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ircd::simt: Simplify interface; internalize workitem functions.

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This commit is contained in:
Jason Volk 2021-04-15 10:07:17 -07:00
parent 075b40400a
commit bc98835b3c
6 changed files with 45 additions and 31 deletions
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8
include/ircd/simt/broadcast.h
View file

@ -11,10 +11,12 @@
/// Broadcast originating from the local leader (index [0]). All threads in the
/// group participate.
inline void
ircd_simt_broadcast_f4lldr(__local float4 *const buf,
const uint ln,
const uint li)
ircd_simt_broadcast_f4lldr(__local float4 *const buf)
{
const uint
li = get_local_id(0),
ln = get_local_size(0);
for(uint stride = 1; stride < ln; stride <<= 1)
{
if(li < stride)

24
include/ircd/simt/mean.h
View file

@ -10,20 +10,24 @@
/// Compute average of all elements in the input. The result is broadcast
/// to all elements of the output.
///
/// provide:
/// li = local thread id
/// ln = local group size
///
inline void
ircd_simt_math_mean_f4lldr(__local float4 *const restrict out,
__local const float4 *const restrict in,
const uint num,
const uint i)
__local const float4 *const restrict in)
{
out[i] = in[i];
ircd_simt_reduce_add_f4lldr(out, num, i);
const uint
li = get_local_id(0),
ln = get_local_size(0);
if(i == 0)
out[i][0] = ircd_simt_reduce_add_f4(out[i]);
out[li] = in[li];
ircd_simt_reduce_add_f4lldr(out);
if(i == 0)
out[i] = out[i][0] / (num * 4);
if(li == 0)
out[li] = ircd_simt_reduce_add_f4(out[li]) / (ln * 4);
ircd_simt_broadcast_f4lldr(out, num, i);
ircd_simt_broadcast_f4lldr(out);
}

20
include/ircd/simt/norm.h
View file

@ -13,21 +13,23 @@
inline void
ircd_simt_math_norm_f4lldr(__local float4 *const out,
__local const float4 *const in,
__local float4 *const restrict tmp,
const uint num,
const uint i)
__local float4 *const restrict tmp)
{
ircd_simt_math_mean_f4lldr(tmp, in, num, i);
const uint
li = get_local_id(0),
ln = get_local_size(0);
ircd_simt_math_mean_f4lldr(tmp, in);
const float4
sub_mean = in[i] - tmp[i];
sub_mean = in[li] - tmp[li];
tmp[i] = pow(sub_mean, 2);
ircd_simt_math_mean_f4lldr(out, tmp, num, i);
tmp[li] = pow(sub_mean, 2);
ircd_simt_math_mean_f4lldr(out, tmp);
const float4
epsilon = 0.00001f,
s = sqrt(out[i] + epsilon);
s = sqrt(out[li] + epsilon);
out[i] = sub_mean / s;
out[li] = sub_mean / s;
}

8
include/ircd/simt/reduce_add.h
View file

@ -11,10 +11,12 @@
/// Sum all elements in the buffer. All threads in the group participate;
/// result is placed in index [0], the rest of the buffer is trashed.
inline void
ircd_simt_reduce_add_f4lldr(__local float4 *const buf,
const uint ln,
const uint li)
ircd_simt_reduce_add_f4lldr(__local float4 *const buf)
{
const uint
li = get_local_id(0),
ln = get_local_size(0);
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
{
barrier(CLK_LOCAL_MEM_FENCE);

8
include/ircd/simt/reduce_max.h
View file

@ -12,10 +12,12 @@
/// the greatest value is placed in index [0], the rest of the buffer is
/// trashed.
inline void
ircd_simt_reduce_max_flldr(__local float *const buf,
const uint ln,
const uint li)
ircd_simt_reduce_max_flldr(__local float *const buf)
{
const uint
li = get_local_id(0),
ln = get_local_size(0);
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
{
barrier(CLK_LOCAL_MEM_FENCE);

8
include/ircd/simt/sort.h
View file

@ -11,10 +11,12 @@
/// Sort indices in `idx` which point to values contained in `val`.
inline void
ircd_simt_sort_idx16_flldr(__local ushort *const idx,
__global const float *const val,
const uint ln,
const uint li)
__global const float *const val)
{
const uint
li = get_local_id(0),
ln = get_local_size(0);
for(uint stride = ln >> 1; stride > 0; stride >>= 1)
{
barrier(CLK_LOCAL_MEM_FENCE);