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f6d9e5926b
Add an option (--enable-experimental-jit for configure-based builds or --experimental-jit for PCbuild-based ones) to build an *experimental* just-in-time compiler, based on copy-and-patch (https://fredrikbk.com/publications/copy-and-patch.pdf). See Tools/jit/README.md for more information on how to install the required build-time tooling.
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
#include "Python.h"
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#include "pycore_call.h"
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#include "pycore_ceval.h"
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#include "pycore_dict.h"
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#include "pycore_emscripten_signal.h"
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#include "pycore_intrinsics.h"
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#include "pycore_jit.h"
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#include "pycore_long.h"
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#include "pycore_opcode_metadata.h"
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#include "pycore_opcode_utils.h"
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#include "pycore_range.h"
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#include "pycore_setobject.h"
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#include "pycore_sliceobject.h"
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#include "ceval_macros.h"
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#undef CURRENT_OPARG
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#define CURRENT_OPARG() (_oparg)
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#undef CURRENT_OPERAND
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#define CURRENT_OPERAND() (_operand)
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#undef DEOPT_IF
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#define DEOPT_IF(COND, INSTNAME) \
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do { \
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if ((COND)) { \
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goto deoptimize; \
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} \
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} while (0)
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#undef ENABLE_SPECIALIZATION
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#define ENABLE_SPECIALIZATION (0)
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#undef GOTO_ERROR
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#define GOTO_ERROR(LABEL) \
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do { \
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goto LABEL ## _tier_two; \
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} while (0)
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#undef LOAD_IP
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#define LOAD_IP(UNUSED) \
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do { \
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} while (0)
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#define PATCH_VALUE(TYPE, NAME, ALIAS) \
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extern void ALIAS; \
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TYPE NAME = (TYPE)(uint64_t)&ALIAS;
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#define PATCH_JUMP(ALIAS) \
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extern void ALIAS; \
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__attribute__((musttail)) \
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return ((jit_func)&ALIAS)(frame, stack_pointer, tstate);
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_Py_CODEUNIT *
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_JIT_ENTRY(_PyInterpreterFrame *frame, PyObject **stack_pointer, PyThreadState *tstate)
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{
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// Locals that the instruction implementations expect to exist:
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PATCH_VALUE(_PyExecutorObject *, current_executor, _JIT_EXECUTOR)
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int oparg;
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int opcode = _JIT_OPCODE;
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_PyUOpInstruction *next_uop;
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// Other stuff we need handy:
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PATCH_VALUE(uint16_t, _oparg, _JIT_OPARG)
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PATCH_VALUE(uint64_t, _operand, _JIT_OPERAND)
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PATCH_VALUE(uint32_t, _target, _JIT_TARGET)
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// The actual instruction definitions (only one will be used):
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if (opcode == _JUMP_TO_TOP) {
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CHECK_EVAL_BREAKER();
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PATCH_JUMP(_JIT_TOP);
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}
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switch (opcode) {
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#include "executor_cases.c.h"
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default:
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Py_UNREACHABLE();
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}
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PATCH_JUMP(_JIT_CONTINUE);
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// Labels that the instruction implementations expect to exist:
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unbound_local_error_tier_two:
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_PyEval_FormatExcCheckArg(
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tstate, PyExc_UnboundLocalError, UNBOUNDLOCAL_ERROR_MSG,
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PyTuple_GetItem(_PyFrame_GetCode(frame)->co_localsplusnames, oparg));
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goto error_tier_two;
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pop_4_error_tier_two:
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STACK_SHRINK(1);
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pop_3_error_tier_two:
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STACK_SHRINK(1);
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pop_2_error_tier_two:
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STACK_SHRINK(1);
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pop_1_error_tier_two:
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STACK_SHRINK(1);
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error_tier_two:
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_PyFrame_SetStackPointer(frame, stack_pointer);
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return NULL;
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deoptimize:
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_PyFrame_SetStackPointer(frame, stack_pointer);
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return _PyCode_CODE(_PyFrame_GetCode(frame)) + _target;
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}
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