www.pudn.com > bf533_decoder_mpeg4.rar > cycle_count.asm

/******************************************************************************* 
Copyright(c) 2000 - 2002 Analog Devices. All Rights Reserved. 
Developed by Joint Development Software Application Team, IPDC, Bangalore, India 
for Blackfin DSPs  ( Micro Signal Architecture 1.0 specification). 
    By using this module you agree to the terms of the Analog Devices License 
Agreement for DSP Software.  
********************************************************************************/ 
.extern _f1; 
 
//This function computes cycle count of the function pointed by f1. 
 
.section L1_code; 
.global _Compute_Cycle_Count; 
.align 8; 
_Compute_Cycle_Count: 
        P0.L = _Ret_Add; 
        P0.H = _Ret_Add; 
        R3 = RETS; 
        [P0] = R3; 
 
        P0.L = _Save_R7; 
        P0.H = _Save_R7; 
        [P0] = R7; 
 
        P0.L = _f1; 
        P0.H = _f1; 
        P0 = [P0]; 
 
        NOP;NOP;NOP;NOP; 
 
        R7 = CYCLES; 
        CALL (P0); 
        R0 = CYCLES; 
        NOP; 
        R0 = R0 - R7; 
        R0 += -5; 
 
        P0.L = _Save_R7; 
        P0.H = _Save_R7; 
        R7 = [P0]; 
         
        P0.L = _Ret_Add; 
        P0.H = _Ret_Add; 
        R3 = [P0]; 
        RETS = R3; 
         
        NOP;NOP;NOP;NOP; 
        RTS; 
         
_Compute_Cycle_Count.end: 
         
         
.section data1; 
.align 4; 
        .var _Ret_Add; 
        .var _Save_R7;