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/vm/entry_points.cpp

http://github.com/abeaumont/factor
C++ | 53 lines | 42 code | 7 blank | 4 comment | 1 complexity | 3d5851c92ac5c7650cf7d7afab5df0b1 MD5 | raw file
 1#include "master.hpp"
 2
 3namespace factor
 4{
 5
 6void factor_vm::c_to_factor(cell quot)
 7{
 8	/* First time this is called, wrap the c-to-factor sub-primitive inside
 9	of a callback stub, which saves and restores non-volatile registers
10	per platform ABI conventions, so that the Factor compiler can treat
11	all registers as volatile */
12	if(!c_to_factor_func)
13	{
14		tagged<word> c_to_factor_word(special_objects[C_TO_FACTOR_WORD]);
15		code_block *c_to_factor_block = callbacks->add(c_to_factor_word.value(),0);
16		void* func = c_to_factor_block->entry_point();
17		CODE_TO_FUNCTION_POINTER_CALLBACK(this, func);
18		c_to_factor_func = (c_to_factor_func_type)func;
19	}
20	c_to_factor_func(quot);
21}
22
23template<typename Func> Func factor_vm::get_entry_point(cell n)
24{
25	tagged<word> entry_point_word(special_objects[n]);
26	return (Func)entry_point_word->entry_point;
27}
28
29void factor_vm::unwind_native_frames(cell quot, void *to)
30{
31	tagged<word> entry_point_word(special_objects[UNWIND_NATIVE_FRAMES_WORD]);
32	void *func = entry_point_word->entry_point;
33	CODE_TO_FUNCTION_POINTER(func);
34	((unwind_native_frames_func_type)func)(quot,to);
35}
36
37cell factor_vm::get_fpu_state()
38{
39	tagged<word> entry_point_word(special_objects[GET_FPU_STATE_WORD]);
40	void *func = entry_point_word->entry_point;
41	CODE_TO_FUNCTION_POINTER(func);
42	return ((get_fpu_state_func_type)func)();
43}
44
45void factor_vm::set_fpu_state(cell state)
46{
47	tagged<word> entry_point_word(special_objects[SET_FPU_STATE_WORD]);
48	void *func = entry_point_word->entry_point;
49	CODE_TO_FUNCTION_POINTER(func);
50	((set_fpu_state_func_type)func)(state);
51}
52
53}