view test/assign.d @ 131:5825d48b27d1 trunk

[svn r135] * Merged DMD 1.025 * * Fixed a minor linking order mishap * * Added an command line option -annotate * * Fixed some problems with running optimizations * * Added std.stdio and dependencies to lphobos (still not 100% working, but compiles and links) * * Fixed problems with passing aggregate types to variadic functions * * Added initial code towards full GC support, currently based on malloc and friends, not all the runtime calls the GC yet for memory * * Fixed problems with resolving nested function context pointers for some heavily nested cases * * Redid function argument passing + other minor code cleanups, still lots to do on this end... *
author lindquist
date Fri, 04 Jan 2008 01:38:42 +0100
parents c53b6e3fe49a
children
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line source

module assign;

// this is taken from std.intrinsic from gdc

int mybtc(uint *p, uint bitnum)
{
    uint * q = p + (bitnum / (uint.sizeof*8));
    uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1));
    int result = *q & mask;
    *q ^= mask;
    return result ? -1 : 0;
}

void main()
{
    uint i = 0xFFFF_FFFF;
    int r = mybtc(&i, 31);
    assert(r);
    assert(i == 0x7FFF_FFFF);
    r = mybtc(&i, 31);
    assert(!r);
    assert(i == 0xFFFF_FFFF);
}