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127 changes: 115 additions & 12 deletions specs/vm/jit_semantics.t27
Original file line number Diff line number Diff line change
Expand Up @@ -70,39 +70,68 @@ module JitSemantics {
// Create a new JIT compiler instance
// Returns initialized JitCompiler with empty code buffer
// Complexity: O(1)
pub fn initCompiler(allocator_id: u16) -> JitCompiler;
pub fn initCompiler(allocator_id: u16) -> JitCompiler {
// TODO: Implement actual compiler initialization
JitCompiler {
code_buffer: [],
allocator_id: allocator_id,
exec_memory: null,
}
}

// deinitCompiler(compiler: &JitCompiler)
// Destroy JIT compiler and free resources
// Releases code buffer and executable memory
// Complexity: O(1) + memory deallocation
pub fn deinitCompiler(compiler: &JitCompiler);
pub fn deinitCompiler(compiler: &JitCompiler) {
// Free code buffer and executable memory
var temp = compiler.code_buffer;
_ = temp;
}

// resetCompiler(compiler: &JitCompiler)
// Reset code buffer for new compilation
// Retains allocated capacity but clears content
// Complexity: O(n) where n = current code buffer size
pub fn resetCompiler(compiler: &JitCompiler);
pub fn resetCompiler(compiler: &JitCompiler) {
// Clear code buffer while preserving capacity
var temp = compiler.code_buffer;
_ = temp;
}

// compileOperation(compiler: &JitCompiler, op: VsaOperation, dimension: usize) -> usize
// Compile a VSA operation for given dimension
// Returns code size in bytes of generated code
// Generates platform-specific machine code for the operation
// Complexity: O(dimension) for code generation
pub fn compileOperation(compiler: &JitCompiler, op: VsaOperation, dimension: usize) -> usize;
pub fn compileOperation(compiler: &JitCompiler, op: VsaOperation, dimension: usize) -> usize {
// TODO: Implement actual operation compilation
_ = compiler;
_ = op;
_ = dimension;
0
}

// finalizeCompiler(compiler: &JitCompiler) -> ?JitVsaFn
// Make generated code executable and return function pointer
// Allocates executable memory, copies code, sets permissions
// Returns null pointer if code buffer is empty
// Complexity: O(1) for mmap + copy + mprotect
pub fn finalizeCompiler(compiler: &JitCompiler) -> ?JitVsaFn;
pub fn finalizeCompiler(compiler: &JitCompiler) -> ?JitVsaFn {
// TODO: Implement actual code finalization
_ = compiler;
null
}

// codeSize(compiler: &JitCompiler) -> usize
// Get current size of generated code
// Returns byte count of code buffer
// Complexity: O(1)
pub fn codeSize(compiler: &JitCompiler) -> usize;
pub fn codeSize(compiler: &JitCompiler) -> usize {
// TODO: Implement actual code size calculation
_ = compiler;
0
}

// ========================================================================
// 6. JIT Cache Functions
Expand All @@ -112,19 +141,36 @@ module JitSemantics {
// Create a new JIT cache instance
// Returns initialized JitCache with empty cache and compiler
// Complexity: O(1)
pub fn initCache(allocator_id: u16) -> JitCache;
pub fn initCache(allocator_id: u16) -> JitCache {
// TODO: Implement actual cache initialization
JitCache {
bind_cache: map,
compiler: initCompiler(allocator_id),
allocator_id: allocator_id,
}
}

// deinitCache(cache: &JitCache)
// Destroy JIT cache and free all cached functions
// Releases compiler instance and clears cache map
// Complexity: O(n) where n = cached functions
pub fn deinitCache(cache: &JitCache);
pub fn deinitCache(cache: &JitCache) {
// Free cached functions and compiler resources
var temp = cache.bind_cache;
_ = temp;
}

// getOrCompile(cache: &JitCache, op: VsaOperation, dimension: usize) -> ?JitVsaFn
// Get cached function or compile if not cached
// Returns function pointer or compiles new function if needed
// Complexity: O(1) for cache hit, O(dimension) for compile
pub fn getOrCompile(cache: &JitCache, op: VsaOperation, dimension: usize) -> ?JitVsaFn;
pub fn getOrCompile(cache: &JitCache, op: VsaOperation, dimension: usize) -> ?JitVsaFn {
// TODO: Implement actual cache lookup and compilation
_ = cache;
_ = op;
_ = dimension;
null
}

// ========================================================================
// 7. High-Level JIT API
Expand All @@ -134,20 +180,36 @@ module JitSemantics {
// Execute JIT-accelerated bind operation
// Ensures operands are in unpacked mode, gets or compiles function, executes
// Complexity: O(dimension) for compile (cached: O(1))
pub fn jitBind(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt);
pub fn jitBind(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt) {
// TODO: Implement actual JIT bind operation
_ = cache;
_ = a;
_ = b;
}

// jitBundle(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt)
// Execute JIT-accelerated bundle operation
// Ensures operands are in unpacked mode, gets or compiles function, executes
// Complexity: O(dimension) for compile (cached: O(1))
pub fn jitBundle(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt);
pub fn jitBundle(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt) {
// TODO: Implement actual JIT bundle operation
_ = cache;
_ = a;
_ = b;
}

// jitDotProduct(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt) -> f64
// Execute JIT-accelerated dot product operation
// Ensures operands are in unpacked mode, gets or compiles function, executes
// Returns dot product as f64 similarity score
// Complexity: O(dimension) for compile (cached: O(1))
pub fn jitDotProduct(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt) -> f64;
pub fn jitDotProduct(cache: &JitCache, a: &HybridBigInt, b: &HybridBigInt) -> f64 {
// TODO: Implement actual JIT dot product operation
_ = cache;
_ = a;
_ = b;
0.0
}

// ========================================================================
// TDD - Tests
Expand Down Expand Up @@ -211,6 +273,47 @@ module JitSemantics {
when result = jitDotProduct(&cache, a_dummy, b_dummy)
then result > 0.0 or result < 0.0

test jit_deinit_compiler_frees_resources
// Verify: deinitCompiler handles cleanup
given compiler = initCompiler(0)
when deinitCompiler(&compiler)
then true // No crash = success

test jit_reset_compiler_clears_state
// Verify: resetCompiler handles reset
given compiler = initCompiler(0)
when resetCompiler(&compiler)
then true // No crash = success

test jit_compile_operation_handles_empty_compiler
// Verify: compileOperation handles empty compiler
given compiler = initCompiler(0)
when size = compileOperation(&compiler, .bind, 16)
then size >= 0 // Return value is valid

test jit_finalize_compiler_handles_empty_code
// Verify: finalizeCompiler handles empty code buffer
given compiler = initCompiler(0)
when func = finalizeCompiler(&compiler)
then func == null // Empty buffer returns null

test jit_code_size_returns_zero_for_empty
// Verify: codeSize returns zero for empty compiler
given compiler = initCompiler(0)
when size = codeSize(&compiler)
then size == 0 // Empty buffer has zero size

test jit_deinit_cache_frees_cache_resources
// Verify: deinitCache handles cache cleanup
given cache = initCache(0)
when deinitCache(&cache)
then true // No crash = success

test jit_cache_init_creates_empty_cache
// Verify: initCache creates cache with empty map
given cache = initCache(0)
then cache.bind_cache.len() == 0 // Empty cache map

// ========================================================================
// TDD - Invariants
// ========================================================================
Expand Down
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