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| author | Sverker Eriksson <[email protected]> | 2017-07-12 17:09:10 +0200 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2017-07-12 17:09:10 +0200 |
| commit | abc4fd372d476821448dfb949bea4e28ab82ac26 (patch) | |
| tree | 8691172836707b2e08343704350340e9c1872c23 /erts/emulator/test/big_SUITE_data | |
| parent | 6d4001de141a00b3bf37b8f7b24c5bde2b4f4015 (diff) | |
| download | otp-abc4fd372d476821448dfb949bea4e28ab82ac26.tar.gz otp-abc4fd372d476821448dfb949bea4e28ab82ac26.tar.bz2 otp-abc4fd372d476821448dfb949bea4e28ab82ac26.zip | |
erts: Fix bug in bxor of a big negative number
Wrong result for
(X bsl WS) bxor Y.
where
X is any negative integer
Y is any integer that does not require more words than X
WS is erlang:system_info(wordsize) or larger
Fix: The subtraction of 1 (for 2-complement conversion)
must be carried along all the way to the last words.
Diffstat (limited to 'erts/emulator/test/big_SUITE_data')
| -rw-r--r-- | erts/emulator/test/big_SUITE_data/borders.dat | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/erts/emulator/test/big_SUITE_data/borders.dat b/erts/emulator/test/big_SUITE_data/borders.dat index 52e4f35861..c38ff93383 100644 --- a/erts/emulator/test/big_SUITE_data/borders.dat +++ b/erts/emulator/test/big_SUITE_data/borders.dat @@ -1114,3 +1114,38 @@ 1 = 16#800000000000001 rem (-16#800000000000000). 0 = 16#FFFFFFFFFFFFFFF800000000 rem 16#FFFFFFFFFFFFFFF80. +% ERL-450 bxor of big negative 2-pow +-(1 bsl 8) bxor -1 = 16#ff. +-(1 bsl 16) bxor -1 = 16#ffff. +-(1 bsl 24) bxor -1 = 16#ffffff. +-(1 bsl 32) bxor -1 = 16#ffffffff. +-(1 bsl 40) bxor -1 = 16#ffffffffff. +-(1 bsl 48) bxor -1 = 16#ffffffffffff. +-(1 bsl 56) bxor -1 = 16#ffffffffffffff. +-(1 bsl 64) bxor -1 = 16#ffffffffffffffff. +-(1 bsl 72) bxor -1 = 16#ffffffffffffffffff. +-(1 bsl 80) bxor -1 = 16#ffffffffffffffffffff. +-(1 bsl 88) bxor -1 = 16#ffffffffffffffffffffff. +-(1 bsl 96) bxor -1 = 16#ffffffffffffffffffffffff. +-(1 bsl 104) bxor -1 = 16#ffffffffffffffffffffffffff. +-(1 bsl 112) bxor -1 = 16#ffffffffffffffffffffffffffff. +-(1 bsl 120) bxor -1 = 16#ffffffffffffffffffffffffffffff. +-(1 bsl 128) bxor -1 = 16#ffffffffffffffffffffffffffffffff. +-(1 bsl 136) bxor -1 = 16#ffffffffffffffffffffffffffffffffff. +-(1 bsl 8) bxor 1 = -16#ff. +-(1 bsl 16) bxor 1 = -16#ffff. +-(1 bsl 24) bxor 1 = -16#ffffff. +-(1 bsl 32) bxor 1 = -16#ffffffff. +-(1 bsl 40) bxor 1 = -16#ffffffffff. +-(1 bsl 48) bxor 1 = -16#ffffffffffff. +-(1 bsl 56) bxor 1 = -16#ffffffffffffff. +-(1 bsl 64) bxor 1 = -16#ffffffffffffffff. +-(1 bsl 72) bxor 1 = -16#ffffffffffffffffff. +-(1 bsl 80) bxor 1 = -16#ffffffffffffffffffff. +-(1 bsl 88) bxor 1 = -16#ffffffffffffffffffffff. +-(1 bsl 96) bxor 1 = -16#ffffffffffffffffffffffff. +-(1 bsl 104) bxor 1 = -16#ffffffffffffffffffffffffff. +-(1 bsl 112) bxor 1 = -16#ffffffffffffffffffffffffffff. +-(1 bsl 120) bxor 1 = -16#ffffffffffffffffffffffffffffff. +-(1 bsl 128) bxor 1 = -16#ffffffffffffffffffffffffffffffff. +-(1 bsl 136) bxor 1 = -16#ffffffffffffffffffffffffffffffffff. |