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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-06-22 11:38:19 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-06-22 11:38:19 +0000 |
commit | 972ae3e5389d4b35d6252b05e3bc0a4f22f29fc7 (patch) | |
tree | 160a5dfd5197e2d96ff7175a0a3bbaacb6344b88 | |
parent | 8f0c3ff6e49fad5263f9be52946e1c13f9bcf021 (diff) | |
download | ruby-972ae3e5389d4b35d6252b05e3bc0a4f22f29fc7.tar.gz |
* bignum.c (bary_unpack_internal): Specialized unpacker implemented.
(bary_unpack): Support INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION.
(rb_integer_unpack): Support INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41566 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r-- | ChangeLog | 6 | ||||
-rw-r--r-- | bignum.c | 171 | ||||
-rw-r--r-- | test/-ext-/bignum/test_pack.rb | 29 |
3 files changed, 195 insertions, 11 deletions
@@ -1,3 +1,9 @@ +Sat Jun 22 20:36:50 2013 Tanaka Akira <akr@fsij.org> + + * bignum.c (bary_unpack_internal): Specialized unpacker implemented. + (bary_unpack): Support INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION. + (rb_integer_unpack): Support INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION. + Sat Jun 22 18:53:10 2013 Tanaka Akira <akr@fsij.org> * bignum.c (bary_pack): Support @@ -1457,13 +1457,167 @@ static int bary_unpack_internal(BDIGIT *bdigits, size_t num_bdigits, const void *words, size_t numwords, size_t wordsize, size_t nails, int flags, int nlp_bits) { int sign; + const unsigned char *buf = words; + BDIGIT *dp; + BDIGIT *de; - if (num_bdigits != 0) { - const unsigned char *buf = words; + dp = bdigits; + de = dp + num_bdigits; - BDIGIT *dp; - BDIGIT *de; + if (!(flags & INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION)) { + if (nails == 0 && numwords == 1) { + int need_swap = wordsize != 1 && + (flags & INTEGER_PACK_BYTEORDER_MASK) != INTEGER_PACK_NATIVE_BYTE_ORDER && + ((flags & INTEGER_PACK_MSBYTE_FIRST) ? !HOST_BIGENDIAN_P : HOST_BIGENDIAN_P); + if (wordsize == 1) { + BDIGIT u = *(uint8_t *)buf; + if (flags & INTEGER_PACK_2COMP) { + sign = (flags & INTEGER_PACK_NEGATIVE) ? + ((sizeof(uint8_t) == SIZEOF_BDIGITS && u == 0) ? -2 : -1) : + ((u >> (sizeof(uint8_t) * CHAR_BIT - 1)) ? -1 : 1); + if (sign < 0) u = -(u | LSHIFTX((~(BDIGIT)0), sizeof(uint8_t) * CHAR_BIT)); + } + else + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + *dp = u; + return sign; + } +#if defined(HAVE_UINT16_T) && 2 <= SIZEOF_BDIGITS + if (wordsize == 2 && (uintptr_t)words % ALIGNOF(uint16_t) == 0) { + BDIGIT u = *(uint16_t *)buf; + if (need_swap) u = swap16(u); + if (flags & INTEGER_PACK_2COMP) { + sign = (flags & INTEGER_PACK_NEGATIVE) ? + ((sizeof(uint16_t) == SIZEOF_BDIGITS && u == 0) ? -2 : -1) : + ((u >> (sizeof(uint16_t) * CHAR_BIT - 1)) ? -1 : 1); + if (sign < 0) u = -(u | LSHIFTX((~(BDIGIT)0), sizeof(uint16_t) * CHAR_BIT)); + } + else + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + *dp = u; + return sign; + } +#endif +#if defined(HAVE_UINT32_T) && 4 <= SIZEOF_BDIGITS + if (wordsize == 4 && (uintptr_t)words % ALIGNOF(uint32_t) == 0) { + BDIGIT u = *(uint32_t *)buf; + if (need_swap) u = swap32(u); + if (flags & INTEGER_PACK_2COMP) { + sign = (flags & INTEGER_PACK_NEGATIVE) ? + ((sizeof(uint32_t) == SIZEOF_BDIGITS && u == 0) ? -2 : -1) : + ((u >> (sizeof(uint32_t) * CHAR_BIT - 1)) ? -1 : 1); + if (sign < 0) u = -(u | LSHIFTX((~(BDIGIT)0), sizeof(uint32_t) * CHAR_BIT)); + } + else + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + *dp = u; + return sign; + } +#endif +#if defined(HAVE_UINT64_T) && 8 <= SIZEOF_BDIGITS + if (wordsize == 8 && (uintptr_t)words % ALIGNOF(uint64_t) == 0) { + BDIGIT u = *(uint64_t *)buf; + if (need_swap) u = swap64(u); + if (flags & INTEGER_PACK_2COMP) { + sign = (flags & INTEGER_PACK_NEGATIVE) ? + ((sizeof(uint64_t) == SIZEOF_BDIGITS && u == 0) ? -2 : -1) : + ((u >> (sizeof(uint64_t) * CHAR_BIT - 1)) ? -1 : 1); + if (sign < 0) u = -(u | LSHIFTX((~(BDIGIT)0), sizeof(uint64_t) * CHAR_BIT)); + } + else + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + *dp = u; + return sign; + } +#endif + } +#if !defined(WORDS_BIGENDIAN) + if (nails == 0 && SIZEOF_BDIGITS == sizeof(BDIGIT) && + (flags & INTEGER_PACK_WORDORDER_MASK) == INTEGER_PACK_LSWORD_FIRST && + (flags & INTEGER_PACK_BYTEORDER_MASK) != INTEGER_PACK_MSBYTE_FIRST) { + size_t src_size = numwords * wordsize; + size_t dst_size = num_bdigits * SIZEOF_BDIGITS; + MEMCPY(dp, words, char, src_size); + if (flags & INTEGER_PACK_2COMP) { + if (flags & INTEGER_PACK_NEGATIVE) { + int zero_p; + memset((char*)dp + src_size, 0xff, dst_size - src_size); + zero_p = bary_2comp(dp, num_bdigits); + sign = zero_p ? -2 : -1; + } + else if (buf[src_size-1] >> (CHAR_BIT-1)) { + memset((char*)dp + src_size, 0xff, dst_size - src_size); + bary_2comp(dp, num_bdigits); + sign = -1; + } + else { + MEMZERO((char*)dp + src_size, char, dst_size - src_size); + sign = 1; + } + } + else { + MEMZERO((char*)dp + src_size, char, dst_size - src_size); + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + } + return sign; + } +#endif + if (nails == 0 && SIZEOF_BDIGITS == sizeof(BDIGIT) && + wordsize % SIZEOF_BDIGITS == 0) { + size_t bdigits_per_word = wordsize / SIZEOF_BDIGITS; + int mswordfirst_p = (flags & INTEGER_PACK_MSWORD_FIRST) != 0; + int msbytefirst_p = (flags & INTEGER_PACK_NATIVE_BYTE_ORDER) ? HOST_BIGENDIAN_P : + (flags & INTEGER_PACK_MSBYTE_FIRST) != 0; + MEMCPY(dp, words, BDIGIT, numwords*bdigits_per_word); + if (mswordfirst_p) { + BDIGIT *p1 = dp, *p2 = de - 1; + for (; p1 < p2; p1++, p2--) { + BDIGIT tmp = *p1; + *p1 = *p2; + *p2 = tmp; + } + } + if (mswordfirst_p ? !msbytefirst_p : msbytefirst_p) { + size_t i; + BDIGIT *p = dp; + for (i = 0; i < numwords; i++) { + BDIGIT *p1 = p, *p2 = p1 + bdigits_per_word - 1; + for (; p1 < p2; p1++, p2--) { + BDIGIT tmp = *p1; + *p1 = *p2; + *p2 = tmp; + } + p += bdigits_per_word; + } + } + if (msbytefirst_p != HOST_BIGENDIAN_P) { + BDIGIT *p; + for (p = dp; p < de; p++) { + BDIGIT d = *p; + *p = swap_bdigit(d); + } + } + if (flags & INTEGER_PACK_2COMP) { + if (flags & INTEGER_PACK_NEGATIVE) { + int zero_p = bary_2comp(dp, num_bdigits); + sign = zero_p ? -2 : -1; + } + else if (de[-1] >> (BITSPERDIG-1)) { + bary_2comp(dp, num_bdigits); + sign = -1; + } + else { + sign = 1; + } + } + else { + sign = (flags & INTEGER_PACK_NEGATIVE) ? -1 : 1; + } + return sign; + } + } + if (num_bdigits != 0) { int word_num_partialbits; size_t word_num_fullbytes; @@ -1476,9 +1630,6 @@ bary_unpack_internal(BDIGIT *bdigits, size_t num_bdigits, const void *words, siz BDIGIT_DBL dd; int numbits_in_dd; - dp = bdigits; - de = dp + num_bdigits; - integer_pack_loop_setup(numwords, wordsize, nails, flags, &word_num_fullbytes, &word_num_partialbits, &word_start, &word_step, &word_last, &byte_start, &byte_step); @@ -1568,7 +1719,8 @@ bary_unpack(BDIGIT *bdigits, size_t num_bdigits, const void *words, size_t numwo INTEGER_PACK_NATIVE_BYTE_ORDER| INTEGER_PACK_2COMP| INTEGER_PACK_FORCE_BIGNUM| - INTEGER_PACK_NEGATIVE); + INTEGER_PACK_NEGATIVE| + INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION); num_bdigits0 = integer_unpack_num_bdigits(numwords, wordsize, nails, &nlp_bits); @@ -1644,7 +1796,8 @@ rb_integer_unpack(const void *words, size_t numwords, size_t wordsize, size_t na INTEGER_PACK_NATIVE_BYTE_ORDER| INTEGER_PACK_2COMP| INTEGER_PACK_FORCE_BIGNUM| - INTEGER_PACK_NEGATIVE); + INTEGER_PACK_NEGATIVE| + INTEGER_PACK_FORCE_GENERIC_IMPLEMENTATION); num_bdigits = integer_unpack_num_bdigits(numwords, wordsize, nails, &nlp_bits); diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb index fddc69b792..e5fb358ce8 100644 --- a/test/-ext-/bignum/test_pack.rb +++ b/test/-ext-/bignum/test_pack.rb @@ -259,6 +259,27 @@ class TestBignum < Test::Unit::TestCase assert_equal(-0x8070605040302010, Integer.test_unpack("\x80\x70\x60\x50\x40\x30\x20\x10", 8, 1, 0, BIG_ENDIAN|NEGATIVE)) end + def test_unpack_orders + [MSWORD_FIRST, LSWORD_FIRST].each {|word_order| + [MSBYTE_FIRST, LSBYTE_FIRST, NATIVE_BYTE_ORDER].each {|byte_order| + 1.upto(16) {|wordsize| + 1.upto(20) {|numwords| + w = numwords*wordsize + ary = [] + 0.upto(w) {|i| + ary << ((i+1) % 256); + } + str = ary.pack("C*") + flags = word_order|byte_order + assert_equal(Integer.test_unpack(str, numwords, wordsize, 0, flags|GENERIC), + Integer.test_unpack(str, numwords, wordsize, 0, flags), + "Integer.test_unpack(#{str.dump}, #{numwords}, #{wordsize}, 0, #{'%#x' % flags})") + } + } + } + } + end + def test_unpack2comp_single_byte assert_equal(-128, Integer.test_unpack("\x80", 1, 1, 0, TWOCOMP|BIG_ENDIAN)) assert_equal( -2, Integer.test_unpack("\xFE", 1, 1, 0, TWOCOMP|BIG_ENDIAN)) @@ -292,8 +313,12 @@ class TestBignum < Test::Unit::TestCase def test_unpack2comp_negative_zero 0.upto(100) {|n| - assert_equal(-(256**n), Integer.test_unpack("\x00"*n, n, 1, 0, TWOCOMP|BIG_ENDIAN|NEGATIVE)) - assert_equal(-(256**n), Integer.test_unpack("\x00"*n, n, 1, 0, TWOCOMP|LITTLE_ENDIAN|NEGATIVE)) + str = "\x00"*n + flags = TWOCOMP|BIG_ENDIAN|NEGATIVE + assert_equal(-(256**n), Integer.test_unpack(str, n, 1, 0, flags)) + flags = TWOCOMP|LITTLE_ENDIAN|NEGATIVE + assert_equal(-(256**n), Integer.test_unpack(str, n, 1, 0, flags), + "Integer.test_unpack(#{str.dump}, #{n}, 1, 0, #{'%#x' % flags})") } end end |