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ircd::simt: Add optimizations from cl_khr_subgroups support.

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This commit is contained in:
Jason Volk 2022-11-23 01:30:10 +00:00
parent 0fb7577066
commit 47e54547f9
3 changed files with 29 additions and 0 deletions
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9
include/ircd/simt/broadcast.h
View file

@ -33,6 +33,14 @@ inline void
ircd_simt_broadcast_flldr(__local float *const buf,
const uint ln,
const uint li)
#if defined(cl_khr_subgroups)
{
const float
ret = work_group_broadcast(buf[0], 0);
buf[li] = ret;
}
#else
{
barrier(CLK_LOCAL_MEM_FENCE);
@ -40,3 +48,4 @@ ircd_simt_broadcast_flldr(__local float *const buf,
buf[li] = buf[0];
}
#endif
#endif

10
include/ircd/simt/reduce_add.h
View file

@ -39,6 +39,15 @@ inline void
ircd_simt_reduce_add_flldr(__local float *const buf,
const uint ln,
const uint li)
#if defined(cl_khr_subgroups)
{
const float
ret = work_group_reduce_add(buf[li]);
if(li == 0)
buf[li] = ret;
}
#else
{
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
{
@ -52,6 +61,7 @@ ircd_simt_reduce_add_flldr(__local float *const buf,
buf[li] += buf[li + 2];
}
#endif
#endif
#ifdef __OPENCL_VERSION__
/// Sum all elements in the buffer. All threads in the group participate;

10
include/ircd/simt/reduce_max.h
View file

@ -19,6 +19,15 @@ inline void
ircd_simt_reduce_max_flldr(__local float *const buf,
const uint ln,
const uint li)
#if defined(cl_khr_subgroups)
{
const float
ret = work_group_reduce_max(buf[li]);
if(li == 0)
buf[li] = ret;
}
#else
{
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
{
@ -34,6 +43,7 @@ ircd_simt_reduce_max_flldr(__local float *const buf,
buf[li] = buf[li + 2];
}
#endif
#endif
#ifdef __OPENCL_VERSION__
inline void