102 行
3 KiB
C
102 行
3 KiB
C
/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include <inttypes.h>
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#include "pico/stdlib.h"
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#include "pico/bit_ops.h"
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#include <stdlib.h>
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void test_builtin_bitops() {
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int32_t x = 0;
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for (uint32_t i = 0; i < 10000; i++) {
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uint32_t vals32[] = {
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i,
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1u << (i & 31u),
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i * 12355821u,
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};
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uint64_t vals64[] = {
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i,
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1ull << (i & 63u),
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i * 12345678123125ull,
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};
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for(int j=0; j<count_of(vals32); j++) {
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x += __builtin_popcount(vals32[j]);
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x += __builtin_popcountl(vals32[j]);
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x += (int32_t)__rev(vals32[j]);
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#if !PICO_ON_DEVICE
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// the following functions are undefined on host mode, but on RP2040 we return 32
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if (vals32[j]) {
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x += __builtin_clz(vals32[j]);
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x += __builtin_ctz(vals32[j]);
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} else {
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x += 64;
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}
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#else
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x += __builtin_clz(vals32[j]);
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x += __builtin_ctz(vals32[j]);
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// check l variants are the same
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if (__builtin_clz(vals32[j]) != __builtin_clzl(vals32[j])) x += 17;
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if (__builtin_ctz(vals32[j]) != __builtin_ctzl(vals32[j])) x += 23;
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#endif
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}
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for(int j=0; j<count_of(vals64); j++) {
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x += __builtin_popcountll(vals64[j]);
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x += (int32_t)__revll(vals64[j]);
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#if !PICO_ON_DEVICE
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// the following functions are undefined on host mode, but on RP2040 we return 64
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if (!vals64[j]) {
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x += 128;
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continue;
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}
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#endif
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x += __builtin_clzll(vals64[j]);
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x += __builtin_ctzll(vals64[j]);
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}
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}
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printf("Count is %d\n", (int)x);
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int32_t expected = 1475508680;
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if (x != expected) {
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printf("FAILED (expected count %d\n", (int) expected);
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exit(1);
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}
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}
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int main() {
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setup_default_uart();
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puts("Hellox, world!");
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printf("Hello world %d\n", 2);
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#if PICO_NO_HARDWARE
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puts("This is native");
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#endif
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#if PICO_NO_FLASH
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puts("This is no flash");
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#endif
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for (int i = 0; i < 64; i++) {
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uint32_t x = 1 << i;
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uint64_t xl = 1ull << i;
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// printf("%d %u %u %u %u \n", i, (uint)(x%10u), (uint)(x%16u), (uint)(xl %10u), (uint)(xl%16u));
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printf("%08x %08x %016llx %016llx\n", (uint) x, (uint) __rev(x), (unsigned long long) xl,
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(unsigned long long) __revll(xl));
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}
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test_builtin_bitops();
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for (int i = 0; i < 8; i++) {
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sleep_ms(500);
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printf( "%" PRIu64 "\n", to_us_since_boot(get_absolute_time()));
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}
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absolute_time_t until = delayed_by_us(get_absolute_time(), 500000);
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printf("\n");
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for (int i = 0; i < 8; i++) {
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sleep_until(until);
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printf("%" PRIu64 "\n", to_us_since_boot(get_absolute_time()));
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until = delayed_by_us(until, 500000);
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}
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puts("DONE");
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}
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