From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <427BCCB2.8000607@asgaard.homelinux.org>
Date: Fri,  6 May 2005 21:59:46 +0200
From: =?UTF-8?B?Ik5pbHMgTy4gU2Vsw6VzZGFsIg==?= <noselasd@asgaard.homelinux.org>
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To: 9fans@cse.psu.edu
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Subject: [9fans] 8c dying with out of fixed registers
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Hello,
I've been trying to compile some crypto code, and it seems 8c
isn't always too happy about it. I eventually got the monster ting
reduced to the below (now very-nonsense code) snippet which dies with;
a.c:22 out of fixed registers
8c 2655: suicide: sys: trap: fault read addr=3D0x0 pc=3D0x00036d93

So, for anyone that's bored, and wants to fix the compiler:
#include <u.h>

static uvlong T7[256];

void f(unsigned char *key)
{
	uvlong K1;
	int r;
	uvlong *S =3D T7;

	for (r =3D 1; r < 16; r++) {
		K1 =3D
		    T7[S[(int)(K1 >> 56)       ] & 0xff] ^
		    T7[(int)S[(int)(K1 >> 48) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1 >> 40) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1 >> 32) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1 >> 24) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1 >> 16) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1 >>  8) & 0xff] & 0xff] ^
		    T7[(int)S[(int)(K1      ) & 0xff] & 0xff];
	}
}


In the mean time, I'll rewrite the piece of code...

--
Nils O. Sel=C3=A5sdal