diff options
Diffstat (limited to 'archive/1.vm/024jump.cc')
| -rw-r--r-- | archive/1.vm/024jump.cc | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/archive/1.vm/024jump.cc b/archive/1.vm/024jump.cc new file mode 100644 index 00000000..66e238e6 --- /dev/null +++ b/archive/1.vm/024jump.cc @@ -0,0 +1,237 @@ +//: Jump primitives + +void test_jump_can_skip_instructions() { + run( + "def main [\n" + " jump 1:offset\n" + " 1:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump {1: \"offset\"}\n" + ); + CHECK_TRACE_DOESNT_CONTAIN("run: {1: \"number\"} <- copy {1: \"literal\"}"); + CHECK_TRACE_DOESNT_CONTAIN("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(Callstack_depth+1, "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); + +:(code) +void test_jump_backward() { + run( + "def main [\n" + " jump 1:offset\n" // 0 -+ + " jump 3:offset\n" // | +-+ 1 + // \/ /\ | + " jump -2:offset\n" // 2 +-->+ | + "]\n" // \/ 3 + ); + CHECK_TRACE_CONTENTS( + "run: jump {1: \"offset\"}\n" + "run: jump {-2: \"offset\"}\n" + "run: jump {3: \"offset\"}\n" + ); +} + +void test_jump_takes_no_products() { + Hide_errors = true; + run( + "def main [\n" + " 1:num <- jump 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "error: main: 'jump' instructions write no products\n" + ); +} + +:(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_address(inst.ingredients.at(0)) && !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 (!scalar_ingredient(ingredients, 0)) { + trace(Callstack_depth+1, "run") << "jump-if fell through" << end(); + break; + } + current_step_index() += ingredients.at(1).at(0)+1; + trace(Callstack_depth+1, "run") << "jumping to instruction " << current_step_index() << end(); + // skip rest of this instruction + write_products = false; + fall_through_to_next_instruction = false; + break; +} + +:(code) +void test_jump_if() { + run( + "def main [\n" + " jump-if 999, 1:offset\n" + " 123:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump-if {999: \"literal\"}, {1: \"offset\"}\n" + "run: jumping to instruction 2\n" + ); + CHECK_TRACE_DOESNT_CONTAIN("run: {123: \"number\"} <- copy {1: \"literal\"}"); + CHECK_TRACE_DOESNT_CONTAIN("mem: storing 1 in location 123"); +} + +void test_jump_if_fallthrough() { + run( + "def main [\n" + " jump-if 0, 1:offset\n" + " 123:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump-if {0: \"literal\"}, {1: \"offset\"}\n" + "run: jump-if fell through\n" + "run: {123: \"number\"} <- copy {1: \"literal\"}\n" + "mem: storing 1 in location 123\n" + ); +} + +void test_jump_if_on_address() { + run( + "def main [\n" + " 10:num/alloc-id, 11:num <- copy 0, 999\n" + " jump-if 10:&:number, 1:offset\n" + " 123:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump-if {10: (\"address\" \"number\")}, {1: \"offset\"}\n" + "run: jumping to instruction 3\n" + ); + CHECK_TRACE_DOESNT_CONTAIN("run: {123: \"number\"} <- copy {1: \"literal\"}"); + CHECK_TRACE_DOESNT_CONTAIN("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_address(inst.ingredients.at(0)) && !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 (scalar_ingredient(ingredients, 0)) { + trace(Callstack_depth+1, "run") << "jump-unless fell through" << end(); + break; + } + current_step_index() += ingredients.at(1).at(0)+1; + trace(Callstack_depth+1, "run") << "jumping to instruction " << current_step_index() << end(); + // skip rest of this instruction + write_products = false; + fall_through_to_next_instruction = false; + break; +} + +:(code) +void test_jump_unless() { + run( + "def main [\n" + " jump-unless 0, 1:offset\n" + " 123:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump-unless {0: \"literal\"}, {1: \"offset\"}\n" + "run: jumping to instruction 2\n" + ); + CHECK_TRACE_DOESNT_CONTAIN("run: {123: \"number\"} <- copy {1: \"literal\"}"); + CHECK_TRACE_DOESNT_CONTAIN("mem: storing 1 in location 123"); +} + +void test_jump_unless_fallthrough() { + run( + "def main [\n" + " jump-unless 999, 1:offset\n" + " 123:num <- copy 1\n" + "]\n" + ); + CHECK_TRACE_CONTENTS( + "run: jump-unless {999: \"literal\"}, {1: \"offset\"}\n" + "run: jump-unless fell through\n" + "run: {123: \"number\"} <- copy {1: \"literal\"}\n" + "mem: storing 1 in location 123\n" + ); +} |