Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!ptsfa!ihnp4!alberta!auvax!rwa
From: rwa@auvax.UUCP (Ross Alexander)
Newsgroups: comp.arch
Subject: 32-bit CPUs ( NEC V70 ) and silly examples
Message-ID: <162@auvax.UUCP>
Date: Sat, 9-May-87 00:48:43 EDT
Article-I.D.: auvax.162
Posted: Sat May  9 00:48:43 1987
Date-Received: Sun, 10-May-87 09:16:23 EDT
References: <3810030@nucsrl.UUCP> <491@necis.UUCP> <3530@spool.WISC.EDU> <4016@necntc.NEC.COM>
Organization: Athabasca U., Alberta, Canada
Lines: 42
Keywords: V60, V70, silly examples
Summary: oh, really? I suppose you do that all the time.

In article <4016@necntc.NEC.COM>, pec@necntc.NEC.COM (Paul Cohen) writes:
> 		_______________________________________________
> 		| struct sttyp {
> 		|	unsigned first, second, third;
> 		|	struct sttyp *fourth;
> 		|	double fifth, a,b,c,d,e;} *stru
> C code:		|
> 		|
> 		| stru->fourth->fourth->third = 2;
> 		|==============================================
> 		| mov.w _stru+0xc,r0	# &(stru->fourth) in R0
> Assembly Code:	|
> 		| mov.w #2,0x8[0xc[r0]]	# stru->fourth->
> 		|			#    fourth->third = 2;
> 		|______________________________________________
> No doubt about it, the V70 is a complex chip; it is also fast.  It packs 
> a great deal of functionality to provide high performance at a reasonable 
> cost in a real system.  


I don't want to rain on anybody's parade, especially on such tenuous
evidence as this...  but how often do you, dear reader, write
'w->x->x->z = 2;' ?  perhaps not very often ?  Or another way of
phrasing this might be:  "your machine is a _h*ll_ of a lot smarter
than I am !".  Now quite honestly, I am no great screaming h*ll as far
as brains go (you may quote me on that :-} ) but the example has a
contrived feel to it; perhaps some statistical analysis of C
frequencies (i.e., real usage) would be apropos in justifiying the
significance of the above ?  

But I would love to believe that new horizons of speed and efficiency are
just waiting for me!  please don't take the above mild reproof as a wild
flame.  I just want to hear some real, informed, constructive information
on the chip.  And your information is very tantalizing.  It's just
not very significant, and that bothers me.

...!ihnp4!alberta!auvax!rwa		Ross Alexander, Athabasca University

snappy quote: (very roughly) "the set of all sets is disallowed"
(Russel, Lord Whitehead);  "oh, really ?!" (Kurt Goedel).

[ I don't claim to understand the above, my cats did it... I wish I did ]