Re: Is "-march=atom" deprecated?

[waltdnes at waltdnes dot org]

On Tue, Oct 04, 2016 at 10:50:45AM +0200, Mason wrote
> On 04/10/2016 00:40, waltdnes wrote:
> 
> > On Mon, Oct 03, 2016 at 11:06:13AM +0200, Mason wrote
> > 
> >> It does look like 'atom' and 'bonnell' are similar.
> >>
> >> I don't have 4.9 handy, try this:
> >>
> >> echo | gcc -xc -S -fverbose-asm -march=atom -o v1.s -
> >> echo | gcc -xc -S -fverbose-asm -march=bonnell -o v2.s -
> >> diff -u v1.s v2.s
> >>
> >> Maybe they are identical?
> > 
> >   Thanks for the idea.  I had to do it a bit differently to get it to
> > work.  I took a simple "Hello World" program, and ran...
> 
> For my personal education, can you tell me in what way the commands
> above failed to work? (You did copy the trailing dash, right?)

  Sorry, I goofed up somewhere, probably the trailing dash.  I tried
again, and this time it worked.  I got the following...

[i660][waltdnes][~] echo | gcc -xc -S -fverbose-asm -march=atom -o v1.s -
[i660][waltdnes][~] echo | gcc -xc -S -fverbose-asm -march=bonnell -o v2.s -
[i660][waltdnes][~] diff -u v1.s v2.s
--- v1.s        2016-10-04 10:08:05.484318802 -0400
+++ v2.s        2016-10-04 10:08:23.980319927 -0400
@@ -2,7 +2,7 @@
 # GNU C (Gentoo 4.9.3 p1.5, pie-0.6.4) version 4.9.3
 # (x86_64-pc-linux-gnu)
 #      compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR version 3.1.3-p4, MPC version 1.0.2
 # GGC heuristics: --param ggc-min-expand=100 --param
 # ggc-min-heapsize=131072
-# options passed:  - -march=atom -auxbase-strip v1.s -fverbose-asm
+# options passed:  - -march=bonnell -auxbase-strip v2.s -fverbose-asm
 # -fstack-protector-strong
 # options enabled:  -faggressive-loop-optimizations
 # -fasynchronous-unwind-tables -fauto-inc-dec -fcommon

-- 
Walter Dnes <waltdnes@waltdnes.org>