view lphobos/typeinfo1/ti_float.d @ 1083:c1e9f612e2e2

Fix for dual operand form of fistp, also make reg ST(0) explicit and fix lindquists previous code that allowed dual operand form of fstp but dissallowed the single operand form accidently
author Kelly Wilson <wilsonk cpsc.ucalgary.ca>
date Tue, 10 Mar 2009 06:23:26 -0600
parents 373489eeaf90
children
line wrap: on
line source


// float

module typeinfo1.ti_float;

import std.gc: malloc;
class TypeInfo_f : TypeInfo
{
    char[] toString() { return "float"; }

    hash_t getHash(void *p)
    {
	return *cast(uint *)p;
    }

    static bool _isnan(float f)
    {
	return f !<>= 0;
    }

    static int _equals(float f1, float f2)
    {
	return f1 == f2 ||
		(_isnan(f1) && _isnan(f2));
    }

    static int _compare(float d1, float d2)
    {
	if (d1 !<>= d2)		// if either are NaN
	{
	    if (_isnan(d1))
	    {	if (_isnan(d2))
		    return 0;
		return -1;
	    }
	    return 1;
	}
	return (d1 == d2) ? 0 : ((d1 < d2) ? -1 : 1);
    }

    int equals(void *p1, void *p2)
    {
	return _equals(*cast(float *)p1, *cast(float *)p2);
    }

    int compare(void *p1, void *p2)
    {
	return _compare(*cast(float *)p1, *cast(float *)p2);
    }

    size_t tsize()
    {
	return float.sizeof;
    }

    void swap(void *p1, void *p2)
    {
	float t;

	t = *cast(float *)p1;
	*cast(float *)p1 = *cast(float *)p2;
	*cast(float *)p2 = t;
    }

    void[] init()
    {
	return (cast(float*)malloc(float.sizeof))[0..1];
    }
}