Intel® ISA Extensions
Use hardware-based isolation and memory encryption to provide more code protection in your solutions.
1094 Discussions

fabs() and SIMD

threethazz
Beginner
‎06-16-2009 08:36 AM
597 Views
Hello, I've been seaching over the web and also intel foruns and I cannot find a version of fabs() function in SIMD....

I have a __m128 x variable and I want to get the absolute value of the 4 float values in x.

Sorry if this is a re-post, but I cannot really find anything concerning this topic.

thank you in advance,
threethazz.
0 Kudos

Link Copied

1 Reply
neni
New Contributor II
‎06-23-2009 03:11 PM
597 Views
sign bit in single prec FP is in bit 31, all you need to do is clearthis bitusing andps with a predefined mask of 4 x 0x7fffffff values

0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.