diff options
Diffstat (limited to '025jump.cc')
-rw-r--r-- | 025jump.cc | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/025jump.cc b/025jump.cc new file mode 100644 index 00000000..37011290 --- /dev/null +++ b/025jump.cc @@ -0,0 +1,183 @@ +//: Jump primitives + +:(scenario jump_can_skip_instructions) +def main [ + jump 1:offset + 1:num <- copy 1 +] ++run: jump {1: "offset"} +-run: {1: "number"} <- copy {1: "literal"} +-mem: storing 1 in location 1 + +:(before "End Primitive Recipe Declarations") +JUMP, +:(before "End Primitive Recipe Numbers") +put(Recipe_ordinal, "jump", JUMP); +:(before "End Primitive Recipe Checks") +case JUMP: { + if (SIZE(inst.ingredients) != 1) { + raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly one ingredient\n" << end(); + break; + } + if (!is_literal(inst.ingredients.at(0))) { + 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(); + break; + } + if (!inst.products.empty()) { + raise << maybe(get(Recipe, r).name) << "'jump' instructions write no products\n" << end(); + break; + } + break; +} +:(before "End Primitive Recipe Implementations") +case JUMP: { + assert(current_instruction().ingredients.at(0).initialized); + current_step_index() += ingredients.at(0).at(0)+1; + trace(9998, "run") << "jumping to instruction " << current_step_index() << end(); + // skip rest of this instruction + write_products = false; + fall_through_to_next_instruction = false; + break; +} + +//: special type to designate jump targets +:(before "End Mu Types Initialization") +put(Type_ordinal, "offset", 0); + +:(scenario jump_backward) +def main [ + jump 1:offset # 0 -+ + jump 3:offset # | +-+ 1 + # \/ /\ | + jump -2:offset # 2 +-->+ | +] # \/ 3 ++run: jump {1: "offset"} ++run: jump {-2: "offset"} ++run: jump {3: "offset"} + +:(scenario jump_takes_no_products) +% Hide_errors = true; +def main [ + 1:num <- jump 1 +] ++error: main: 'jump' instructions write no products + +:(before "End Primitive Recipe Declarations") +JUMP_IF, +:(before "End Primitive Recipe Numbers") +put(Recipe_ordinal, "jump-if", JUMP_IF); +:(before "End Primitive Recipe Checks") +case JUMP_IF: { + if (SIZE(inst.ingredients) != 2) { + raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly two ingredients\n" << end(); + break; + } + if (!is_mu_scalar(inst.ingredients.at(0))) { + 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(); + break; + } + if (!is_literal(inst.ingredients.at(1))) { + 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(); + break; + } + if (!inst.products.empty()) { + raise << maybe(get(Recipe, r).name) << "'jump-if' instructions write no products\n" << end(); + break; + } + // End JUMP_IF Checks + break; +} +:(before "End Primitive Recipe Implementations") +case JUMP_IF: { + assert(current_instruction().ingredients.at(1).initialized); + if (!ingredients.at(0).at(0)) { + trace(9998, "run") << "jump-if fell through" << end(); + break; + } + current_step_index() += ingredients.at(1).at(0)+1; + trace(9998, "run") << "jumping to instruction " << current_step_index() << end(); + // skip rest of this instruction + write_products = false; + fall_through_to_next_instruction = false; + break; +} + +:(scenario jump_if) +def main [ + jump-if 999, 1:offset + 123:num <- copy 1 +] ++run: jump-if {999: "literal"}, {1: "offset"} ++run: jumping to instruction 2 +-run: {1: "number"} <- copy {1: "literal"} +-mem: storing 1 in location 123 + +:(scenario jump_if_fallthrough) +def main [ + jump-if 0, 1:offset + 123:num <- copy 1 +] ++run: jump-if {0: "literal"}, {1: "offset"} ++run: jump-if fell through ++run: {123: "number"} <- copy {1: "literal"} ++mem: storing 1 in location 123 + +:(before "End Primitive Recipe Declarations") +JUMP_UNLESS, +:(before "End Primitive Recipe Numbers") +put(Recipe_ordinal, "jump-unless", JUMP_UNLESS); +:(before "End Primitive Recipe Checks") +case JUMP_UNLESS: { + if (SIZE(inst.ingredients) != 2) { + raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' should get exactly two ingredients\n" << end(); + break; + } + if (!is_mu_scalar(inst.ingredients.at(0))) { + 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(); + break; + } + if (!is_literal(inst.ingredients.at(1))) { + 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(); + break; + } + if (!inst.products.empty()) { + raise << maybe(get(Recipe, r).name) << "'jump' instructions write no products\n" << end(); + break; + } + // End JUMP_UNLESS Checks + break; +} +:(before "End Primitive Recipe Implementations") +case JUMP_UNLESS: { + assert(current_instruction().ingredients.at(1).initialized); + if (ingredients.at(0).at(0)) { + trace(9998, "run") << "jump-unless fell through" << end(); + break; + } + current_step_index() += ingredients.at(1).at(0)+1; + trace(9998, "run") << "jumping to instruction " << current_step_index() << end(); + // skip rest of this instruction + write_products = false; + fall_through_to_next_instruction = false; + break; +} + +:(scenario jump_unless) +def main [ + jump-unless 0, 1:offset + 123:num <- copy 1 +] ++run: jump-unless {0: "literal"}, {1: "offset"} ++run: jumping to instruction 2 +-run: {123: "number"} <- copy {1: "literal"} +-mem: storing 1 in location 123 + +:(scenario jump_unless_fallthrough) +def main [ + jump-unless 999, 1:offset + 123:num <- copy 1 +] ++run: jump-unless {999: "literal"}, {1: "offset"} ++run: jump-unless fell through ++run: {123: "number"} <- copy {1: "literal"} ++mem: storing 1 in location 123 |