92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
namespace factor
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{
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static const fixnum fixnum_max = (((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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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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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{
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cell obj = ctx->peek();
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if(TAG(obj) == FIXNUM_TYPE)
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{
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fixnum n = untag_fixnum(obj);
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if(n >= 0 && n < (fixnum)array_size_max)
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{
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ctx->pop();
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return n;
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}
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}
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return unbox_array_size_slow();
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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(s64 n, factor_vm *vm);
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VM_C_API cell from_unsigned_8(u64 n, factor_vm *vm);
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VM_C_API s64 to_signed_8(cell obj, factor_vm *parent);
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VM_C_API u64 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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