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 /* does not allocate, even though from_signed_cell can allocate */
17 /* Division can only overflow when we are dividing the most negative fixnum
19 void factor_vm::primitive_fixnum_divint()
21 fixnum y = untag_fixnum(ctx->pop());
22 fixnum x = untag_fixnum(ctx->peek());
23 fixnum result = x / y;
24 if(result == -fixnum_min)
25 /* Does not allocate */
26 ctx->replace(from_signed_cell(-fixnum_min));
28 ctx->replace(tag_fixnum(result));
31 /* does not allocate, even though from_signed_cell can allocate */
32 void factor_vm::primitive_fixnum_divmod()
34 cell *s0 = (cell *)(ctx->datastack);
35 cell *s1 = (cell *)(ctx->datastack - sizeof(cell));
36 fixnum y = untag_fixnum(*s0);
37 fixnum x = untag_fixnum(*s1);
38 if(y == -1 && x == fixnum_min)
40 /* Does not allocate */
41 *s1 = from_signed_cell(-fixnum_min);
46 *s1 = tag_fixnum(x / y);
47 *s0 = tag_fixnum(x % y);
52 * If we're shifting right by n bits, we won't overflow as long as none of the
53 * high WORD_SIZE-TAG_BITS-n bits are set.
55 inline fixnum factor_vm::sign_mask(fixnum x)
57 return x >> (WORD_SIZE - 1);
60 inline fixnum factor_vm::branchless_max(fixnum x, fixnum y)
62 return (x - ((x - y) & sign_mask(x - y)));
65 inline fixnum factor_vm::branchless_abs(fixnum x)
67 return (x ^ sign_mask(x)) - sign_mask(x);
70 void factor_vm::primitive_fixnum_shift()
72 fixnum y = untag_fixnum(ctx->pop());
73 fixnum x = untag_fixnum(ctx->peek());
79 y = branchless_max(y,-WORD_SIZE + 1);
80 ctx->replace(tag_fixnum(x >> -y));
83 else if(y < WORD_SIZE - TAG_BITS)
85 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
86 if(!(branchless_abs(x) & mask))
88 ctx->replace(tag_fixnum(x << y));
93 ctx->replace(tag<bignum>(bignum_arithmetic_shift(
94 fixnum_to_bignum(x),y)));
97 void factor_vm::primitive_fixnum_to_bignum()
99 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
102 void factor_vm::primitive_float_to_bignum()
104 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
107 #define POP_BIGNUMS(x,y) \
108 bignum * y = untag<bignum>(ctx->pop()); \
109 bignum * x = untag<bignum>(ctx->peek());
111 void factor_vm::primitive_bignum_eq()
114 ctx->replace(tag_boolean(bignum_equal_p(x,y)));
117 void factor_vm::primitive_bignum_add()
120 ctx->replace(tag<bignum>(bignum_add(x,y)));
123 void factor_vm::primitive_bignum_subtract()
126 ctx->replace(tag<bignum>(bignum_subtract(x,y)));
129 void factor_vm::primitive_bignum_multiply()
132 ctx->replace(tag<bignum>(bignum_multiply(x,y)));
135 void factor_vm::primitive_bignum_divint()
138 ctx->replace(tag<bignum>(bignum_quotient(x,y)));
141 void factor_vm::primitive_bignum_divmod()
143 cell *s0 = (cell *)(ctx->datastack);
144 cell *s1 = (cell *)(ctx->datastack - sizeof(cell));
145 bignum *y = untag<bignum>(*s0);
146 bignum *x = untag<bignum>(*s1);
148 bignum_divide(x, y, &q, &r);
149 *s1 = tag<bignum>(q);
150 *s0 = tag<bignum>(r);
153 void factor_vm::primitive_bignum_mod()
156 ctx->replace(tag<bignum>(bignum_remainder(x,y)));
159 void factor_vm::primitive_bignum_gcd()
162 ctx->replace(tag<bignum>(bignum_gcd(x,y)));
165 void factor_vm::primitive_bignum_and()
168 ctx->replace(tag<bignum>(bignum_bitwise_and(x,y)));
171 void factor_vm::primitive_bignum_or()
174 ctx->replace(tag<bignum>(bignum_bitwise_ior(x,y)));
177 void factor_vm::primitive_bignum_xor()
180 ctx->replace(tag<bignum>(bignum_bitwise_xor(x,y)));
183 void factor_vm::primitive_bignum_shift()
185 fixnum y = untag_fixnum(ctx->pop());
186 bignum* x = untag<bignum>(ctx->peek());
187 ctx->replace(tag<bignum>(bignum_arithmetic_shift(x,y)));
190 void factor_vm::primitive_bignum_less()
193 ctx->replace(tag_boolean(bignum_compare(x,y) == bignum_comparison_less));
196 void factor_vm::primitive_bignum_lesseq()
199 ctx->replace(tag_boolean(bignum_compare(x,y) != bignum_comparison_greater));
202 void factor_vm::primitive_bignum_greater()
205 ctx->replace(tag_boolean(bignum_compare(x,y) == bignum_comparison_greater));
208 void factor_vm::primitive_bignum_greatereq()
211 ctx->replace(tag_boolean(bignum_compare(x,y) != bignum_comparison_less));
214 void factor_vm::primitive_bignum_not()
216 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
219 void factor_vm::primitive_bignum_bitp()
221 int bit = (int)to_fixnum(ctx->pop());
222 bignum *x = untag<bignum>(ctx->peek());
223 ctx->replace(tag_boolean(bignum_logbitp(bit,x)));
226 void factor_vm::primitive_bignum_log2()
228 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
231 /* Allocates memory */
232 cell factor_vm::unbox_array_size_slow()
234 if(tagged<object>(ctx->peek()).type() == BIGNUM_TYPE)
236 bignum *zero = untag<bignum>(bignum_zero);
238 bignum *max = cell_to_bignum(array_size_max);
239 bignum *n = untag<bignum>(ctx->peek());
240 if(bignum_compare(n,zero) != bignum_comparison_less
241 && bignum_compare(n,max) == bignum_comparison_less)
244 return bignum_to_cell(n);
248 general_error(ERROR_ARRAY_SIZE,ctx->pop(),tag_fixnum(array_size_max));
249 return 0; /* can't happen */
252 /* Allocates memory */
253 void factor_vm::primitive_fixnum_to_float()
255 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
258 /* Allocates memory */
259 void factor_vm::primitive_format_float()
261 byte_array *array = allot_byte_array(100);
262 char *format = alien_offset(ctx->pop());
263 double value = untag_float_check(ctx->peek());
264 SNPRINTF(array->data<char>(),99,format,value);
265 ctx->replace(tag<byte_array>(array));
268 #define POP_FLOATS(x,y) \
269 double y = untag_float(ctx->pop()); \
270 double x = untag_float(ctx->peek());
272 void factor_vm::primitive_float_eq()
275 ctx->replace(tag_boolean(x == y));
278 /* Allocates memory */
279 void factor_vm::primitive_float_add()
282 ctx->replace(allot_float(x + y));
285 /* Allocates memory */
286 void factor_vm::primitive_float_subtract()
289 ctx->replace(allot_float(x - y));
292 /* Allocates memory */
293 void factor_vm::primitive_float_multiply()
296 ctx->replace(allot_float(x * y));
299 /* Allocates memory */
300 void factor_vm::primitive_float_divfloat()
303 ctx->replace(allot_float(x / y));
306 void factor_vm::primitive_float_less()
309 ctx->replace(tag_boolean(x < y));
312 void factor_vm::primitive_float_lesseq()
315 ctx->replace(tag_boolean(x <= y));
318 void factor_vm::primitive_float_greater()
321 ctx->replace(tag_boolean(x > y));
324 void factor_vm::primitive_float_greatereq()
327 ctx->replace(tag_boolean(x >= y));
330 /* Allocates memory */
331 void factor_vm::primitive_float_bits()
333 ctx->push(from_unsigned_cell(float_bits((float)untag_float_check(ctx->pop()))));
336 /* Allocates memory */
337 void factor_vm::primitive_bits_float()
339 ctx->push(allot_float(bits_float((u32)to_cell(ctx->pop()))));
342 void factor_vm::primitive_double_bits()
344 ctx->push(from_unsigned_8(double_bits(untag_float_check(ctx->pop()))));
347 /* Allocates memory */
348 void factor_vm::primitive_bits_double()
350 ctx->push(allot_float(bits_double(to_unsigned_8(ctx->pop()))));
353 /* Cannot allocate */
354 fixnum factor_vm::to_fixnum(cell tagged)
359 return untag_fixnum(tagged);
361 return bignum_to_fixnum(untag<bignum>(tagged));
363 type_error(FIXNUM_TYPE,tagged);
364 return 0; /* can't happen */
368 VM_C_API fixnum to_fixnum(cell tagged, factor_vm *parent)
370 return parent->to_fixnum(tagged);
373 cell factor_vm::to_cell(cell tagged)
375 return (cell)to_fixnum(tagged);
378 VM_C_API cell to_cell(cell tagged, factor_vm *parent)
380 return parent->to_cell(tagged);
383 /* Allocates memory */
384 VM_C_API cell from_signed_cell(fixnum integer, factor_vm *parent)
386 return parent->from_signed_cell(integer);
389 /* Allocates memory */
390 VM_C_API cell from_unsigned_cell(cell integer, factor_vm *parent)
392 return parent->from_unsigned_cell(integer);
395 /* Allocates memory */
396 cell factor_vm::from_signed_8(s64 n)
398 if(n < fixnum_min || n > fixnum_max)
399 return tag<bignum>(long_long_to_bignum(n));
401 return tag_fixnum((fixnum)n);
404 VM_C_API cell from_signed_8(s64 n, factor_vm *parent)
406 return parent->from_signed_8(n);
409 /* Cannot allocate */
410 s64 factor_vm::to_signed_8(cell obj)
412 switch(tagged<object>(obj).type())
415 return untag_fixnum(obj);
417 return bignum_to_long_long(untag<bignum>(obj));
419 type_error(BIGNUM_TYPE,obj);
424 VM_C_API s64 to_signed_8(cell obj, factor_vm *parent)
426 return parent->to_signed_8(obj);
429 /* Allocates memory */
430 cell factor_vm::from_unsigned_8(u64 n)
432 if(n > (u64)fixnum_max)
433 return tag<bignum>(ulong_long_to_bignum(n));
435 return tag_fixnum((fixnum)n);
438 VM_C_API cell from_unsigned_8(u64 n, factor_vm *parent)
440 return parent->from_unsigned_8(n);
443 /* Cannot allocate */
444 u64 factor_vm::to_unsigned_8(cell obj)
446 switch(tagged<object>(obj).type())
449 return untag_fixnum(obj);
451 return bignum_to_ulong_long(untag<bignum>(obj));
453 type_error(BIGNUM_TYPE,obj);
458 VM_C_API u64 to_unsigned_8(cell obj, factor_vm *parent)
460 return parent->to_unsigned_8(obj);
463 /* Cannot allocate */
464 float factor_vm::to_float(cell value)
466 return (float)untag_float_check(value);
469 /* Cannot allocate */
470 double factor_vm::to_double(cell value)
472 return untag_float_check(value);
475 /* The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
476 overflow, they call these functions. */
477 /* Allocates memory */
478 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y)
480 ctx->replace(tag<bignum>(fixnum_to_bignum(
481 untag_fixnum(x) + untag_fixnum(y))));
484 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm *parent)
486 parent->overflow_fixnum_add(x,y);
489 /* Allocates memory */
490 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y)
492 ctx->replace(tag<bignum>(fixnum_to_bignum(
493 untag_fixnum(x) - untag_fixnum(y))));
496 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm *parent)
498 parent->overflow_fixnum_subtract(x,y);
501 /* Allocates memory */
502 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y)
504 bignum *bx = fixnum_to_bignum(x);
506 bignum *by = fixnum_to_bignum(y);
508 ctx->replace(tag<bignum>(bignum_multiply(bx,by)));
511 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm *parent)
513 parent->overflow_fixnum_multiply(x,y);