mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-13 21:51:09 +00:00
344 lines
8.5 KiB
C
344 lines
8.5 KiB
C
/*
|
|
===========================================================================
|
|
Copyright (C) 1999-2005 Id Software, Inc.
|
|
|
|
This file is part of Quake III Arena source code.
|
|
|
|
Quake III Arena source code 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.
|
|
|
|
Quake III Arena source code 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 Foobar; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
===========================================================================
|
|
*/
|
|
/**
|
|
* GAS syntax equivalents of the MSVC asm memory calls in common.c
|
|
*
|
|
* The following changes have been made to the asm:
|
|
* 1. Registers are loaded by the inline asm arguments when possible
|
|
* 2. Labels have been changed to local label format (0,1,etc.) to allow inlining
|
|
*
|
|
* HISTORY:
|
|
* AH - Created on 08 Dec 2000
|
|
*/
|
|
|
|
#include <unistd.h> // AH - for size_t
|
|
#include <string.h>
|
|
|
|
// bk001207 - we need something under Linux, too. Mac?
|
|
#if 1 // defined(C_ONLY) // bk010102 - dedicated?
|
|
void Com_Memcpy (void* dest, const void* src, const size_t count) {
|
|
memcpy(dest, src, count);
|
|
}
|
|
|
|
void Com_Memset (void* dest, const int val, const size_t count) {
|
|
memset(dest, val, count);
|
|
}
|
|
|
|
#else
|
|
|
|
typedef enum {
|
|
PRE_READ, // prefetch assuming that buffer is used for reading only
|
|
PRE_WRITE, // prefetch assuming that buffer is used for writing only
|
|
PRE_READ_WRITE // prefetch assuming that buffer is used for both reading and writing
|
|
} e_prefetch;
|
|
|
|
void Com_Prefetch (const void *s, const unsigned int bytes, e_prefetch type);
|
|
|
|
void _copyDWord (unsigned int* dest, const unsigned int constant, const unsigned int count) {
|
|
// MMX version not used on standard Pentium MMX
|
|
// because the dword version is faster (with
|
|
// proper destination prefetching)
|
|
__asm__ __volatile__ (" \
|
|
//mov eax,constant // eax = val \
|
|
//mov edx,dest // dest \
|
|
//mov ecx,count \
|
|
movd %%eax, %%mm0 \
|
|
punpckldq %%mm0, %%mm0 \
|
|
\
|
|
// ensure that destination is qword aligned \
|
|
\
|
|
testl $7, %%edx // qword padding?\
|
|
jz 0f \
|
|
movl %%eax, (%%edx) \
|
|
decl %%ecx \
|
|
addl $4, %%edx \
|
|
\
|
|
0: movl %%ecx, %%ebx \
|
|
andl $0xfffffff0, %%ecx \
|
|
jz 2f \
|
|
jmp 1f \
|
|
.align 16 \
|
|
\
|
|
// funny ordering here to avoid commands \
|
|
// that cross 32-byte boundaries (the \
|
|
// [edx+0] version has a special 3-byte opcode... \
|
|
1: movq %%mm0, 8(%%edx) \
|
|
movq %%mm0, 16(%%edx) \
|
|
movq %%mm0, 24(%%edx) \
|
|
movq %%mm0, 32(%%edx) \
|
|
movq %%mm0, 40(%%edx) \
|
|
movq %%mm0, 48(%%edx) \
|
|
movq %%mm0, 56(%%edx) \
|
|
movq %%mm0, (%%edx)\
|
|
addl $64, %%edx \
|
|
subl $16, %%ecx \
|
|
jnz 1b \
|
|
2: \
|
|
movl %%ebx, %%ecx // ebx = cnt \
|
|
andl $0xfffffff0, %%ecx // ecx = cnt&~15 \
|
|
subl %%ecx, %%ebx \
|
|
jz 6f \
|
|
cmpl $8, %%ebx \
|
|
jl 3f \
|
|
\
|
|
movq %%mm0, (%%edx) \
|
|
movq %%mm0, 8(%%edx) \
|
|
movq %%mm0, 16(%%edx) \
|
|
movq %%mm0, 24(%%edx) \
|
|
addl $32, %%edx \
|
|
subl $8, %%ebx \
|
|
jz 6f \
|
|
\
|
|
3: cmpl $4, %%ebx \
|
|
jl 4f \
|
|
\
|
|
movq %%mm0, (%%edx) \
|
|
movq %%mm0, 8(%%edx) \
|
|
addl $16, %%edx \
|
|
subl $4, %%ebx \
|
|
\
|
|
4: cmpl $2, %%ebx \
|
|
jl 5f \
|
|
movq %%mm0, (%%edx) \
|
|
addl $8, %%edx \
|
|
subl $2, %%ebx \
|
|
\
|
|
5: cmpl $1, %%ebx \
|
|
jl 6f \
|
|
movl %%eax, (%%edx) \
|
|
6: \
|
|
emms \
|
|
"
|
|
: : "a" (constant), "c" (count), "d" (dest)
|
|
: "%ebx", "%edi", "%esi", "cc", "memory");
|
|
}
|
|
|
|
// optimized memory copy routine that handles all alignment
|
|
// cases and block sizes efficiently
|
|
void Com_Memcpy (void* dest, const void* src, const size_t count) {
|
|
Com_Prefetch (src, count, PRE_READ);
|
|
__asm__ __volatile__ (" \
|
|
pushl %%edi \
|
|
pushl %%esi \
|
|
//mov ecx,count \
|
|
cmpl $0, %%ecx // count = 0 check (just to be on the safe side) \
|
|
je 6f \
|
|
//mov edx,dest \
|
|
movl %0, %%ebx \
|
|
cmpl $32, %%ecx // padding only? \
|
|
jl 1f \
|
|
\
|
|
movl %%ecx, %%edi \
|
|
andl $0xfffffe00, %%edi // edi = count&~31 \
|
|
subl $32, %%edi \
|
|
\
|
|
.align 16 \
|
|
0: \
|
|
movl (%%ebx, %%edi, 1), %%eax \
|
|
movl 4(%%ebx, %%edi, 1), %%esi \
|
|
movl %%eax, (%%edx, %%edi, 1) \
|
|
movl %%esi, 4(%%edx, %%edi, 1) \
|
|
movl 8(%%ebx, %%edi, 1), %%eax \
|
|
movl 12(%%ebx, %%edi, 1), %%esi \
|
|
movl %%eax, 8(%%edx, %%edi, 1) \
|
|
movl %%esi, 12(%%edx, %%edi, 1) \
|
|
movl 16(%%ebx, %%edi, 1), %%eax \
|
|
movl 20(%%ebx, %%edi, 1), %%esi \
|
|
movl %%eax, 16(%%edx, %%edi, 1) \
|
|
movl %%esi, 20(%%edx, %%edi, 1) \
|
|
movl 24(%%ebx, %%edi, 1), %%eax \
|
|
movl 28(%%ebx, %%edi, 1), %%esi \
|
|
movl %%eax, 24(%%edx, %%edi, 1) \
|
|
movl %%esi, 28(%%edx, %%edi, 1) \
|
|
subl $32, %%edi \
|
|
jge 0b \
|
|
\
|
|
movl %%ecx, %%edi \
|
|
andl $0xfffffe00, %%edi \
|
|
addl %%edi, %%ebx // increase src pointer \
|
|
addl %%edi, %%edx // increase dst pointer \
|
|
andl $31, %%ecx // new count \
|
|
jz 6f // if count = 0, get outta here \
|
|
\
|
|
1: \
|
|
cmpl $16, %%ecx \
|
|
jl 2f \
|
|
movl (%%ebx), %%eax \
|
|
movl %%eax, (%%edx) \
|
|
movl 4(%%ebx), %%eax \
|
|
movl %%eax, 4(%%edx) \
|
|
movl 8(%%ebx), %%eax \
|
|
movl %%eax, 8(%%edx) \
|
|
movl 12(%%ebx), %%eax \
|
|
movl %%eax, 12(%%edx) \
|
|
subl $16, %%ecx \
|
|
addl $16, %%ebx \
|
|
addl $16, %%edx \
|
|
2: \
|
|
cmpl $8, %%ecx \
|
|
jl 3f \
|
|
movl (%%ebx), %%eax \
|
|
movl %%eax, (%%edx) \
|
|
movl 4(%%ebx), %%eax \
|
|
subl $8, %%ecx \
|
|
movl %%eax, 4(%%edx) \
|
|
addl $8, %%ebx \
|
|
addl $8, %%edx \
|
|
3: \
|
|
cmpl $4, %%ecx \
|
|
jl 4f \
|
|
movl (%%ebx), %%eax // here 4-7 bytes \
|
|
addl $4, %%ebx \
|
|
subl $4, %%ecx \
|
|
movl %%eax, (%%edx) \
|
|
addl $4, %%edx \
|
|
4: // 0-3 remaining bytes \
|
|
cmpl $2, %%ecx \
|
|
jl 5f \
|
|
movw (%%ebx), %%ax // two bytes \
|
|
cmpl $3, %%ecx // less than 3? \
|
|
movw %%ax, (%%edx) \
|
|
jl 6f \
|
|
movb 2(%%ebx), %%al // last byte \
|
|
movb %%al, 2(%%edx) \
|
|
jmp 6f \
|
|
5: \
|
|
cmpl $1, %%ecx \
|
|
jl 6f \
|
|
movb (%%ebx), %%al \
|
|
movb %%al, (%%edx) \
|
|
6: \
|
|
popl %%esi \
|
|
popl %%edi \
|
|
"
|
|
: : "m" (src), "d" (dest), "c" (count)
|
|
: "%eax", "%ebx", "%edi", "%esi", "cc", "memory");
|
|
}
|
|
|
|
void Com_Memset (void* dest, const int val, const size_t count)
|
|
{
|
|
unsigned int fillval;
|
|
|
|
if (count < 8)
|
|
{
|
|
__asm__ __volatile__ (" \
|
|
//mov edx,dest \
|
|
//mov eax, val \
|
|
movb %%al, %%ah \
|
|
movl %%eax, %%ebx \
|
|
andl $0xffff, %%ebx \
|
|
shll $16, %%eax \
|
|
addl %%ebx, %%eax // eax now contains pattern \
|
|
//mov ecx,count \
|
|
cmpl $4, %%ecx \
|
|
jl 0f \
|
|
movl %%eax, (%%edx) // copy first dword \
|
|
addl $4, %%edx \
|
|
subl $4, %%ecx \
|
|
0: cmpl $2, %%ecx \
|
|
jl 1f \
|
|
movw %%ax, (%%edx) // copy 2 bytes \
|
|
addl $2, %%edx \
|
|
subl $2, %%ecx \
|
|
1: cmpl $0, %%ecx \
|
|
je 2f \
|
|
movb %%al, (%%edx) // copy single byte \
|
|
2: \
|
|
"
|
|
: : "d" (dest), "a" (val), "c" (count)
|
|
: "%ebx", "%edi", "%esi", "cc", "memory");
|
|
|
|
return;
|
|
}
|
|
|
|
fillval = val;
|
|
|
|
fillval = fillval|(fillval<<8);
|
|
fillval = fillval|(fillval<<16); // fill dword with 8-bit pattern
|
|
|
|
_copyDWord ((unsigned int*)(dest),fillval, count/4);
|
|
|
|
__asm__ __volatile__ (" // padding of 0-3 bytes \
|
|
//mov ecx,count \
|
|
movl %%ecx, %%eax \
|
|
andl $3, %%ecx \
|
|
jz 1f \
|
|
andl $0xffffff00, %%eax \
|
|
//mov ebx,dest \
|
|
addl %%eax, %%edx \
|
|
movl %0, %%eax \
|
|
cmpl $2, %%ecx \
|
|
jl 0f \
|
|
movw %%ax, (%%edx) \
|
|
cmpl $2, %%ecx \
|
|
je 1f \
|
|
movb %%al, 2(%%edx) \
|
|
jmp 1f \
|
|
0: \
|
|
cmpl $0, %%ecx\
|
|
je 1f\
|
|
movb %%al, (%%edx)\
|
|
1: \
|
|
"
|
|
: : "m" (fillval), "c" (count), "d" (dest)
|
|
: "%eax", "%ebx", "%edi", "%esi", "cc", "memory");
|
|
}
|
|
|
|
void Com_Prefetch (const void *s, const unsigned int bytes, e_prefetch type)
|
|
{
|
|
// write buffer prefetching is performed only if
|
|
// the processor benefits from it. Read and read/write
|
|
// prefetching is always performed.
|
|
|
|
switch (type)
|
|
{
|
|
case PRE_WRITE : break;
|
|
case PRE_READ:
|
|
case PRE_READ_WRITE:
|
|
|
|
__asm__ __volatile__ ("\
|
|
//mov ebx,s\
|
|
//mov ecx,bytes\
|
|
cmpl $4096, %%ecx // clamp to 4kB\
|
|
jle 0f\
|
|
movl $4096, %%ecx\
|
|
0:\
|
|
addl $0x1f, %%ecx\
|
|
shrl $5, %%ecx // number of cache lines\
|
|
jz 2f\
|
|
jmp 1f\
|
|
\
|
|
.align 16\
|
|
1: testb %%al, (%%edx)\
|
|
addl $32, %%edx\
|
|
decl %%ecx\
|
|
jnz 1b\
|
|
2:\
|
|
"
|
|
: : "d" (s), "c" (bytes)
|
|
: "%eax", "%ebx", "%edi", "%esi", "memory", "cc");
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
#endif
|