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bytecode2 #2

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andre merged 20 commits from bytecode2 into master 2026-04-28 19:50:48 -05:00
Conversation 0 Commits 20 Files Changed 11 +8 -6
4 changed files with 8 additions and 6 deletions
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1
doc/BYTECODE
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@@ -18,6 +18,7 @@ The bytecode file is composed of the following sections:
[0:3]: function pointer (counter start at the beginning of executable code)
[4:5]: number of parameters
[6:7]: number of local variables
[8:b]: function size
* [0x2] Constants raw data
* [0x3] Code: executable code
* [0x4] Debugging info

5
src/bytecode/bytecode.cc
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@@ -24,8 +24,8 @@ Bytecode::Bytecode(ByteArray ba)
cache_.constants_start_addr = byte_array_.get_uint32(TOC_START + (2 * TOC_RECORD_SZ));
uint32_t code_start = byte_array_.get_uint32(TOC_START + (3 * TOC_RECORD_SZ));
for (uint32_t i = 0; i < cache_.n_functions; ++i) {
cache_.function_addr.emplace_back(code_start + byte_array_.get_uint32(cache_.functions_idx_addr + (i * 8)));
cache_.function_sz.emplace_back(0); // TODO
cache_.function_addr.emplace_back(code_start + byte_array_.get_uint32(cache_.functions_idx_addr + (i * FUNCTION_RECORD_SZ)));
cache_.function_sz.emplace_back(code_start + byte_array_.get_uint32(cache_.functions_idx_addr + (i * FUNCTION_RECORD_SZ) + 8));
}
}
@@ -117,6 +117,7 @@ ByteArray Bytecode::generate(BytecodePrototype const& bp)
functions_indexes.set_uint32(idx_idx, code_idx);
functions_indexes.set_uint16(idx_idx + 4, f.n_pars);
functions_indexes.set_uint16(idx_idx + 6, f.n_locals);
functions_indexes.set_uint32(idx_idx + 8, f.code.size());
raw_code.append_bytearray(f.code);
code_idx = raw_code.size();
idx_idx += FUNCTION_RECORD_SZ;

2
src/bytecode/bytecode.hh
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@@ -40,7 +40,7 @@ private:
TOC_SZ = TOC_N_RECORDS * TOC_RECORD_SZ;
static constexpr uint32_t CONST_IDX_START = TOC_START + TOC_SZ,
CONST_RECORD_SZ = 4;
static constexpr uint32_t FUNCTION_RECORD_SZ = 8;
static constexpr uint32_t FUNCTION_RECORD_SZ = 12;
enum Sections { SEC_CONST_IDX = 0, SEC_FUNC_IDX = 1, SEC_CONST_DATA = 2, SEC_CODE = 3 };

6
src/bytecode/tests.cc
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@@ -110,15 +110,15 @@ TEST(Bytecode, Code)
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // constant index
0x50, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, // variable index
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // raw constants
0x60, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, // raw code
0x68, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, // raw code
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// function definitions
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00,
// code
0x68, 0x54, 0x42,