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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-02-22 11:43:39 +08:00
parent 418a26a060
commit c18eea9c62
12 changed files with 7939 additions and 7371 deletions
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5815
memtest/.build/memtest.asc
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memtest/.build/memtest.json
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memtest/mem.init
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memtest/memtest.v
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@ -23,7 +23,7 @@ module memtest (
assign clk = clkosc;
initial begin
$readmemh("empty.init", mem);
$readmemh("mem.init", mem);
end
always @(posedge clk) begin

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memtest/top.rpt
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output.txt
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samerand
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samerand.c
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@ -1,24 +1,32 @@
#include <stdio.h>
#include <stdint.h>
uint32_t polynomial = 0x04C11DB7;
static uint32_t rand_step(uint32_t input) {
int i;
uint32_t output = input + 1;
for (i = 0; i < 32; i++) {
if (output & 0x80000000)
output ^= polynomial;
output = output << 1;
uint32_t xorshift32(uint32_t x)
{
/* Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs" */
x = x ^ (x << 13);
x = x ^ (x >> 17);
x = x ^ (x << 5);
return x;
}
return output;
uint32_t get_rand(uint32_t x) {
uint32_t out = 0;
int i;
for (i = 0; i < 32; i++) {
x = xorshift32(x);
if ((x & 1) == 1)
out = out | (1<< i);
}
return out;
}
int main(int argc, char **argv) {
int i;
uint32_t init = 0;
for (i = 0; i < 256; i++) {
init = rand_step(init);
uint32_t init = 1;
for (i = 0; i < 2048; i++) {
init = get_rand(init);
printf("%08x\n", init);
}

26
samerand.py
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@ -1,19 +1,27 @@
#!/usr/bin/env python3
# World's worst random number generator
def rand_step(inp):
polynomial = 0x04C11DB7
output = inp + 1
def xorshift32(x):
x = x ^ (x << 13) & 0xffffffff
x = x ^ (x >> 17) & 0xffffffff
x = x ^ (x << 5) & 0xffffffff
return x & 0xffffffff
def get_rand(x):
out = 0
for i in range(32):
if output & 0x80000000:
output ^= polynomial
output = (output << 1) & 0xffffffff
return output & 0xffffffff
x = xorshift32(x)
if (x & 1) == 1:
out = out | (1 << i)
return out & 0xffffffff
def get_bit(x):
return (256 * (x & 7)) + (x >> 3)
def main():
init = 0
init = 1
for i in range(20):
init = rand_step(init)
init = get_rand(init)
print("{:08x}".format(init))
main()

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xform
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xform.c
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@ -1,35 +1,61 @@
#include <stdio.h>
#include <stdint.h>
#include <assert.h>
// bit 0 = input[1792] & (1 << 31)
// bit 1 = input[1792] & (1 << 30)
// bit 2 = input[1536] & (1 << 31)
// bit 3 = input[1536] & (1 << 30)
// bit 4 = input[1280] & (1 << 31)
// bit 5 = input[1280] & (1 << 30)
// bit 6 = input[1024] & (1 << 31)
// bit 7 = input[1024] & (1 << 30)
// bit 8 = input[768] & (1 << 31)
// bit 9 = input[768] & (1 << 30)
// bit 10 = input[512] & (1 << 31)
// bit 11 = input[512] & (1 << 30)
// bit 12 = input[256] & (1 << 31)
// bit 13 = input[256] & (1 << 30)
// bit 14 = input[0] & (1 << 31)
// bit 15 = input[0] & (1 << 30)
/*
bit 0 -> bit 7
bit 1 -> bit 15
bit 8192 -> bit 6
bit 8193 -> bit 14
bit 16384 -> bit 5
bit 16385 -> Bit 13
bit 24576 -> bit 4
bit 24577 -> bit 12
bit 32768 -> bit 3
bit 32769 -> bit 11
bit 40960 -> bit 2
bit 40961 -> bit 10
bit 49152 -> bit 1
bit 49153 -> Bit 9
bit 57344 -> bit 0
bit 57345 -> bit 8
uint32_t polynomial = 0x04C11DB7;
static uint32_t rand_step(uint32_t input)
bit 0 <- 0
bit 1 <- 8192
bit 2 <- 16384
bit 3 <- 24576
bit 4 <- 32768
bit 5 <- 40960
bit 6 <- 49152
bit 7 <- 57344
bit 8 <- 8193
bit 9 <- 16385
bit 10 <- 24577
bit 11 <- 32769
bit 12 <- 40961
bit 13 <- 1281
bit 14 <- 49153
bit 15 <- 57345
*/
uint32_t xorshift32(uint32_t x)
{
int i;
uint32_t output = input + 1;
for (i = 0; i < 32; i++)
{
if (output & 0x80000000)
output ^= polynomial;
output = output << 1;
/* Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs" */
x = x ^ (x << 13);
x = x ^ (x >> 17);
x = x ^ (x << 5);
return x;
}
return output;
uint32_t get_rand(uint32_t x) {
uint32_t out = 0;
int i;
for (i = 0; i < 32; i++) {
x = xorshift32(x);
if ((x & 1) == 1)
out = out | (1<< i);
}
return out;
}
static uint8_t get_bit(uint32_t *field, int offset)
@ -69,9 +95,16 @@ static uint16_t reverse_u16(uint16_t nonreversed)
return reversed;
}
static uint32_t get_bit_offset(int bit) {
return (8192 * (bit & 7)) + (bit >> 3);
}
int main(int argc, char **argv)
{
int i;
for (i = 0; i < 32; i++) {
printf("bit offset %d: %d\n", i, get_bit_offset(i));
}
// uint32_t test_1[] = {1};
// uint32_t test_2[] = {0, 1};
// uint32_t test_3[] = {2, 0};
@ -94,48 +127,58 @@ int main(int argc, char **argv)
// printf("test_4: bit %d set\n", i);
// }
uint32_t input[256];
uint32_t output[256] = {};
uint32_t input[2048] = {};
uint32_t output[2048] = {};
uint32_t init = 0;
uint32_t init = 1;
for (i = 0; i < sizeof(input) / 4; i++)
{
init = rand_step(init);
init = get_rand(init);
input[i] = init;
}
// print_hex(input, sizeof(input), 0);
// return;
uint16_t *o16 = (uint16_t *)output;
uint8_t *i8 = (uint8_t *)input;
for (i = 0; i < sizeof(input) / 2; i++)
for (i = 0; i < sizeof(input) * 8; i++)
{
int j;
for (j = 0; j < 16; j++)
{
// printf("o16[%d] |= (!!(i8[1792+%d] & (1 << %d)) << 0;\n", i, i, 2*(15-j)+1);
o16[i] |= (!!(i8[1792+i] & (1 << 2*(15-j)+1))) << 0;
o16[i] |= (!!(i8[1792+i] & (1 << 2*(15-j)+0))) << 1;
o16[i] |= (!!(i8[1536+i] & (1 << 2*(15-j)+1))) << 2;
o16[i] |= (!!(i8[1536+i] & (1 << 2*(15-j)+0))) << 3;
o16[i] |= (!!(i8[1280+i] & (1 << 2*(15-j)+1))) << 4;
o16[i] |= (!!(i8[1280+i] & (1 << 2*(15-j)+0))) << 5;
o16[i] |= (!!(i8[1024+i] & (1 << 2*(15-j)+1))) << 6;
o16[i] |= (!!(i8[1024+i] & (1 << 2*(15-j)+0))) << 7;
o16[i] |= (!!(i8[768+i] & (1 << 2*(15-j)+1))) << 8;
o16[i] |= (!!(i8[768+i] & (1 << 2*(15-j)+0))) << 9;
o16[i] |= (!!(i8[512+i] & (1 << 2*(15-j)+1))) << 10;
o16[i] |= (!!(i8[512+i] & (1 << 2*(15-j)+0))) << 11;
o16[i] |= (!!(i8[256+i] & (1 << 2*(15-j)+1))) << 12;
o16[i] |= (!!(i8[256+i] & (1 << 2*(15-j)+0))) << 13;
o16[i] |= (!!(i8[0+i] & (1 << 2*(15-j)+1))) << 14;
o16[i] |= (!!(i8[0+i] & (1 << 2*(15-j)+0))) << 15;
// o16[0] = i
// if (get_bit(input, i * 16 + j))
// set_bit(output, j * 256 + i);
// else
// clear_bit(output, j * 256 + i);
}
int bit;
assert(get_bit_offset(i) < sizeof(output) * 8);
bit = get_bit(input, get_bit_offset(i));
// bit = get_bit(input, i);
// if (bit)
// printf("bit %d is set\n", i);
// int xform = ((i * 2048) + ((i * 2048) >> 16)) & 0xffff;
// printf("%d\n", xform);
// assert(xform < sizeof(output) * 8);
if (bit)
set_bit(output, i);
// set_bit(output, get_bit_offset(i));
// int j;
// for (j = 0; j < 16; j++)
// {
// // printf("o16[%d] |= (!!(i8[1792+%d] & (1 << %d)) << 0;\n", i, i, 2*(15-j)+1);
// o16[i] |= (!!(i8[1792+i] & (1 << 2*(15-j)+1))) << 0;
// o16[i] |= (!!(i8[1792+i] & (1 << 2*(15-j)+0))) << 1;
// o16[i] |= (!!(i8[1536+i] & (1 << 2*(15-j)+1))) << 2;
// o16[i] |= (!!(i8[1536+i] & (1 << 2*(15-j)+0))) << 3;
// o16[i] |= (!!(i8[1280+i] & (1 << 2*(15-j)+1))) << 4;
// o16[i] |= (!!(i8[1280+i] & (1 << 2*(15-j)+0))) << 5;
// o16[i] |= (!!(i8[1024+i] & (1 << 2*(15-j)+1))) << 6;
// o16[i] |= (!!(i8[1024+i] & (1 << 2*(15-j)+0))) << 7;
// o16[i] |= (!!(i8[768+i] & (1 << 2*(15-j)+1))) << 8;
// o16[i] |= (!!(i8[768+i] & (1 << 2*(15-j)+0))) << 9;
// o16[i] |= (!!(i8[512+i] & (1 << 2*(15-j)+1))) << 10;
// o16[i] |= (!!(i8[512+i] & (1 << 2*(15-j)+0))) << 11;
// o16[i] |= (!!(i8[256+i] & (1 << 2*(15-j)+1))) << 12;
// o16[i] |= (!!(i8[256+i] & (1 << 2*(15-j)+0))) << 13;
// o16[i] |= (!!(i8[0+i] & (1 << 2*(15-j)+1))) << 14;
// o16[i] |= (!!(i8[0+i] & (1 << 2*(15-j)+0))) << 15;
// // o16[0] = i
// // if (get_bit(input, i * 16 + j))
// // set_bit(output, j * 256 + i);
// // else
// // clear_bit(output, j * 256 + i);
// }
}
// uint8_t *o8 = (uint8_t *)output;
@ -145,9 +188,13 @@ int main(int argc, char **argv)
// for (i = 0; i < sizeof(output)/4; i++)
// o16[i] = reverse_u16(o16[i]);
print_hex(output, sizeof(output), 0);
// for (i = 0; i < 2047; i++)
// printf("00000000\n");
// print_hex(output, sizeof(output), 0);
FILE *infile = fopen("infile.txt", "w");
FILE *outfile = fopen("outfile.txt", "w");
for (i = 0; i < sizeof(input)/4; i++) {
fprintf(infile, "%08x\n", input[i]);
fprintf(outfile, "%08x\n", output[i]);
}
return 0;
}