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Re: PATCH: ARM VFP test


Paul Brook wrote:
2005-04-22 Mark Mitchell <mark@codesourcery.com>

* gcc.dg/arm-vfp1.c: New test.

Index: gcc.dg/arm-vfp1.c
===================================================================
RCS file: gcc.dg/arm-vfp1.c
diff -N gcc.dg/arm-vfp1.c
*** /dev/null	1 Jan 1970 00:00:00 -0000
--- gcc.dg/arm-vfp1.c	22 Apr 2005 17:56:11 -0000
***************
*** 0 ****
--- 1,126 ----
+ /* { dg-do compile { target arm*-*-* } } */
+ /* { dg-options "-O2 -ffast-math -mfpu=vfp -mfloat-abi=softfp" } */


Why -ffast-math?
The vfp multiply-accumulate instructions correctly round the intermediate result, so we should be using them all the time.

Mostly, I did that just so I didn't get myself confused looking at the fixup code we generate for sqrt. Want me to rip it out?


--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304


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