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neorv32/sw/example/floating_point_test/main.c

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2024-02-24 08:25:27 +00:00
// #################################################################################################
// # << NEORV32 - RISC-V Single-Precision Floating-Point 'Zfinx' Extension Verification Program >> #
// # ********************************************************************************************* #
// # BSD 3-Clause License #
// # #
// # Copyright (c) 2023, Stephan Nolting. All rights reserved. #
// # #
// # Redistribution and use in source and binary forms, with or without modification, are #
// # permitted provided that the following conditions are met: #
// # #
// # 1. Redistributions of source code must retain the above copyright notice, this list of #
// # conditions and the following disclaimer. #
// # #
// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
// # conditions and the following disclaimer in the documentation and/or other materials #
// # provided with the distribution. #
// # #
// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
// # endorse or promote products derived from this software without specific prior written #
// # permission. #
// # #
// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
// # OF THE POSSIBILITY OF SUCH DAMAGE. #
// # ********************************************************************************************* #
// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
// #################################################################################################
/**********************************************************************//**
* @file floating_point_test/main.c
* @author Stephan Nolting
* @brief Verification program for the NEORV32 'Zfinx' extension (floating-point in x registers) using
* pseudo-random data as input; compares results from hardware against pure-sw reference functions.
**************************************************************************/
#include <neorv32.h>
#include <float.h>
#include <math.h>
#include "neorv32_zfinx_extension_intrinsics.h"
#ifdef NAN
/* NAN is supported */
#else
#warning NAN macro not supported!
#endif
#ifdef INFINITY
/* INFINITY is supported */
#else
#warning INFINITY macro not supported!
#endif
/**********************************************************************//**
* @name User configuration
**************************************************************************/
/**@{*/
/** UART BAUD rate */
#define BAUD_RATE (19200)
//** Number of test cases for each instruction */
#define NUM_TEST_CASES (1000000)
//** Silent mode (only show actual errors when != 0) */
#define SILENT_MODE (1)
//** Run FPU CSR tests when != 0 */
#define RUN_CSR_TESTS (1)
//** Run FPU exception tests when != 0 */
#define RUN_EXC_TESTS (1)
//** Run conversion tests when != 0 */
#define RUN_CONV_TESTS (1)
//** Run add/sub tests when != 0 */
#define RUN_ADDSUB_TESTS (1)
//** Run multiplication tests when != 0 */
#define RUN_MUL_TESTS (1)
//** Run min/max tests when != 0 */
#define RUN_MINMAX_TESTS (1)
//** Run comparison tests when != 0 */
#define RUN_COMPARE_TESTS (1)
//** Run sign-injection tests when != 0 */
#define RUN_SGNINJ_TESTS (1)
//** Run classify tests when != 0 */
#define RUN_CLASSIFY_TESTS (1)
//** Run unsupported instructions tests when != 0 */
#define RUN_UNAVAIL_TESTS (1)
//** Run average instruction execution time test when != 0 */
#define RUN_TIMING_TESTS (0)
/**@}*/
/**********************************************************************//**
* @name Special floating-point encodings
**************************************************************************/
/**@{*/
#define FLOAT32_SNAN ( (uint32_t)(0x7fa00000U) )
#define FLOAT32_PMIN ( (uint32_t)(0x00800000U) )
#define FLOAT32_PMAX ( (uint32_t)(0x7f7fffffU) )
/**@}*/
// Prototypes
uint32_t get_test_vector(void);
uint32_t xorshift32(void);
uint32_t verify_result(uint32_t num, uint32_t opa, uint32_t opb, uint32_t ref, uint32_t res);
void print_report(uint32_t num_err);
/**********************************************************************//**
* Main function; test all available operations of the NEORV32 'Zfinx'
* extensions using floating-point * hardware intrinsics and software-only
* reference functions (emulation).
*
* @note This program requires the Zfinx CPU extension.
*
* @return 0 if execution was successful
**************************************************************************/
int main() {
uint32_t err_cnt = 0;
uint32_t err_cnt_total = 0;
uint32_t test_cnt = 0;
uint32_t i = 0;
float_conv_t opa;
float_conv_t opb;
float_conv_t res_hw;
float_conv_t res_sw;
// setup UART at default baud rate, no interrupts
neorv32_uart0_setup(BAUD_RATE, 0);
// capture all exceptions and give debug info via UART
neorv32_rte_setup();
// check if Zfinx extension is implemented at all
if ((neorv32_cpu_csr_read(CSR_MXISA) & (1<<CSR_MXISA_ZFINX)) == 0) {
neorv32_uart0_puts("Error! <Zfinx> extension not synthesized!\n");
return 1;
}
// Disable compilation by default
#ifndef RUN_CHECK
#warning Program HAS NOT BEEN COMPILED! Use >>make USER_FLAGS+=-DRUN_CHECK clean_all exe<< to compile it.
// inform the user if you are actually executing this
neorv32_uart0_printf("ERROR! Program has not been compiled. Use >>make USER_FLAGS+=-DRUN_CHECK clean_all exe<< to compile it.\n");
return 1;
#endif
// intro
neorv32_uart0_printf("<<< Zfinx extension test >>>\n");
#if (SILENT_MODE != 0)
neorv32_uart0_printf("SILENT_MODE enabled (only showing actual errors)\n");
#endif
neorv32_uart0_printf("Test cases per instruction: %u\n", (uint32_t)NUM_TEST_CASES);
neorv32_uart0_printf("NOTE: The NEORV32 FPU does not support subnormal numbers yet. Subnormal numbers are flushed to zero.\n\n");
// ----------------------------------------------------------------------------
// CSR Read/Write Tests
// ----------------------------------------------------------------------------
#if (RUN_CSR_TESTS != 0)
neorv32_uart0_printf("\n#%u: FFLAGS CSR...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector() & 0x1F;
neorv32_cpu_csr_write(CSR_FFLAGS, opa.binary_value);
res_hw.binary_value = neorv32_cpu_csr_read(CSR_FFLAGS);
res_sw.binary_value = opa.binary_value;
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FRM CSR...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector() & 0x07;
neorv32_cpu_csr_write(CSR_FRM, opa.binary_value);
res_hw.binary_value = neorv32_cpu_csr_read(CSR_FRM);
res_sw.binary_value = opa.binary_value;
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FCSR CSR...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector() & 0xFF;
neorv32_cpu_csr_write(CSR_FCSR, opa.binary_value);
res_hw.binary_value = neorv32_cpu_csr_read(CSR_FCSR);
res_sw.binary_value = opa.binary_value;
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// CSR Exception Tests
// ----------------------------------------------------------------------------
#if (RUN_EXC_TESTS != 0)
neorv32_uart0_printf("\n#%u: FFLAGS.NX (inexact)... <WORK IN PROGRESS>\n", test_cnt);
test_cnt++;
neorv32_uart0_printf("\n#%u: FFLAGS.DZ (divide by zero)... DIVISON NOT SUPPORTED!\n", test_cnt);
test_cnt++;
neorv32_uart0_printf("\n#%u: FFLAGS.UF (underflow)... <WORK IN PROGRESS>\n", test_cnt);
test_cnt++;
neorv32_uart0_printf("\n#%u: FFLAGS.OV (overflow)... <WORK IN PROGRESS>\n", test_cnt);
test_cnt++;
neorv32_uart0_printf("\n#%u: FFLAGS.NV (invalid operation)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
neorv32_cpu_csr_write(CSR_FFLAGS, 0);
opa.binary_value = FLOAT32_SNAN; // signaling NAN
opb.binary_value = get_test_vector(); // any number
res_hw.float_value = riscv_intrinsic_fadds(opa.float_value, opb.float_value); // discard result
res_sw.binary_value = (uint32_t)(1 << CSR_FFLAGS_NV);
res_hw.binary_value = neorv32_cpu_csr_read(CSR_FFLAGS) & (1 << CSR_FFLAGS_NV);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Initialize FPU hardware
// ----------------------------------------------------------------------------
neorv32_cpu_csr_write(CSR_FCSR, 0); // clear exception flags and set "round to nearest"
// ----------------------------------------------------------------------------
// Conversion Tests
// ----------------------------------------------------------------------------
#if (RUN_CONV_TESTS != 0)
neorv32_uart0_printf("\n#%u: FCVT.S.WU (unsigned integer to float)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fcvt_swu(opa.binary_value);
res_sw.float_value = riscv_emulate_fcvt_swu(opa.binary_value);
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FCVT.S.W (signed integer to float)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fcvt_sw((int32_t)opa.binary_value);
res_sw.float_value = riscv_emulate_fcvt_sw((int32_t)opa.binary_value);
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FCVT.WU.S (float to unsigned integer)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
res_hw.binary_value = riscv_intrinsic_fcvt_wus(opa.float_value);
res_sw.binary_value = riscv_emulate_fcvt_wus(opa.float_value);
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FCVT.W.S (float to signed integer)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
res_hw.binary_value = (uint32_t)riscv_intrinsic_fcvt_ws(opa.float_value);
res_sw.binary_value = (uint32_t)riscv_emulate_fcvt_ws(opa.float_value);
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Add/Sub Tests
// ----------------------------------------------------------------------------
#if (RUN_ADDSUB_TESTS != 0)
neorv32_uart0_printf("\n#%u: FADD.S (addition)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fadds(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fadds(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FSUB.S (subtraction)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fsubs(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fsubs(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Multiplication Tests
// ----------------------------------------------------------------------------
#if (RUN_MUL_TESTS != 0)
neorv32_uart0_printf("\n#%u: FMUL.S (multiplication)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fmuls(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fmuls(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Min/Max Tests
// ----------------------------------------------------------------------------
#if (RUN_MINMAX_TESTS != 0)
neorv32_uart0_printf("\n#%u: FMIN.S (select minimum)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fmins(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fmins(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FMAX.S (select maximum)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fmaxs(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fmaxs(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Comparison Tests
// ----------------------------------------------------------------------------
#if (RUN_COMPARE_TESTS != 0)
neorv32_uart0_printf("\n#%u: FEQ.S (compare if equal)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.binary_value = riscv_intrinsic_feqs(opa.float_value, opb.float_value);
res_sw.binary_value = riscv_emulate_feqs(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FLT.S (compare if less-than)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.binary_value = riscv_intrinsic_flts(opa.float_value, opb.float_value);
res_sw.binary_value = riscv_emulate_flts(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FLE.S (compare if less-than-or-equal)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.binary_value = riscv_intrinsic_fles(opa.float_value, opb.float_value);
res_sw.binary_value = riscv_emulate_fles(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Sign-Injection Tests
// ----------------------------------------------------------------------------
#if (RUN_SGNINJ_TESTS != 0)
neorv32_uart0_printf("\n#%u: FSGNJ.S (sign-injection)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fsgnjs(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fsgnjs(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FSGNJN.S (sign-injection NOT)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fsgnjns(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fsgnjns(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
neorv32_uart0_printf("\n#%u: FSGNJX.S (sign-injection XOR)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
res_hw.float_value = riscv_intrinsic_fsgnjxs(opa.float_value, opb.float_value);
res_sw.float_value = riscv_emulate_fsgnjxs(opa.float_value, opb.float_value);
err_cnt += verify_result(i, opa.binary_value, opb.binary_value, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// Classify Tests
// ----------------------------------------------------------------------------
#if (RUN_CLASSIFY_TESTS != 0)
neorv32_uart0_printf("\n#%u: FCLASS.S (classify)...\n", test_cnt);
err_cnt = 0;
for (i=0;i<(uint32_t)NUM_TEST_CASES; i++) {
opa.binary_value = get_test_vector();
res_hw.binary_value = riscv_intrinsic_fclasss(opa.float_value);
res_sw.binary_value = riscv_emulate_fclasss(opa.float_value);
err_cnt += verify_result(i, opa.binary_value, 0, res_sw.binary_value, res_hw.binary_value);
}
print_report(err_cnt);
err_cnt_total += err_cnt;
test_cnt++;
#endif
// ----------------------------------------------------------------------------
// UNSUPPORTED Instructions Tests - Execution should raise illegal instruction exception
// ----------------------------------------------------------------------------
#if (RUN_UNAVAIL_TESTS != 0)
neorv32_uart0_printf("\n# unsupported FDIV.S (division) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fdivs(opa.float_value, opb.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
neorv32_uart0_printf("\n# unsupported FSQRT.S (square root) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fsqrts(opa.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
neorv32_uart0_printf("\n# unsupported FMADD.S (fused multiply-add) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fmadds(opa.float_value, opb.float_value, -opa.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
neorv32_uart0_printf("\n# unsupported FMSUB.S (fused multiply-sub) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fmsubs(opa.float_value, opb.float_value, -opa.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
neorv32_uart0_printf("\n# unsupported FNMSUB.S (fused negated multiply-sub) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fnmadds(opa.float_value, opb.float_value, -opa.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
neorv32_uart0_printf("\n# unsupported FNMADD.S (fused negated multiply-add) [illegal instruction]...\n");
neorv32_cpu_csr_write(CSR_MCAUSE, 0);
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
riscv_intrinsic_fnmadds(opa.float_value, opb.float_value, -opa.float_value);
if (neorv32_cpu_csr_read(CSR_MCAUSE) != TRAP_CODE_I_ILLEGAL) {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
err_cnt_total++;
}
else {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
#endif
// ----------------------------------------------------------------------------
// Instruction execution timing test
// ----------------------------------------------------------------------------
#if (RUN_TIMING_TESTS != 0)
uint32_t time_start, time_sw, time_hw;
const uint32_t num_runs = 4096;
neorv32_uart0_printf("\nAverage execution time tests (%u runs)\n", num_runs);
// signed integer to float
neorv32_uart0_printf("FCVT.S.W: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fcvt_sw((int32_t)opa.binary_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fcvt_sw((int32_t)opa.binary_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// float to signed integer
neorv32_uart0_printf("FCVT.W.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.binary_value = (uint32_t)riscv_intrinsic_fcvt_ws(opa.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.binary_value = (uint32_t)riscv_emulate_fcvt_ws(opa.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// addition
neorv32_uart0_printf("FADD.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fadds(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fadds(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// subtraction
neorv32_uart0_printf("FSUB.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fsubs(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fsubs(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// multiplication
neorv32_uart0_printf("FMUL.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fmuls(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fmuls(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// Max
neorv32_uart0_printf("FMAX.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fmaxs(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fmaxs(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// Comparison
neorv32_uart0_printf("FLE.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fles(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fles(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
// Sign-injection
neorv32_uart0_printf("FSGNJX.S: ");
time_sw = 0;
time_hw = 0;
err_cnt = 0;
for (i=0; i<num_runs; i++) {
opa.binary_value = get_test_vector();
opb.binary_value = get_test_vector();
// hardware execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_hw.float_value = riscv_intrinsic_fsgnjxs(opa.float_value, opb.float_value);
}
time_hw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
time_hw -= 4; // remove the 2 dummy instructions
// software (emulation) execution time
time_start = neorv32_cpu_csr_read(CSR_CYCLE);
{
res_sw.float_value = riscv_emulate_fsgnjxs(opa.float_value, opb.float_value);
}
time_sw += neorv32_cpu_csr_read(CSR_CYCLE) - time_start;
if (res_sw.binary_value != res_hw.binary_value) {
err_cnt++;
}
}
if (err_cnt == 0) {
neorv32_uart0_printf("cycles[SW] = %u vs. cycles[HW] = %u\n", time_sw/num_runs, time_hw/num_runs);
}
else {
neorv32_uart0_printf("%c[1m[TEST FAILED!]%c[0m\n", 27, 27);
err_cnt_total++;
}
#endif
// ----------------------------------------------------------------------------
// Final report
// ----------------------------------------------------------------------------
if (err_cnt_total != 0) {
neorv32_uart0_printf("\n%c[1m[ZFINX EXTENSION VERIFICATION FAILED!]%c[0m\n", 27, 27);
neorv32_uart0_printf("%u errors in %u test cases\n", err_cnt_total, test_cnt*(uint32_t)NUM_TEST_CASES);
return 1;
}
else {
neorv32_uart0_printf("\n%c[1m[Zfinx extension verification successful!]%c[0m\n", 27, 27);
return 0;
}
}
/**********************************************************************//**
* Generate 32-bit test data (including special values like INFINITY every now and then).
*
* @return Test data (32-bit).
**************************************************************************/
uint32_t get_test_vector(void) {
float_conv_t tmp;
// generate special value "every" ~256th time this function is called
if ((xorshift32() & 0xff) == 0xff) {
switch((xorshift32() >> 10) & 0x3) { // random decision which special value we are taking
case 0: tmp.float_value = +INFINITY; break;
case 1: tmp.float_value = -INFINITY; break;
case 2: tmp.float_value = +0.0f; break;
case 3: tmp.float_value = -0.0f; break;
case 4: tmp.binary_value = 0x7fffffff; break;
case 5: tmp.binary_value = 0xffffffff; break;
case 6: tmp.float_value = NAN; break;
case 7: tmp.float_value = NAN; break; // FIXME signaling_NAN?
default: tmp.float_value = NAN; break;
}
}
else {
tmp.binary_value = xorshift32();
}
return tmp.binary_value;
}
/**********************************************************************//**
* PSEUDO-RANDOM number generator.
*
* @return Random data (32-bit).
**************************************************************************/
uint32_t xorshift32(void) {
static uint32_t x32 = 314159265;
x32 ^= x32 << 13;
x32 ^= x32 >> 17;
x32 ^= x32 << 5;
return x32;
}
/**********************************************************************//**
* Verify results (software reference vs. actual hardware).
*
* @param[in] num Test case number
* @param[in] opa Operand 1
* @param[in] opb Operand 2
* @param[in] ref Software reference
* @param[in] res Actual results from hardware
* @return zero if results are equal.
**************************************************************************/
uint32_t verify_result(uint32_t num, uint32_t opa, uint32_t opb, uint32_t ref, uint32_t res) {
#if (SILENT_MODE == 0)
neorv32_uart0_printf("%u: opa = 0x%x, opb = 0x%x : ref[SW] = 0x%x vs. res[HW] = 0x%x ", num, opa, opb, ref, res);
#endif
if (ref != res) {
#if (SILENT_MODE != 0)
neorv32_uart0_printf("%u: opa = 0x%x, opb = 0x%x : ref[SW] = 0x%x vs. res[HW] = 0x%x ", num, opa, opb, ref, res);
#endif
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
return 1;
}
else {
#if (SILENT_MODE == 0)
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
#endif
return 0;
}
}
/**********************************************************************//**
* Print test report.
*
* @param[in] num_err Number or errors in this test.
**************************************************************************/
void print_report(uint32_t num_err) {
neorv32_uart0_printf("Errors: %u/%u ", num_err, (uint32_t)NUM_TEST_CASES);
if (num_err == 0) {
neorv32_uart0_printf("%c[1m[ok]%c[0m\n", 27, 27);
}
else {
neorv32_uart0_printf("%c[1m[FAILED]%c[0m\n", 27, 27);
}
}