libc/test/include/stdbit_stub.h

   1 //===-- Utilities for testing 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  * Declare these BEFORE including stdbit-macros.h so that this test may still be
  11  * run even if a given target doesn't yet have these individual entrypoints
  12  * enabled.
  13  */
  14
  15 #include "include/__llvm-libc-common.h"
  16
  17 #include <stdbool.h> // bool in C
  18
  19 #define STDBIT_STUB_FUNCTION(FUNC_NAME, LEADING_VAL)                           \
  20   unsigned FUNC_NAME##_uc(unsigned char x) { return LEADING_VAL##AU; }         \
  21   unsigned FUNC_NAME##_us(unsigned short x) { return LEADING_VAL##BU; }        \
  22   unsigned FUNC_NAME##_ui(unsigned int x) { return LEADING_VAL##CU; }          \
  23   unsigned FUNC_NAME##_ul(unsigned long x) { return LEADING_VAL##DU; }         \
  24   unsigned FUNC_NAME##_ull(unsigned long long x) { return LEADING_VAL##EU; }
  25
  26 __BEGIN_C_DECLS
  27
  28 STDBIT_STUB_FUNCTION(stdc_leading_zeros, 0xA)
  29 STDBIT_STUB_FUNCTION(stdc_leading_ones, 0xB)
  30 STDBIT_STUB_FUNCTION(stdc_trailing_zeros, 0xC)
  31 STDBIT_STUB_FUNCTION(stdc_trailing_ones, 0xD)
  32 STDBIT_STUB_FUNCTION(stdc_first_leading_zero, 0xE)
  33 STDBIT_STUB_FUNCTION(stdc_first_leading_one, 0xF)
  34 STDBIT_STUB_FUNCTION(stdc_first_trailing_zero, 0x0)
  35 STDBIT_STUB_FUNCTION(stdc_first_trailing_one, 0x1)
  36 STDBIT_STUB_FUNCTION(stdc_count_zeros, 0x2)
  37 STDBIT_STUB_FUNCTION(stdc_count_ones, 0x3)
  38
  39 bool stdc_has_single_bit_uc(unsigned char x) { return false; }
  40 bool stdc_has_single_bit_us(unsigned short x) { return false; }
  41 bool stdc_has_single_bit_ui(unsigned x) { return false; }
  42 bool stdc_has_single_bit_ul(unsigned long x) { return false; }
  43 bool stdc_has_single_bit_ull(unsigned long long x) { return false; }
  44
  45 STDBIT_STUB_FUNCTION(stdc_bit_width, 0x4)
  46
  47 unsigned char stdc_bit_floor_uc(unsigned char x) { return 0x5AU; }
  48 unsigned short stdc_bit_floor_us(unsigned short x) { return 0x5BU; }
  49 unsigned stdc_bit_floor_ui(unsigned x) { return 0x5CU; }
  50 unsigned long stdc_bit_floor_ul(unsigned long x) { return 0x5DUL; }
  51 unsigned long long stdc_bit_floor_ull(unsigned long long x) { return 0x5EULL; }
  52
  53 unsigned char stdc_bit_ceil_uc(unsigned char x) { return 0x6AU; }
  54 unsigned short stdc_bit_ceil_us(unsigned short x) { return 0x6BU; }
  55 unsigned stdc_bit_ceil_ui(unsigned x) { return 0x6CU; }
  56 unsigned long stdc_bit_ceil_ul(unsigned long x) { return 0x6DUL; }
  57 unsigned long long stdc_bit_ceil_ull(unsigned long long x) { return 0x6EULL; }
  58
  59 __END_C_DECLS