02:08:15 +03:00
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%if LIBAOM_YASM_WIN64
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2010-05-18 19:58:33 +04:00
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%macro SHADOW_ARGS_TO_STACK 1 ; argc
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%if %1 > 0
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mov arg(0),rcx
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%endif
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%if %1 > 1
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mov arg(1),rdx
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%endif
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%if %1 > 2
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mov arg(2),r8
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%endif
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%if %1 > 3
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mov arg(3),r9
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%endif
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%endm
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%else
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%macro SHADOW_ARGS_TO_STACK 1 ; argc
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%if %1 > 0
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push rdi
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%endif
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%if %1 > 1
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push rsi
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%endif
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%if %1 > 2
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push rdx
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%endif
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%if %1 > 3
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push rcx
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%endif
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%if %1 > 4
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push r8
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%endif
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%if %1 > 5
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push r9
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%endif
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%if %1 > 6
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2010-06-14 22:07:56 +04:00
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%assign i %1-6
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%assign off 16
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%rep i
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mov rax,[rbp+off]
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2010-05-18 19:58:33 +04:00
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push rax
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2010-06-14 22:07:56 +04:00
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%assign off off+8
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%endrep
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2010-05-18 19:58:33 +04:00
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%endif
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%endm
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%endif
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%define UNSHADOW_ARGS mov rsp, rbp
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%endif
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2011-04-15 18:05:20 +04:00
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; Win64 ABI requires that XMM6:XMM15 are callee saved
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; SAVE_XMM n, [u]
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; store registers 6-n on the stack
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; if u is specified, use unaligned movs.
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; Win64 ABI requires 16 byte stack alignment, but then pushes an 8 byte return
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; value. Typically we follow this up with 'push rbp' - re-aligning the stack -
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; but in some cases this is not done and unaligned movs must be used.
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2016-08-23 02:08:15 +03:00
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%if LIBAOM_YASM_WIN64
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2011-04-15 18:05:20 +04:00
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%macro SAVE_XMM 1-2 a
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%if %1 < 6
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%error Only xmm registers 6-15 must be preserved
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%else
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%assign last_xmm %1
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%define movxmm movdq %+ %2
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%assign xmm_stack_space ((last_xmm - 5) * 16)
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sub rsp, xmm_stack_space
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%assign i 6
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%rep (last_xmm - 5)
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movxmm [rsp + ((i - 6) * 16)], xmm %+ i
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%assign i i+1
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|
%endrep
|
|
|
|
%endif
|
2010-06-11 13:32:28 +04:00
|
|
|
%endmacro
|
|
|
|
%macro RESTORE_XMM 0
|
2011-04-15 18:05:20 +04:00
|
|
|
%ifndef last_xmm
|
|
|
|
%error RESTORE_XMM must be paired with SAVE_XMM n
|
|
|
|
%else
|
|
|
|
%assign i last_xmm
|
|
|
|
%rep (last_xmm - 5)
|
|
|
|
movxmm xmm %+ i, [rsp +((i - 6) * 16)]
|
|
|
|
%assign i i-1
|
|
|
|
%endrep
|
|
|
|
add rsp, xmm_stack_space
|
|
|
|
; there are a couple functions which return from multiple places.
|
|
|
|
; otherwise, we could uncomment these:
|
|
|
|
; %undef last_xmm
|
|
|
|
; %undef xmm_stack_space
|
|
|
|
; %undef movxmm
|
|
|
|
%endif
|
2010-06-11 13:32:28 +04:00
|
|
|
%endmacro
|
|
|
|
%else
|
2011-04-15 18:05:20 +04:00
|
|
|
%macro SAVE_XMM 1-2
|
2010-06-11 13:32:28 +04:00
|
|
|
%endmacro
|
|
|
|
%macro RESTORE_XMM 0
|
|
|
|
%endmacro
|
|
|
|
%endif
|
2010-05-18 19:58:33 +04:00
|
|
|
|
|
|
|
; Name of the rodata section
|
|
|
|
;
|
|
|
|
; .rodata seems to be an elf-ism, as it doesn't work on OSX.
|
|
|
|
;
|
|
|
|
%ifidn __OUTPUT_FORMAT__,macho64
|
|
|
|
%define SECTION_RODATA section .text
|
|
|
|
%elifidn __OUTPUT_FORMAT__,macho32
|
|
|
|
%macro SECTION_RODATA 0
|
|
|
|
section .text
|
|
|
|
%endmacro
|
2012-02-03 08:31:11 +04:00
|
|
|
%elifidn __OUTPUT_FORMAT__,aout
|
|
|
|
%define SECTION_RODATA section .data
|
2010-05-18 19:58:33 +04:00
|
|
|
%else
|
|
|
|
%define SECTION_RODATA section .rodata
|
|
|
|
%endif
|
2010-05-27 16:56:34 +04:00
|
|
|
|
|
|
|
|
|
|
|
; Tell GNU ld that we don't require an executable stack.
|
|
|
|
%ifidn __OUTPUT_FORMAT__,elf32
|
|
|
|
section .note.GNU-stack noalloc noexec nowrite progbits
|
|
|
|
section .text
|
|
|
|
%elifidn __OUTPUT_FORMAT__,elf64
|
|
|
|
section .note.GNU-stack noalloc noexec nowrite progbits
|
|
|
|
section .text
|
2012-09-25 08:37:11 +04:00
|
|
|
%elifidn __OUTPUT_FORMAT__,elfx32
|
|
|
|
section .note.GNU-stack noalloc noexec nowrite progbits
|
|
|
|
section .text
|
2010-05-27 16:56:34 +04:00
|
|
|
%endif
|