A DESCRIPTION OF THE PROBLEM :
The Math class lacks intrinsic implementations of the double precision fp rounding methods: ceil, floor, rint.
On x86 SSE/AVX systems; It would be preferable to utilize instructions 'roundsd' rather than the default jdk implementation.
Since there's also a packed variation, '(v)roundpd', the use of intrinsics may enable auto-vectorization where currently such optimization is obstructed by the default implementations of Math.ceil, floor, rint.
The Math class lacks intrinsic implementations of the double precision fp rounding methods: ceil, floor, rint.
On x86 SSE/AVX systems; It would be preferable to utilize instructions 'roundsd' rather than the default jdk implementation.
Since there's also a packed variation, '(v)roundpd', the use of intrinsics may enable auto-vectorization where currently such optimization is obstructed by the default implementations of Math.ceil, floor, rint.
- relates to
-
JDK-8226721 Missing intrinsics for Math.ceil, floor, rint
-
- Resolved
-