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-rw-r--r--codegen_lbm.py110
-rw-r--r--template/kernel.mako105
2 files changed, 106 insertions, 109 deletions
diff --git a/codegen_lbm.py b/codegen_lbm.py
index e1906dc..7940b60 100644
--- a/codegen_lbm.py
+++ b/codegen_lbm.py
@@ -13,114 +13,6 @@ import lbm_d2q9 as D2Q9
from mako.template import Template
-kernel = """
-__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
-}"""
-
-
class D2Q9_BGK_Lattice:
def idx(self, x, y):
return y * self.nX + x;
@@ -160,7 +52,7 @@ class D2Q9_BGK_Lattice:
self.np_material[self.idx(x,y)] = 1
def build_kernel(self):
- program_src = Template(kernel).render(
+ program_src = Template(filename = './template/kernel.mako').render(
nX = self.nX,
nY = self.nY,
nCells = self.nCells,
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
+}