6 void factor_vm::primitive_bignum_to_fixnum()
8 ctx->replace(tag_fixnum(bignum_to_fixnum(untag<bignum>(ctx->peek()))));
11 void factor_vm::primitive_float_to_fixnum()
13 ctx->replace(tag_fixnum(float_to_fixnum(ctx->peek())));
16 /* Division can only overflow when we are dividing the most negative fixnum
18 void factor_vm::primitive_fixnum_divint()
20 fixnum y = untag_fixnum(ctx->pop()); \
21 fixnum x = untag_fixnum(ctx->peek());
22 fixnum result = x / y;
23 if(result == -fixnum_min)
24 ctx->replace(allot_integer(-fixnum_min));
26 ctx->replace(tag_fixnum(result));
29 void factor_vm::primitive_fixnum_divmod()
31 cell y = ((cell *)ctx->datastack)[0];
32 cell x = ((cell *)ctx->datastack)[-1];
33 if(y == tag_fixnum(-1) && x == tag_fixnum(fixnum_min))
35 ((cell *)ctx->datastack)[-1] = allot_integer(-fixnum_min);
36 ((cell *)ctx->datastack)[0] = tag_fixnum(0);
40 ((cell *)ctx->datastack)[-1] = tag_fixnum(untag_fixnum(x) / untag_fixnum(y));
41 ((cell *)ctx->datastack)[0] = (fixnum)x % (fixnum)y;
46 * If we're shifting right by n bits, we won't overflow as long as none of the
47 * high WORD_SIZE-TAG_BITS-n bits are set.
49 inline fixnum factor_vm::sign_mask(fixnum x)
51 return x >> (WORD_SIZE - 1);
54 inline fixnum factor_vm::branchless_max(fixnum x, fixnum y)
56 return (x - ((x - y) & sign_mask(x - y)));
59 inline fixnum factor_vm::branchless_abs(fixnum x)
61 return (x ^ sign_mask(x)) - sign_mask(x);
64 void factor_vm::primitive_fixnum_shift()
66 fixnum y = untag_fixnum(ctx->pop());
67 fixnum x = untag_fixnum(ctx->peek());
73 y = branchless_max(y,-WORD_SIZE + 1);
74 ctx->replace(tag_fixnum(x >> -y));
77 else if(y < WORD_SIZE - TAG_BITS)
79 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
80 if(!(branchless_abs(x) & mask))
82 ctx->replace(tag_fixnum(x << y));
87 ctx->replace(tag<bignum>(bignum_arithmetic_shift(
88 fixnum_to_bignum(x),y)));
91 void factor_vm::primitive_fixnum_to_bignum()
93 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
96 void factor_vm::primitive_float_to_bignum()
98 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
101 #define POP_BIGNUMS(x,y) \
102 bignum * y = untag<bignum>(ctx->pop()); \
103 bignum * x = untag<bignum>(ctx->pop());
105 void factor_vm::primitive_bignum_eq()
108 ctx->push(tag_boolean(bignum_equal_p(x,y)));
111 void factor_vm::primitive_bignum_add()
114 ctx->push(tag<bignum>(bignum_add(x,y)));
117 void factor_vm::primitive_bignum_subtract()
120 ctx->push(tag<bignum>(bignum_subtract(x,y)));
123 void factor_vm::primitive_bignum_multiply()
126 ctx->push(tag<bignum>(bignum_multiply(x,y)));
129 void factor_vm::primitive_bignum_divint()
132 ctx->push(tag<bignum>(bignum_quotient(x,y)));
135 void factor_vm::primitive_bignum_divmod()
139 bignum_divide(x,y,&q,&r);
140 ctx->push(tag<bignum>(q));
141 ctx->push(tag<bignum>(r));
144 void factor_vm::primitive_bignum_mod()
147 ctx->push(tag<bignum>(bignum_remainder(x,y)));
150 void factor_vm::primitive_bignum_and()
153 ctx->push(tag<bignum>(bignum_bitwise_and(x,y)));
156 void factor_vm::primitive_bignum_or()
159 ctx->push(tag<bignum>(bignum_bitwise_ior(x,y)));
162 void factor_vm::primitive_bignum_xor()
165 ctx->push(tag<bignum>(bignum_bitwise_xor(x,y)));
168 void factor_vm::primitive_bignum_shift()
170 fixnum y = untag_fixnum(ctx->pop());
171 bignum* x = untag<bignum>(ctx->pop());
172 ctx->push(tag<bignum>(bignum_arithmetic_shift(x,y)));
175 void factor_vm::primitive_bignum_less()
178 ctx->push(tag_boolean(bignum_compare(x,y) == bignum_comparison_less));
181 void factor_vm::primitive_bignum_lesseq()
184 ctx->push(tag_boolean(bignum_compare(x,y) != bignum_comparison_greater));
187 void factor_vm::primitive_bignum_greater()
190 ctx->push(tag_boolean(bignum_compare(x,y) == bignum_comparison_greater));
193 void factor_vm::primitive_bignum_greatereq()
196 ctx->push(tag_boolean(bignum_compare(x,y) != bignum_comparison_less));
199 void factor_vm::primitive_bignum_not()
201 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
204 void factor_vm::primitive_bignum_bitp()
206 int bit = (int)to_fixnum(ctx->pop());
207 bignum *x = untag<bignum>(ctx->pop());
208 ctx->push(tag_boolean(bignum_logbitp(bit,x)));
211 void factor_vm::primitive_bignum_log2()
213 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
216 unsigned int factor_vm::bignum_producer(unsigned int digit)
218 unsigned char *ptr = (unsigned char *)alien_offset(ctx->peek());
219 return *(ptr + digit);
222 unsigned int bignum_producer(unsigned int digit, factor_vm *parent)
224 return parent->bignum_producer(digit);
227 void factor_vm::primitive_byte_array_to_bignum()
229 unsigned int n_digits = (unsigned int)array_capacity(untag_check<byte_array>(ctx->peek()));
230 bignum * result = digit_stream_to_bignum(n_digits,factor::bignum_producer,0x100,0);
231 ctx->replace(tag<bignum>(result));
234 cell factor_vm::unbox_array_size_slow()
236 if(tagged<object>(ctx->peek()).type() == BIGNUM_TYPE)
238 bignum *zero = untag<bignum>(bignum_zero);
239 bignum *max = cell_to_bignum(array_size_max);
240 bignum *n = untag<bignum>(ctx->peek());
241 if(bignum_compare(n,zero) != bignum_comparison_less
242 && bignum_compare(n,max) == bignum_comparison_less)
245 return bignum_to_cell(n);
249 general_error(ERROR_ARRAY_SIZE,ctx->pop(),tag_fixnum(array_size_max),NULL);
250 return 0; /* can't happen */
253 void factor_vm::primitive_fixnum_to_float()
255 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
258 void factor_vm::primitive_bignum_to_float()
260 ctx->replace(allot_float(bignum_to_float(ctx->peek())));
263 void factor_vm::primitive_str_to_float()
265 byte_array *bytes = untag_check<byte_array>(ctx->peek());
266 cell capacity = array_capacity(bytes);
268 char *c_str = (char *)(bytes + 1);
270 double f = strtod(c_str,&end);
271 if(end == c_str + capacity - 1)
272 ctx->replace(allot_float(f));
274 ctx->replace(false_object);
277 void factor_vm::primitive_float_to_str()
279 byte_array *array = allot_byte_array(33);
280 SNPRINTF((char *)(array + 1),32,"%.16g",untag_float_check(ctx->pop()));
281 ctx->push(tag<byte_array>(array));
284 #define POP_FLOATS(x,y) \
285 double y = untag_float(ctx->pop()); \
286 double x = untag_float(ctx->pop());
288 void factor_vm::primitive_float_eq()
291 ctx->push(tag_boolean(x == y));
294 void factor_vm::primitive_float_add()
297 ctx->push(allot_float(x + y));
300 void factor_vm::primitive_float_subtract()
303 ctx->push(allot_float(x - y));
306 void factor_vm::primitive_float_multiply()
309 ctx->push(allot_float(x * y));
312 void factor_vm::primitive_float_divfloat()
315 ctx->push(allot_float(x / y));
318 void factor_vm::primitive_float_mod()
321 ctx->push(allot_float(fmod(x,y)));
324 void factor_vm::primitive_float_less()
327 ctx->push(tag_boolean(x < y));
330 void factor_vm::primitive_float_lesseq()
333 ctx->push(tag_boolean(x <= y));
336 void factor_vm::primitive_float_greater()
339 ctx->push(tag_boolean(x > y));
342 void factor_vm::primitive_float_greatereq()
345 ctx->push(tag_boolean(x >= y));
348 void factor_vm::primitive_float_bits()
350 ctx->push(from_unsigned_4(float_bits((float)untag_float_check(ctx->pop()))));
353 void factor_vm::primitive_bits_float()
355 ctx->push(allot_float(bits_float((u32)to_cell(ctx->pop()))));
358 void factor_vm::primitive_double_bits()
360 ctx->push(from_unsigned_8(double_bits(untag_float_check(ctx->pop()))));
363 void factor_vm::primitive_bits_double()
365 ctx->push(allot_float(bits_double(to_unsigned_8(ctx->pop()))));
368 /* Cannot allocate */
369 fixnum factor_vm::to_fixnum(cell tagged)
374 return untag_fixnum(tagged);
376 return bignum_to_fixnum(untag<bignum>(tagged));
378 type_error(FIXNUM_TYPE,tagged);
379 return 0; /* can't happen */
383 VM_C_API fixnum to_fixnum(cell tagged, factor_vm *parent)
385 return parent->to_fixnum(tagged);
388 cell factor_vm::to_cell(cell tagged)
390 return (cell)to_fixnum(tagged);
393 VM_C_API cell to_cell(cell tagged, factor_vm *parent)
395 return parent->to_cell(tagged);
398 cell factor_vm::from_signed_1(s8 n)
400 return tag_fixnum(n);
403 VM_C_API cell from_signed_1(s8 n, factor_vm *parent)
405 return parent->from_signed_1(n);
408 cell factor_vm::from_unsigned_1(u8 n)
410 return tag_fixnum(n);
413 VM_C_API cell from_unsigned_1(u8 n, factor_vm *parent)
415 return parent->from_unsigned_1(n);
418 cell factor_vm::from_signed_2(s16 n)
420 return tag_fixnum(n);
423 VM_C_API cell from_signed_2(s16 n, factor_vm *parent)
425 return parent->from_signed_2(n);
428 cell factor_vm::from_unsigned_2(u16 n)
430 return tag_fixnum(n);
433 VM_C_API cell from_unsigned_2(u16 n, factor_vm *parent)
435 return parent->from_unsigned_2(n);
438 cell factor_vm::from_signed_4(s32 n)
440 return allot_integer(n);
443 VM_C_API cell from_signed_4(s32 n, factor_vm *parent)
445 return parent->from_signed_4(n);
448 cell factor_vm::from_unsigned_4(u32 n)
450 return allot_cell(n);
453 VM_C_API cell from_unsigned_4(u32 n, factor_vm *parent)
455 return parent->from_unsigned_4(n);
458 cell factor_vm::from_signed_cell(fixnum integer)
460 return allot_integer(integer);
463 cell factor_vm::from_unsigned_cell(cell integer)
465 return allot_cell(integer);
468 VM_C_API cell from_signed_cell(fixnum integer, factor_vm *parent)
470 return parent->from_signed_cell(integer);
473 VM_C_API cell from_unsigned_cell(cell integer, factor_vm *parent)
475 return parent->from_unsigned_cell(integer);
478 cell factor_vm::from_signed_8(s64 n)
480 if(n < fixnum_min || n > fixnum_max)
481 return tag<bignum>(long_long_to_bignum(n));
483 return tag_fixnum((fixnum)n);
486 VM_C_API cell from_signed_8(s64 n, factor_vm *parent)
488 return parent->from_signed_8(n);
491 /* Cannot allocate */
492 s64 factor_vm::to_signed_8(cell obj)
494 switch(tagged<object>(obj).type())
497 return untag_fixnum(obj);
499 return bignum_to_long_long(untag<bignum>(obj));
501 type_error(BIGNUM_TYPE,obj);
506 VM_C_API s64 to_signed_8(cell obj, factor_vm *parent)
508 return parent->to_signed_8(obj);
511 cell factor_vm::from_unsigned_8(u64 n)
513 if(n > (u64)fixnum_max)
514 return tag<bignum>(ulong_long_to_bignum(n));
516 return tag_fixnum((fixnum)n);
519 VM_C_API cell from_unsigned_8(u64 n, factor_vm *parent)
521 return parent->from_unsigned_8(n);
524 /* Cannot allocate */
525 u64 factor_vm::to_unsigned_8(cell obj)
527 switch(tagged<object>(obj).type())
530 return untag_fixnum(obj);
532 return bignum_to_ulong_long(untag<bignum>(obj));
534 type_error(BIGNUM_TYPE,obj);
539 VM_C_API u64 to_unsigned_8(cell obj, factor_vm *parent)
541 return parent->to_unsigned_8(obj);
544 VM_C_API cell from_float(float flo, factor_vm *parent)
546 return parent->allot_float(flo);
549 /* Cannot allocate */
550 float factor_vm::to_float(cell value)
552 return (float)untag_float_check(value);
555 VM_C_API float to_float(cell value, factor_vm *parent)
557 return parent->to_float(value);
560 VM_C_API cell from_double(double flo, factor_vm *parent)
562 return parent->allot_float(flo);
565 /* Cannot allocate */
566 double factor_vm::to_double(cell value)
568 return untag_float_check(value);
571 VM_C_API double to_double(cell value, factor_vm *parent)
573 return parent->to_double(value);
576 /* The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
577 overflow, they call these functions. */
578 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y)
580 ctx->replace(tag<bignum>(fixnum_to_bignum(
581 untag_fixnum(x) + untag_fixnum(y))));
584 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm *parent)
586 parent->overflow_fixnum_add(x,y);
589 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y)
591 ctx->replace(tag<bignum>(fixnum_to_bignum(
592 untag_fixnum(x) - untag_fixnum(y))));
595 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm *parent)
597 parent->overflow_fixnum_subtract(x,y);
600 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y)
602 bignum *bx = fixnum_to_bignum(x);
604 bignum *by = fixnum_to_bignum(y);
606 ctx->replace(tag<bignum>(bignum_multiply(bx,by)));
609 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm *parent)
611 parent->overflow_fixnum_multiply(x,y);