diff options
Diffstat (limited to 'aberth')
| -rw-r--r-- | aberth/aberth.cpp | 12 | ||||
| -rw-r--r-- | aberth/aberth_kernel.fut | 25 |
2 files changed, 22 insertions, 15 deletions
diff --git a/aberth/aberth.cpp b/aberth/aberth.cpp index 6936809..550760d 100644 --- a/aberth/aberth.cpp +++ b/aberth/aberth.cpp @@ -342,11 +342,12 @@ static vector<uint8_t> drawImage(int W, int H, const vector<int> &counts, int ma static vector<int32_t> invoke_kernel( int32_t width, int32_t height, - double left, double top, double right, double bottom, + Com bottomLeft, Com topRight, int32_t seed) { futhark_context_config *config = futhark_context_config_new(); // futhark_context_config_select_device_interactively(config); + futhark_context_config_set_debugging(config, 1); futhark_context *ctx = futhark_context_new(config); @@ -364,7 +365,8 @@ static vector<int32_t> invoke_kernel( check_ret(futhark_entry_main_all( ctx, &dest_arr, width, height, - left, top, right, bottom, + bottomLeft.real(), topRight.imag(), + topRight.real(), bottomLeft.imag(), seed)); check_ret(futhark_context_sync(ctx)); @@ -391,9 +393,9 @@ int main(int argc, char **argv) { if (argc <= 1) { // tie(W, H, counts) = computeCounts(); W = H = 2000; - Com bottomLeft = Com(-1.6, -1.6); - Com topRight = Com(1.6, 1.6); - counts = invoke_kernel(W, H, bottomLeft.real(), topRight.imag(), topRight.real(), bottomLeft.imag(), 42); + Com bottomLeft = Com(0, -1.6); + Com topRight = Com(1.6, 0); + counts = invoke_kernel(W, H, bottomLeft, topRight, 42); writeCounts(W, H, counts, "out.txt"); } else if (argc == 2) { tie(W, H, counts) = readCounts(argv[1]); diff --git a/aberth/aberth_kernel.fut b/aberth/aberth_kernel.fut index fae1450..58b8838 100644 --- a/aberth/aberth_kernel.fut +++ b/aberth/aberth_kernel.fut @@ -128,11 +128,13 @@ let calc_index (value: f64) (left: f64) (right: f64) (steps: i32): i32 = let point_index (width: i32) (height: i32) - (top_left: complex) (bottom_right: complex) + (bottom_left: complex) (top_right: complex) (pt: complex) : i32 = - let xi = calc_index (c64.re pt) (c64.re top_left) (c64.re bottom_right) width - let yi = calc_index (c64.im pt) (c64.im bottom_right) (c64.im top_left) height + -- Range for 'yi' is reversed because image coordinates go down in the y + -- direction, while complex coordinates go up in the y direction + let xi = calc_index (c64.re pt) (c64.re bottom_left) (c64.re top_right) width + let yi = calc_index (c64.im pt) (c64.im top_right) (c64.im bottom_left) height in if 0 <= xi && xi < width && 0 <= yi && yi < height then width * yi + xi else -1 @@ -145,16 +147,19 @@ entry main_job : []i32 = -- Unnecessary to give each polynomial a different seed let rng = rand_engine.rng_from_seed [seed] - let top_left = c64.mk left top - let bottom_right = c64.mk right bottom - let indices = filter (\i -> i != -1) (flatten + let bottom_left = c64.mk left bottom + let top_right = c64.mk right top + let indices = flatten (map (\idx -> let p = derbyshire_at_index idx let (_, pts) = aberth.aberth p rng - let indices = map (point_index width height top_left bottom_right) pts - in indices) - (start_index ..< start_index + num_polys))) - in reduce_by_index (replicate (width * height) 0) (+) 0 indices (replicate (length indices) 1) + in map (point_index width height bottom_left top_right) pts) + (start_index ..< start_index + num_polys)) + let filtered = filter (\i -> i != -1) indices + in reduce_by_index (replicate (width * height) 0) + (+) 0 + filtered + (replicate (length filtered) 1) entry main_all (width: i32) (height: i32) |