integer_functions.py 4.47 KB
 Martin Bauer committed May 11, 2018 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 ``````import sympy as sp from pystencils.data_types import get_type_of_expression, collate_types from pystencils.sympyextensions import is_integer_sequence bitwise_xor = sp.Function("bitwise_xor") bit_shift_right = sp.Function("bit_shift_right") bit_shift_left = sp.Function("bit_shift_left") bitwise_and = sp.Function("bitwise_and") bitwise_or = sp.Function("bitwise_or") # noinspection PyPep8Naming class modulo_floor(sp.Function): """Returns the next smaller integer divisible by given divisor. Examples: >>> modulo_floor(9, 4) 8 >>> modulo_floor(11, 4) 8 >>> modulo_floor(12, 4) 12 >>> from pystencils import TypedSymbol >>> a, b = TypedSymbol("a", "int64"), TypedSymbol("b", "int32") >>> modulo_floor(a, b).to_c(str) '(int64_t)((a) / (b)) * (b)' """ nargs = 2 def __new__(cls, integer, divisor): if is_integer_sequence((integer, divisor)): return (int(integer) // int(divisor)) * divisor else: return super().__new__(cls, integer, divisor) def to_c(self, print_func): dtype = collate_types((get_type_of_expression(self.args[0]), get_type_of_expression(self.args[1]))) assert dtype.is_int() return "({dtype})(({0}) / ({1})) * ({1})".format(print_func(self.args[0]), print_func(self.args[1]), dtype=dtype) `````` Martin Bauer committed May 13, 2018 42 43 44 45 `````` # noinspection PyPep8Naming class modulo_ceil(sp.Function): `````` Martin Bauer committed Jun 05, 2018 46 `````` """Returns the next bigger integer divisible by given divisor. `````` Martin Bauer committed May 13, 2018 47 48 49 50 51 52 53 54 55 56 57 `````` Examples: >>> modulo_ceil(9, 4) 12 >>> modulo_ceil(11, 4) 12 >>> modulo_ceil(12, 4) 12 >>> from pystencils import TypedSymbol >>> a, b = TypedSymbol("a", "int64"), TypedSymbol("b", "int32") >>> modulo_ceil(a, b).to_c(str) `````` Martin Bauer committed Jun 07, 2018 58 `````` '((a) % (b) == 0 ? a : ((int64_t)((a) / (b))+1) * (b))' `````` Martin Bauer committed May 13, 2018 59 60 61 62 63 64 65 66 67 68 69 70 `````` """ nargs = 2 def __new__(cls, integer, divisor): if is_integer_sequence((integer, divisor)): return integer if integer % divisor == 0 else ((integer // divisor) + 1) * divisor else: return super().__new__(cls, integer, divisor) def to_c(self, print_func): dtype = collate_types((get_type_of_expression(self.args[0]), get_type_of_expression(self.args[1]))) assert dtype.is_int() `````` Martin Bauer committed Jun 05, 2018 71 `````` code = "(({0}) % ({1}) == 0 ? {0} : (({dtype})(({0}) / ({1}))+1) * ({1}))" `````` Martin Bauer committed May 13, 2018 72 `````` return code.format(print_func(self.args[0]), print_func(self.args[1]), dtype=dtype) `````` Martin Bauer committed Oct 19, 2018 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 `````` # noinspection PyPep8Naming class div_ceil(sp.Function): """Integer division that is always rounded up Examples: >>> div_ceil(9, 4) 3 >>> div_ceil(8, 4) 2 >>> from pystencils import TypedSymbol >>> a, b = TypedSymbol("a", "int64"), TypedSymbol("b", "int32") >>> div_ceil(a, b).to_c(str) '( (a) % (b) == 0 ? (int64_t)(a) / (int64_t)(b) : ( (int64_t)(a) / (int64_t)(b) ) +1 )' """ nargs = 2 def __new__(cls, integer, divisor): if is_integer_sequence((integer, divisor)): return integer // divisor if integer % divisor == 0 else (integer // divisor) + 1 else: return super().__new__(cls, integer, divisor) def to_c(self, print_func): dtype = collate_types((get_type_of_expression(self.args[0]), get_type_of_expression(self.args[1]))) assert dtype.is_int() code = "( ({0}) % ({1}) == 0 ? ({dtype})({0}) / ({dtype})({1}) : ( ({dtype})({0}) / ({dtype})({1}) ) +1 )" return code.format(print_func(self.args[0]), print_func(self.args[1]), dtype=dtype) `````` Martin Bauer committed Apr 24, 2019 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 `````` # noinspection PyPep8Naming class div_floor(sp.Function): """Integer division Examples: >>> div_floor(9, 4) 2 >>> div_floor(8, 4) 2 >>> from pystencils import TypedSymbol >>> a, b = TypedSymbol("a", "int64"), TypedSymbol("b", "int32") >>> div_floor(a, b).to_c(str) '((int64_t)(a) / (int64_t)(b))' """ nargs = 2 def __new__(cls, integer, divisor): if is_integer_sequence((integer, divisor)): return integer // divisor else: return super().__new__(cls, integer, divisor) def to_c(self, print_func): dtype = collate_types((get_type_of_expression(self.args[0]), get_type_of_expression(self.args[1]))) assert dtype.is_int() code = "(({dtype})({0}) / ({dtype})({1}))" return code.format(print_func(self.args[0]), print_func(self.args[1]), dtype=dtype)``````