Source code for pyfr.backends.openmp.generator

# -*- coding: utf-8 -*-

from pyfr.backends.base.generator import BaseKernelGenerator


[docs]class OpenMPKernelGenerator(BaseKernelGenerator):
[docs] def render(self): if self.ndim == 1: inner = ''' int cb, ce; loop_sched_1d(_nx, align, &cb, &ce); int nci = ((ce - cb) / SOA_SZ)*SOA_SZ; for (int _xi = cb; _xi < cb + nci; _xi += SOA_SZ) {{ #pragma omp simd for (int _xj = 0; _xj < SOA_SZ; _xj++) {{ {body} }} }} for (int _xi = cb + nci, _xj = 0; _xj < ce - _xi; _xj++) {{ {body} }}'''.format(body=self.body) else: inner = ''' int rb, re, cb, ce; loop_sched_2d(_ny, _nx, align, &rb, &re, &cb, &ce); int nci = ((ce - cb) / SOA_SZ)*SOA_SZ; for (int _y = rb; _y < re; _y++) {{ for (int _xi = cb; _xi < cb + nci; _xi += SOA_SZ) {{ #pragma omp simd for (int _xj = 0; _xj < SOA_SZ; _xj++) {{ {body} }} }} for (int _xi = cb + nci, _xj = 0; _xj < ce - _xi; _xj++) {{ {body} }} }}'''.format(body=self.body) return '''{spec} {{ #define X_IDX (_xi + _xj) #define X_IDX_AOSOA(v, nv)\ ((_xi/SOA_SZ*(nv) + (v))*SOA_SZ + _xj) int align = PYFR_ALIGN_BYTES / sizeof(fpdtype_t); #pragma omp parallel {{ {inner} }} #undef X_IDX #undef X_IDX_AOSOA }}'''.format(spec=self._render_spec(), inner=inner)
[docs] def _render_spec(self): # We first need the argument list; starting with the dimensions kargs = ['int ' + d for d in self._dims] # Now add any scalar arguments kargs.extend('{0.dtype} {0.name}'.format(sa) for sa in self.scalargs) # Finally, add the vector arguments for va in self.vectargs: # Views if va.isview: kargs.append('{0.dtype}* __restrict__ {0.name}_v'.format(va)) kargs.append('const int* __restrict__ {0.name}_vix' .format(va)) if va.ncdim == 2: kargs.append('const int* __restrict__ {0.name}_vrstri' .format(va)) # Arrays else: # Intent in arguments should be marked constant const = 'const' if va.intent == 'in' else '' kargs.append('{0} {1.dtype}* __restrict__ {1.name}_v' .format(const, va).strip()) if self.needs_ldim(va): kargs.append('int ld{0.name}'.format(va)) return 'void {0}({1})'.format(self.name, ', '.join(kargs))