Return to x86.c CVS log

Up to [Quake II] / quake2 / client

Annotation of quake2/client/x86.c, revision 1.1

1.1     ! root        1: #include <stdlib.h>
        !             2: #include "client.h"
        !             3: 
        !             4: #if id386
        !             5: 
        !             6: static unsigned long bias;
        !             7: static unsigned long *histogram;
        !             8: static unsigned long start, range;
        !             9: static unsigned long bias;
        !            10: 
        !            11: __declspec( naked ) void x86_TimerStart( void )
        !            12: {
        !            13:        __asm _emit 0fh
        !            14:        __asm _emit 31h
        !            15:        __asm mov  start, eax
        !            16:        __asm ret
        !            17: }
        !            18: 
        !            19: __declspec( naked ) void x86_TimerStop( void )
        !            20: {
        !            21:        __asm push edi
        !            22:        __asm mov edi, histogram
        !            23:        __asm _emit 0fh
        !            24:        __asm _emit 31h
        !            25:        __asm sub eax, start
        !            26:        __asm sub eax, bias
        !            27:        __asm js discard
        !            28:        __asm cmp eax, range
        !            29:        __asm jge  discard
        !            30:        __asm lea edi, [edi + eax*4]
        !            31:        __asm inc dword ptr [edi]
        !            32: discard:
        !            33:        __asm pop edi
        !            34:        __asm ret
        !            35: }
        !            36: 
        !            37: #pragma warning( disable: 4035 )
        !            38: static __declspec( naked ) unsigned long x86_TimerStopBias( void )
        !            39: {
        !            40:        __asm push edi
        !            41:        __asm mov edi, histogram
        !            42:        __asm _emit 0fh
        !            43:        __asm _emit 31h
        !            44:        __asm sub eax, start
        !            45:        __asm pop edi
        !            46:        __asm ret
        !            47: }
        !            48: #pragma warning( default:4035 )
        !            49: 
        !            50: void x86_TimerInit( unsigned long smallest, unsigned length )
        !            51: {
        !            52:        int i;
        !            53:        unsigned long biastable[100];
        !            54: 
        !            55:        range = length;
        !            56:        bias = 10000;
        !            57: 
        !            58:        for ( i = 0; i < 100; i++ )
        !            59:        {
        !            60:                x86_TimerStart();
        !            61:                biastable[i] = x86_TimerStopBias();
        !            62: 
        !            63:                if ( bias > biastable[i] )
        !            64:                        bias = biastable[i];
        !            65:        }
        !            66: 
        !            67:        bias += smallest;
        !            68:        histogram = Z_Malloc( range * sizeof( unsigned long ) );
        !            69: }
        !            70: 
        !            71: unsigned long *x86_TimerGetHistogram( void )
        !            72: {
        !            73:        return histogram;
        !            74: }
        !            75: 
        !            76: #endif

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.