Enable 64bit integer support on 32bit arch --enable-zend-int64
#19079
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I think this should go through the RFC process. There have been suggestions to drop 32-bit support, so I'm sure at least some people would object to expanding support further. I could see this as an alternative to dropping 32-bit support iff we also dropped 4-byte zend_long support, as that would align 32 and 64-bit. |
Girgias
reviewed
Jul 9, 2025
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| void gmp_set_zlong(mpz_t z, zend_long zlong) { | ||
| if (zlong <= GMP_SI_MAX && zlong >= GMP_SI_MIN) { | ||
| mpz_set_si(z, zlong); | ||
| } else if (zlong >= 0) { | ||
| mpz_import(z, 1, 1, sizeof(zend_long), 0, 0, &zlong); | ||
| } else { | ||
| mpz_import(z, 1, 1, sizeof(zend_long), 0, 0, &zlong); | ||
| mpz_neg(z, z); | ||
| } | ||
| } | ||
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| int gmp_fits_zlong_p(mpz_t z) { | ||
| int result = 1; | ||
| mpz_t z_min_max; | ||
| zend_long min_max; | ||
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| if (mpz_cmp_si(z, GMP_SI_MAX) > 0) { | ||
| min_max = ZEND_LONG_MAX; | ||
| mpz_init(z_min_max); | ||
| mpz_import(z_min_max, 1, 1, sizeof(zend_long), 0, 0, &min_max); | ||
| result = mpz_cmp(z, z_min_max) <= 0; | ||
| mpz_clear(z_min_max); | ||
| } else if (mpz_cmp_si(z, GMP_SI_MIN) < 0) { | ||
| min_max = ZEND_LONG_MIN; | ||
| mpz_init(z_min_max); | ||
| mpz_import(z_min_max, 1, 1, sizeof(zend_long), 0, 0, &min_max); | ||
| mpz_neg(z_min_max, z_min_max); | ||
| result = mpz_cmp(z, z_min_max) >= 0; | ||
| mpz_clear(z_min_max); | ||
| } | ||
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| return result; | ||
| } | ||
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I have fixed some cases which failed due to SIZEOF_SIZE_T != SIZEOF_ZEND_LONG, but there are probably more. Currently, the test state is as follows: |
Yes, of course. At the current state I want to get to know the work needed to be done and do some benchmarks. For dropping 32-bit support entirely it seems to be to early at least for WebAssembly + there might be people hoping for supporting older (in some cases not that old) systems - so I don't thing it would go through currently. |
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This PR allows to use 64bit integers on 32bit platforms if compiled with
--enable-zend-int64--enable-zend-int64)PHP_SYS_SIZE = [4|8])Zend/tests/andtests/ext/The main part is that
ZEND_ENABLE_ZVAL_LONG64 1gets defined.