tests/lib/libgcc-test.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include "../lib/libgcc.c"
   4
   5 #include <tests/test.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 struct {
  10         u32 value;
  11         int expected_output;
  12 } test_data[] = {
  13         /* GCC documentation says, __clzsi2() has undefined result for zero as an input value,
  14            but coreboot implementation can handle this. */
  15         {.value = 0, .expected_output = 32},
  16
  17         {.value = 1, .expected_output = 31},
  18         {.value = 2, .expected_output = 30},
  19         {.value = 3, .expected_output = 30},
  20         {.value = 4, .expected_output = 29},
  21         {.value = 5, .expected_output = 29},
  22         {.value = 6, .expected_output = 29},
  23         {.value = 7, .expected_output = 29},
  24
  25         {.value = 0xF, .expected_output = 28},
  26         {.value = 0x10, .expected_output = 27},
  27         {.value = 0x25, .expected_output = 26},
  28         {.value = 0x5D, .expected_output = 25},
  29         {.value = 0xB7, .expected_output = 24},
  30
  31         {.value = 0x133, .expected_output = 23},
  32         {.value = 0x3DC, .expected_output = 22},
  33         {.value = 0x6F1, .expected_output = 21},
  34         {.value = 0x897, .expected_output = 20},
  35
  36         {.value = 0x1FFF, .expected_output = 19},
  37         {.value = 0x2222, .expected_output = 18},
  38         {.value = 0x7BAD, .expected_output = 17},
  39         {.value = 0xE708, .expected_output = 16},
  40
  41         {.value = 0x1DABD, .expected_output = 15},
  42         {.value = 0x29876, .expected_output = 14},
  43         {.value = 0x56665, .expected_output = 13},
  44         {.value = 0xABCDE, .expected_output = 12},
  45
  46         {.value = 0x18365F, .expected_output = 11},
  47         {.value = 0x3D0115, .expected_output = 10},
  48         {.value = 0x4B07EB, .expected_output = 9},
  49         {.value = 0xCCC74D, .expected_output = 8},
  50
  51         {.value = 0x17933ED, .expected_output = 7},
  52         {.value = 0x2B00071, .expected_output = 6},
  53         {.value = 0x4D4C1A5, .expected_output = 5},
  54         {.value = 0xAD01FFF, .expected_output = 4},
  55
  56         {.value = 0x1C5A8057, .expected_output = 3},
  57         {.value = 0x35AB23C3, .expected_output = 2},
  58         {.value = 0x7017013B, .expected_output = 1},
  59         {.value = 0xAD01EB15, .expected_output = 0},
  60
  61         {.value = 0xFFFFFFFF, .expected_output = 0},
  62         {.value = 0x80000000, .expected_output = 0},
  63         {.value = 0x7FFFFFFF, .expected_output = 1},
  64         {.value = 0x30000000, .expected_output = 2},
  65         {.value = 0x10000000, .expected_output = 3},
  66         {.value = 0x0FFFFFFF, .expected_output = 4},
  67
  68         {.value = 0xFF000000, .expected_output = 0},
  69         {.value = 0x00FF0000, .expected_output = 8},
  70         {.value = 0x0000FF00, .expected_output = 16},
  71         {.value = 0x000000FF, .expected_output = 24},
  72
  73         {.value = 0x8F000000, .expected_output = 0},
  74         {.value = 0x008F0000, .expected_output = 8},
  75         {.value = 0x00008F00, .expected_output = 16},
  76         {.value = 0x0000008F, .expected_output = 24},
  77
  78         {.value = 0x7F000000, .expected_output = 1},
  79         {.value = 0x007F0000, .expected_output = 9},
  80         {.value = 0x00007F00, .expected_output = 17},
  81         {.value = 0x0000007F, .expected_output = 25},
  82
  83         {.value = 0x3F000000, .expected_output = 2},
  84         {.value = 0x003F0000, .expected_output = 10},
  85         {.value = 0x00003F00, .expected_output = 18},
  86         {.value = 0x0000003F, .expected_output = 26},
  87
  88         {.value = 0x1F000000, .expected_output = 3},
  89         {.value = 0x001F0000, .expected_output = 11},
  90         {.value = 0x00001F00, .expected_output = 19},
  91         {.value = 0x0000001F, .expected_output = 27},
  92
  93         {.value = 0x0F000000, .expected_output = 4},
  94         {.value = 0x000F0000, .expected_output = 12},
  95         {.value = 0x00000F00, .expected_output = 20},
  96         {.value = 0x0000000F, .expected_output = 28},
  97
  98         {.value = 0x08000000, .expected_output = 4},
  99         {.value = 0x00080000, .expected_output = 12},
 100         {.value = 0x00000800, .expected_output = 20},
 101         {.value = 0x00000008, .expected_output = 28},
 102
 103         {.value = 0x07000000, .expected_output = 5},
 104         {.value = 0x00070000, .expected_output = 13},
 105         {.value = 0x00000700, .expected_output = 21},
 106         {.value = 0x00000007, .expected_output = 29},
 107
 108         {.value = 0x03000000, .expected_output = 6},
 109         {.value = 0x00030000, .expected_output = 14},
 110         {.value = 0x00000300, .expected_output = 22},
 111         {.value = 0x00000003, .expected_output = 30},
 112
 113         {.value = 0x01000000, .expected_output = 7},
 114         {.value = 0x00010000, .expected_output = 15},
 115         {.value = 0x00000100, .expected_output = 23},
 116         {.value = 0x00000001, .expected_output = 31},
 117 };
 118
 119 void test_clzsi2_with_data(void **state)
 120 {
 121         for (int i = 0; i < ARRAY_SIZE(test_data); ++i)
 122                 assert_int_equal(test_data[i].expected_output, __clzsi2(test_data[i].value));
 123 }
 124
 125 int main(void)
 126 {
 127         const struct CMUnitTest tests[] = {
 128                 cmocka_unit_test(test_clzsi2_with_data),
 129         };
 130
 131         return cb_run_group_tests(tests, NULL, NULL);
 132 }