195 lines
6.6 KiB
C++
195 lines
6.6 KiB
C++
//: Jump primitives
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:(scenario jump_can_skip_instructions)
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def main [
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jump 1:offset
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1:num <- copy 1
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]
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+run: jump {1: "offset"}
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-run: {1: "number"} <- copy {1: "literal"}
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-mem: storing 1 in location 1
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:(before "End Primitive Recipe Declarations")
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JUMP,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "jump", JUMP);
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:(before "End Primitive Recipe Checks")
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case JUMP: {
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if (SIZE(inst.ingredients) != 1) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly one ingredient\n" << end();
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break;
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}
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if (!is_literal(inst.ingredients.at(0))) {
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raise << maybe(get(Recipe, r).name) << "first ingredient of '" << to_original_string(inst) << "' should be a label or offset, but '" << inst.ingredients.at(0).name << "' has type '" << names_to_string_without_quotes(inst.ingredients.at(0).type) << "'\n" << end();
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break;
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}
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if (!inst.products.empty()) {
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raise << maybe(get(Recipe, r).name) << "'jump' instructions write no products\n" << end();
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break;
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}
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case JUMP: {
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assert(current_instruction().ingredients.at(0).initialized);
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current_step_index() += ingredients.at(0).at(0)+1;
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trace(9998, "run") << "jumping to instruction " << current_step_index() << end();
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// skip rest of this instruction
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write_products = false;
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fall_through_to_next_instruction = false;
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break;
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}
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//: special type to designate jump targets
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:(before "End Mu Types Initialization")
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put(Type_ordinal, "offset", 0);
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:(scenario jump_backward)
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def main [
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jump 1:offset # 0 -+
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jump 3:offset # | +-+ 1
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# \/ /\ |
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jump -2:offset # 2 +-->+ |
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] # \/ 3
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+run: jump {1: "offset"}
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+run: jump {-2: "offset"}
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+run: jump {3: "offset"}
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:(scenario jump_takes_no_products)
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% Hide_errors = true;
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def main [
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1:num <- jump 1
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]
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+error: main: 'jump' instructions write no products
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:(before "End Primitive Recipe Declarations")
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JUMP_IF,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "jump-if", JUMP_IF);
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:(before "End Primitive Recipe Checks")
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case JUMP_IF: {
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if (SIZE(inst.ingredients) != 2) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly two ingredients\n" << end();
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break;
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}
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if (!is_mu_address(inst.ingredients.at(0)) && !is_mu_scalar(inst.ingredients.at(0))) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' requires a boolean for its first ingredient, but '" << inst.ingredients.at(0).name << "' has type '" << names_to_string_without_quotes(inst.ingredients.at(0).type) << "'\n" << end();
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break;
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}
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if (!is_literal(inst.ingredients.at(1))) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' requires a label or offset for its second ingredient, but '" << inst.ingredients.at(1).name << "' has type '" << names_to_string_without_quotes(inst.ingredients.at(1).type) << "'\n" << end();
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break;
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}
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if (!inst.products.empty()) {
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raise << maybe(get(Recipe, r).name) << "'jump-if' instructions write no products\n" << end();
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break;
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}
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// End JUMP_IF Checks
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case JUMP_IF: {
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assert(current_instruction().ingredients.at(1).initialized);
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if (!scalar_ingredient(ingredients, 0)) {
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trace(9998, "run") << "jump-if fell through" << end();
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break;
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}
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current_step_index() += ingredients.at(1).at(0)+1;
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trace(9998, "run") << "jumping to instruction " << current_step_index() << end();
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// skip rest of this instruction
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write_products = false;
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fall_through_to_next_instruction = false;
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break;
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}
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:(scenario jump_if)
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def main [
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jump-if 999, 1:offset
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123:num <- copy 1
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]
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+run: jump-if {999: "literal"}, {1: "offset"}
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+run: jumping to instruction 2
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-run: {123: "number"} <- copy {1: "literal"}
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-mem: storing 1 in location 123
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:(scenario jump_if_fallthrough)
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def main [
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jump-if 0, 1:offset
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123:num <- copy 1
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]
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+run: jump-if {0: "literal"}, {1: "offset"}
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+run: jump-if fell through
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+run: {123: "number"} <- copy {1: "literal"}
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+mem: storing 1 in location 123
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:(scenario jump_if_on_address)
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def main [
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10:num/alloc-id, 11:num <- copy 0, 999
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jump-if 10:&:number, 1:offset
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123:num <- copy 1
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]
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+run: jump-if {10: ("address" "number")}, {1: "offset"}
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+run: jumping to instruction 3
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-run: {123: "number"} <- copy {1: "literal"}
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-mem: storing 1 in location 123
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:(before "End Primitive Recipe Declarations")
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JUMP_UNLESS,
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:(before "End Primitive Recipe Numbers")
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put(Recipe_ordinal, "jump-unless", JUMP_UNLESS);
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:(before "End Primitive Recipe Checks")
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case JUMP_UNLESS: {
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if (SIZE(inst.ingredients) != 2) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly two ingredients\n" << end();
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break;
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}
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if (!is_mu_address(inst.ingredients.at(0)) && !is_mu_scalar(inst.ingredients.at(0))) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' requires a boolean for its first ingredient, but '" << inst.ingredients.at(0).name << "' has type '" << names_to_string_without_quotes(inst.ingredients.at(0).type) << "'\n" << end();
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break;
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}
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if (!is_literal(inst.ingredients.at(1))) {
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raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' requires a label or offset for its second ingredient, but '" << inst.ingredients.at(1).name << "' has type '" << names_to_string_without_quotes(inst.ingredients.at(1).type) << "'\n" << end();
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break;
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}
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if (!inst.products.empty()) {
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raise << maybe(get(Recipe, r).name) << "'jump' instructions write no products\n" << end();
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break;
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}
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// End JUMP_UNLESS Checks
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break;
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}
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:(before "End Primitive Recipe Implementations")
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case JUMP_UNLESS: {
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assert(current_instruction().ingredients.at(1).initialized);
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if (scalar_ingredient(ingredients, 0)) {
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trace(9998, "run") << "jump-unless fell through" << end();
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break;
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}
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current_step_index() += ingredients.at(1).at(0)+1;
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trace(9998, "run") << "jumping to instruction " << current_step_index() << end();
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// skip rest of this instruction
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write_products = false;
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fall_through_to_next_instruction = false;
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break;
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}
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:(scenario jump_unless)
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def main [
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jump-unless 0, 1:offset
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123:num <- copy 1
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]
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+run: jump-unless {0: "literal"}, {1: "offset"}
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+run: jumping to instruction 2
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-run: {123: "number"} <- copy {1: "literal"}
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-mem: storing 1 in location 123
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:(scenario jump_unless_fallthrough)
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def main [
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jump-unless 999, 1:offset
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123:num <- copy 1
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]
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+run: jump-unless {999: "literal"}, {1: "offset"}
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+run: jump-unless fell through
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+run: {123: "number"} <- copy {1: "literal"}
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+mem: storing 1 in location 123
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