5 void factor_vm::primitive_bignum_to_fixnum() {
6 ctx->replace(tag_fixnum(bignum_to_fixnum(untag<bignum>(ctx->peek()))));
9 void factor_vm::primitive_float_to_fixnum() {
10 ctx->replace(tag_fixnum(float_to_fixnum(ctx->peek())));
13 /* does not allocate, even though from_signed_cell can allocate */
14 /* Division can only overflow when we are dividing the most negative fixnum
16 void factor_vm::primitive_fixnum_divint() {
17 fixnum y = untag_fixnum(ctx->pop());
18 fixnum x = untag_fixnum(ctx->peek());
19 fixnum result = x / y;
20 if (result == -fixnum_min)
21 /* Does not allocate */
22 ctx->replace(from_signed_cell(-fixnum_min));
24 ctx->replace(tag_fixnum(result));
27 /* does not allocate, even though from_signed_cell can allocate */
28 void factor_vm::primitive_fixnum_divmod() {
29 cell* s0 = (cell*)(ctx->datastack);
30 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
31 fixnum y = untag_fixnum(*s0);
32 fixnum x = untag_fixnum(*s1);
33 if (y == -1 && x == fixnum_min) {
34 /* Does not allocate */
35 *s1 = from_signed_cell(-fixnum_min);
38 *s1 = tag_fixnum(x / y);
39 *s0 = tag_fixnum(x % y);
44 * If we're shifting right by n bits, we won't overflow as long as none of the
45 * high WORD_SIZE-TAG_BITS-n bits are set.
47 inline fixnum factor_vm::sign_mask(fixnum x) { return x >> (WORD_SIZE - 1); }
49 inline fixnum factor_vm::branchless_max(fixnum x, fixnum y) {
50 return (x - ((x - y) & sign_mask(x - y)));
53 inline fixnum factor_vm::branchless_abs(fixnum x) {
54 return (x ^ sign_mask(x)) - sign_mask(x);
57 void factor_vm::primitive_fixnum_shift() {
58 fixnum y = untag_fixnum(ctx->pop());
59 fixnum x = untag_fixnum(ctx->peek());
64 y = branchless_max(y, -WORD_SIZE + 1);
65 ctx->replace(tag_fixnum(x >> -y));
67 } else if (y < WORD_SIZE - TAG_BITS) {
68 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
69 if (!(branchless_abs(x) & mask)) {
70 ctx->replace(tag_fixnum(x << y));
75 ctx->replace(tag<bignum>(bignum_arithmetic_shift(fixnum_to_bignum(x), y)));
78 void factor_vm::primitive_fixnum_to_bignum() {
79 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
82 void factor_vm::primitive_float_to_bignum() {
83 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
86 #define POP_BIGNUMS(x, y) \
87 bignum* y = untag<bignum>(ctx->pop()); \
88 bignum* x = untag<bignum>(ctx->peek());
90 void factor_vm::primitive_bignum_eq() {
92 ctx->replace(tag_boolean(bignum_equal_p(x, y)));
95 void factor_vm::primitive_bignum_add() {
97 ctx->replace(tag<bignum>(bignum_add(x, y)));
100 void factor_vm::primitive_bignum_subtract() {
102 ctx->replace(tag<bignum>(bignum_subtract(x, y)));
105 void factor_vm::primitive_bignum_multiply() {
107 ctx->replace(tag<bignum>(bignum_multiply(x, y)));
110 void factor_vm::primitive_bignum_divint() {
112 ctx->replace(tag<bignum>(bignum_quotient(x, y)));
115 void factor_vm::primitive_bignum_divmod() {
116 cell* s0 = (cell*)(ctx->datastack);
117 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
118 bignum* y = untag<bignum>(*s0);
119 bignum* x = untag<bignum>(*s1);
121 bignum_divide(x, y, &q, &r);
122 *s1 = tag<bignum>(q);
123 *s0 = tag<bignum>(r);
126 void factor_vm::primitive_bignum_mod() {
128 ctx->replace(tag<bignum>(bignum_remainder(x, y)));
131 void factor_vm::primitive_bignum_gcd() {
133 ctx->replace(tag<bignum>(bignum_gcd(x, y)));
136 void factor_vm::primitive_bignum_and() {
138 ctx->replace(tag<bignum>(bignum_bitwise_and(x, y)));
141 void factor_vm::primitive_bignum_or() {
143 ctx->replace(tag<bignum>(bignum_bitwise_ior(x, y)));
146 void factor_vm::primitive_bignum_xor() {
148 ctx->replace(tag<bignum>(bignum_bitwise_xor(x, y)));
151 void factor_vm::primitive_bignum_shift() {
152 fixnum y = untag_fixnum(ctx->pop());
153 bignum* x = untag<bignum>(ctx->peek());
154 ctx->replace(tag<bignum>(bignum_arithmetic_shift(x, y)));
157 void factor_vm::primitive_bignum_less() {
159 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_less));
162 void factor_vm::primitive_bignum_lesseq() {
164 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_greater));
167 void factor_vm::primitive_bignum_greater() {
169 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_greater));
172 void factor_vm::primitive_bignum_greatereq() {
174 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_less));
177 void factor_vm::primitive_bignum_not() {
178 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
181 void factor_vm::primitive_bignum_bitp() {
182 int bit = (int)to_fixnum(ctx->pop());
183 bignum* x = untag<bignum>(ctx->peek());
184 ctx->replace(tag_boolean(bignum_logbitp(bit, x)));
187 void factor_vm::primitive_bignum_log2() {
188 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
191 /* Allocates memory */
192 cell factor_vm::unbox_array_size_slow() {
193 if (tagged<object>(ctx->peek()).type() == BIGNUM_TYPE) {
194 bignum* zero = untag<bignum>(bignum_zero);
196 bignum* max = cell_to_bignum(array_size_max);
197 bignum* n = untag<bignum>(ctx->peek());
198 if (bignum_compare(n, zero) != bignum_comparison_less &&
199 bignum_compare(n, max) == bignum_comparison_less) {
201 return bignum_to_cell(n);
205 general_error(ERROR_ARRAY_SIZE, ctx->pop(), tag_fixnum(array_size_max));
206 return 0; /* can't happen */
209 /* Allocates memory */
210 void factor_vm::primitive_fixnum_to_float() {
211 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
214 /* Allocates memory */
215 void factor_vm::primitive_format_float() {
216 byte_array* array = allot_byte_array(100);
217 char* format = alien_offset(ctx->pop());
218 double value = untag_float_check(ctx->peek());
219 SNPRINTF(array->data<char>(), 99, format, value);
220 ctx->replace(tag<byte_array>(array));
223 #define POP_FLOATS(x, y) \
224 double y = untag_float(ctx->pop()); \
225 double x = untag_float(ctx->peek());
227 void factor_vm::primitive_float_eq() {
229 ctx->replace(tag_boolean(x == y));
232 /* Allocates memory */
233 void factor_vm::primitive_float_add() {
235 ctx->replace(allot_float(x + y));
238 /* Allocates memory */
239 void factor_vm::primitive_float_subtract() {
241 ctx->replace(allot_float(x - y));
244 /* Allocates memory */
245 void factor_vm::primitive_float_multiply() {
247 ctx->replace(allot_float(x * y));
250 /* Allocates memory */
251 void factor_vm::primitive_float_divfloat() {
253 ctx->replace(allot_float(x / y));
256 void factor_vm::primitive_float_less() {
258 ctx->replace(tag_boolean(x < y));
261 void factor_vm::primitive_float_lesseq() {
263 ctx->replace(tag_boolean(x <= y));
266 void factor_vm::primitive_float_greater() {
268 ctx->replace(tag_boolean(x > y));
271 void factor_vm::primitive_float_greatereq() {
273 ctx->replace(tag_boolean(x >= y));
276 /* Allocates memory */
277 void factor_vm::primitive_float_bits() {
279 from_unsigned_cell(float_bits((float)untag_float_check(ctx->pop()))));
282 /* Allocates memory */
283 void factor_vm::primitive_bits_float() {
284 ctx->push(allot_float(bits_float((uint32_t)to_cell(ctx->pop()))));
287 void factor_vm::primitive_double_bits() {
288 ctx->push(from_unsigned_8(double_bits(untag_float_check(ctx->pop()))));
291 /* Allocates memory */
292 void factor_vm::primitive_bits_double() {
293 ctx->push(allot_float(bits_double(to_unsigned_8(ctx->pop()))));
296 /* Cannot allocate */
297 fixnum factor_vm::to_fixnum(cell tagged) {
298 switch (TAG(tagged)) {
300 return untag_fixnum(tagged);
302 return bignum_to_fixnum(untag<bignum>(tagged));
304 type_error(FIXNUM_TYPE, tagged);
305 return 0; /* can't happen */
309 VM_C_API fixnum to_fixnum(cell tagged, factor_vm* parent) {
310 return parent->to_fixnum(tagged);
313 cell factor_vm::to_cell(cell tagged) { return (cell)to_fixnum(tagged); }
315 VM_C_API cell to_cell(cell tagged, factor_vm* parent) {
316 return parent->to_cell(tagged);
319 /* Allocates memory */
320 VM_C_API cell from_signed_cell(fixnum integer, factor_vm* parent) {
321 return parent->from_signed_cell(integer);
324 /* Allocates memory */
325 VM_C_API cell from_unsigned_cell(cell integer, factor_vm* parent) {
326 return parent->from_unsigned_cell(integer);
329 /* Allocates memory */
330 cell factor_vm::from_signed_8(int64_t n) {
331 if (n < fixnum_min || n > fixnum_max)
332 return tag<bignum>(long_long_to_bignum(n));
334 return tag_fixnum((fixnum)n);
337 VM_C_API cell from_signed_8(int64_t n, factor_vm* parent) {
338 return parent->from_signed_8(n);
341 /* Cannot allocate */
342 int64_t factor_vm::to_signed_8(cell obj) {
343 switch (tagged<object>(obj).type()) {
345 return untag_fixnum(obj);
347 return bignum_to_long_long(untag<bignum>(obj));
349 type_error(BIGNUM_TYPE, obj);
354 VM_C_API int64_t to_signed_8(cell obj, factor_vm* parent) {
355 return parent->to_signed_8(obj);
358 /* Allocates memory */
359 cell factor_vm::from_unsigned_8(uint64_t n) {
360 if (n > (uint64_t)fixnum_max)
361 return tag<bignum>(ulong_long_to_bignum(n));
363 return tag_fixnum((fixnum)n);
366 VM_C_API cell from_unsigned_8(uint64_t n, factor_vm* parent) {
367 return parent->from_unsigned_8(n);
370 /* Cannot allocate */
371 uint64_t factor_vm::to_unsigned_8(cell obj) {
372 switch (tagged<object>(obj).type()) {
374 return untag_fixnum(obj);
376 return bignum_to_ulong_long(untag<bignum>(obj));
378 type_error(BIGNUM_TYPE, obj);
383 VM_C_API uint64_t to_unsigned_8(cell obj, factor_vm* parent) {
384 return parent->to_unsigned_8(obj);
387 /* Cannot allocate */
388 float factor_vm::to_float(cell value) {
389 return (float)untag_float_check(value);
392 /* Cannot allocate */
393 double factor_vm::to_double(cell value) { return untag_float_check(value); }
395 /* The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
396 overflow, they call these functions. */
397 /* Allocates memory */
398 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y) {
400 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) + untag_fixnum(y))));
403 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent) {
404 parent->overflow_fixnum_add(x, y);
407 /* Allocates memory */
408 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y) {
410 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) - untag_fixnum(y))));
413 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent) {
414 parent->overflow_fixnum_subtract(x, y);
417 /* Allocates memory */
418 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y) {
419 bignum* bx = fixnum_to_bignum(x);
421 bignum* by = fixnum_to_bignum(y);
423 ctx->replace(tag<bignum>(bignum_multiply(bx, by)));
426 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent) {
427 parent->overflow_fixnum_multiply(x, y);