A DESCRIPTION OF THE REQUEST :
Almost all C-compilers available are able to vectorize code, so that simple code in loops for example can be processed in parallel by using the SIMD registers of modern CPUs like SSE1/2 or AltiVec.

Hotspot-server still uses SSE only for batch-procession of fpu-operations and it would be great if hotspot would be also able to optimize this caseses since it sometimes can even double performance.

JUSTIFICATION :
to archive higher performance on algorythmic code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
code like this should be vectorized:

int x;
int[] a = new int[10000];
for(int i=0; i < a.length; i++)
{
  x += a[i];
}
ACTUAL -
the generated code does not make any use of SIMD commands

CUSTOMER SUBMITTED WORKAROUND :
Write C libraries which handle all the complex stuff and write java-code just for the stuff arround itl
Posted Date : 2005-10-24 17:20:02.0

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This is critical for demanding applications like 3d or other complex games.