diff options
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 60 |
1 files changed, 0 insertions, 60 deletions
@@ -558,55 +558,6 @@ rb_absint_size(VALUE val, int *nlz_bits_ret) } static size_t -absint_numwords_bytes(size_t numbytes, int nlz_bits_in_msbyte, size_t word_numbits, size_t *nlz_bits_ret) -{ - /* - * word_numbytes = word_numbits / CHAR_BIT - * div, mod = val_numbits.divmod(word_numbits) - * - * q, r = numbytes.divmod(word_numbytes) - * s = q if r * CHAR_BIT >= nlz_bits_in_msbyte - * = q - 1 if otherwise - * t = r * CHAR_BIT - nlz_bits_in_msbyte if r * CHAR_BIT >= nlz_bits_in_msbyte - * = word_numbits + r * CHAR_BIT - nlz_bits_in_msbyte if otherwise - * - * div = (numbytes * CHAR_BIT - nlz_bits_in_msbyte) / word_numbits - * = ((q * word_numbytes + r) * CHAR_BIT - nlz_bits_in_msbyte) / word_numbits - * = (q * word_numbytes * CHAR_BIT + r * CHAR_BIT - nlz_bits_in_msbyte) / word_numbits - * = q + (r * CHAR_BIT - nlz_bits_in_msbyte) / word_numbits if r * CHAR_BIT >= nlz_bits_in_msbyte - * q - 1 + (word_numbits + r * CHAR_BIT - nlz_bits_in_msbyte) / word_numbits if r * CHAR_BIT < nlz_bits_in_msbyte - * = s + t / word_numbits - * mod = (r * CHAR_BIT - nlz_bits_in_msbyte) % word_numbits if r * CHAR_BIT >= nlz_bits_in_msbyte - * (word_numbits + r * CHAR_BIT - nlz_bits_in_msbyte) % word_numbits if r * CHAR_BIT < nlz_bits_in_msbyte - * = t % word_numbits - * - * numwords = mod == 0 ? div : div + 1 - * nlz_bits = mod == 0 ? 0 : word_numbits - mod - */ - size_t word_numbytes = word_numbits / CHAR_BIT; - size_t q = numbytes / word_numbytes; - size_t r = numbytes % word_numbytes; - size_t s, t; - size_t div, mod; - size_t numwords; - size_t nlz_bits; - if (r * CHAR_BIT >= (size_t)nlz_bits_in_msbyte) { - s = q; - t = r * CHAR_BIT - nlz_bits_in_msbyte; - } - else { - s = q - 1; - t = word_numbits - nlz_bits_in_msbyte + r * CHAR_BIT; - } - div = s + t / word_numbits; - mod = t % word_numbits; - numwords = mod == 0 ? div : div + 1; - nlz_bits = mod == 0 ? 0 : word_numbits - mod; - *nlz_bits_ret = nlz_bits; - return numwords; -} - -static size_t absint_numwords_small(size_t numbytes, int nlz_bits_in_msbyte, size_t word_numbits, size_t *nlz_bits_ret) { size_t val_numbits = numbytes * CHAR_BIT - nlz_bits_in_msbyte; @@ -712,17 +663,6 @@ rb_absint_numwords(VALUE val, size_t word_numbits, size_t *nlz_bits_ret) } #endif } - else if (word_numbits % CHAR_BIT == 0) { - numwords = absint_numwords_bytes(numbytes, nlz_bits_in_msbyte, word_numbits, &nlz_bits); -#ifdef DEBUG_INTEGER_PACK - { - size_t numwords0, nlz_bits0; - numwords0 = absint_numwords_generic(numbytes, nlz_bits_in_msbyte, word_numbits, &nlz_bits0); - assert(numwords0 == numwords); - assert(nlz_bits0 == nlz_bits); - } -#endif - } else { numwords = absint_numwords_generic(numbytes, nlz_bits_in_msbyte, word_numbits, &nlz_bits); } |