test/testplatform.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 16 Dec 2009 06:53:53 +0000
changeset 3579 3427271a2d75
parent 3319 63d4517fc4ac
child 3663 bc50cd16bb07
permissions -rw-r--r--
Added SDL_GetCPUCount() to see how many cores are available.
     1 
     2 #include <stdio.h>
     3 
     4 #include "SDL.h"
     5 #include "SDL_endian.h"
     6 #include "SDL_cpuinfo.h"
     7 
     8 /*
     9  * Watcom C flags these as Warning 201: "Unreachable code" if you just
    10  *  compare them directly, so we push it through a function to keep the
    11  *  compiler quiet.  --ryan.
    12  */
    13 static int
    14 badsize(size_t sizeoftype, size_t hardcodetype)
    15 {
    16     return sizeoftype != hardcodetype;
    17 }
    18 
    19 int
    20 TestTypes(SDL_bool verbose)
    21 {
    22     int error = 0;
    23 
    24     if (badsize(sizeof(Uint8), 1)) {
    25         if (verbose)
    26             printf("sizeof(Uint8) != 1, instead = %lu\n", sizeof(Uint8));
    27         ++error;
    28     }
    29     if (badsize(sizeof(Uint16), 2)) {
    30         if (verbose)
    31             printf("sizeof(Uint16) != 2, instead = %lu\n", sizeof(Uint16));
    32         ++error;
    33     }
    34     if (badsize(sizeof(Uint32), 4)) {
    35         if (verbose)
    36             printf("sizeof(Uint32) != 4, instead = %lu\n", sizeof(Uint32));
    37         ++error;
    38     }
    39 #ifdef SDL_HAS_64BIT_TYPE
    40     if (badsize(sizeof(Uint64), 8)) {
    41         if (verbose)
    42             printf("sizeof(Uint64) != 8, instead = %lu\n", sizeof(Uint64));
    43         ++error;
    44     }
    45 #else
    46     if (verbose) {
    47         printf("WARNING: No 64-bit datatype on this platform\n");
    48     }
    49 #endif
    50     if (verbose && !error)
    51         printf("All data types are the expected size.\n");
    52 
    53     return (error ? 1 : 0);
    54 }
    55 
    56 int
    57 TestEndian(SDL_bool verbose)
    58 {
    59     int error = 0;
    60     Uint16 value = 0x1234;
    61     int real_byteorder;
    62     Uint16 value16 = 0xCDAB;
    63     Uint16 swapped16 = 0xABCD;
    64     Uint32 value32 = 0xEFBEADDE;
    65     Uint32 swapped32 = 0xDEADBEEF;
    66 #ifdef SDL_HAS_64BIT_TYPE
    67     Uint64 value64, swapped64;
    68     value64 = 0xEFBEADDE;
    69     value64 <<= 32;
    70     value64 |= 0xCDAB3412;
    71     swapped64 = 0x1234ABCD;
    72     swapped64 <<= 32;
    73     swapped64 |= 0xDEADBEEF;
    74 #endif
    75 
    76     if (verbose) {
    77         printf("Detected a %s endian machine.\n",
    78                (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? "little" : "big");
    79     }
    80     if ((*((char *) &value) >> 4) == 0x1) {
    81         real_byteorder = SDL_BIG_ENDIAN;
    82     } else {
    83         real_byteorder = SDL_LIL_ENDIAN;
    84     }
    85     if (real_byteorder != SDL_BYTEORDER) {
    86         if (verbose) {
    87             printf("Actually a %s endian machine!\n",
    88                    (real_byteorder == SDL_LIL_ENDIAN) ? "little" : "big");
    89         }
    90         ++error;
    91     }
    92     if (verbose) {
    93         printf("Value 16 = 0x%X, swapped = 0x%X\n", value16,
    94                SDL_Swap16(value16));
    95     }
    96     if (SDL_Swap16(value16) != swapped16) {
    97         if (verbose) {
    98             printf("16 bit value swapped incorrectly!\n");
    99         }
   100         ++error;
   101     }
   102     if (verbose) {
   103         printf("Value 32 = 0x%X, swapped = 0x%X\n", value32,
   104                SDL_Swap32(value32));
   105     }
   106     if (SDL_Swap32(value32) != swapped32) {
   107         if (verbose) {
   108             printf("32 bit value swapped incorrectly!\n");
   109         }
   110         ++error;
   111     }
   112 #ifdef SDL_HAS_64BIT_TYPE
   113     if (verbose) {
   114 #ifdef _MSC_VER
   115         printf("Value 64 = 0x%I64X, swapped = 0x%I64X\n", value64,
   116                SDL_Swap64(value64));
   117 #else
   118         printf("Value 64 = 0x%llX, swapped = 0x%llX\n", value64,
   119                SDL_Swap64(value64));
   120 #endif
   121     }
   122     if (SDL_Swap64(value64) != swapped64) {
   123         if (verbose) {
   124             printf("64 bit value swapped incorrectly!\n");
   125         }
   126         ++error;
   127     }
   128 #endif
   129     return (error ? 1 : 0);
   130 }
   131 
   132 
   133 int
   134 TestCPUInfo(SDL_bool verbose)
   135 {
   136     if (verbose) {
   137         printf("CPU count: %d\n", SDL_GetCPUCount());
   138         printf("RDTSC %s\n", SDL_HasRDTSC()? "detected" : "not detected");
   139         printf("MMX %s\n", SDL_HasMMX()? "detected" : "not detected");
   140         printf("MMX Ext %s\n", SDL_HasMMXExt()? "detected" : "not detected");
   141         printf("3DNow %s\n", SDL_Has3DNow()? "detected" : "not detected");
   142         printf("3DNow Ext %s\n",
   143                SDL_Has3DNowExt()? "detected" : "not detected");
   144         printf("SSE %s\n", SDL_HasSSE()? "detected" : "not detected");
   145         printf("SSE2 %s\n", SDL_HasSSE2()? "detected" : "not detected");
   146         printf("AltiVec %s\n", SDL_HasAltiVec()? "detected" : "not detected");
   147     }
   148     return (0);
   149 }
   150 
   151 int
   152 main(int argc, char *argv[])
   153 {
   154     SDL_bool verbose = SDL_TRUE;
   155     int status = 0;
   156 
   157     if (argv[1] && (SDL_strcmp(argv[1], "-q") == 0)) {
   158         verbose = SDL_FALSE;
   159     }
   160     if (verbose) {
   161         printf("This system is running %s\n", SDL_GetPlatform());
   162     }
   163 
   164     status += TestTypes(verbose);
   165     status += TestEndian(verbose);
   166     status += TestCPUInfo(verbose);
   167     return status;
   168 }