On my x86_64 machine:

#include <stdio.h>

#define ALIGN_BITS      (sizeof (void *) >> 1LL)
#define BIT_BITS         3LL
#define BYTE_BITS       14LL
#define SLOT_BITS       (sizeof (void *) * 8) - (ALIGN_BITS + BIT_BITS
+ + BYTE_BITS)
#define BYTES_PER_SLOT  1LL << BYTE_BITS
#define TRACKING_SLOTS  8192


int check_new (unsigned long long p)
{
    unsigned long long slot = (p >> (BYTE_BITS  + BIT_BITS + ALIGN_BIT
+S));
    unsigned long long byte = (p >> (ALIGN_BITS + BIT_BITS)) & 0x00003
+fffLL;
    unsigned long long bit  = (p >>  ALIGN_BITS)             & 0x00000
+007LL;
    unsigned long long nop  =  p & 0x3LL;

    printf ("address: %012p slot: %012p byte: %4x bit: %4x nop: %x\n",
        p, slot, byte, bit, nop);
    return (1);
    } /* check_new */

int main (int argc, char *argv[])
{
    unsigned long long p;

    for (p = 123456LL; p < (1ULL << 34); p += (1ULL << 29))
        check_new (p);
    } /* main */

[download]

Yields

ELF 64-bit LSB executable, x86-64, version 1 (SYSV), for GNU/Linux 2.6
+.4, dynamically linked (uses shared libs), not stripped

address: 0x000001e240 slot:        (nil) byte:  3c4 bit:    4 nop: 0
address: 0x002001e240 slot: 0x0000000100 byte:  3c4 bit:    4 nop: 0
address: 0x004001e240 slot: 0x0000000200 byte:  3c4 bit:    4 nop: 0
address: 0x006001e240 slot: 0x0000000300 byte:  3c4 bit:    4 nop: 0
address: 0x008001e240 slot: 0x0000000400 byte:  3c4 bit:    4 nop: 0
address: 0x00a001e240 slot: 0x0000000500 byte:  3c4 bit:    4 nop: 0
address: 0x00c001e240 slot: 0x0000000600 byte:  3c4 bit:    4 nop: 0
address: 0x00e001e240 slot: 0x0000000700 byte:  3c4 bit:    4 nop: 0
address: 0x010001e240 slot: 0x0000000800 byte:  3c4 bit:    4 nop: 0
address: 0x012001e240 slot: 0x0000000900 byte:  3c4 bit:    4 nop: 0
address: 0x014001e240 slot: 0x0000000a00 byte:  3c4 bit:    4 nop: 0
address: 0x016001e240 slot: 0x0000000b00 byte:  3c4 bit:    4 nop: 0
address: 0x018001e240 slot: 0x0000000c00 byte:  3c4 bit:    4 nop: 0
address: 0x01a001e240 slot: 0x0000000d00 byte:  3c4 bit:    4 nop: 0
address: 0x01c001e240 slot: 0x0000000e00 byte:  3c4 bit:    4 nop: 0
address: 0x01e001e240 slot: 0x0000000f00 byte:  3c4 bit:    4 nop: 0
address: 0x020001e240 slot: 0x0000001000 byte:  3c4 bit:    4 nop: 0
address: 0x022001e240 slot: 0x0000001100 byte:  3c4 bit:    4 nop: 0
address: 0x024001e240 slot: 0x0000001200 byte:  3c4 bit:    4 nop: 0
address: 0x026001e240 slot: 0x0000001300 byte:  3c4 bit:    4 nop: 0
address: 0x028001e240 slot: 0x0000001400 byte:  3c4 bit:    4 nop: 0
address: 0x02a001e240 slot: 0x0000001500 byte:  3c4 bit:    4 nop: 0
address: 0x02c001e240 slot: 0x0000001600 byte:  3c4 bit:    4 nop: 0
address: 0x02e001e240 slot: 0x0000001700 byte:  3c4 bit:    4 nop: 0
address: 0x030001e240 slot: 0x0000001800 byte:  3c4 bit:    4 nop: 0
address: 0x032001e240 slot: 0x0000001900 byte:  3c4 bit:    4 nop: 0
address: 0x034001e240 slot: 0x0000001a00 byte:  3c4 bit:    4 nop: 0
address: 0x036001e240 slot: 0x0000001b00 byte:  3c4 bit:    4 nop: 0
address: 0x038001e240 slot: 0x0000001c00 byte:  3c4 bit:    4 nop: 0
address: 0x03a001e240 slot: 0x0000001d00 byte:  3c4 bit:    4 nop: 0
address: 0x03c001e240 slot: 0x0000001e00 byte:  3c4 bit:    4 nop: 0
address: 0x03e001e240 slot: 0x0000001f00 byte:  3c4 bit:    4 nop: 0

[download]

That was what you were looking for?


Enjoy, Have FUN! H.Merijn

In reply to Re^3: 64-bit *nix/gcc expertise required by Tux
in thread 64-bit *nix/gcc expertise required (THIS IS NOT OFF TOPIC!) by BrowserUk

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