cycle_count.asm

blankfin 中对iir功能进行测试

/*******************************************************************************
Copyright(c) 2000 - 2003 Analog Devices. All Rights Reserved.
Developed by Blackfin DSP software Group, IPDC, Bangalore, India
for Blackfin DSPs.
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;
        
.section data1;
.align 4;
        .var _Ret_Add;
        .var _Save_R7;