[9fans] 8c dying with out of fixed registers

["\"Nils O. Selåsdal\"" <noselasd@asgaard.homelinux.org>]

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=0x0 pc=0x00036d93

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 = T7;

	for (r = 1; r < 16; r++) {
		K1 =
		    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. Selåsdal