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_bignum_to_fixnum_strict() {
10 ctx->replace(tag_fixnum(bignum_to_fixnum_strict(untag<bignum>(ctx->peek()))));
13 void factor_vm::primitive_float_to_fixnum() {
14 ctx->replace(tag_fixnum(float_to_fixnum(ctx->peek())));
17 /* does not allocate, even though from_signed_cell can allocate */
18 /* Division can only overflow when we are dividing the most negative fixnum
20 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() {
33 cell* s0 = (cell*)(ctx->datastack);
34 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
35 fixnum y = untag_fixnum(*s0);
36 fixnum x = untag_fixnum(*s1);
37 if (y == -1 && x == fixnum_min) {
38 /* Does not allocate */
39 *s1 = from_signed_cell(-fixnum_min);
42 *s1 = tag_fixnum(x / y);
43 *s0 = tag_fixnum(x % y);
48 * If we're shifting right by n bits, we won't overflow as long as none of the
49 * high WORD_SIZE-TAG_BITS-n bits are set.
51 inline fixnum factor_vm::sign_mask(fixnum x) {
52 return x >> (WORD_SIZE - 1);
55 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) {
60 return (x ^ sign_mask(x)) - sign_mask(x);
63 void factor_vm::primitive_fixnum_shift() {
64 fixnum y = untag_fixnum(ctx->pop());
65 fixnum x = untag_fixnum(ctx->peek());
70 y = branchless_max(y, -WORD_SIZE + 1);
71 ctx->replace(tag_fixnum(x >> -y));
73 } else if (y < WORD_SIZE - TAG_BITS) {
74 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
75 if (!(branchless_abs(x) & mask)) {
76 ctx->replace(tag_fixnum(x << y));
81 ctx->replace(tag<bignum>(bignum_arithmetic_shift(fixnum_to_bignum(x), y)));
84 void factor_vm::primitive_fixnum_to_bignum() {
85 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
88 void factor_vm::primitive_float_to_bignum() {
89 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
92 #define POP_BIGNUMS(x, y) \
93 bignum* y = untag<bignum>(ctx->pop()); \
94 bignum* x = untag<bignum>(ctx->peek());
96 void factor_vm::primitive_bignum_eq() {
98 ctx->replace(tag_boolean(bignum_equal_p(x, y)));
101 void factor_vm::primitive_bignum_add() {
103 ctx->replace(tag<bignum>(bignum_add(x, y)));
106 void factor_vm::primitive_bignum_subtract() {
108 ctx->replace(tag<bignum>(bignum_subtract(x, y)));
111 void factor_vm::primitive_bignum_multiply() {
113 ctx->replace(tag<bignum>(bignum_multiply(x, y)));
116 void factor_vm::primitive_bignum_divint() {
118 ctx->replace(tag<bignum>(bignum_quotient(x, y)));
121 void factor_vm::primitive_bignum_divmod() {
122 cell* s0 = (cell*)(ctx->datastack);
123 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
124 bignum* y = untag<bignum>(*s0);
125 bignum* x = untag<bignum>(*s1);
127 bignum_divide(x, y, &q, &r);
128 *s1 = tag<bignum>(q);
129 *s0 = tag<bignum>(r);
132 void factor_vm::primitive_bignum_mod() {
134 ctx->replace(tag<bignum>(bignum_remainder(x, y)));
137 void factor_vm::primitive_bignum_gcd() {
139 ctx->replace(tag<bignum>(bignum_gcd(x, y)));
142 void factor_vm::primitive_bignum_and() {
144 ctx->replace(tag<bignum>(bignum_bitwise_and(x, y)));
147 void factor_vm::primitive_bignum_or() {
149 ctx->replace(tag<bignum>(bignum_bitwise_ior(x, y)));
152 void factor_vm::primitive_bignum_xor() {
154 ctx->replace(tag<bignum>(bignum_bitwise_xor(x, y)));
157 void factor_vm::primitive_bignum_shift() {
158 fixnum y = untag_fixnum(ctx->pop());
159 bignum* x = untag<bignum>(ctx->peek());
160 ctx->replace(tag<bignum>(bignum_arithmetic_shift(x, y)));
163 void factor_vm::primitive_bignum_less() {
165 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_less));
168 void factor_vm::primitive_bignum_lesseq() {
170 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_greater));
173 void factor_vm::primitive_bignum_greater() {
175 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_greater));
178 void factor_vm::primitive_bignum_greatereq() {
180 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_less));
183 void factor_vm::primitive_bignum_not() {
184 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
187 void factor_vm::primitive_bignum_bitp() {
188 int bit = (int)to_fixnum(ctx->pop());
189 bignum* x = untag<bignum>(ctx->peek());
190 ctx->replace(tag_boolean(bignum_logbitp(bit, x)));
193 void factor_vm::primitive_bignum_log2() {
194 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
197 /* Allocates memory */
198 void factor_vm::primitive_fixnum_to_float() {
199 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
202 /* Allocates memory */
203 void factor_vm::primitive_format_float() {
204 byte_array* array = allot_byte_array(100);
205 char* format = alien_offset(ctx->pop());
206 double value = untag_float_check(ctx->peek());
207 SNPRINTF(array->data<char>(), 99, format, value);
208 ctx->replace(tag<byte_array>(array));
211 #define POP_FLOATS(x, y) \
212 double y = untag_float(ctx->pop()); \
213 double x = untag_float(ctx->peek());
215 void factor_vm::primitive_float_eq() {
217 ctx->replace(tag_boolean(x == y));
220 /* Allocates memory */
221 void factor_vm::primitive_float_add() {
223 ctx->replace(allot_float(x + y));
226 /* Allocates memory */
227 void factor_vm::primitive_float_subtract() {
229 ctx->replace(allot_float(x - y));
232 /* Allocates memory */
233 void factor_vm::primitive_float_multiply() {
235 ctx->replace(allot_float(x * y));
238 /* Allocates memory */
239 void factor_vm::primitive_float_divfloat() {
241 ctx->replace(allot_float(x / y));
244 void factor_vm::primitive_float_less() {
246 ctx->replace(tag_boolean(x < y));
249 void factor_vm::primitive_float_lesseq() {
251 ctx->replace(tag_boolean(x <= y));
254 void factor_vm::primitive_float_greater() {
256 ctx->replace(tag_boolean(x > y));
259 void factor_vm::primitive_float_greatereq() {
261 ctx->replace(tag_boolean(x >= y));
264 /* Allocates memory */
265 void factor_vm::primitive_float_bits() {
267 from_unsigned_cell(float_bits((float)untag_float_check(ctx->peek()))));
270 /* Allocates memory */
271 void factor_vm::primitive_bits_float() {
272 ctx->replace(allot_float(bits_float((uint32_t)to_cell(ctx->peek()))));
275 void factor_vm::primitive_double_bits() {
276 ctx->replace(from_unsigned_8(double_bits(untag_float_check(ctx->peek()))));
279 /* Allocates memory */
280 void factor_vm::primitive_bits_double() {
281 ctx->replace(allot_float(bits_double(to_unsigned_8(ctx->peek()))));
284 /* Cannot allocate. */
285 #define CELL_TO_FOO(name, type, converter) \
286 type factor_vm::name(cell tagged) { \
287 switch (TAG(tagged)) { \
289 return (type)untag_fixnum(tagged); \
291 return converter(untag<bignum>(tagged)); \
293 type_error(FIXNUM_TYPE, tagged); \
294 return 0; /* can't happen */ \
297 VM_C_API type name(cell tagged, factor_vm* parent) { \
298 return parent->name(tagged); \
301 CELL_TO_FOO(to_fixnum, fixnum, bignum_to_fixnum)
302 CELL_TO_FOO(to_fixnum_strict, fixnum, bignum_to_fixnum_strict)
303 CELL_TO_FOO(to_cell, cell, bignum_to_cell)
304 CELL_TO_FOO(to_signed_8, int64_t, bignum_to_long_long)
305 CELL_TO_FOO(to_unsigned_8, uint64_t, bignum_to_ulong_long)
307 /* Allocates memory */
308 VM_C_API cell from_signed_cell(fixnum integer, factor_vm* parent) {
309 return parent->from_signed_cell(integer);
312 /* Allocates memory */
313 VM_C_API cell from_unsigned_cell(cell integer, factor_vm* parent) {
314 return parent->from_unsigned_cell(integer);
317 /* Allocates memory */
318 cell factor_vm::from_signed_8(int64_t n) {
319 if (n < fixnum_min || n > fixnum_max)
320 return tag<bignum>(long_long_to_bignum(n));
322 return tag_fixnum((fixnum)n);
325 VM_C_API cell from_signed_8(int64_t n, factor_vm* parent) {
326 return parent->from_signed_8(n);
329 /* Allocates memory */
330 cell factor_vm::from_unsigned_8(uint64_t n) {
331 if (n > (uint64_t)fixnum_max)
332 return tag<bignum>(ulong_long_to_bignum(n));
334 return tag_fixnum((fixnum)n);
337 VM_C_API cell from_unsigned_8(uint64_t n, factor_vm* parent) {
338 return parent->from_unsigned_8(n);
341 /* Cannot allocate */
342 float factor_vm::to_float(cell value) {
343 return (float)untag_float_check(value);
346 /* Cannot allocate */
347 double factor_vm::to_double(cell value) { return untag_float_check(value); }
349 /* The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
350 overflow, they call these functions. */
351 /* Allocates memory */
352 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y) {
354 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) + untag_fixnum(y))));
357 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent) {
358 parent->overflow_fixnum_add(x, y);
361 /* Allocates memory */
362 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y) {
364 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) - untag_fixnum(y))));
367 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent) {
368 parent->overflow_fixnum_subtract(x, y);
371 /* Allocates memory */
372 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y) {
373 bignum* bx = fixnum_to_bignum(x);
375 bignum* by = fixnum_to_bignum(y);
377 ctx->replace(tag<bignum>(bignum_multiply(bx, by)));
380 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent) {
381 parent->overflow_fixnum_multiply(x, y);