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Modify rt example to also do a set of runs with tasks + SPMD together.

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This commit is contained in:
Matt Pharr
2011-08-17 13:14:32 +01:00
parent d7662b3eb9
commit 60bdf1ef8a
7 changed files with 643 additions and 19 deletions
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59
examples/rt/rt.ispc
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@@ -226,20 +226,21 @@ bool BVHIntersect(const LinearBVHNode nodes[], const Triangle tris[],
}
export void raytrace(uniform int width, uniform int height,
const uniform float raster2camera[4][4],
const uniform float camera2world[4][4],
uniform float image[], uniform int id[],
const LinearBVHNode nodes[],
const Triangle triangles[]) {
static void raytrace_tile(uniform int x0, uniform int x1,
uniform int y0, uniform int y1, uniform int width,
const uniform float raster2camera[4][4],
const uniform float camera2world[4][4],
uniform float image[], uniform int id[],
const LinearBVHNode nodes[],
const Triangle triangles[]) {
static const uniform float udx[16] = { 0, 1, 0, 1, 2, 3, 2, 3,
0, 1, 0, 1, 2, 3, 2, 3 };
static const uniform float udy[16] = { 0, 0, 1, 1, 0, 0, 1, 1,
2, 2, 3, 3, 2, 2, 3, 3 };
// The outer loops are always over blocks of 4x4 pixels
for (uniform int y = 0; y < height; y += 4) {
for (uniform int x = 0; x < width; x += 4) {
for (uniform int y = y0; y < y1; y += 4) {
for (uniform int x = x0; x < x1; x += 4) {
// Now we have a block of 4x4=16 pixels to process; it will
// take 16/programCount iterations of this loop to process
// them.
@@ -261,3 +262,45 @@ export void raytrace(uniform int width, uniform int height,
}
}
}
export void raytrace_ispc(uniform int width, uniform int height,
const uniform float raster2camera[4][4],
const uniform float camera2world[4][4],
uniform float image[], uniform int id[],
const LinearBVHNode nodes[],
const Triangle triangles[]) {
raytrace_tile(0, width, 0, height, width, raster2camera, camera2world, image,
id, nodes, triangles);
}
task void raytrace_tile_task(uniform int x0, uniform int x1,
uniform int y0, uniform int y1, uniform int width,
const uniform float raster2camera[4][4],
const uniform float camera2world[4][4],
uniform float image[], uniform int id[],
const LinearBVHNode nodes[],
const Triangle triangles[]) {
raytrace_tile(x0, x1, y0, y1, width, raster2camera, camera2world, image,
id, nodes, triangles);
}
export void raytrace_ispc_tasks(uniform int width, uniform int height,
const uniform float raster2camera[4][4],
const uniform float camera2world[4][4],
uniform float image[], uniform int id[],
const LinearBVHNode nodes[],
const Triangle triangles[]) {
uniform int dx = 16, dy = 16;
for (uniform int y = 0; y < height; y += dy) {
uniform int y1 = min(y + dy, height);
for (uniform int x = 0; x < width; x += dx) {
uniform int x1 = min(x + dx, width);
launch < raytrace_tile_task(x, x1, y, y1, width, raster2camera,
camera2world, image, id, nodes,
triangles) >;
}
}
}