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 // SPDSList-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) __NOEXCEPT {                        \
  21     return LEADING_VAL##AU;                                                    \
  22   }                                                                            \
  23   unsigned FUNC_NAME##_us(unsigned short x) __NOEXCEPT {                       \
  24     return LEADING_VAL##BU;                                                    \
  25   }                                                                            \
  26   unsigned FUNC_NAME##_ui(unsigned int x) __NOEXCEPT {                         \
  27     return LEADING_VAL##CU;                                                    \
  28   }                                                                            \
  29   unsigned FUNC_NAME##_ul(unsigned long x) __NOEXCEPT {                        \
  30     return LEADING_VAL##DU;                                                    \
  31   }                                                                            \
  32   unsigned FUNC_NAME##_ull(unsigned long long x) __NOEXCEPT {                  \
  33     return LEADING_VAL##EU;                                                    \
  34   }
  35
  36 __BEGIN_C_DECLS
  37
  38 STDBIT_STUB_FUNCTION(stdc_leading_zeros, 0xA)
  39 STDBIT_STUB_FUNCTION(stdc_leading_ones, 0xB)
  40 STDBIT_STUB_FUNCTION(stdc_trailing_zeros, 0xC)
  41 STDBIT_STUB_FUNCTION(stdc_trailing_ones, 0xD)
  42 STDBIT_STUB_FUNCTION(stdc_first_leading_zero, 0xE)
  43 STDBIT_STUB_FUNCTION(stdc_first_leading_one, 0xF)
  44 STDBIT_STUB_FUNCTION(stdc_first_trailing_zero, 0x0)
  45 STDBIT_STUB_FUNCTION(stdc_first_trailing_one, 0x1)
  46 STDBIT_STUB_FUNCTION(stdc_count_zeros, 0x2)
  47 STDBIT_STUB_FUNCTION(stdc_count_ones, 0x3)
  48
  49 bool stdc_has_single_bit_uc(unsigned char x) __NOEXCEPT { return false; }
  50 bool stdc_has_single_bit_us(unsigned short x) __NOEXCEPT { return false; }
  51 bool stdc_has_single_bit_ui(unsigned x) __NOEXCEPT { return false; }
  52 bool stdc_has_single_bit_ul(unsigned long x) __NOEXCEPT { return false; }
  53 bool stdc_has_single_bit_ull(unsigned long long x) __NOEXCEPT { return false; }
  54
  55 STDBIT_STUB_FUNCTION(stdc_bit_width, 0x4)
  56
  57 unsigned char stdc_bit_floor_uc(unsigned char x) __NOEXCEPT { return 0x5AU; }
  58 unsigned short stdc_bit_floor_us(unsigned short x) __NOEXCEPT { return 0x5BU; }
  59 unsigned stdc_bit_floor_ui(unsigned x) __NOEXCEPT { return 0x5CU; }
  60 unsigned long stdc_bit_floor_ul(unsigned long x) __NOEXCEPT { return 0x5DUL; }
  61 unsigned long long stdc_bit_floor_ull(unsigned long long x) __NOEXCEPT {
  62   return 0x5EULL;
  63 }
  64
  65 unsigned char stdc_bit_ceil_uc(unsigned char x) __NOEXCEPT { return 0x6AU; }
  66 unsigned short stdc_bit_ceil_us(unsigned short x) __NOEXCEPT { return 0x6BU; }
  67 unsigned stdc_bit_ceil_ui(unsigned x) __NOEXCEPT { return 0x6CU; }
  68 unsigned long stdc_bit_ceil_ul(unsigned long x) __NOEXCEPT { return 0x6DUL; }
  69 unsigned long long stdc_bit_ceil_ull(unsigned long long x) __NOEXCEPT {
  70   return 0x6EULL;
  71 }
  72
  73 __END_C_DECLS