| //===--- part_select.c --- Test The bit_select builtin --------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This test case tests the __builtin_part_select builtin function llvm-gcc. |
| // bit_select selects one bit out of a larger |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include "bits.h" |
| |
| #ifdef ENABLE_LARGE_INTEGERS |
| typedef uint256 BitType; |
| const BitType X = 0xAAAAAAAAAAAAAAAAULL; |
| #else |
| typedef uint47 BitType; |
| const BitType X = 0xAAAAAAAAAAAAAAAAULL; |
| #endif |
| |
| int main(int argc, char** argv) |
| { |
| |
| #ifdef ENABLE_LARGE_INTEGERS |
| BitType Y = X * X; |
| #else |
| BitType Y = X; |
| #endif |
| |
| srand(0); |
| |
| unsigned i, j; |
| |
| for (i = 0; i < bitwidthof(BitType); ++i) { |
| BitType high = rand() % bitwidthof(BitType); |
| BitType low = i; |
| printf("part_select(Y, %3u, %3u) = ", (unsigned)low, (unsigned)high); |
| BitType Z = part_select(Y, low, high ); |
| printBits(Z); |
| uint64_t val = Z; |
| printf(" (%llx)", val); |
| printf("\n"); |
| } |
| |
| BitType Z = part_select(Y, 0, bitwidthof(Y)-1); |
| if (Z == Y) |
| printf(" True: "); |
| else |
| printf("False: "); |
| printBits(Z); |
| printf(" == "); |
| printBits(Y); |
| printf("\n"); |
| |
| |
| return 0; |
| } |