AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-08 14:20:07 +00:00
Code Issues Packages Projects Releases Wiki Activity
5f245f3bfb
glibc/math/libm-test-llround.inc

301 lines
17 KiB
PHP
Raw Blame History

/* Test llround.
Copyright (C) 1997-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "libm-test-driver.c"
static const struct test_f_L_data llround_test_data[] =
{
/* Bug 6797: errno setting may be missing. */
TEST_f_L (llround, plus_infty, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, minus_infty, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, qnan_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -qnan_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, snan_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -snan_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, max_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -max_value, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, 0x1p31, 0x80000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x1p32, 0x100000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x1p33, 0x200000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x1p63, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, 0x1p64, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, 0x1p65, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -0x1p31, -0x80000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1p32, -0x100000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1p33, -0x200000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1p63, LLONG_MIN, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1p64, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -0x1p65, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, 0x7fffff80p0, 0x7fffff80LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if !TEST_COND_binary32
TEST_f_L (llround, 0x7fffffffp0, 0x7fffffffLL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffff.4p0, 0x7fffffffLL, ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffff.7ffffcp0, 0x7fffffffLL, ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffff.8p0, 0x80000000LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffff.cp0, 0x80000000LL, ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 64
TEST_f_L (llround, 0x7fffffff.7fffffff8p0L, 0x7fffffffLL, ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 106
TEST_f_L (llround, 0x7fffffff.7fffffffffffffffffep0L, 0x7fffffffLL, ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 113
TEST_f_L (llround, 0x7fffffff.7fffffffffffffffffffcp0L, 0x7fffffffLL, ERRNO_UNCHANGED),
#endif
#if !TEST_COND_binary32
TEST_f_L (llround, -0x80000000.4p0, -0x80000000LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x80000000.7ffff8p0, -0x80000000LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x80000000.8p0, -0x80000001LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x80000000.cp0, -0x80000001LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x80000001p0, -0x80000001LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
TEST_f_L (llround, -0x80000100p0, -0x80000100LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if MANT_DIG >= 64
TEST_f_L (llround, -0x80000000.7fffffffp0L, -0x80000000LL, ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 106
TEST_f_L (llround, -0x80000000.7fffffffffffffffffcp0L, -0x80000000LL, ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 113
TEST_f_L (llround, -0x80000000.7fffffffffffffffffff8p0L, -0x80000000LL, ERRNO_UNCHANGED),
#endif
TEST_f_L (llround, 0x7fffff8000000000p0, 0x7fffff8000000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if !TEST_COND_binary32
TEST_f_L (llround, 0x7ffffffffffffc00p0, 0x7ffffffffffffc00LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
#if MANT_DIG >= 64
TEST_f_L (llround, 0x7fffffffffffffffp0L, 0x7fffffffffffffffLL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffffffffffff.8p0L, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
# if MANT_DIG > 64
TEST_f_L (llround, 0x7fffffffffffffff.4p0L, 0x7fffffffffffffffLL, ERRNO_UNCHANGED),
TEST_f_L (llround, 0x7fffffffffffffff.cp0L, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
# endif
# if MANT_DIG >= 106
TEST_f_L (llround, 0x7fffffffffffffff.7fffffffffep0L, 0x7fffffffffffffffLL, ERRNO_UNCHANGED),
# endif
# if MANT_DIG >= 113
TEST_f_L (llround, 0x7fffffffffffffff.7fffffffffffcp0L, 0x7fffffffffffffffLL, ERRNO_UNCHANGED),
# endif
#endif
#if MANT_DIG >= 64
TEST_f_L (llround, -0x8000000000000001p0L, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
#endif
#if MANT_DIG >= 106
TEST_f_L (llround, -0x8000000000000000.4p0L, LLONG_MIN, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x8000000000000000.7fffffffffcp0L, LLONG_MIN, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x8000000000000000.8p0L, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
TEST_f_L (llround, -0x8000000000000000.cp0L, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
#endif
TEST_f_L (llround, -0x8000010000000000p0, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
#if !TEST_COND_binary32
TEST_f_L (llround, -0x8000000000000800p0, IGNORE, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
#endif
#if MANT_DIG >= 113
TEST_f_L (llround, -0x8000000000000000.7fffffffffff8p0L, LLONG_MIN, ERRNO_UNCHANGED),
#endif
TEST_f_L (llround, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, minus_zero, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, min_value, 0.0, ERRNO_UNCHANGED),
TEST_f_L (llround, -min_value, 0, ERRNO_UNCHANGED),
TEST_f_L (llround, min_subnorm_value, 0.0, ERRNO_UNCHANGED),
TEST_f_L (llround, -min_subnorm_value, 0, ERRNO_UNCHANGED),
TEST_f_L (llround, 0.2L, 0.0, ERRNO_UNCHANGED),
TEST_f_L (llround, -0.2L, 0, ERRNO_UNCHANGED),
TEST_f_L (llround, 0.5, 1, ERRNO_UNCHANGED),
TEST_f_L (llround, -0.5, -1, ERRNO_UNCHANGED),
TEST_f_L (llround, 0.8L, 1, ERRNO_UNCHANGED),
TEST_f_L (llround, -0.8L, -1, ERRNO_UNCHANGED),
TEST_f_L (llround, 1.5, 2, ERRNO_UNCHANGED),
TEST_f_L (llround, -1.5, -2, ERRNO_UNCHANGED),
TEST_f_L (llround, 22514.5, 22515, ERRNO_UNCHANGED),
TEST_f_L (llround, -22514.5, -22515, ERRNO_UNCHANGED),
TEST_f_L (llround, 1071930.0008, 1071930, ERRNO_UNCHANGED),
TEST_f_L (llround, 2097152.5, 2097153, ERRNO_UNCHANGED),
TEST_f_L (llround, -2097152.5, -2097153, ERRNO_UNCHANGED),
#if !TEST_COND_binary32
TEST_f_L (llround, 1073741824.01, 1073741824, ERRNO_UNCHANGED),
TEST_f_L (llround, 34359738368.5, 34359738369ll, ERRNO_UNCHANGED),
TEST_f_L (llround, -34359738368.5, -34359738369ll, ERRNO_UNCHANGED),
TEST_f_L (llround, -3.65309740835E17, -365309740835000000LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 281474976710656.025, 281474976710656, ERRNO_UNCHANGED),
TEST_f_L (llround, 18014398509481974, 18014398509481974, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
/* Test boundary conditions. */
/* 0x1FFFFF */
TEST_f_L (llround, 2097151.0, 2097151LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x800000 */
TEST_f_L (llround, 8388608.0, 8388608LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x1000000 */
TEST_f_L (llround, 16777216.0, 16777216LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x20000000000 */
TEST_f_L (llround, 2199023255552.0, 2199023255552LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x40000000000 */
TEST_f_L (llround, 4398046511104.0, 4398046511104LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x1000000000000 */
TEST_f_L (llround, 281474976710656.0, 281474976710656LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x10000000000000 */
TEST_f_L (llround, 4503599627370496.0, 4503599627370496LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x10000080000000 */
TEST_f_L (llround, 4503601774854144.0, 4503601774854144LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x20000000000000 */
TEST_f_L (llround, 9007199254740992.0, 9007199254740992LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x80000000000000 */
TEST_f_L (llround, 36028797018963968.0, 36028797018963968LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* 0x100000000000000 */
TEST_f_L (llround, 72057594037927936.0, 72057594037927936LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if !TEST_COND_binary32
/* 0x100000000 */
TEST_f_L (llround, 4294967295.5, 4294967296LL, ERRNO_UNCHANGED),
/* 0x200000000 */
TEST_f_L (llround, 8589934591.5, 8589934592LL, ERRNO_UNCHANGED),
/* nextafter(0.5,-1) */
TEST_f_L (llround, 0x1.fffffffffffffp-2, 0, ERRNO_UNCHANGED),
/* nextafter(-0.5,1) */
TEST_f_L (llround, -0x1.fffffffffffffp-2, 0, ERRNO_UNCHANGED),
/* On PowerPC an exponent of '52' is the largest incrementally
* representable sequence of whole-numbers in the 'double' range. We test
* lround to make sure that a guard bit set during the lround operation
* hasn't forced an erroneous shift giving us an incorrect result. The odd
* numbers between +-(2^52+1 and 2^53-1) are affected since they have the
* rightmost bit set. */
/* +-(2^52+1) */
TEST_f_L (llround, 0x1.0000000000001p+52, 4503599627370497LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.0000000000001p+52, -4503599627370497LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* +-(2^53-1): Input is the last (positive and negative) incrementally
* representable whole-number in the 'double' range that might round
* erroneously. */
TEST_f_L (llround, 0x1.fffffffffffffp+52, 9007199254740991LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.fffffffffffffp+52, -9007199254740991LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
TEST_f_L (llround, 0x1.fffffp-2, 0, ERRNO_UNCHANGED),
/* nextafter(0.5,-1) */
TEST_f_L (llround, 0x1.fffffep-2, 0, ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.fffffp-2, 0, ERRNO_UNCHANGED),
/* nextafter(-0.5,1) */
TEST_f_L (llround, -0x1.fffffep-2, 0, ERRNO_UNCHANGED),
TEST_f_L (llround, 0x1.fffffep+23, 16777215, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.fffffep+23, -16777215, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
/* As above, on PowerPC an exponent of '23' is the largest incrementally
* representable sequence of whole-numbers in the 'float' range.
* Likewise, numbers between +-(2^23+1 and 2^24-1) are affected. */
TEST_f_L (llround, 0x1.000002p+23, 8388609, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.000002p+23, -8388609, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, 0x1.fffffep+23, 16777215, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -0x1.fffffep+23, -16777215, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#if MANT_DIG >= 64
/* The input can only be represented in long double. */
TEST_f_L (llround, 4503599627370495.5L, 4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370496.25L, 4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370496.5L, 4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370496.75L, 4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370497.5L, 4503599627370498LL, ERRNO_UNCHANGED),
# if MANT_DIG > 100
TEST_f_L (llround, 4503599627370495.4999999999999L, 4503599627370495LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370496.4999999999999L, 4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370497.4999999999999L, 4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370494.5000000000001L, 4503599627370495LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370495.5000000000001L, 4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 4503599627370496.5000000000001L, 4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370495.4999999999999L, -4503599627370495LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370496.4999999999999L, -4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370497.4999999999999L, -4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370494.5000000000001L, -4503599627370495LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370495.5000000000001L, -4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370496.5000000000001L, -4503599627370497LL, ERRNO_UNCHANGED),
# endif
TEST_f_L (llround, -4503599627370495.5L, -4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370496.25L, -4503599627370496LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370496.5L, -4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370496.75L, -4503599627370497LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -4503599627370497.5L, -4503599627370498LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740991.5L, 9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740992.25L, 9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740992.5L, 9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740992.75L, 9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740993.5L, 9007199254740994LL, ERRNO_UNCHANGED),
# if MANT_DIG > 100
TEST_f_L (llround, 9007199254740991.4999999999999L, 9007199254740991LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740992.4999999999999L, 9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740993.4999999999999L, 9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740991.5000000000001L, 9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740992.5000000000001L, 9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9007199254740993.5000000000001L, 9007199254740994LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740991.4999999999999L, -9007199254740991LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740992.4999999999999L, -9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740993.4999999999999L, -9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740991.5000000000001L, -9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740992.5000000000001L, -9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740993.5000000000001L, -9007199254740994LL, ERRNO_UNCHANGED),
# endif
TEST_f_L (llround, -9007199254740991.5L, -9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740992.25L, -9007199254740992LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740992.5L, -9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740992.75L, -9007199254740993LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9007199254740993.5L, -9007199254740994LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 72057594037927935.5L, 72057594037927936LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 72057594037927936.25L, 72057594037927936LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 72057594037927936.5L, 72057594037927937LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 72057594037927936.75L, 72057594037927937LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 72057594037927937.5L, 72057594037927938LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -72057594037927935.5L, -72057594037927936LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -72057594037927936.25L, -72057594037927936LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -72057594037927936.5L, -72057594037927937LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -72057594037927936.75L, -72057594037927937LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -72057594037927937.5L, -72057594037927938LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9223372036854775806.25L, 9223372036854775806LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9223372036854775806.25L, -9223372036854775806LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9223372036854775806.5L, 9223372036854775807LL, ERRNO_UNCHANGED),
TEST_f_L (llround, -9223372036854775806.5L, -9223372036854775807LL, ERRNO_UNCHANGED),
TEST_f_L (llround, 9223372036854775807.0L, 9223372036854775807LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
TEST_f_L (llround, -9223372036854775807.0L, -9223372036854775807LL, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
#endif
};
static void
llround_test (void)
{
ALL_RM_TEST (llround, 1, llround_test_data, RUN_TEST_LOOP_f_L, END);
}
static void
do_test (void)
{
llround_test ();
}
/*
* Local Variables:
* mode:c
* End:
*/
Reference in New Issue View Git Blame Copy Permalink