78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
namespace factor {
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static const fixnum fixnum_max =
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(((fixnum)1 << (WORD_SIZE - TAG_BITS - 1)) - 1);
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static const fixnum fixnum_min = (-((fixnum)1 << (WORD_SIZE - TAG_BITS - 1)));
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static const fixnum array_size_max = ((cell)1 << (WORD_SIZE - TAG_BITS - 2));
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/* Allocates memory */
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inline cell factor_vm::from_signed_cell(fixnum x) {
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if (x < fixnum_min || x > fixnum_max)
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return tag<bignum>(fixnum_to_bignum(x));
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else
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return tag_fixnum(x);
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}
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/* Allocates memory */
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inline cell factor_vm::from_unsigned_cell(cell x) {
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if (x > (cell)fixnum_max)
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return tag<bignum>(cell_to_bignum(x));
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else
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return tag_fixnum(x);
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}
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/* Allocates memory */
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inline cell factor_vm::allot_float(double n) {
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boxed_float* flo = allot<boxed_float>(sizeof(boxed_float));
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flo->n = n;
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return tag(flo);
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}
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/* Allocates memory */
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inline bignum* factor_vm::float_to_bignum(cell tagged) {
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return double_to_bignum(untag_float(tagged));
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}
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inline double factor_vm::untag_float(cell tagged) {
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return untag<boxed_float>(tagged)->n;
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}
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inline double factor_vm::untag_float_check(cell tagged) {
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return untag_check<boxed_float>(tagged)->n;
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}
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inline fixnum factor_vm::float_to_fixnum(cell tagged) {
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return (fixnum)untag_float(tagged);
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}
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inline double factor_vm::fixnum_to_float(cell tagged) {
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return (double)untag_fixnum(tagged);
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}
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inline cell factor_vm::unbox_array_size() {
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cell obj = ctx->pop();
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fixnum n = to_fixnum_strict(obj);
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if (n >= 0 && n < (fixnum)array_size_max) {
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return n;
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}
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general_error(ERROR_ARRAY_SIZE, obj, tag_fixnum(array_size_max));
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return 0; /* can't happen */
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}
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VM_C_API cell from_signed_cell(fixnum integer, factor_vm* vm);
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VM_C_API cell from_unsigned_cell(cell integer, factor_vm* vm);
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VM_C_API cell from_signed_8(int64_t n, factor_vm* vm);
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VM_C_API cell from_unsigned_8(uint64_t n, factor_vm* vm);
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VM_C_API int64_t to_signed_8(cell obj, factor_vm* parent);
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VM_C_API uint64_t to_unsigned_8(cell obj, factor_vm* parent);
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VM_C_API fixnum to_fixnum(cell tagged, factor_vm* vm);
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VM_C_API cell to_cell(cell tagged, factor_vm* vm);
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VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent);
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VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent);
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VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent);
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}
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