Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!ima!johnl From: johnl@ima.UUCP Newsgroups: net.lang.c Subject: Re: C cross compiler Message-ID: <475@ima.UUCP> Date: Sun, 10-Feb-85 23:39:54 EST Article-I.D.: ima.475 Posted: Sun Feb 10 23:39:54 1985 Date-Received: Tue, 12-Feb-85 05:52:00 EST Lines: 25 Nf-ID: #R:brl-tgr:-813700:ima:10100008:000:1086 Nf-From: ima!johnl Feb 10 22:24:00 1985 > IS there a good C cross compiler which will > produce 360-20 source assembly nmemonics? Oh, like, wow. Are there still 360/20s around? Now let's see, hmmn, the 360/20 can multiply in decimal but not in binary, so if you write this: struct foo { int a,b,c,d,e; } foo[100]; parp(foo[i]); it has to pick up the value of i, convert it to decimal, multiply it by 10 (which takes about a millisecond), convert it back to binary, add in the address of foo and you're ready to dereference. No, that's silly, we could do the multiplication by 10 by a decimal shift. No, even better, we can do it with an addition chain, so we load it into a register and add it to itself, then we move it to another register -- wait, can't do that because there's no load register instruction unless you've hacked the microcode that's loaded from the box of cards inside the back of the machine -- so you store that ... Well, anyway, I expect the answer is no C compiler for the 360/20. Sorry, you're still stuck with RPG, or maybe subset PL/I. John Levine, ima!johnl or Levine@YALE.ARPA