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Update examples: bulk task launch in stencil/mandelbrot, use foreach more.

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This commit is contained in:
Matt Pharr
2011-12-10 11:11:05 -08:00
parent 0b2febcec0
commit 034507a35b
2 changed files with 37 additions and 57 deletions
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38
examples/mandelbrot_tasks/mandelbrot.ispc
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@@ -49,19 +49,18 @@ mandel(float c_re, float c_im, int count) {
}
/* Task to compute the Mandelbrot iterations for a span of scanlines from
[ystart,yend).
/* Task to compute the Mandelbrot iterations for a single scanline.
*/
task void
mandelbrot_scanlines(uniform int ybase, uniform int span,
uniform float x0, uniform float dx,
uniform float y0, uniform float dy,
uniform int width, uniform int maxIterations,
uniform int output[]) {
uniform int ystart = ybase + taskIndex * span;
uniform int yend = ystart + span;
mandelbrot_scanline(uniform float x0, uniform float dx,
uniform float y0, uniform float dy,
uniform int width, uniform int height,
uniform int span,
uniform int maxIterations, uniform int output[]) {
uniform int y0 = taskIndex * span;
uniform int y1 = min((taskIndex+1) * span, height);
foreach (yi = ystart ... yend, xi = 0 ... width) {
foreach (yi = y0 ... y1, xi = 0 ... width) {
float x = x0 + xi * dx;
float y = y0 + yi * dy;
@@ -71,20 +70,6 @@ mandelbrot_scanlines(uniform int ybase, uniform int span,
}
task void
mandelbrot_chunk(uniform float x0, uniform float dx,
uniform float y0, uniform float dy,
uniform int width, uniform int height,
uniform int maxIterations, uniform int output[]) {
uniform int ystart = taskIndex * (height/taskCount);
uniform int yend = (taskIndex+1) * (height/taskCount);
uniform int span = 1;
launch[(yend-ystart)/span] < mandelbrot_scanlines(ystart, span, x0, dx, y0, dy,
width, maxIterations, output) >;
}
export void
mandelbrot_ispc(uniform float x0, uniform float y0,
uniform float x1, uniform float y1,
@@ -92,7 +77,8 @@ mandelbrot_ispc(uniform float x0, uniform float y0,
uniform int maxIterations, uniform int output[]) {
uniform float dx = (x1 - x0) / width;
uniform float dy = (y1 - y0) / height;
uniform int span = 4;
launch[32] < mandelbrot_chunk(x0, dx, y0, dy, width, height,
maxIterations, output) >;
launch[height/span] < mandelbrot_scanline(x0, dx, y0, dy, width, height, span,
maxIterations, output) >;
}