view lphobos/typeinfo2/ti_Aint.d @ 1047:6bb04dbee21f

Some calling convention work for x86-64: - Implement x86-64 extern(C), hopefully correctly. - Tried to be a bit smarter about extern(D) while I was there. Interestingly, this code seems to be generating more efficient code than gcc and llvm-gcc in some edge cases, like returning a `{ [7 x i8] }` loaded from a stack slot from an extern(C) function. (gcc generates 7 1-byte loads, while this code generates a 4-byte, a 2-byte and a 1-byte load) I also added some changes to make sure structs being returned from functions or passed in as parameters are stored in memory where the rest of the backend seems to expect them to be. These should be removed when support for first-class aggregates improves.
author Frits van Bommel <fvbommel wxs.nl>
date Fri, 06 Mar 2009 16:00:47 +0100
parents 362825278842
children
line wrap: on
line source

module typeinfo2.ti_Aint;

extern(C) int memcmp(void*,void*,size_t);

// int[]

class TypeInfo_Ai : TypeInfo
{
    char[] toString() { return "int[]"; }

    hash_t getHash(void *p)
    {	int[] s = *cast(int[]*)p;
	auto len = s.length;
	auto str = s.ptr;
	hash_t hash = 0;

	while (len)
	{
	    hash *= 9;
	    hash += *cast(uint *)str;
	    str++;
	    len--;
	}

	return hash;
    }

    int equals(void *p1, void *p2)
    {
	int[] s1 = *cast(int[]*)p1;
	int[] s2 = *cast(int[]*)p2;

	return s1.length == s2.length &&
	       memcmp(cast(void *)s1, cast(void *)s2, s1.length * int.sizeof) == 0;
    }

    int compare(void *p1, void *p2)
    {
	int[] s1 = *cast(int[]*)p1;
	int[] s2 = *cast(int[]*)p2;
	size_t len = s1.length;

	if (s2.length < len)
	    len = s2.length;
	for (size_t u = 0; u < len; u++)
	{
	    int result = s1[u] - s2[u];
	    if (result)
		return result;
	}
	return cast(int)s1.length - cast(int)s2.length;
    }

    size_t tsize()
    {
	return (int[]).sizeof;
    }

    uint flags()
    {
	return 1;
    }

    TypeInfo next()
    {
	return typeid(int);
    }
}

// uint[]

class TypeInfo_Ak : TypeInfo_Ai
{
    char[] toString() { return "uint[]"; }

    int compare(void *p1, void *p2)
    {
	uint[] s1 = *cast(uint[]*)p1;
	uint[] s2 = *cast(uint[]*)p2;
	size_t len = s1.length;

	if (s2.length < len)
	    len = s2.length;
	for (size_t u = 0; u < len; u++)
	{
	    int result = s1[u] - s2[u];
	    if (result)
		return result;
	}
	return cast(int)s1.length - cast(int)s2.length;
    }

    TypeInfo next()
    {
	return typeid(uint);
    }
}

// dchar[]

class TypeInfo_Aw : TypeInfo_Ak
{
    char[] toString() { return "dchar[]"; }

    TypeInfo next()
    {
	return typeid(dchar);
    }
}