From 9da1b126cc017e14035b94c4615d211e5bc4bb21 Mon Sep 17 00:00:00 2001 From: "Kartik K. Agaram" Date: Fri, 17 Apr 2015 09:56:04 -0700 Subject: 1072 --- cpp/022array | 157 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 cpp/022array (limited to 'cpp/022array') diff --git a/cpp/022array b/cpp/022array new file mode 100644 index 00000000..9c2f1439 --- /dev/null +++ b/cpp/022array @@ -0,0 +1,157 @@ +//: Arrays contain a variable number of elements of the same type. +:(scenario copy_array) +# Arrays can be copied around with a single instruction just like integers, +# no matter how large they are. +recipe main [ + 1:integer <- copy 3:literal + 2:integer <- copy 14:literal + 3:integer <- copy 15:literal + 4:integer <- copy 16:literal + 5:array:integer <- copy 1:array:integer +] ++run: instruction main/4 ++run: ingredient 0 is 1 ++mem: location 1 is 3 ++mem: location 2 is 14 ++mem: location 3 is 15 ++mem: location 4 is 16 ++mem: storing 3 in location 5 ++mem: storing 14 in location 6 ++mem: storing 15 in location 7 ++mem: storing 16 in location 8 + +//: disable the size mismatch check since the destination array need not be initialized +:(replace "if (size_of(x) != data.size())" following "void write_memory(reagent x, vector data)") +if (x.types[0] != Type_number["array"] && size_of(x) != data.size()) +:(after "size_t size_of(const reagent& r)") + static const int ARRAY = Type_number["array"]; + if (r.types[0] == ARRAY) { + assert(r.types.size() > 1); + // skip the 'array' type to get at the element type + return 1 + Memory[r.value]*size_of(array_element(r.types)); + } + +//: array elements are accessed using 'index' +:(scenario "index") +recipe main [ + 1:integer <- copy 3:literal + 2:integer <- copy 14:literal + 3:integer <- copy 15:literal + 4:integer <- copy 16:literal + 5:integer <- index 1:array:integer, 0:literal +] ++run: instruction main/4 ++run: address to copy is 2 ++run: its type is 1 ++mem: location 2 is 14 ++run: product 0 is 14 ++mem: storing 14 in location 5 + +//: array elements are accessed using 'index' +:(scenario "index_direct_offset") +recipe main [ + 1:integer <- copy 3:literal + 2:integer <- copy 14:literal + 3:integer <- copy 15:literal + 4:integer <- copy 16:literal + 5:integer <- copy 0:literal + 6:integer <- index 1:array:integer, 5:integer +] ++run: instruction main/5 ++run: address to copy is 2 ++run: its type is 1 ++mem: location 2 is 14 ++run: product 0 is 14 ++mem: storing 14 in location 6 + +:(before "End Globals") +// Operator to look at elements of arrays. +const int INDEX = 20; +:(before "End Primitive Recipe Numbers") +Recipe_number["index"] = INDEX; +assert(Next_recipe_number == INDEX); +Next_recipe_number++; +:(before "End Primitive Recipe Implementations") +case INDEX: { + static const int ARRAY = Type_number["array"]; +//? if (Trace_stream) Trace_stream->dump_layer = "run"; //? 1 + trace("run") << "ingredient 0 is " << instructions[pc].ingredients[0].to_string(); + reagent base = canonize(instructions[pc].ingredients[0]); +//? trace("run") << "ingredient 0 after canonize: " << instructions[pc].ingredients[0].to_string(); //? 1 + int base_address = base.value; + assert(base.types[0] == ARRAY); + trace("run") << "ingredient 1 is " << instructions[pc].ingredients[1].to_string(); + reagent offset = canonize(instructions[pc].ingredients[1]); + vector offset_val(read_memory(offset)); + vector element_type = array_element(base.types); + int src = base_address + 1 + offset_val[0]*size_of(element_type); + trace("run") << "address to copy is " << src; + trace("run") << "its type is " << element_type[0]; + reagent tmp; + tmp.set_value(src); + copy(element_type.begin(), element_type.end(), inserter(tmp.types, tmp.types.begin())); + tmp.properties.push_back(pair >("raw", vector())); +//? cout << "AAA: " << tmp.to_string() << '\n'; //? 2 + vector result(read_memory(tmp)); + trace("run") << "product 0 is " << result[0]; + write_memory(instructions[pc].products[0], result); +//? if (Trace_stream) Trace_stream->dump_layer = ""; //? 1 + break; +} + +:(code) +vector array_element(const vector& types) { + return vector(++types.begin(), types.end()); +} + +:(scenario "index_address") +recipe main [ + 1:integer <- copy 3:literal + 2:integer <- copy 14:literal + 3:integer <- copy 15:literal + 4:integer <- copy 16:literal + 5:integer <- index-address 1:array:integer, 0:literal +] ++run: instruction main/4 ++run: address to copy is 2 ++mem: storing 2 in location 5 + +:(before "End Globals") +// To write to elements of containers, you need their address. +const int INDEX_ADDRESS = 21; +:(before "End Primitive Recipe Numbers") +Recipe_number["index-address"] = INDEX_ADDRESS; +assert(Next_recipe_number == INDEX_ADDRESS); +Next_recipe_number++; +:(before "End Primitive Recipe Implementations") +case INDEX_ADDRESS: { + static const int ARRAY = Type_number["array"]; + trace("run") << "ingredient 0 is " << instructions[pc].ingredients[0].name; + reagent base = canonize(instructions[pc].ingredients[0]); + int base_address = base.value; + assert(base.types[0] == ARRAY); + trace("run") << "ingredient 1 is " << instructions[pc].ingredients[1].to_string(); + reagent offset = canonize(instructions[pc].ingredients[1]); + vector offset_val(read_memory(offset)); + vector element_type = array_element(base.types); + int src = base_address + 1 + offset_val[0]*size_of(element_type); + trace("run") << "address to copy is " << src; + vector result; + result.push_back(src); + trace("run") << "product 0 is " << result[0]; + write_memory(instructions[pc].products[0], result); + break; +} + +:(scenario "index_indirect") +recipe main [ + 1:integer <- copy 3:literal + 2:integer <- copy 14:literal + 3:integer <- copy 15:literal + 4:integer <- copy 16:literal + 5:address:array:integer <- copy 1:literal + 6:integer <- index 5:address:array:integer/deref, 1:literal +] ++run: instruction main/5 ++mem: storing 15 in location 6 +// vim:ft=cpp -- cgit 1.4.1-2-gfad0