1 //===-- Unittests for stdbit ----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 /* 10 * The intent of this test is validate that: 11 * 1. We provide the definition of the various type generic macros of stdbit.h 12 * (the macros are transitively included from stdbit-macros.h by stdbit.h). 13 * 2. It dispatches to the correct underlying function. 14 * Because unit tests build without public packaging, the object files produced 15 * do not contain non-namespaced symbols. 16 */ 17 18 /* 19 * Declare these BEFORE including stdbit-macros.h so that this test may still be 20 * run even if a given target doesn't yet have these individual entrypoints 21 * enabled. 22 */ 23 #include "stdbit_stub.h" 24 25 #include "include/llvm-libc-macros/stdbit-macros.h" 26 27 #include <assert.h> 28 29 #define CHECK_FUNCTION(FUNC_NAME, VAL) \ 30 do { \ 31 assert(FUNC_NAME((unsigned char)0U) == VAL##AU); \ 32 assert(FUNC_NAME((unsigned short)0U) == VAL##BU); \ 33 assert(FUNC_NAME(0U) == VAL##CU); \ 34 assert(FUNC_NAME(0UL) == VAL##DU); \ 35 assert(FUNC_NAME(0ULL) == VAL##EU); \ 36 } while (0) 37 38 int main(void) { 39 CHECK_FUNCTION(stdc_leading_zeros, 0xA); 40 CHECK_FUNCTION(stdc_leading_ones, 0xB); 41 CHECK_FUNCTION(stdc_trailing_zeros, 0xC); 42 CHECK_FUNCTION(stdc_trailing_ones, 0xD); 43 CHECK_FUNCTION(stdc_first_leading_zero, 0xE); 44 CHECK_FUNCTION(stdc_first_leading_one, 0xF); 45 CHECK_FUNCTION(stdc_first_trailing_zero, 0x0); 46 CHECK_FUNCTION(stdc_first_trailing_one, 0x1); 47 CHECK_FUNCTION(stdc_count_zeros, 0x2); 48 CHECK_FUNCTION(stdc_count_ones, 0x3); 49 50 assert(!stdc_has_single_bit((unsigned char)1U)); 51 assert(!stdc_has_single_bit((unsigned short)1U)); 52 assert(!stdc_has_single_bit(1U)); 53 assert(!stdc_has_single_bit(1UL)); 54 assert(!stdc_has_single_bit(1ULL)); 55 56 CHECK_FUNCTION(stdc_bit_width, 0x4); 57 CHECK_FUNCTION(stdc_bit_floor, 0x5); 58 CHECK_FUNCTION(stdc_bit_ceil, 0x6); 59 60 return 0; 61 } 62