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599 lines
37 KiB
599 lines
37 KiB
#line 1 "intparam.d"
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/* Bestimmung einiger Maschinen-Parameter und -Abh�gigkeiten */
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/* und Ausgabe in ein Include-File */
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/* Bruno Haible 10.9.1991, 12.10.1992, 6.12.1992, 24.10.1993 */
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/* Auf einigen Systemen werden in <sys/types.h> die Typen uchar, ushort, uint, */
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/* ulong definiert. Normalerweise reicht _POSIX_SOURCE aus, dies zu verhindern, */
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/* bei AIX 3.2.5 (rs6000-ibm-aix3.2.5) jedoch nicht. Wir mssen Gewalt anwenden. */
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#define _POSIX_SOURCE
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#define uchar os_uchar
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#define ushort os_ushort
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#define uint os_uint
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#define ulong os_ulong
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#include <stdio.h>
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#undef ulong
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#undef uint
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#undef ushort
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#undef uchar
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#if !(defined(__STDC__) || defined(__cplusplus))
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/* Only for use in function parameter lists and as function return type. */
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#define void
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#endif
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#define loop while(1)
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typedef int boolean;
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#define TRUE 1
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#define FALSE 0
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#ifdef __CHAR_UNSIGNED__
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typedef signed char schar;
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#else
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typedef char schar;
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#endif
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typedef unsigned char uchar;
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typedef unsigned short ushort;
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typedef unsigned /* int */ uint;
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typedef unsigned long ulong;
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#ifdef HAVE_LONGLONG
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typedef long long longlong;
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typedef unsigned long long ulonglong;
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#endif
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typedef int (function)();
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static int random_table[256] = /* 2048 zuf�lige Bits, hier von pi */
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{ 0xC9,0x0F,0xDA,0xA2,0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,
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0x80,0xDC,0x1C,0xD1,0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,
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0x02,0x0B,0xBE,0xA6,0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,
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0x8E,0x34,0x04,0xDD,0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,
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0x30,0x2B,0x0A,0x6D,0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,
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0x6D,0x51,0xC2,0x45,0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,
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0xF4,0x4C,0x42,0xE9,0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,
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0xF4,0x06,0xB7,0xED,0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,
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0xAE,0x9F,0x24,0x11,0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,
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0xEC,0xE4,0x5B,0x3D,0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,
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0x98,0xDA,0x48,0x36,0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,
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0xFD,0x24,0xCF,0x5F,0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,
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0x1C,0x62,0xF3,0x56,0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,
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0x70,0x96,0x96,0x6D,0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,
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0xF1,0x74,0x6C,0x08,0xCA,0x18,0x21,0x7C,0x32,0x90,0x5E,0x46,
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0x2E,0x36,0xCE,0x3B,0xE3,0x9E,0x77,0x2C,0x18,0x0E,0x86,0x03,
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0x9B,0x27,0x83,0xA2,0xEC,0x07,0xA2,0x8F,0xB5,0xC5,0x5D,0xF0,
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0x6F,0x4C,0x52,0xC9,0xDE,0x2B,0xCB,0xF6,0x95,0x58,0x17,0x18,
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0x39,0x95,0x49,0x7C,0xEA,0x95,0x6A,0xE5,0x15,0xD2,0x26,0x18,
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0x98,0xFA,0x05,0x10,0x15,0x72,0x8E,0x5A,0x8A,0xAA,0xC4,0x2D,
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0xAD,0x33,0x17,0x0D,0x04,0x50,0x7A,0x33,0xA8,0x55,0x21,0xAB,
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0xDF,0x1C,0xBA,0x65,
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};
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#define random_table_length (8*256)
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static int random_position = -1;
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int next_random_bit(void)
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{ random_position++;
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if (random_position==random_table_length) random_position = 0;
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return (random_table[random_position/8] >> (random_position % 8)) & 1;
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}
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#if defined(__STDC__) || defined(__cplusplus)
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void printf_underscored (const char* string)
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#else
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void printf_underscored(string)
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char* string;
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#endif
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{ char c;
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while (!((c = *string++) == '\0')) { printf("%c",(c==' ' ? '_' : c)); }
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}
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/* string_length(string) is the same as strlen(string). */
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/* Better avoid to depend on <string.h>. */
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#if defined(__STDC__) || defined(__cplusplus)
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int string_length (char* string)
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#else
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int string_length(string)
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char* string;
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#endif
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{ int count = 0;
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while (!(*string++ == '\0')) { count++; }
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return count;
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}
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static int char_bitsize, short_bitsize, int_bitsize, long_bitsize;
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static int uchar_bitsize, ushort_bitsize, uint_bitsize, ulong_bitsize;
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static boolean char_uchar_same, short_ushort_same, int_uint_same, long_ulong_same;
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static int pointer_bitsize;
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#ifdef HAVE_LONGLONG
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static int longlong_bitsize, ulonglong_bitsize;
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static boolean longlong_ulonglong_same;
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#endif
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void main1(void) {
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#define get_unsigned_integer_bitsize(type,where) \
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{ type x = 1; \
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int bits = 0; \
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loop { \
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if (x==0) break; \
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x = x+x; \
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bits++; \
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if (bits==1000) { bits = -1; break; } \
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} \
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where = bits; \
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}
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#define get_signed_integer_bitsize(type,unsigned_type,where) \
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{ /* Signed integer overflow is "undefined behaviour" in C99, and gcc-4.3 \
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(without -fwrapv option) actually does weird things when signed integer \
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overflow occurs. Therefore perform the addition on the unsigned type. \
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Drawback: This will not detect cases where the signed type has more bits\
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than the unsigned type but the same size according to sizeof. Blech. */ \
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type x = 1; \
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int bits = 0; \
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loop { \
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if (x==0) break; \
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x = (unsigned_type)x + (unsigned_type)x;\
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bits++; \
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if (bits==1000) { bits = -1; break; } \
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} \
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where = bits; \
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}
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#define print_integer_bitsize(type,typestr,where) \
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{ if (where >= 0) \
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{ printf("/* Integers of t%spe %s have %ld bits. */\n","y",typestr,(long)where); \
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if (!(typestr[0] == 'u')) \
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{ printf("#define "); printf_underscored(typestr); printf("_bitsize %ld\n",(long)where); } \
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printf("\n"); \
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} \
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else \
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{ printf("#error \"Integers of t%spe %s have no binary representation!!\"\n","y",typestr); } \
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if (!(where == char_bitsize * sizeof(type))) \
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{ printf("#error \"Formula BITSIZE(T) = SIZEOF(T) * BITSPERBYTE does not hold for t%spe %s!!\"\n","y",typestr); } \
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}
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get_signed_integer_bitsize(schar,uchar,char_bitsize);
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get_signed_integer_bitsize(short,ushort,short_bitsize);
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get_signed_integer_bitsize(int,uint,int_bitsize);
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get_signed_integer_bitsize(long,ulong,long_bitsize);
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print_integer_bitsize(schar,"char",char_bitsize);
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print_integer_bitsize(short,"short",short_bitsize);
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print_integer_bitsize(int,"int",int_bitsize);
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print_integer_bitsize(long,"long",long_bitsize);
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#ifdef HAVE_LONGLONG
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get_signed_integer_bitsize(longlong,ulonglong,longlong_bitsize);
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print_integer_bitsize(longlong,"long long",longlong_bitsize);
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#endif
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get_unsigned_integer_bitsize(uchar,uchar_bitsize);
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get_unsigned_integer_bitsize(ushort,ushort_bitsize);
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get_unsigned_integer_bitsize(uint,uint_bitsize);
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get_unsigned_integer_bitsize(ulong,ulong_bitsize);
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print_integer_bitsize(uchar,"unsigned char",uchar_bitsize);
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print_integer_bitsize(ushort,"unsigned short",ushort_bitsize);
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print_integer_bitsize(uint,"unsigned int",uint_bitsize);
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print_integer_bitsize(ulong,"unsigned long",ulong_bitsize);
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#ifdef HAVE_LONGLONG
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get_unsigned_integer_bitsize(ulonglong,ulonglong_bitsize);
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print_integer_bitsize(ulonglong,"unsigned long long",ulonglong_bitsize);
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#endif
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}
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void main2(void) {
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#define compare_integer_bitsizes(typestr1,typestr2,type1_bitsize,type2_bitsize) \
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{ if (!(type1_bitsize==type2_bitsize)) \
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printf("#error \"Integer types %s and %s have different sizes!!\"\n",typestr1,typestr2); \
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}
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compare_integer_bitsizes("char","unsigned char",char_bitsize,uchar_bitsize);
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compare_integer_bitsizes("short","unsigned short",short_bitsize,ushort_bitsize);
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compare_integer_bitsizes("int","unsigned int",int_bitsize,uint_bitsize);
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compare_integer_bitsizes("long","unsigned long",long_bitsize,ulong_bitsize);
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#ifdef HAVE_LONGLONG
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compare_integer_bitsizes("long long","unsigned long long",longlong_bitsize,ulonglong_bitsize);
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#endif
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}
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#define get_a_random(type,bitsize,where) \
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{ type x = 0; \
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int i = bitsize; \
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while (i>0) { x = (x<<1) + next_random_bit(); i--; } \
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where = x; \
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}
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#define get_a_random_twice(type1,type2,bitsize,where1,where2) \
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{ type1 x1 = 0; type2 x2 = 0; \
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int i = bitsize; \
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while (i>0) \
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{ type1 b = next_random_bit(); \
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x1 = ((x1<<1) + b); x2 = ((x2<<1) + b); \
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i--; \
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} \
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where1 = x1; where2 = x2; \
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}
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void main3(void) {
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#define compare_integer_representation(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,where) \
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{ if ((type1_bitsize>=0) && (type2_bitsize>=0) && (type1_bitsize==type2_bitsize)) \
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{ int i,j; \
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type1 sample1; type2 sample2; \
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where = TRUE; \
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for (i = 0; i<100; i++) \
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{ get_a_random_twice(type1,type2,type1_bitsize,sample1,sample2); \
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if (!(sample1 == (type1)(sample2))) { where = FALSE; } \
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if (!(sample2 == (type2)(sample1))) { where = FALSE; } \
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} \
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for (i = 0; i<100; i++) \
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{ get_a_random(type1,type1_bitsize,sample1); \
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sample2 = (type2)(sample1); \
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for (j = 0; j < type1_bitsize; j++) \
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if (!( ((sample1 & ((type1)1<<j)) == 0) \
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== ((sample2 & ((type2)1<<j)) == 0) \
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) ) \
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{ where = FALSE; } \
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} \
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if (where) \
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{ printf("/* Integer types %s and %s have the same binary representation. */\n",typestr1,typestr2); } \
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else \
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{ printf("#error \"Integer types %s and %s have different binary representations!!\"\n",typestr1,typestr2); } \
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} \
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else \
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{ where = FALSE; } \
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}
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compare_integer_representation(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,char_uchar_same);
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compare_integer_representation(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,short_ushort_same);
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compare_integer_representation(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,int_uint_same);
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compare_integer_representation(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,long_ulong_same);
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#ifdef HAVE_LONGLONG
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compare_integer_representation(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,longlong_ulonglong_same);
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#endif
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printf("\n");
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}
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void main4(void) {
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#define test_integer_ushift(type,typestr,type_bitsize) \
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if (type_bitsize >= 0) \
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{ int i,j,shc; \
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type sample1,sample2; \
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boolean left_works = TRUE, right_works = TRUE; \
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for (i = 0; i<100; i++) \
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{ get_a_random(type,type_bitsize,sample1); \
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for (shc = 0; shc < type_bitsize; shc++) \
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{ sample2 = sample1 << shc; \
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for (j=0; j < type_bitsize; j++) \
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{ if (!( ((sample2 & ((type)1<<j)) == 0) \
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== \
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(j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0)) \
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) ) \
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{ left_works = FALSE; } \
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} } } \
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for (i = 0; i<100; i++) \
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{ get_a_random(type,type_bitsize,sample1); \
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for (shc = 0; shc < type_bitsize; shc++) \
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{ sample2 = sample1 >> shc; \
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for (j=0; j < type_bitsize; j++) \
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{ if (!( ((sample2 & ((type)1<<j)) == 0) \
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== \
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(j >= type_bitsize-shc ? TRUE : ((sample1 & ((type)1<<(j+shc))) == 0)) \
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) ) \
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{ right_works = FALSE; } \
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} } } \
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if (!left_works) \
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{ printf("#error \"Left shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
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if (!right_works) \
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{ printf("#error \"Right shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
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}
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#define test_integer_sshift(type,typestr,type_bitsize) \
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if (type_bitsize >= 0) \
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{ int i,j,shc; \
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type sample1,sample2; \
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boolean left_works = TRUE, right_works = TRUE; \
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for (i = 0; i<100; i++) \
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{ get_a_random(type,type_bitsize,sample1); \
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for (shc = 0; shc < type_bitsize; shc++) \
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{ sample2 = sample1 << shc; \
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for (j=0; j < type_bitsize; j++) \
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{ if (!( ((sample2 & ((type)1<<j)) == 0) \
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== \
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(j < shc ? TRUE : ((sample1 & ((type)1<<(j-shc))) == 0)) \
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) ) \
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{ left_works = FALSE; } \
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} } } \
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for (i = 0; i<100; i++) \
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{ get_a_random(type,type_bitsize,sample1); \
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for (shc = 0; shc < type_bitsize; shc++) \
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{ sample2 = sample1 >> shc; \
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for (j=0; j < type_bitsize; j++) \
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{ if (!( ((sample2 & ((type)1<<j)) == 0) \
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== \
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((sample1 & ((type)1<< (j+shc>=type_bitsize ? type_bitsize-1 : j+shc))) == 0) \
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) ) \
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{ right_works = FALSE; } \
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} } } \
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if (!left_works) \
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{ printf("#error \"Left shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
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if (!right_works) \
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{ printf("#error \"Right shift of integers of t%spe %s does not work!!\"\n","y",typestr); } \
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}
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test_integer_ushift(uchar,"unsigned char",uchar_bitsize);
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test_integer_ushift(ushort,"unsigned short",ushort_bitsize);
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test_integer_ushift(uint,"unsigned int",uint_bitsize);
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test_integer_ushift(ulong,"unsigned long",ulong_bitsize);
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#ifdef HAVE_LONGLONG
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test_integer_ushift(ulonglong,"unsigned long long",ulonglong_bitsize);
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#endif
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test_integer_sshift(schar,"char",char_bitsize);
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test_integer_sshift(short,"short",short_bitsize);
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test_integer_sshift(int,"int",int_bitsize);
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test_integer_sshift(long,"long",long_bitsize);
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#ifdef HAVE_LONGLONG
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test_integer_sshift(longlong,"long long",longlong_bitsize);
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#endif
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}
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void main5(void) {
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#define test_integer_casts(type1,type2,typestr1,typestr2,type1_bitsize,type2_bitsize,want) \
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if (type1_bitsize <= type2_bitsize) \
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{ int i,j; \
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boolean modifies = FALSE; \
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boolean zero_extends = TRUE; \
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boolean sign_extends = TRUE; \
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for (i = 0; i<100; i++) \
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{ type1 sample1; \
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type2 sample2; \
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get_a_random(type1,type1_bitsize,sample1); \
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sample2 = (type2)sample1; \
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if (!(sample1 == (type1)sample2)) { modifies = TRUE; } \
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for (j = 0; j<type1_bitsize; j++) \
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if (!( ((sample1 & ((type1)1<<j)) == 0) == ((sample2 & ((type2)1<<j)) == 0) )) \
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{ zero_extends = FALSE; sign_extends = FALSE; } \
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for (j = type1_bitsize; j<type2_bitsize; j++) \
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if (!((sample2 & ((type2)1<<j)) == 0)) \
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{ zero_extends = FALSE; } \
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for (j = type1_bitsize; j<type2_bitsize; j++) \
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if (!( ((sample1 & ((type1)1<<(type1_bitsize-1))) == 0) == ((sample2 & ((type2)1<<j)) == 0) )) \
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{ sign_extends = FALSE; } \
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} \
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if (modifies) \
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printf("#error \"Casts: (%s)(%s)(x) == x does not hold for every %s x !!\"\n",typestr1,typestr2,typestr1); \
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if (zero_extends && sign_extends) \
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{ if (!(type1_bitsize == type2_bitsize)) \
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printf("#error \"Casts from %s to %s works by identity!!\"\n",typestr1,typestr2); \
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} \
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if (zero_extends && !sign_extends) \
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{ if ((type1_bitsize == type2_bitsize) || !(typestr1[0] == 'u') || !(want==1)) \
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printf("#error \"Casts from %s to %s works by zero-extend!!\"\n",typestr1,typestr2); \
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} \
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if (sign_extends && !zero_extends) \
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{ if ((type1_bitsize == type2_bitsize) || (typestr1[0] == 'u') || !(want==2)) \
|
|
printf("#error \"Casts from %s to %s works by sign-extend!!\"\n",typestr1,typestr2); \
|
|
} \
|
|
if (!sign_extends && !zero_extends) \
|
|
printf("#error \"Casts from %s to %s works in an unknown manner!!\"\n",typestr1,typestr2); \
|
|
}
|
|
/* erst Casts zwischen Integers vermutlich gleicher Gr�e: */
|
|
test_integer_casts(schar,uchar,"char","unsigned char",char_bitsize,uchar_bitsize,0);
|
|
test_integer_casts(short,ushort,"short","unsigned short",short_bitsize,ushort_bitsize,0);
|
|
test_integer_casts(int,uint,"int","unsigned int",int_bitsize,uint_bitsize,0);
|
|
test_integer_casts(long,ulong,"long","unsigned long",long_bitsize,ulong_bitsize,0);
|
|
test_integer_casts(uchar,schar,"unsigned char","char",uchar_bitsize,char_bitsize,0);
|
|
test_integer_casts(ushort,short,"unsigned short","short",ushort_bitsize,short_bitsize,0);
|
|
test_integer_casts(uint,int,"unsigned int","int",uint_bitsize,int_bitsize,0);
|
|
test_integer_casts(ulong,long,"unsigned long","long",ulong_bitsize,long_bitsize,0);
|
|
#ifdef HAVE_LONGLONG
|
|
test_integer_casts(longlong,ulonglong,"long long","unsigned long long",longlong_bitsize,ulonglong_bitsize,0);
|
|
test_integer_casts(ulonglong,longlong,"unsigned long long","long long",ulonglong_bitsize,longlong_bitsize,0);
|
|
#endif
|
|
/* dann Casts zwischen Integers unterschiedlicher Gr�e, aber gleichen Vorzeichens: */
|
|
test_integer_casts(uchar,ushort,"unsigned char","unsigned short",uchar_bitsize,ushort_bitsize,1);
|
|
test_integer_casts(uchar,uint,"unsigned char","unsigned int",uchar_bitsize,uint_bitsize,1);
|
|
test_integer_casts(uchar,ulong,"unsigned char","unsigned long",uchar_bitsize,ulong_bitsize,1);
|
|
test_integer_casts(ushort,uint,"unsigned short","unsigned int",ushort_bitsize,uint_bitsize,1);
|
|
test_integer_casts(ushort,ulong,"unsigned short","unsigned long",ushort_bitsize,ulong_bitsize,1);
|
|
test_integer_casts(uint,ulong,"unsigned int","unsigned long",uint_bitsize,ulong_bitsize,1);
|
|
#ifdef HAVE_LONGLONG
|
|
test_integer_casts(uchar,ulonglong,"unsigned char","unsigned long long",uchar_bitsize,ulonglong_bitsize,1);
|
|
test_integer_casts(ushort,ulonglong,"unsigned short","unsigned long long",ushort_bitsize,ulonglong_bitsize,1);
|
|
test_integer_casts(uint,ulonglong,"unsigned int","unsigned long long",uint_bitsize,ulonglong_bitsize,1);
|
|
test_integer_casts(ulong,ulonglong,"unsigned long","unsigned long long",ulong_bitsize,ulonglong_bitsize,1);
|
|
#endif
|
|
test_integer_casts(schar,short,"char","short",char_bitsize,short_bitsize,2);
|
|
test_integer_casts(schar,int,"char","int",char_bitsize,int_bitsize,2);
|
|
test_integer_casts(schar,long,"char","long",char_bitsize,long_bitsize,2);
|
|
test_integer_casts(short,int,"short","int",short_bitsize,int_bitsize,2);
|
|
test_integer_casts(short,long,"short","long",short_bitsize,long_bitsize,2);
|
|
test_integer_casts(int,long,"int","long",int_bitsize,long_bitsize,2);
|
|
#ifdef HAVE_LONGLONG
|
|
test_integer_casts(schar,longlong,"char","long long",char_bitsize,longlong_bitsize,2);
|
|
test_integer_casts(short,longlong,"short","long long",short_bitsize,longlong_bitsize,2);
|
|
test_integer_casts(int,longlong,"int","long long",int_bitsize,longlong_bitsize,2);
|
|
test_integer_casts(long,longlong,"long","long long",long_bitsize,longlong_bitsize,2);
|
|
#endif
|
|
/* dann Casts zwischen Integers unterschiedlicher Gr�e und unterschiedlichen Vorzeichens: */
|
|
test_integer_casts(uchar,short,"unsigned char","short",uchar_bitsize,short_bitsize,1);
|
|
test_integer_casts(uchar,int,"unsigned char","int",uchar_bitsize,int_bitsize,1);
|
|
test_integer_casts(uchar,long,"unsigned char","long",uchar_bitsize,long_bitsize,1);
|
|
test_integer_casts(ushort,int,"unsigned short","int",ushort_bitsize,int_bitsize,1);
|
|
test_integer_casts(ushort,long,"unsigned short","long",ushort_bitsize,long_bitsize,1);
|
|
test_integer_casts(uint,long,"unsigned int","long",uint_bitsize,long_bitsize,1);
|
|
#ifdef HAVE_LONGLONG
|
|
test_integer_casts(uchar,longlong,"unsigned char","long long",uchar_bitsize,longlong_bitsize,1);
|
|
test_integer_casts(ushort,longlong,"unsigned short","long long",ushort_bitsize,longlong_bitsize,1);
|
|
test_integer_casts(uint,longlong,"unsigned int","long long",uint_bitsize,longlong_bitsize,1);
|
|
test_integer_casts(ulong,longlong,"unsigned long","long long",ulong_bitsize,longlong_bitsize,1);
|
|
#endif
|
|
test_integer_casts(schar,ushort,"char","unsigned short",char_bitsize,ushort_bitsize,2);
|
|
test_integer_casts(schar,uint,"char","unsigned int",char_bitsize,uint_bitsize,2);
|
|
test_integer_casts(schar,ulong,"char","unsigned long",char_bitsize,ulong_bitsize,2);
|
|
test_integer_casts(short,uint,"short","unsigned int",short_bitsize,uint_bitsize,2);
|
|
test_integer_casts(short,ulong,"short","unsigned long",short_bitsize,ulong_bitsize,2);
|
|
test_integer_casts(int,ulong,"int","unsigned long",int_bitsize,ulong_bitsize,2);
|
|
#ifdef HAVE_LONGLONG
|
|
test_integer_casts(schar,ulonglong,"char","unsigned long long",char_bitsize,ulonglong_bitsize,2);
|
|
test_integer_casts(short,ulonglong,"short","unsigned long long",short_bitsize,ulonglong_bitsize,2);
|
|
test_integer_casts(int,ulonglong,"int","unsigned long long",int_bitsize,ulonglong_bitsize,2);
|
|
test_integer_casts(long,ulonglong,"long","unsigned long long",long_bitsize,ulonglong_bitsize,2);
|
|
#endif
|
|
}
|
|
|
|
void main6(void) {
|
|
#define check_sizeof_pointer(type,typestr) \
|
|
{ if (!(sizeof(type) <= sizeof(long))) \
|
|
printf("#error \"Type %s does not fit into a long!!\"\n",typestr); \
|
|
}
|
|
check_sizeof_pointer(char*,"char *");
|
|
check_sizeof_pointer(long*,"long *");
|
|
check_sizeof_pointer(function*,"function *");
|
|
pointer_bitsize = char_bitsize * sizeof(char*);
|
|
printf("/* Pointers of t%spe %s have %ld bits. */\n","y","char *",(long)pointer_bitsize);
|
|
printf("#define pointer_bitsize %ld\n",(long)pointer_bitsize);
|
|
printf("\n");
|
|
}
|
|
|
|
void main7(void) {
|
|
#define test_pointer_casts(type1,type2,typestr1,typestr2) \
|
|
if (!(sizeof(type1) == sizeof(type2))) \
|
|
{ printf("#error \"Pointer types %s and %s have different sizes!!\"\n",typestr1,typestr2); } \
|
|
else \
|
|
{ int i; \
|
|
ulong differences1 = 0, differences2 = 0; \
|
|
for (i = 0; i<100; i++) \
|
|
{ ulong sample; \
|
|
type1 sample1; \
|
|
type2 sample2; \
|
|
get_a_random(ulong,ulong_bitsize,sample); \
|
|
sample1 = (type1)sample; \
|
|
sample2 = (type2)sample; \
|
|
differences1 |= ((ulong)sample1 ^ (ulong)(type1)(sample2)); \
|
|
differences2 |= ((ulong)sample2 ^ (ulong)(type2)(sample1)); \
|
|
} \
|
|
if (differences1==0) \
|
|
printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr2,typestr1); \
|
|
else \
|
|
if (differences1 == ~(ulong)0) \
|
|
printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr2,typestr1); \
|
|
else \
|
|
printf("#error \"Casts from %s to %s modify part 0x%8lX of pointer!!\"\n",typestr2,typestr1,differences1); \
|
|
if (differences2==0) \
|
|
printf("/* Casts from %s to %s is OK (does nothing). */\n",typestr1,typestr2); \
|
|
else \
|
|
if (differences2 == ~(ulong)0) \
|
|
printf("#error \"Casts from %s to %s work in an unknown way!!\"\n",typestr1,typestr2); \
|
|
else \
|
|
printf("#error \"Casts from %s to %s modify part 0x%8lX of pointer!!\"\n",typestr1,typestr2,differences2); \
|
|
}
|
|
test_pointer_casts(char*,long*,"char *","long *");
|
|
test_pointer_casts(char*,function*,"char *","function *");
|
|
printf("\n");
|
|
}
|
|
|
|
void main8(void) {
|
|
/* The following macro works only in C, not in C++, because C++ restricts the
|
|
use of NULL pointers and also because C++ forbids defining types within a
|
|
cast. */
|
|
#define alignmentof(type) \
|
|
(int)(&((struct { char dummy1; type dummy2; } *)0)->dummy2)
|
|
#define get_alignment(type,typestr) \
|
|
{ struct { char dummy1; type dummy2; } dummy; \
|
|
long alignment = (char*)&dummy.dummy2 - (char*)&dummy; \
|
|
printf("/* Type %s has sizeof = %ld and alignment = %ld. */\n",typestr,(long)sizeof(type),alignment); \
|
|
if (!(typestr[0] == 'u') && !(typestr[string_length(typestr)-1] == '*')) \
|
|
{ printf("#define sizeof_"); printf_underscored(typestr); printf(" %ld\n",(long)sizeof(type)); \
|
|
printf("#define alignment_"); printf_underscored(typestr); printf(" %ld\n",alignment); \
|
|
} \
|
|
if (!((alignment & (alignment-1)) == 0)) \
|
|
printf("#error \"The alignment %ld of t%spe %s is not a power of two!!\"\n",alignment,"y",typestr); \
|
|
printf("\n"); \
|
|
}
|
|
get_alignment(char,"char"); get_alignment(uchar,"unsigned char");
|
|
get_alignment(short,"short"); get_alignment(ushort,"unsigned short");
|
|
get_alignment(int,"int"); get_alignment(uint,"unsigned int");
|
|
get_alignment(long,"long"); get_alignment(ulong,"unsigned long");
|
|
#ifdef HAVE_LONGLONG
|
|
get_alignment(longlong,"long long"); get_alignment(ulonglong,"unsigned long long");
|
|
#endif
|
|
get_alignment(float,"float");
|
|
get_alignment(double,"double");
|
|
get_alignment(char*,"char *");
|
|
get_alignment(long*,"long *");
|
|
get_alignment(function*,"function *");
|
|
}
|
|
|
|
void main9(void) {
|
|
#define get_endian(type,typestr,type_bitsize) \
|
|
{ if (type_bitsize == uchar_bitsize * sizeof(type)) \
|
|
{ auto union { uchar einzeln[sizeof(type)]; type gesamt; } x; \
|
|
int i,j; \
|
|
boolean big_endian = TRUE; \
|
|
boolean little_endian = TRUE; \
|
|
for (i = 0; i<100; i++) \
|
|
{ type sample; \
|
|
get_a_random(type,type_bitsize,sample); \
|
|
x.gesamt = sample; \
|
|
for (j = 0; j<sizeof(type); j++, sample >>= uchar_bitsize) \
|
|
{ if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[j] )) \
|
|
{ little_endian = FALSE; } \
|
|
if (!( (sample & (((type)1<<uchar_bitsize)-1)) == x.einzeln[sizeof(type)-1-j] )) \
|
|
{ big_endian = FALSE; } \
|
|
} } \
|
|
if (big_endian && little_endian) \
|
|
{ if (!(sizeof(type) == 1)) \
|
|
printf("#error \"Endianness of t%spe %s in memory doesn't matter.\"\n","y",typestr); } \
|
|
if (big_endian && !little_endian) \
|
|
{ printf("/* Type %s is stored BIG-ENDIAN in memory (i.e. like mc68000 or sparc). */\n",typestr); \
|
|
printf("#define "); printf_underscored(&typestr[9]); printf("_big_endian\n"); \
|
|
} \
|
|
if (little_endian && !big_endian) \
|
|
{ printf("/* Type %s is stored LITTLE-ENDIAN in memory (i.e. like Z80 or VAX). */\n",typestr); \
|
|
printf("#define "); printf_underscored(&typestr[9]); printf("_little_endian\n"); \
|
|
} \
|
|
if (!big_endian && !little_endian) \
|
|
{ printf("#error \"Type %s is stored in memory in an obscure manner!!\"\n",typestr); } \
|
|
} \
|
|
else \
|
|
{ printf("#error \"Endianness makes no sense for t%spe %s !!\"\n","y",typestr); } \
|
|
}
|
|
get_endian(uchar,"unsigned char",uchar_bitsize);
|
|
get_endian(ushort,"unsigned short",ushort_bitsize);
|
|
get_endian(uint,"unsigned int",uint_bitsize);
|
|
get_endian(ulong,"unsigned long",ulong_bitsize);
|
|
#ifdef HAVE_LONGLONG
|
|
get_endian(ulonglong,"unsigned long long",ulonglong_bitsize);
|
|
#endif
|
|
printf("\n");
|
|
}
|
|
|
|
long get_stack_direction(void)
|
|
{ auto char dummy;
|
|
static char* dummyaddr = (char*)0;
|
|
if (!(dummyaddr == (char*)0))
|
|
{ return (&dummy) - dummyaddr; }
|
|
else
|
|
{ dummyaddr = &dummy;
|
|
{ long result = get_stack_direction();
|
|
/* The next assignment avoids tail recursion elimination (IRIX 6.4 CC). */
|
|
dummyaddr = (char*)0;
|
|
return result;
|
|
} }
|
|
}
|
|
|
|
void main10(void)
|
|
{ long stack_direction = get_stack_direction();
|
|
if (stack_direction > 0)
|
|
{ printf("/* Stack grows up, ca. %ld bytes per function call. */\n",(long)stack_direction);
|
|
printf("#define stack_grows_up\n");
|
|
}
|
|
else if (stack_direction < 0)
|
|
{ printf("/* Stack grows down, ca. %ld bytes per function call. */\n",-(long)stack_direction);
|
|
printf("#define stack_grows_down\n");
|
|
}
|
|
else
|
|
printf("#error \"Unknown stack model -- incorrect C semantics!!\"\n");
|
|
}
|
|
|
|
int main()
|
|
{ main1();
|
|
main2();
|
|
main3();
|
|
main4();
|
|
main5();
|
|
main6();
|
|
main7();
|
|
main8();
|
|
main9();
|
|
main10();
|
|
if (ferror(stdout)) return 1;
|
|
return 0;
|
|
}
|