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 /* Allocates memory */
64 void factor_vm::primitive_fixnum_shift() {
65 fixnum y = untag_fixnum(ctx->pop());
66 fixnum x = untag_fixnum(ctx->peek());
71 y = branchless_max(y, -WORD_SIZE + 1);
72 ctx->replace(tag_fixnum(x >> -y));
74 } else if (y < WORD_SIZE - TAG_BITS) {
75 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
76 if (!(branchless_abs(x) & mask)) {
77 ctx->replace(tag_fixnum(x << y));
82 ctx->replace(tag<bignum>(bignum_arithmetic_shift(fixnum_to_bignum(x), y)));
85 /* Allocates memory */
86 void factor_vm::primitive_fixnum_to_bignum() {
87 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
90 /* Allocates memory */
91 void factor_vm::primitive_float_to_bignum() {
92 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
95 #define POP_BIGNUMS(x, y) \
96 bignum* y = untag<bignum>(ctx->pop()); \
97 bignum* x = untag<bignum>(ctx->peek());
99 void factor_vm::primitive_bignum_eq() {
101 ctx->replace(tag_boolean(bignum_equal_p(x, y)));
104 /* Allocates memory */
105 void factor_vm::primitive_bignum_add() {
107 ctx->replace(tag<bignum>(bignum_add(x, y)));
110 /* Allocates memory */
111 void factor_vm::primitive_bignum_subtract() {
113 ctx->replace(tag<bignum>(bignum_subtract(x, y)));
116 /* Allocates memory */
117 void factor_vm::primitive_bignum_multiply() {
119 ctx->replace(tag<bignum>(bignum_multiply(x, y)));
122 /* Allocates memory */
123 void factor_vm::primitive_bignum_divint() {
125 ctx->replace(tag<bignum>(bignum_quotient(x, y)));
128 /* Allocates memory */
129 void factor_vm::primitive_bignum_divmod() {
130 cell* s0 = (cell*)(ctx->datastack);
131 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
132 bignum* y = untag<bignum>(*s0);
133 bignum* x = untag<bignum>(*s1);
135 bignum_divide(x, y, &q, &r);
136 *s1 = tag<bignum>(q);
137 *s0 = bignum_maybe_to_fixnum(r);
140 void factor_vm::primitive_bignum_mod() {
142 cell val = bignum_maybe_to_fixnum(bignum_remainder(x, y));
146 void factor_vm::primitive_bignum_gcd() {
148 ctx->replace(tag<bignum>(bignum_gcd(x, y)));
151 void factor_vm::primitive_bignum_and() {
153 ctx->replace(tag<bignum>(bignum_bitwise_and(x, y)));
156 void factor_vm::primitive_bignum_or() {
158 ctx->replace(tag<bignum>(bignum_bitwise_ior(x, y)));
161 void factor_vm::primitive_bignum_xor() {
163 ctx->replace(tag<bignum>(bignum_bitwise_xor(x, y)));
166 /* Allocates memory */
167 void factor_vm::primitive_bignum_shift() {
168 fixnum y = untag_fixnum(ctx->pop());
169 bignum* x = untag<bignum>(ctx->peek());
170 ctx->replace(tag<bignum>(bignum_arithmetic_shift(x, y)));
173 void factor_vm::primitive_bignum_less() {
175 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_less));
178 void factor_vm::primitive_bignum_lesseq() {
180 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_greater));
183 void factor_vm::primitive_bignum_greater() {
185 ctx->replace(tag_boolean(bignum_compare(x, y) == bignum_comparison_greater));
188 void factor_vm::primitive_bignum_greatereq() {
190 ctx->replace(tag_boolean(bignum_compare(x, y) != bignum_comparison_less));
193 void factor_vm::primitive_bignum_not() {
194 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
197 void factor_vm::primitive_bignum_bitp() {
198 int bit = (int)to_fixnum(ctx->pop());
199 bignum* x = untag<bignum>(ctx->peek());
200 ctx->replace(tag_boolean(bignum_logbitp(bit, x)));
203 void factor_vm::primitive_bignum_log2() {
204 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
207 /* Allocates memory */
208 void factor_vm::primitive_fixnum_to_float() {
209 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
212 /* Allocates memory */
213 void factor_vm::primitive_format_float() {
214 byte_array* array = allot_byte_array(100);
215 char* format = alien_offset(ctx->pop());
216 double value = untag_float_check(ctx->peek());
217 SNPRINTF(array->data<char>(), 99, format, value);
218 ctx->replace(tag<byte_array>(array));
221 #define POP_FLOATS(x, y) \
222 double y = untag_float(ctx->pop()); \
223 double x = untag_float(ctx->peek());
225 void factor_vm::primitive_float_eq() {
227 ctx->replace(tag_boolean(x == y));
230 /* Allocates memory */
231 void factor_vm::primitive_float_add() {
233 ctx->replace(allot_float(x + y));
236 /* Allocates memory */
237 void factor_vm::primitive_float_subtract() {
239 ctx->replace(allot_float(x - y));
242 /* Allocates memory */
243 void factor_vm::primitive_float_multiply() {
245 ctx->replace(allot_float(x * y));
248 /* Allocates memory */
249 void factor_vm::primitive_float_divfloat() {
251 ctx->replace(allot_float(x / y));
254 void factor_vm::primitive_float_less() {
256 ctx->replace(tag_boolean(x < y));
259 void factor_vm::primitive_float_lesseq() {
261 ctx->replace(tag_boolean(x <= y));
264 void factor_vm::primitive_float_greater() {
266 ctx->replace(tag_boolean(x > y));
269 void factor_vm::primitive_float_greatereq() {
271 ctx->replace(tag_boolean(x >= y));
274 /* Allocates memory */
275 void factor_vm::primitive_float_bits() {
277 from_unsigned_cell(float_bits((float)untag_float_check(ctx->peek()))));
280 /* Allocates memory */
281 void factor_vm::primitive_bits_float() {
282 ctx->replace(allot_float(bits_float((uint32_t)to_cell(ctx->peek()))));
285 void factor_vm::primitive_double_bits() {
286 ctx->replace(from_unsigned_8(double_bits(untag_float_check(ctx->peek()))));
289 /* Allocates memory */
290 void factor_vm::primitive_bits_double() {
291 ctx->replace(allot_float(bits_double(to_unsigned_8(ctx->peek()))));
294 /* Cannot allocate. */
295 #define CELL_TO_FOO(name, type, converter) \
296 type factor_vm::name(cell tagged) { \
297 switch (TAG(tagged)) { \
299 return (type)untag_fixnum(tagged); \
301 return converter(untag<bignum>(tagged)); \
303 type_error(FIXNUM_TYPE, tagged); \
304 return 0; /* can't happen */ \
307 VM_C_API type name(cell tagged, factor_vm* parent) { \
308 return parent->name(tagged); \
311 CELL_TO_FOO(to_fixnum, fixnum, bignum_to_fixnum)
312 CELL_TO_FOO(to_fixnum_strict, fixnum, bignum_to_fixnum_strict)
313 CELL_TO_FOO(to_cell, cell, bignum_to_cell)
314 CELL_TO_FOO(to_signed_8, int64_t, bignum_to_long_long)
315 CELL_TO_FOO(to_unsigned_8, uint64_t, bignum_to_ulong_long)
317 /* Allocates memory */
318 VM_C_API cell from_signed_cell(fixnum integer, factor_vm* parent) {
319 return parent->from_signed_cell(integer);
322 /* Allocates memory */
323 VM_C_API cell from_unsigned_cell(cell integer, factor_vm* parent) {
324 return parent->from_unsigned_cell(integer);
327 /* Allocates memory */
328 cell factor_vm::from_signed_8(int64_t n) {
329 if (n < fixnum_min || n > fixnum_max)
330 return tag<bignum>(long_long_to_bignum(n));
332 return tag_fixnum((fixnum)n);
335 VM_C_API cell from_signed_8(int64_t n, factor_vm* parent) {
336 return parent->from_signed_8(n);
339 /* Allocates memory */
340 cell factor_vm::from_unsigned_8(uint64_t n) {
341 if (n > (uint64_t)fixnum_max)
342 return tag<bignum>(ulong_long_to_bignum(n));
344 return tag_fixnum((fixnum)n);
347 VM_C_API cell from_unsigned_8(uint64_t n, factor_vm* parent) {
348 return parent->from_unsigned_8(n);
351 /* Cannot allocate */
352 float factor_vm::to_float(cell value) {
353 return (float)untag_float_check(value);
356 /* Cannot allocate */
357 double factor_vm::to_double(cell value) { return untag_float_check(value); }
359 /* The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
360 overflow, they call these functions. */
361 /* Allocates memory */
362 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y) {
364 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) + untag_fixnum(y))));
367 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent) {
368 parent->overflow_fixnum_add(x, y);
371 /* Allocates memory */
372 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y) {
374 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) - untag_fixnum(y))));
377 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent) {
378 parent->overflow_fixnum_subtract(x, y);
381 /* Allocates memory */
382 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y) {
383 data_root<bignum> bx(fixnum_to_bignum(x), this);
384 data_root<bignum> by(fixnum_to_bignum(y), this);
385 cell ret = tag<bignum>(bignum_multiply(bx.untagged(), by.untagged()));
389 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent) {
390 parent->overflow_fixnum_multiply(x, y);