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authorAdrian Kummerlaender2019-06-12 20:25:38 +0200
committerAdrian Kummerlaender2019-06-12 20:25:38 +0200
commit1a7c31a135ad08781f8e4abdd8dec11c7395bba1 (patch)
treed3c9b26e2a39bdc2081f65bcf7355c7be13bb67d /template
parentecd3367ae9dc79381c563138ea03e9001bc04405 (diff)
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Move kernel template into separate file
Diffstat (limited to 'template')
-rw-r--r--template/kernel.mako105
1 files changed, 105 insertions, 0 deletions
diff --git a/template/kernel.mako b/template/kernel.mako
new file mode 100644
index 0000000..c43a0dc
--- /dev/null
+++ b/template/kernel.mako
@@ -0,0 +1,105 @@
+__constant float tau = ${tau};
+
+bool is_in_circle(float x, float y, float a, float b, float r) {
+ return sqrt(pow(x-a,2)+pow(y-b,2)) < r;
+}
+
+__kernel void equilibrilize(__global __write_only float* f_a,
+ __global __write_only float* f_b)
+{
+ const unsigned int gid = get_global_id(1)*${nX} + get_global_id(0);
+
+ __global __write_only float* preshifted_f_a = f_a + gid;
+ __global __write_only float* preshifted_f_b = f_b + gid;
+
+ if ( is_in_circle(get_global_id(0), get_global_id(1), ${nX//4}, ${nY//4}, ${nX//10})
+ || is_in_circle(get_global_id(0), get_global_id(1), ${nX//4}, ${nY-nY//4}, ${nX//10})
+ || is_in_circle(get_global_id(0), get_global_id(1), ${nX-nX//4}, ${nY//4}, ${nX//10})
+ || is_in_circle(get_global_id(0), get_global_id(1), ${nX-nX//4}, ${nY-nY//4}, ${nX//10}) ) {
+% for i, w_i in enumerate(w):
+ preshifted_f_a[${i*nCells}] = 1./24.f;
+ preshifted_f_b[${i*nCells}] = 1./24.f;
+% endfor
+ } else {
+% for i, w_i in enumerate(w):
+ preshifted_f_a[${i*nCells}] = ${w_i}.f;
+ preshifted_f_b[${i*nCells}] = ${w_i}.f;
+% endfor
+ }
+}
+
+<%
+def direction_index(c_i):
+ return (c_i[0]+1) + 3*(1-c_i[1])
+
+def neighbor_offset(c_i):
+ if c_i[1] == 0:
+ return c_i[0]
+ else:
+ return c_i[1]*nX + c_i[0]
+%>
+
+__kernel void collide_and_stream(__global __write_only float* f_a,
+ __global __read_only float* f_b,
+ __global __read_only int* material)
+{
+ const unsigned int gid = get_global_id(1)*${nX} + get_global_id(0);
+
+ const int m = material[gid];
+
+ if ( m == 0 ) {
+ return;
+ }
+
+ __global __write_only float* preshifted_f_a = f_a + gid;
+ __global __read_only float* preshifted_f_b = f_b + gid;
+
+% for i, c_i in enumerate(c):
+ const float f_curr_${i} = preshifted_f_b[${direction_index(c_i)*nCells + neighbor_offset(-c_i)}];
+% endfor
+
+% for i, expr in enumerate(moments_helper):
+ const float ${expr[0]} = ${ccode(expr[1])};
+% endfor
+
+% for i, expr in enumerate(moments_assignment):
+ float ${ccode(expr)}
+% endfor
+
+ if ( m == 2 ) {
+ u_0 = 0.0;
+ u_1 = 0.0;
+ }
+
+% for i, expr in enumerate(collide_helper):
+ const float ${expr[0]} = ${ccode(expr[1])};
+% endfor
+
+% for i, expr in enumerate(collide_assignment):
+ const float ${ccode(expr)}
+% endfor
+
+% for i in range(0,len(c)):
+ preshifted_f_a[${i*nCells}] = f_next_${i};
+% endfor
+}
+
+__kernel void collect_moments(__global __read_only float* f,
+ __global __write_only float* moments)
+{
+ const unsigned int gid = get_global_id(1)*${nX} + get_global_id(0);
+
+ __global __read_only float* preshifted_f = f + gid;
+
+% for i in range(0,len(c)):
+ const float f_curr_${i} = preshifted_f[${i*nCells}];
+% endfor
+
+% for i, expr in enumerate(moments_helper):
+ const float ${expr[0]} = ${ccode(expr[1])};
+% endfor
+
+% for i, expr in enumerate(moments_assignment):
+ moments[${i*nCells} + gid] = ${ccode(expr.rhs)};
+% endfor
+}