Ticket #256: fdivfsubreverse.patch

File fdivfsubreverse.patch, 1.3 kB (added by ChristianK, 3 years ago)
Here's a patch against asm-x86-32. It passes the revised dstress tests. Are there any other asm opcodes that need this treatment?

a/gen/asm-x86-32.h

old	new
1886	1886	}
1887	1887	break;
1888	1888	default:
	1889	// special case fdiv, fsub: see dmd 840, ldc 256
	1890	if (strncmp(mnemonic, "fsub", 4) == 0 \|\|
	1891	strncmp(mnemonic, "fdiv", 4) == 0)
	1892	{
	1893	if (mnemonic[4] == 'r')
	1894	{
	1895	insnTemplate.write(mnemonic, 4);
	1896	insnTemplate.write(mnemonic+5, strlen(mnemonic)-5);
	1897	}
	1898	else
	1899	{
	1900	insnTemplate.write(mnemonic, 4) << "r";
	1901	insnTemplate.write(mnemonic+4, strlen(mnemonic)-4);
	1902	}
	1903	}
	1904	else
	1905	{
1889	1906	insnTemplate << mnemonic;
1890		if ( type_char )
1891		insnTemplate << type_char;
1892		break;
	1907	}
	1908	if ( type_char )
	1909	insnTemplate << type_char;
	1910	break;
1893	1911	}
1894	1912
1895	1913	switch ( opInfo->implicitClobbers & Clb_DXAX_Mask )