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;*****************************************************************************
;* checkasm-a.asm
;*****************************************************************************
;* Copyright (C) 2008 Loren Merritt <lorenm@u.washington.edu>
;*
;* This program is free software; you can redistribute it and/or modify
;* it under the terms of the GNU General Public License as published by
;* the Free Software Foundation; either version 2 of the License, or
;* (at your option) any later version.
;*
;* This program 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 General Public License for more details.
;*
;* You should have received a copy of the GNU General Public License
;* along with this program; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
;*****************************************************************************
%include "x86inc.asm"
SECTION_RODATA
error_message: db "failed to preserve register", 0
%ifdef WIN64
; just random numbers to reduce the chance of incidental match
ALIGN 16
n4: dq 0xa77809bf11b239d1
n5: dq 0x2ba9bf3d2f05b389
x6: ddq 0x79445c159ce790641a1b2550a612b48c
x7: ddq 0x86b2536fcd8cf6362eed899d5a28ddcd
x8: ddq 0x3f2bf84fc0fcca4eb0856806085e7943
x9: ddq 0xd229e1f5b281303facbd382dcf5b8de2
x10: ddq 0xab63e2e11fa38ed971aeaff20b095fd9
x11: ddq 0x77d410d5c42c882d89b0c0765892729a
x12: ddq 0x24b3c1d2a024048bc45ea11a955d8dd5
x13: ddq 0xdd7b8919edd427862e8ec680de14b47c
x14: ddq 0x11e53e2b2ac655ef135ce6888fa02cbf
x15: ddq 0x6de8f4c914c334d5011ff554472a7a10
%endif
SECTION .text
cextern puts
; max number of args used by any x264 asm function.
; (max_args % 4) must equal 3 for stack alignment
%define max_args 11
%ifdef WIN64
;-----------------------------------------------------------------------------
; intptr_t x264_checkasm_call( intptr_t (*func)(), int *ok, ... )
;-----------------------------------------------------------------------------
cglobal x264_checkasm_call, 4,7,16
sub rsp, max_args*8
%assign stack_offset stack_offset+max_args*8
mov r6, r0
mov [rsp+stack_offset+16], r1
mov r0, r2
mov r1, r3
mov r2d, r4m ; FIXME truncates pointer
mov r3d, r5m ; FIXME truncates pointer
%assign i 4
%rep max_args-4
mov r4, [rsp+stack_offset+8+(i+2)*8]
mov [rsp+i*8], r4
%assign i i+1
%endrep
%assign i 6
%rep 16-6
movdqa xmm %+ i, [x %+ i]
%assign i i+1
%endrep
mov r4, [n4]
mov r5, [n5]
call r6
xor r4, [n4]
xor r5, [n5]
or r4, r5
pxor xmm5, xmm5
%assign i 6
%rep 16-6
pxor xmm %+ i, [x %+ i]
por xmm5, xmm %+ i
%assign i i+1
%endrep
packsswb xmm5, xmm5
movq r5, xmm5
or r4, r5
jz .ok
mov r4, rax
lea r0, [error_message]
call puts
mov r1, [rsp+stack_offset+16]
mov dword [r1], 0
mov rax, r4
.ok:
add rsp, max_args*8
%assign stack_offset stack_offset-max_args*8
RET
%elifndef ARCH_X86_64
; just random numbers to reduce the chance of incidental match
%define n3 dword 0x6549315c
%define n4 dword 0xe02f3e23
%define n5 dword 0xb78d0d1d
%define n6 dword 0x33627ba7
;-----------------------------------------------------------------------------
; intptr_t x264_checkasm_call( intptr_t (*func)(), int *ok, ... )
;-----------------------------------------------------------------------------
cglobal x264_checkasm_call, 1,7
mov r3, n3
mov r4, n4
mov r5, n5
mov r6, n6
%rep max_args
push dword [esp+24+max_args*4]
%endrep
call r0
add esp, max_args*4
xor r3, n3
xor r4, n4
xor r5, n5
xor r6, n6
or r3, r4
or r5, r6
or r3, r5
jz .ok
mov r3, eax
lea r1, [error_message]
push r1
call puts
add esp, 4
mov r1, r1m
mov dword [r1], 0
mov eax, r3
.ok:
RET
%endif ; ARCH_X86_64
;-----------------------------------------------------------------------------
; int x264_stack_pagealign( int (*func)(), int align )
;-----------------------------------------------------------------------------
cglobal x264_stack_pagealign, 2,2
push rbp
mov rbp, rsp
and rsp, ~0xfff
sub rsp, r1
call r0
leave
RET
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