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Set errno for scalb errors (bug 6803, bug 6804).
This patch fixes the default mode of scalb to set errno (bugs 6803 and 6804). Previously, the _LIB_VERSION == _SVID_ mode would set errno but only in some relevant cases, and with various peculiarities (such as errno setting when an exact infinity or zero result arises with an argument to scalb being an infinity). This patch leaves this mode bug-compatible, while making the default mode set errno in accordance with normal practice (so an exact infinity from an infinite argument is not an error, and nor is an exact zero result). gen-libm-test.pl is taught new notation such as ERRNO_PLUS_OFLOW to facilitate writing the tests of errno setting for underflow / overflow in libm-test.inc. Note that bug 6803 also covers scalbn and scalbln, but this patch only addresses the scalb parts of that bug (along with the whole of bug 6804). Tested x86_64 and x86. [BZ #6803] [BZ #6804] * math/w_scalb.c (__scalb): For non-SVID mode, check result and set errno as appropriate. * math/w_scalbf.c (__scalbf): Likewise. * math/w_scalbl.c (__scalbl): Likewise. * math/gen-libm-test.pl (parse_args): Handle ERRNO_PLUS_OFLOW, ERRNO_MINUS_OFLOW, ERRNO_PLUS_UFLOW and ERRNO_MINUS_UFLOW. * math/libm-test.inc (scalb_test_data): Add errno expectations. Add more NaN tests.
This commit is contained in:
Joseph Myers
parent
54fa2475d3
commit
8795b4a443
11
ChangeLog
11
ChangeLog
@ -1,5 +1,16 @@
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2014-03-31 Joseph Myers <joseph@codesourcery.com>
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[BZ #6803]
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[BZ #6804]
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* math/w_scalb.c (__scalb): For non-SVID mode, check result and
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set errno as appropriate.
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* math/w_scalbf.c (__scalbf): Likewise.
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* math/w_scalbl.c (__scalbl): Likewise.
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* math/gen-libm-test.pl (parse_args): Handle ERRNO_PLUS_OFLOW,
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ERRNO_MINUS_OFLOW, ERRNO_PLUS_UFLOW and ERRNO_MINUS_UFLOW.
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* math/libm-test.inc (scalb_test_data): Add errno expectations.
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Add more NaN tests.
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[BZ #16349]
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* math/w_atan2.c: Include <errno.h>.
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(__atan2): Set errno for result underflowing to zero.
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10
NEWS
10
NEWS
@ -9,11 +9,11 @@ Version 2.20
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* The following bugs are resolved with this release:
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15347, 15804, 15894, 16002, 16198, 16284, 16348, 16349, 16357, 16362,
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16447, 16532, 16545, 16574, 16599, 16600, 16609, 16610, 16611, 16613,
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16623, 16632, 16634, 16639, 16642, 16648, 16649, 16670, 16674, 16677,
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16680, 16683, 16689, 16695, 16701, 16706, 16707, 16712, 16713, 16714,
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16731, 16743, 16758, 16759, 16760, 16770.
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6804, 15347, 15804, 15894, 16002, 16198, 16284, 16348, 16349, 16357,
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16362, 16447, 16532, 16545, 16574, 16599, 16600, 16609, 16610, 16611,
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16613, 16623, 16632, 16634, 16639, 16642, 16648, 16649, 16670, 16674,
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16677, 16680, 16683, 16689, 16695, 16701, 16706, 16707, 16712, 16713,
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16714, 16731, 16743, 16758, 16759, 16760, 16770.
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* Running the testsuite no longer terminates as soon as a test fails.
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Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
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@ -160,6 +160,8 @@ sub parse_args {
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my ($ignore_result_any, $ignore_result_all);
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my ($num_res, @args_res, @start_rm, $rm);
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my (@plus_oflow, @minus_oflow, @plus_uflow, @minus_uflow);
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my (@errno_plus_oflow, @errno_minus_oflow);
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my (@errno_plus_uflow, @errno_minus_uflow);
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($descr_args, $descr_res) = split /_/,$descr, 2;
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@ -258,6 +260,10 @@ sub parse_args {
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@minus_oflow = qw(minus_infty minus_infty -max_value -max_value);
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@plus_uflow = qw(plus_zero plus_zero plus_zero min_subnorm_value);
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@minus_uflow = qw(-min_subnorm_value minus_zero minus_zero minus_zero);
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@errno_plus_oflow = qw(0 ERRNO_ERANGE 0 ERRNO_ERANGE);
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@errno_minus_oflow = qw(ERRNO_ERANGE ERRNO_ERANGE 0 0);
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@errno_plus_uflow = qw(ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE 0);
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@errno_minus_uflow = qw(0 ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE);
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for ($rm = 0; $rm <= 3; $rm++) {
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$current_arg = $start_rm[$rm];
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$ignore_result_any = 0;
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@ -322,6 +328,10 @@ sub parse_args {
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$cline_res =~ s/minus_oflow/$minus_oflow[$rm]/g;
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$cline_res =~ s/plus_uflow/$plus_uflow[$rm]/g;
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$cline_res =~ s/minus_uflow/$minus_uflow[$rm]/g;
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$cline_res =~ s/ERRNO_PLUS_OFLOW/$errno_plus_oflow[$rm]/g;
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$cline_res =~ s/ERRNO_MINUS_OFLOW/$errno_minus_oflow[$rm]/g;
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$cline_res =~ s/ERRNO_PLUS_UFLOW/$errno_plus_uflow[$rm]/g;
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$cline_res =~ s/ERRNO_MINUS_UFLOW/$errno_minus_uflow[$rm]/g;
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$cline .= ", { $cline_res }";
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}
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print $file " $cline },\n";
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@ -9087,72 +9087,74 @@ round_test (void)
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static const struct test_ff_f_data scalb_test_data[] =
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{
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TEST_ff_f (scalb, 2.0, 0.5, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, 3.0, -2.5, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, 2.0, 0.5, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, 3.0, -2.5, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, 0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, 1, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, 0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 1, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 1, 0, 1),
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TEST_ff_f (scalb, -1, 0, -1),
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TEST_ff_f (scalb, 1, 0, 1, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, -1, 0, -1, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0, plus_infty, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, minus_zero, plus_infty, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, 0, plus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, minus_zero, plus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, 0, 2, 0),
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TEST_ff_f (scalb, minus_zero, -4, minus_zero),
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TEST_ff_f (scalb, 0, 0, 0),
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TEST_ff_f (scalb, minus_zero, 0, minus_zero),
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TEST_ff_f (scalb, 0, -1, 0),
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TEST_ff_f (scalb, minus_zero, -10, minus_zero),
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TEST_ff_f (scalb, 0, minus_infty, 0),
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TEST_ff_f (scalb, minus_zero, minus_infty, minus_zero),
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TEST_ff_f (scalb, 0, 2, 0, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_zero, -4, minus_zero, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0, 0, 0, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_zero, 0, minus_zero, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0, -1, 0, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_zero, -10, minus_zero, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0, minus_infty, 0, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_zero, minus_infty, minus_zero, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, -1, plus_infty),
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TEST_ff_f (scalb, minus_infty, -10, minus_infty),
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TEST_ff_f (scalb, plus_infty, 0, plus_infty),
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TEST_ff_f (scalb, minus_infty, 0, minus_infty),
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TEST_ff_f (scalb, plus_infty, 2, plus_infty),
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TEST_ff_f (scalb, minus_infty, 100, minus_infty),
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TEST_ff_f (scalb, plus_infty, -1, plus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_infty, -10, minus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, 0, plus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_infty, 0, minus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, 2, plus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_infty, 100, minus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0.1L, minus_infty, 0.0),
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TEST_ff_f (scalb, -0.1L, minus_infty, minus_zero),
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TEST_ff_f (scalb, 0.1L, minus_infty, 0.0, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, -0.1L, minus_infty, minus_zero, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 1, plus_infty, plus_infty),
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TEST_ff_f (scalb, -1, plus_infty, minus_infty),
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TEST_ff_f (scalb, plus_infty, plus_infty, plus_infty),
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TEST_ff_f (scalb, minus_infty, plus_infty, minus_infty),
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TEST_ff_f (scalb, 1, plus_infty, plus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, -1, plus_infty, minus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, plus_infty, plus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, minus_infty, plus_infty, minus_infty, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, minus_infty, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, minus_infty, minus_infty, qnan_value, INVALID_EXCEPTION),
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TEST_ff_f (scalb, plus_infty, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, minus_infty, minus_infty, qnan_value, INVALID_EXCEPTION|ERRNO_EDOM),
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TEST_ff_f (scalb, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, 1, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, qnan_value, 0, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, 0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, qnan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, plus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION),
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TEST_ff_f (scalb, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 1, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, qnan_value, 0.5, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0.5, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, qnan_value, 0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, 0, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, qnan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, plus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (scalb, max_value, max_value, plus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, max_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, 1, max_value, plus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, 1, -max_value, plus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, min_value, max_value, plus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, min_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, min_subnorm_value, max_value, plus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, min_subnorm_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -max_value, max_value, minus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -max_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -1, max_value, minus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -1, -max_value, minus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -min_value, max_value, minus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -min_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -min_subnorm_value, max_value, minus_oflow, OVERFLOW_EXCEPTION),
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TEST_ff_f (scalb, -min_subnorm_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION),
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TEST_ff_f (scalb, max_value, max_value, plus_oflow, OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
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TEST_ff_f (scalb, max_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
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TEST_ff_f (scalb, 1, max_value, plus_oflow, OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
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TEST_ff_f (scalb, 1, -max_value, plus_uflow, UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
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TEST_ff_f (scalb, min_value, max_value, plus_oflow, OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
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TEST_ff_f (scalb, min_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
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TEST_ff_f (scalb, min_subnorm_value, max_value, plus_oflow, OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
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TEST_ff_f (scalb, min_subnorm_value, -max_value, plus_uflow, UNDERFLOW_EXCEPTION|ERRNO_PLUS_UFLOW),
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TEST_ff_f (scalb, -max_value, max_value, minus_oflow, OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
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TEST_ff_f (scalb, -max_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
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TEST_ff_f (scalb, -1, max_value, minus_oflow, OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
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TEST_ff_f (scalb, -1, -max_value, minus_uflow, UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
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TEST_ff_f (scalb, -min_value, max_value, minus_oflow, OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
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TEST_ff_f (scalb, -min_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
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TEST_ff_f (scalb, -min_subnorm_value, max_value, minus_oflow, OVERFLOW_EXCEPTION|ERRNO_MINUS_OFLOW),
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TEST_ff_f (scalb, -min_subnorm_value, -max_value, minus_uflow, UNDERFLOW_EXCEPTION|ERRNO_MINUS_UFLOW),
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TEST_ff_f (scalb, 0.8L, 4, 12.8L),
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TEST_ff_f (scalb, -0.854375L, 5, -27.34L),
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TEST_ff_f (scalb, 0.8L, 4, 12.8L, ERRNO_UNCHANGED),
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TEST_ff_f (scalb, -0.854375L, 5, -27.34L, ERRNO_UNCHANGED),
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};
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static void
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@ -45,9 +45,33 @@ sysv_scalb (double x, double fn)
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double
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__scalb (double x, double fn)
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{
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return (__builtin_expect (_LIB_VERSION == _SVID_, 0)
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? sysv_scalb (x, fn)
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: __ieee754_scalb (x, fn));
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if (__glibc_unlikely (_LIB_VERSION == _SVID_))
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return sysv_scalb (x, fn);
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else
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{
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double z = __ieee754_scalb (x, fn);
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if (__glibc_unlikely (!__finite (z) || z == 0.0))
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{
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if (__isnan (z))
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{
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if (!__isnan (x) && !__isnan (fn))
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__set_errno (EDOM);
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}
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else if (__isinf_ns (z))
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{
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if (!__isinf_ns (x) && !__isinf_ns (fn))
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__set_errno (ERANGE);
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}
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else
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{
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/* z == 0. */
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if (x != 0.0 && !__isinf_ns (fn))
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__set_errno (ERANGE);
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}
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}
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return z;
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}
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}
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weak_alias (__scalb, scalb)
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#ifdef NO_LONG_DOUBLE
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@ -45,8 +45,32 @@ sysv_scalbf (float x, float fn)
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float
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__scalbf (float x, float fn)
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{
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return (__builtin_expect (_LIB_VERSION == _SVID_, 0)
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? sysv_scalbf (x, fn)
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: __ieee754_scalbf (x, fn));
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if (__glibc_unlikely (_LIB_VERSION == _SVID_))
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return sysv_scalbf (x, fn);
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else
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{
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float z = __ieee754_scalbf (x, fn);
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if (__glibc_unlikely (!__finitef (z) || z == 0.0f))
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{
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if (__isnanf (z))
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{
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if (!__isnanf (x) && !__isnanf (fn))
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__set_errno (EDOM);
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}
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else if (__isinf_nsf (z))
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{
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if (!__isinf_nsf (x) && !__isinf_nsf (fn))
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__set_errno (ERANGE);
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}
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else
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{
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/* z == 0. */
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if (x != 0.0f && !__isinf_nsf (fn))
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__set_errno (ERANGE);
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}
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}
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return z;
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}
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}
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weak_alias (__scalbf, scalbf)
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@ -45,8 +45,32 @@ sysv_scalbl (long double x, long double fn)
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long double
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__scalbl (long double x, long double fn)
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{
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return (__builtin_expect (_LIB_VERSION == _SVID_, 0)
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? sysv_scalbl (x, fn)
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: __ieee754_scalbl (x, fn));
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if (__glibc_unlikely (_LIB_VERSION == _SVID_))
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return sysv_scalbl (x, fn);
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else
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{
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long double z = __ieee754_scalbl (x, fn);
|
||||
|
||||
if (__glibc_unlikely (!__finitel (z) || z == 0.0L))
|
||||
{
|
||||
if (__isnanl (z))
|
||||
{
|
||||
if (!__isnanl (x) && !__isnanl (fn))
|
||||
__set_errno (EDOM);
|
||||
}
|
||||
else if (__isinf_nsl (z))
|
||||
{
|
||||
if (!__isinf_nsl (x) && !__isinf_nsl (fn))
|
||||
__set_errno (ERANGE);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* z == 0. */
|
||||
if (x != 0.0L && !__isinf_nsl (fn))
|
||||
__set_errno (ERANGE);
|
||||
}
|
||||
}
|
||||
return z;
|
||||
}
|
||||
}
|
||||
weak_alias (__scalbl, scalbl)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user