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| author |  Tom Willemse | 2022-01-12 22:58:10 -0800 |
|---|---|---|
| committer | Tom Willemse | 2022-01-12 22:58:10 -0800 |
| commit | ba6ab6759e4257e543ca5da4caf2705711e5b3ed (patch) | |
| tree | c8a2c895d4c07e0979981c816f03d960b789449a /clox/src/vm.c | |
| parent | 65275bde8a82f54710a65d6e6563394bb850b7ef (diff) | |
| download | crafting-interpreters-ba6ab6759e4257e543ca5da4caf2705711e5b3ed.tar.gz crafting-interpreters-ba6ab6759e4257e543ca5da4caf2705711e5b3ed.zip | |
Chapter 23.2
Diffstat (limited to 'clox/src/vm.c')
| -rw-r--r-- | clox/src/vm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/clox/src/vm.c b/clox/src/vm.c index d869527..49a162d 100644 --- a/clox/src/vm.c +++ b/clox/src/vm.c @@ -73,6 +73,7 @@ static void concatenate() { static InterpretResult run() { #define READ_BYTE() (*vm.ip++) #define READ_CONSTANT() (vm.chunk->constants.values[READ_BYTE()]) +#define READ_SHORT() (vm.ip += 2, (uint16_t)((vm.ip[-2] << 8) | vm.ip[-1])) #define READ_STRING() AS_STRING(READ_CONSTANT()) #define BINARY_OP(valueType, op) \ do { \ @@ -199,6 +200,17 @@ static InterpretResult run() { printf("\n"); break; } + case OP_JUMP: { + uint16_t offset = READ_SHORT(); + vm.ip += offset; + break; + } + case OP_JUMP_IF_FALSE: { + uint16_t offset = READ_SHORT(); + if (isFalsey(peek(0))) + vm.ip += offset; + break; + } case OP_RETURN: { /* The book said to remove this, but when I do I get an infinite loop and then a segfault because it keeps trying to add the constant 1 to the @@ -211,6 +223,7 @@ static InterpretResult run() { } #undef READ_BYTE +#undef READ_SHORT #undef READ_CONSTANT #undef READ_STRING #undef BINARY_OP |