8 void factor_vm::primitive_bignum_to_fixnum() {
9 ctx->replace(tag_fixnum(bignum_to_fixnum(untag<bignum>(ctx->peek()))));
12 void factor_vm::primitive_bignum_to_fixnum_strict() {
13 ctx->replace(tag_fixnum(bignum_to_fixnum_strict(untag<bignum>(ctx->peek()))));
16 void factor_vm::primitive_float_to_fixnum() {
17 ctx->replace(tag_fixnum(float_to_fixnum(ctx->peek())));
20 // does not allocate, even though from_signed_cell can allocate
21 // Division can only overflow when we are dividing the most negative fixnum
23 void factor_vm::primitive_fixnum_divint() {
24 fixnum y = untag_fixnum(ctx->pop());
25 fixnum x = untag_fixnum(ctx->peek());
26 fixnum result = x / y;
27 if (result == -fixnum_min)
29 ctx->replace(from_signed_cell(-fixnum_min));
31 ctx->replace(tag_fixnum(result));
34 // does not allocate, even though from_signed_cell can allocate
35 void factor_vm::primitive_fixnum_divmod() {
36 cell* s0 = (cell*)(ctx->datastack);
37 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
38 fixnum y = untag_fixnum(*s0);
39 fixnum x = untag_fixnum(*s1);
40 if (y == -1 && x == fixnum_min) {
42 *s1 = from_signed_cell(-fixnum_min);
45 *s1 = tag_fixnum(x / y);
46 *s0 = tag_fixnum(x % y);
51 // If we're shifting right by n bits, we won't overflow as long as none of the
52 // high WORD_SIZE-TAG_BITS-n bits are set.
53 inline fixnum factor_vm::sign_mask(fixnum x) {
54 return x >> (WORD_SIZE - 1);
57 inline fixnum factor_vm::branchless_max(fixnum x, fixnum y) {
58 return (x - ((x - y) & sign_mask(x - y)));
61 inline fixnum factor_vm::branchless_abs(fixnum x) {
62 return (x ^ sign_mask(x)) - sign_mask(x);
66 void factor_vm::primitive_fixnum_shift() {
67 fixnum y = untag_fixnum(ctx->pop());
68 fixnum x = untag_fixnum(ctx->peek());
73 y = branchless_max(y, -WORD_SIZE + 1);
74 ctx->replace(tag_fixnum(x >> -y));
76 } else if (y < WORD_SIZE - TAG_BITS) {
77 fixnum mask = -((fixnum)1 << (WORD_SIZE - 1 - TAG_BITS - y));
78 if (!(branchless_abs(x) & mask)) {
79 ctx->replace(tag_fixnum(x << y));
84 ctx->replace(tag<bignum>(bignum_arithmetic_shift(fixnum_to_bignum(x), y)));
88 void factor_vm::primitive_fixnum_to_bignum() {
89 ctx->replace(tag<bignum>(fixnum_to_bignum(untag_fixnum(ctx->peek()))));
93 void factor_vm::primitive_float_to_bignum() {
94 ctx->replace(tag<bignum>(float_to_bignum(ctx->peek())));
97 #define POP_BIGNUMS(x, y) \
98 bignum* y = untag<bignum>(ctx->pop()); \
99 bignum* x = untag<bignum>(ctx->peek());
101 void factor_vm::primitive_bignum_eq() {
103 ctx->replace(tag_boolean(bignum_equal_p(x, y)));
107 void factor_vm::primitive_bignum_add() {
109 ctx->replace(tag<bignum>(bignum_add(x, y)));
113 void factor_vm::primitive_bignum_subtract() {
115 ctx->replace(tag<bignum>(bignum_subtract(x, y)));
119 void factor_vm::primitive_bignum_multiply() {
121 ctx->replace(tag<bignum>(bignum_multiply(x, y)));
125 void factor_vm::primitive_bignum_divint() {
127 ctx->replace(tag<bignum>(bignum_quotient(x, y)));
131 void factor_vm::primitive_bignum_divmod() {
132 cell* s0 = (cell*)(ctx->datastack);
133 cell* s1 = (cell*)(ctx->datastack - sizeof(cell));
134 bignum* y = untag<bignum>(*s0);
135 bignum* x = untag<bignum>(*s1);
137 bignum_divide(x, y, &q, &r);
138 *s1 = tag<bignum>(q);
139 *s0 = bignum_maybe_to_fixnum(r);
142 void factor_vm::primitive_bignum_mod() {
144 cell val = bignum_maybe_to_fixnum(bignum_remainder(x, y));
148 void factor_vm::primitive_bignum_gcd() {
150 ctx->replace(tag<bignum>(bignum_gcd(x, y)));
153 void factor_vm::primitive_bignum_and() {
155 ctx->replace(tag<bignum>(bignum_bitwise_and(x, y)));
158 void factor_vm::primitive_bignum_or() {
160 ctx->replace(tag<bignum>(bignum_bitwise_ior(x, y)));
163 void factor_vm::primitive_bignum_xor() {
165 ctx->replace(tag<bignum>(bignum_bitwise_xor(x, y)));
169 void factor_vm::primitive_bignum_shift() {
170 fixnum y = untag_fixnum(ctx->pop());
171 bignum* x = untag<bignum>(ctx->peek());
172 ctx->replace(tag<bignum>(bignum_arithmetic_shift(x, y)));
175 void factor_vm::primitive_bignum_less() {
177 ctx->replace(tag_boolean(bignum_compare(x, y) == BIGNUM_COMPARISON_LESS));
180 void factor_vm::primitive_bignum_lesseq() {
182 ctx->replace(tag_boolean(bignum_compare(x, y) != BIGNUM_COMPARISON_GREATER));
185 void factor_vm::primitive_bignum_greater() {
187 ctx->replace(tag_boolean(bignum_compare(x, y) == BIGNUM_COMPARISON_GREATER));
190 void factor_vm::primitive_bignum_greatereq() {
192 ctx->replace(tag_boolean(bignum_compare(x, y) != BIGNUM_COMPARISON_LESS));
195 void factor_vm::primitive_bignum_not() {
196 ctx->replace(tag<bignum>(bignum_bitwise_not(untag<bignum>(ctx->peek()))));
199 void factor_vm::primitive_bignum_bitp() {
200 int bit = (int)to_fixnum(ctx->pop());
201 bignum* x = untag<bignum>(ctx->peek());
202 ctx->replace(tag_boolean(bignum_logbitp(bit, x)));
205 void factor_vm::primitive_bignum_log2() {
206 ctx->replace(tag<bignum>(bignum_integer_length(untag<bignum>(ctx->peek()))));
210 void factor_vm::primitive_fixnum_to_float() {
211 ctx->replace(allot_float(fixnum_to_float(ctx->peek())));
215 void factor_vm::primitive_format_float() {
216 char* locale = alien_offset(ctx->pop());
217 char* format = alien_offset(ctx->pop());
218 fixnum precision = untag_fixnum(ctx->pop());
219 fixnum width = untag_fixnum(ctx->pop());
220 char* fill = alien_offset(ctx->pop());
221 double value = untag_float_check(ctx->peek());
222 std::ostringstream localized_stream;
224 localized_stream.imbue(std::locale(locale));
225 } catch (const runtime_error&) {
226 byte_array* array = allot_byte_array(0);
227 ctx->replace(tag<byte_array>(array));
231 case 'f': localized_stream << std::fixed; break;
232 case 'e': localized_stream << std::scientific; break;
234 if (isupper(format[0])) {
235 localized_stream << std::uppercase;
237 if (fill[0] != '\0') {
238 localized_stream << std::setfill(fill[0]);
241 localized_stream << std::setw(width);
243 if (precision >= 0) {
244 localized_stream << std::setprecision(precision);
246 localized_stream << value;
247 const std::string& tmp = localized_stream.str();
248 const char* cstr = tmp.c_str();
249 size_t size = tmp.length();
250 byte_array* array = allot_byte_array(size);
251 memcpy(array->data<char>(), cstr, size);
252 ctx->replace(tag<byte_array>(array));
255 #define POP_FLOATS(x, y) \
256 double y = untag_float(ctx->pop()); \
257 double x = untag_float(ctx->peek());
259 void factor_vm::primitive_float_eq() {
261 ctx->replace(tag_boolean(x == y));
265 void factor_vm::primitive_float_add() {
267 ctx->replace(allot_float(x + y));
271 void factor_vm::primitive_float_subtract() {
273 ctx->replace(allot_float(x - y));
277 void factor_vm::primitive_float_multiply() {
279 ctx->replace(allot_float(x * y));
283 void factor_vm::primitive_float_divfloat() {
285 ctx->replace(allot_float(x / y));
288 void factor_vm::primitive_float_less() {
290 ctx->replace(tag_boolean(x < y));
293 void factor_vm::primitive_float_lesseq() {
295 ctx->replace(tag_boolean(x <= y));
298 void factor_vm::primitive_float_greater() {
300 ctx->replace(tag_boolean(x > y));
303 void factor_vm::primitive_float_greatereq() {
305 ctx->replace(tag_boolean(x >= y));
309 void factor_vm::primitive_float_bits() {
311 from_unsigned_cell(float_bits((float)untag_float_check(ctx->peek()))));
315 void factor_vm::primitive_bits_float() {
316 ctx->replace(allot_float(bits_float((uint32_t)to_cell(ctx->peek()))));
319 void factor_vm::primitive_double_bits() {
320 ctx->replace(from_unsigned_8(double_bits(untag_float_check(ctx->peek()))));
324 void factor_vm::primitive_bits_double() {
325 ctx->replace(allot_float(bits_double(to_unsigned_8(ctx->peek()))));
329 #define CELL_TO_FOO(name, type, converter) \
330 type factor_vm::name(cell tagged) { \
331 switch (TAG(tagged)) { \
333 return (type)untag_fixnum(tagged); \
335 return converter(untag<bignum>(tagged)); \
337 type_error(FIXNUM_TYPE, tagged); \
338 return 0; /* can't happen */ \
341 VM_C_API type name(cell tagged, factor_vm* parent) { \
342 return parent->name(tagged); \
345 CELL_TO_FOO(to_fixnum, fixnum, bignum_to_fixnum)
346 CELL_TO_FOO(to_fixnum_strict, fixnum, bignum_to_fixnum_strict)
347 CELL_TO_FOO(to_cell, cell, bignum_to_cell)
348 CELL_TO_FOO(to_signed_8, int64_t, bignum_to_long_long)
349 CELL_TO_FOO(to_unsigned_8, uint64_t, bignum_to_ulong_long)
352 VM_C_API cell from_signed_cell(fixnum integer, factor_vm* parent) {
353 return parent->from_signed_cell(integer);
357 VM_C_API cell from_unsigned_cell(cell integer, factor_vm* parent) {
358 return parent->from_unsigned_cell(integer);
362 cell factor_vm::from_signed_8(int64_t n) {
363 if (n < fixnum_min || n > fixnum_max)
364 return tag<bignum>(long_long_to_bignum(n));
366 return tag_fixnum((fixnum)n);
369 VM_C_API cell from_signed_8(int64_t n, factor_vm* parent) {
370 return parent->from_signed_8(n);
374 cell factor_vm::from_unsigned_8(uint64_t n) {
375 if (n > (uint64_t)fixnum_max)
376 return tag<bignum>(ulong_long_to_bignum(n));
378 return tag_fixnum((fixnum)n);
381 VM_C_API cell from_unsigned_8(uint64_t n, factor_vm* parent) {
382 return parent->from_unsigned_8(n);
386 float factor_vm::to_float(cell value) {
387 return (float)untag_float_check(value);
391 double factor_vm::to_double(cell value) { return untag_float_check(value); }
393 // The fixnum+, fixnum- and fixnum* primitives are defined in cpu_*.S. On
394 // overflow, they call these functions.
396 inline void factor_vm::overflow_fixnum_add(fixnum x, fixnum y) {
398 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) + untag_fixnum(y))));
401 VM_C_API void overflow_fixnum_add(fixnum x, fixnum y, factor_vm* parent) {
402 parent->overflow_fixnum_add(x, y);
406 inline void factor_vm::overflow_fixnum_subtract(fixnum x, fixnum y) {
408 tag<bignum>(fixnum_to_bignum(untag_fixnum(x) - untag_fixnum(y))));
411 VM_C_API void overflow_fixnum_subtract(fixnum x, fixnum y, factor_vm* parent) {
412 parent->overflow_fixnum_subtract(x, y);
416 inline void factor_vm::overflow_fixnum_multiply(fixnum x, fixnum y) {
417 data_root<bignum> bx(fixnum_to_bignum(x), this);
418 data_root<bignum> by(fixnum_to_bignum(y), this);
419 cell ret = tag<bignum>(bignum_multiply(bx.untagged(), by.untagged()));
423 VM_C_API void overflow_fixnum_multiply(fixnum x, fixnum y, factor_vm* parent) {
424 parent->overflow_fixnum_multiply(x, y);