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Diffstat (limited to 'sw/test-sha256/test-adder.c')
| -rw-r--r-- | sw/test-sha256/test-adder.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/sw/test-sha256/test-adder.c b/sw/test-sha256/test-adder.c deleted file mode 100644 index 70415d8..0000000 --- a/sw/test-sha256/test-adder.c +++ /dev/null @@ -1,206 +0,0 @@ -//------------------------------------------------------------------------------ -// setup-eim.c -//------------------------------------------------------------------------------ - - -//------------------------------------------------------------------------------ -// Headers -//------------------------------------------------------------------------------ -#include <stdio.h> -#include <stdlib.h> -#include "novena-eim.h" - - -//------------------------------------------------------------------------------ -// Demo Adder -//------------------------------------------------------------------------------ -#define DEMO_ADDER_BASE_ADDR (0x3210) -#define DEMO_ADDER_REG_X (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (0<<2)) -#define DEMO_ADDER_REG_Y (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (1<<2)) -#define DEMO_ADDER_REG_Z (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (2<<2)) -#define DEMO_ADDER_REG_SC (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (3<<2)) - - -//------------------------------------------------------------------------------ -// Prototypes -//------------------------------------------------------------------------------ -unsigned int demo_adder_test_round (unsigned int, unsigned int); -unsigned int lfsr_next_x (unsigned int); -unsigned int lfsr_next_y (unsigned int); - - -//------------------------------------------------------------------------------ -// Testing Parameters -//------------------------------------------------------------------------------ -const int NUM_TEST_ROUNDS = 10000; -const int PRINT_XYZ_VALUES = 1; - - -//------------------------------------------------------------------------------ -int main() -//------------------------------------------------------------------------------ -{ - // try to setup eim (return value should be 1) - printf("Configuring EIM .. "); - int ok = eim_setup(); - if (ok < 1) - { printf("ERROR\n"); - return EXIT_FAILURE; - } - else printf("OK\n"); - - // run test - int i; - unsigned int x = 0x12341234, y = 0xABCDABCD, zyx; - printf("Testing started.\n"); - for (i=0; i<NUM_TEST_ROUNDS; i++) - { - // run another round - unsigned int z = demo_adder_test_round(x, y); - - // calculate correct answer - zyx = x + y; - - // check result - if (z != zyx) - { printf("ERROR: round %10d of %10d: x == 0x%08X, y == 0x%08X, z == 0x%08X [z should be 0x%08X]\n", i+1, NUM_TEST_ROUNDS, x, y, z, zyx); - exit(EXIT_FAILURE); - } - else if (PRINT_XYZ_VALUES) printf("OK: round %10d of %10d: x == 0x%08X, y == 0x%08X, z == 0x%08X\n", i+1, NUM_TEST_ROUNDS, x, y, z); - - // update input values - x = lfsr_next_x(x); - y = lfsr_next_x(y); - } - - // ok - printf("Testing completed successfully.\n"); - - // done - return EXIT_SUCCESS; -} - - -//------------------------------------------------------------------------------ -unsigned int demo_adder_test_round(unsigned int x, unsigned int y) -//------------------------------------------------------------------------------ -{ - // write x - eim_write_32(DEMO_ADDER_REG_X, &x); - - // write y - eim_write_32(DEMO_ADDER_REG_Y, &y); - - /* To make adder calculate something we need to change its control register, - * so we read it, increment and write back. Control register is in the lower 16 bits. - */ - unsigned int ctl; - eim_read_32(DEMO_ADDER_REG_SC, &ctl); - ctl += 1; - ctl &= 0x0000FFFF; - eim_write_32(DEMO_ADDER_REG_SC, &ctl); - - /* When adder is done, it will write new control value into its status register. Adder has 1-cycle latency - * which is very small, we don't even need to poll, just check that status was updated. Status register is - * in the upper 16 bits. - */ - unsigned int sts; - eim_read_32(DEMO_ADDER_REG_SC, &sts); - sts >>= 16; - if (sts != ctl) - { printf("ERROR: Adder timeout!\n"); - exit(EXIT_FAILURE); - } - - // read z - unsigned int z; - eim_read_32(DEMO_ADDER_REG_Z, &z); - - // uncomment to trigger an error - /** - z++; - **/ - - // done - return z; -} - - -//------------------------------------------------------------------------------ -unsigned int lfsr_next_x(unsigned int value) -//------------------------------------------------------------------------------ -{ - // - // [32, 31, 29, 28, 27, 25, 24, 23, 21, 19, 17, 14, 10, 6, 4, 2] - // 0 1 3 4 5 7 8 9 11 13 15 18 22 24 28 30 - // - - unsigned int carry = 0; - - carry ^= (value >> 0); - carry ^= (value >> 1); - carry ^= (value >> 3); - carry ^= (value >> 4); - - carry ^= (value >> 5); - carry ^= (value >> 7); - carry ^= (value >> 8); - carry ^= (value >> 9); - - carry ^= (value >> 11); - carry ^= (value >> 13); - carry ^= (value >> 15); - carry ^= (value >> 18); - - carry ^= (value >> 22); - carry ^= (value >> 24); - carry ^= (value >> 28); - carry ^= (value >> 30); - - value >>= 1, value |= (carry << 31); - - return value; -} - - -//------------------------------------------------------------------------------ -unsigned int lfsr_next_y(unsigned int value) -//------------------------------------------------------------------------------ -{ - // - // [32, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 1] - // 0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31 - // - - unsigned int carry = 0; - - carry ^= (value >> 0); - carry ^= (value >> 15); - carry ^= (value >> 16); - carry ^= (value >> 17); - - carry ^= (value >> 18); - carry ^= (value >> 19); - carry ^= (value >> 20); - carry ^= (value >> 21); - - carry ^= (value >> 22); - carry ^= (value >> 23); - carry ^= (value >> 24); - carry ^= (value >> 25); - - carry ^= (value >> 26); - carry ^= (value >> 27); - carry ^= (value >> 28); - carry ^= (value >> 31); - - value >>= 1, value |= (carry << 31); - - return value; -} - - - -//------------------------------------------------------------------------------ -// End-of-File -//------------------------------------------------------------------------------ |