3 static const fixnum fixnum_max =
4 (((fixnum) 1 << (WORD_SIZE - TAG_BITS - 1)) - 1);
5 static const fixnum fixnum_min = (-((fixnum) 1 << (WORD_SIZE - TAG_BITS - 1)));
6 static const fixnum array_size_max = ((cell) 1 << (WORD_SIZE - TAG_BITS - 2));
9 inline cell factor_vm::from_signed_cell(fixnum x) {
10 if (x < fixnum_min || x > fixnum_max)
11 return tag<bignum>(fixnum_to_bignum(x));
16 /* Allocates memory */
17 inline cell factor_vm::from_unsigned_cell(cell x) {
18 if (x > (cell) fixnum_max)
19 return tag<bignum>(cell_to_bignum(x));
24 /* Allocates memory */
25 inline cell factor_vm::allot_float(double n) {
26 boxed_float* flo = allot<boxed_float>(sizeof(boxed_float));
31 /* Allocates memory */
32 inline bignum* factor_vm::float_to_bignum(cell tagged) {
33 return double_to_bignum(untag_float(tagged));
36 inline double factor_vm::untag_float(cell tagged) {
37 return untag<boxed_float>(tagged)->n;
40 inline double factor_vm::untag_float_check(cell tagged) {
41 return untag_check<boxed_float>(tagged)->n;
44 inline fixnum factor_vm::float_to_fixnum(cell tagged) {
45 return (fixnum) untag_float(tagged);
48 inline double factor_vm::fixnum_to_float(cell tagged) {
49 return (double) untag_fixnum(tagged);
52 inline cell factor_vm::unbox_array_size() {
53 cell obj = ctx->peek();
54 if (TAG(obj) == FIXNUM_TYPE) {
55 fixnum n = untag_fixnum(obj);
56 if (n >= 0 && n < (fixnum) array_size_max) {
62 return unbox_array_size_slow();
65 VM_C_API cell from_signed_cell(fixnum integer, factor_vm* vm);
66 VM_C_API cell from_unsigned_cell(cell integer, factor_vm* vm);
67 VM_C_API cell from_signed_8(s64 n, factor_vm* vm);
68 VM_C_API cell from_unsigned_8(u64 n, factor_vm* vm);
70 VM_C_API s64 to_signed_8(cell obj, factor_vm* parent);
71 VM_C_API u64 to_unsigned_8(cell obj, factor_vm* parent);
73 VM_C_API fixnum to_fixnum(cell tagged, factor_vm* vm);
74 VM_C_API cell to_cell(cell tagged, factor_vm* vm);
76 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent);
77 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent);
78 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent);