Vector_MulAdd_Accelerator

vector multiplication adder accelerator (using chisel3 and RocketChip RoCC )

2019-08: add float point support

rocc/accelerators/ : some accelerators using rocketchip RoCC.
kernel是向量乘加加速器实现，除此之外还有其他几个测试用的加速器例子供参考
　- 1 kernel/ : simple vector multiplication adder accelerator
　- 2 crc/ : crc checking
　- 3 multState/ : simple scalar multiplication( e.g. a*b=c)
　- 4 sha3/ : sha3 algs
　- 5 spmv/ : sparse matrix multiplication

rocc/sbt/ : sbt unit tests of accelerators 单元测试
rocc/zynq/ : zynq config file
verilator-tests/ : C test cases

Usage:

• 1 download rocketchip RoCC accelerator template:

 git clone https://github.com/meton-robean/deca.git  

• 2 cd deca/
• 3 replace rocc/ and verilator-tests/ in deca with rocc/ and verilator-tests in this repository
• 4 follow the README in deca to test the accelerators

Test:

e.g.if you test kernel accel(simple vector multiplication adder accelerator ):

C test case:

int main() {
    
    //test1
    int a[4] = {1,2,3,4};
    int b[4] = {2,7,1,1};
    int result=1;
    int len =4;
    printf("[INFO] a addr: %x, b_addr: %x\n", a, b);

    asm volatile ("fence");
    ROCC_INSTRUCTION_SS(0, a, b, 0);         //result  a rs1, b rs2
    ROCC_INSTRUCTION_DS(0, result, len,  1); //result, len
    asm volatile ("fence");

    assert(result == 23);
    printf("[INFO] ***** result %d ****** success! \n", result );


    //test2
    int c[8] = {1,2,3,4,5,6,7,8};
    int d[8] = {1,2,1,7,1,1,1,1};
    int result2 =0;
    int len2    =8;

    VEC_VEC_MULADD(c, d, len2, &result2);

    assert(result2 == 62);
    printf("[INFO] ***** result: %d ****** success!\n", result2);

    //test3
    int c2[10] = {1,2,3,4,5,6,7,8, 2, 1};
    int d2[10] = {1,2,1,7,1,1,1,1, 3, 2};
    int result3 =0;
    int len3    =10;

    VEC_VEC_MULADD(c2, d2, len3, &result3);

    assert(result3 == 70);
    printf("[INFO] ***** result: %d ****** success!\n", result3);
    return 0;
}

Result:

  
using random seed 1566300015  
This emulator compiled with JTAG Remote Bitbang client. To enable, use +jtag_rbb_enable=1.  
Listening on port 37035  

//test1---------------------------------------------------  

[INFO] a addr: fee9ae0, b_addr: fee9ad0  
rs1: 000000000fee9ae0, rs2: 000000000fee9ad0  
vec_len:                    4,    rd: 0a  
mem read begin!,  status--** busy reg:1  
vec1:          1           2           3           4   
vec2:          2           7           1           1   
result:         23  
s_compute_done  
[INFO] ***** result 23 ****** success!   

//test2---------------------------------------------------  

rs1: 000000000fee9ab0, rs2: 000000000fee9a90  
vec_len:                    4,    rd: 0a  
mem read begin!,  status--** busy reg:1  
vec1:          1           2           3           4   
vec2:          1           2           1           7   
result:         36  
s_compute_done  
tmp[0]:36  
rs1: 000000000fee9ac0, rs2: 000000000fee9aa0  
vec_len:                    4,    rd: 0a   
mem read begin!,  status--** busy reg:1   
vec1:          5           6           7           8    
vec2:          1           1           1           1   
result:         26   
s_compute_done   
tmp[1]:26  
[INFO] ***** result: 62 ****** success!  

//test3---------------------------------------------------  

rs1: 000000000fee9a60, rs2: 000000000fee9a38  
vec_len:                    4,    rd: 0a  
mem read begin!,  status--** busy reg:1  
vec1:          1           2           3           4   
vec2:          1           2           1           7   
result:         36  
s_compute_done  
tmp[0]:36  
rs1: 000000000fee9a70, rs2: 000000000fee9a48  
vec_len:                    4,    rd: 0a  
mem read begin!,  status--** busy reg:1  
vec1:          5           6           7           8   
vec2:          1           1           1           1   
result:         26  
s_compute_done  
tmp[1]:26  
rs1: 000000000fee9980, rs2: 000000000fee9960  
vec_len:                    4,    rd: 0a  
mem read begin!,  status--** busy reg:1  
vec1:          2           1           0           0    
vec2:          3           2           0           0    
result:          8  
s_compute_done  
tmp[2]:8  
[INFO] ***** result: 70 ****** success!  
Completed after 3156322 cycles  
}