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binutils-gdb/gdb/testsuite/gdb.base/dfp-exprs.exp
Ulrich Weigand 3b4b2f160d Clean up some DFP interfaces 
This cleans up a number of interfaces in dfp.c / dfp.h.  Specifically:

- The decimal_from_string / decimal_to_string routines are C++-ified
  to operate on std::string instead of character buffers.  In the
  decimal_from_string, the boolean return value now actually is bool
  instead of an int.

- The decimal_from_integral and decimal_from_doublest routines take
  an struct value as input.  This is not really appropriate at the low
  level the DFP routines sit, so this replaced them with new routines
  decimal_from_longest / decimal_from_ulongest / decimal_from_doublest
  that operate on contents instead.

- To mirror the decimal_from_[u]longest, a new decimal_to_longest
  routine is added as well, which can be used in unpack_long to
  avoid an unnecessary conversion via DOUBLEST.

Note that the decimal_from_longest / decimal_from_ulongest routines
are actually more powerful than decimal_from_integral: the old routine
would only accept integer *types* of at most four bytes size, while
the new routines accept all integer *values* that fit in an [u]int32_t,
no matter which type they came from.  The DFP tests are updated to
allow for this larger range of integers that can be converted.

gdb/ChangeLog:
2017-10-05  Ulrich Weigand  <uweigand@de.ibm.com>

	* dfp.h (MAX_DECIMAL_STRING): Move to dfp.c.
	(decimal_to_string): Return std::string object.
	(decimal_from_string): Accept std::string object.  Return bool.
	(decimal_from_integral, decimal_from_doublest): Remove.
	(decimal_from_longest): Add prototype.
	(decimal_from_ulongest): Likewise.
	(decimal_to_longest): Likewise.
	(decimal_from_doublest): Likewise.
	* dfp.c: Do not include "gdbtypes.h" or "value.h".
	(MAX_DECIMAL_STRING): Move here.
	(decimal_to_string): Return std::string object.
	(decimal_from_string): Accept std::string object.  Return bool.
	(decimal_from_integral): Remove, replace by ...
	(decimal_from_longest, decimal_from_ulongest): ... these new functions.
	(decimal_to_longest): New function.
	(decimal_from_floating): Remove, replace by ...
	(decimal_from_doublest): ... this new function.
	(decimal_to_doublest): Update to new decimal_to_string interface.

	* value.c (unpack_long): Use decimal_to_longest.
	* valops.c (value_cast): Use decimal_from_doublest instead of
	decimal_from_floating.  Use decimal_from_[u]longest isntead of
	decimal_from_integral.
	* valarith.c (value_args_as_decimal): Likewise.
	* valprint.c (print_decimal_floating): Update to new
	decimal_to_string interface.
	* printcmd.c (printf_decfloat): Likewise.
	* c-exp.y (parse_number): Update to new decimal_from_string interface.

gdb/testsuite/ChangeLog:
2017-10-05  Ulrich Weigand  <uweigand@de.ibm.com>

	* gdb.base/dfp-exprs.exp: Update tests to larger range of supported
	integer-to-dfp conversion.
	* gdb.base/dfp-test.exp: Likewise.
2017-10-05 19:14:08 +02:00

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# Copyright (C) 2007-2017 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file was written by Wu Zhou. (woodzltc@cn.ibm.com)
# This file is part of the gdb testsuite. It contains test for evaluating
# simple decimal floating point (DFP) expression.
proc test_dfp_literals_accepted {} {
# Test various dfp values, covering 32-bit, 64-bit and 128-bit ones
# _Decimal32 constants, which can support up to 7 digits
gdb_test "p 1.2df" " = 1.2"
gdb_test "p -1.2df" " = -1.2"
gdb_test "p 1.234567df" " = 1.234567"
gdb_test "p -1.234567df" " = -1.234567"
gdb_test "p 1234567.df" " = 1234567"
gdb_test "p -1234567.df" " = -1234567"
gdb_test "p 1.2E1df" " = 12"
gdb_test "p 1.2E10df" " = 1.2E\\+10"
gdb_test "p 1.2E-10df" " = 1.2E-10"
# The largest exponent for 32-bit dfp value is 96.
gdb_test "p 1.2E96df" " = 1.200000E\\+96"
# _Decimal64 constants, which can support up to 16 digits
gdb_test "p 1.2dd" " = 1.2"
gdb_test "p -1.2dd" " = -1.2"
gdb_test "p 1.234567890123456dd" " = 1.234567890123456"
gdb_test "p -1.234567890123456dd" " = -1.234567890123456"
gdb_test "p 1234567890123456.dd" " = 1234567890123456"
gdb_test "p -1234567890123456.dd" " = -1234567890123456"
gdb_test "p 1.2E1dd" " = 12"
gdb_test "p 1.2E10dd" " = 1.2E\\+10"
gdb_test "p 1.2E-10dd" " = 1.2E-10"
# The largest exponent for 64-bit dfp value is 384.
gdb_test "p 1.2E384dd" " = 1.200000000000000E\\+384"
# _Decimal128 constants, which can support up to 34 digits
gdb_test "p 1.2dl" " = 1.2"
gdb_test "p -1.2dl" " = -1.2"
gdb_test "p 1.234567890123456789012345678901234dl" " = 1.234567890123456789012345678901234"
gdb_test "p -1.234567890123456789012345678901234dl" " = -1.234567890123456789012345678901234"
gdb_test "p 1234567890123456789012345678901234.dl" " = 1234567890123456789012345678901234"
gdb_test "p -1234567890123456789012345678901234.dl" " = -1234567890123456789012345678901234"
gdb_test "p 1.2E1dl" " = 12"
gdb_test "p 1.2E10dl" " = 1.2E\\+10"
gdb_test "p 1.2E-10dl" " = 1.2E-10"
# The largest exponent for 128-bit dfp value is 6144.
gdb_test "p 1.2E6144dl" " = 1.200000000000000000000000000000000E\\+6144"
}
proc test_dfp_arithmetic_expressions {} {
# _Decimal32 operands.
gdb_test "p 1.4df + 1.2df" " = 2.6"
gdb_test "p 1.4df - 1.2df" " = 0.2"
gdb_test "p 1.4df * 1.2df" " = 1.68"
gdb_test "p 1.4df / 1.2df" " = 1.166667"
# _Decimal64 operands.
gdb_test "p 1.4dd + 1.2dd" " = 2.6"
gdb_test "p 1.4dd - 1.2dd" " = 0.2"
gdb_test "p 1.4dd * 1.2dd" " = 1.68"
gdb_test "p 1.4dd / 1.2dd" " = 1.166666666666667"
# _Decimal128 operands.
gdb_test "p 1.4dl + 1.2dl" " = 2.6"
gdb_test "p 1.4dl - 1.2dl" " = 0.2"
gdb_test "p 1.4dl * 1.2dl" " = 1.68"
gdb_test "p 1.4dl / 1.2dl" " = 1.166666666666666666666666666666667"
# Test type of operation result.
gdb_test "ptype 2.df + 2.df" "= _Decimal32"
gdb_test "ptype 2.dd + 2.dd" "= _Decimal64"
gdb_test "ptype 2.dl + 2.dl" "= _Decimal128"
# Mixture of different _Decimal sizes.
gdb_test "p 2.1df + 2.7dd" "= 4.8"
gdb_test "p 2.1dd + 2.7df" "= 4.8"
gdb_test "p 2.6df + 2.7dl" "= 5.3"
gdb_test "p 2.6dl + 2.7df" "= 5.3"
gdb_test "p 2.3dd + 2.2dl" "= 4.5"
gdb_test "p 2.3dl + 2.2dd" "= 4.5"
gdb_test "ptype 2.df + 2.dd" "= _Decimal64"
gdb_test "ptype 2.df + 2.dl" "= _Decimal128"
gdb_test "ptype 2.dd + 2.dl" "= _Decimal128"
# Mixture of Decimal and integral operands
gdb_test "p 1.2df + 1" " = 2.2"
gdb_test "p 2 + 1.7dd" " = 3.7"
gdb_test "p 3 + 2.1dl" " = 5.1"
gdb_test "ptype 1.2df + 1" " = _Decimal32"
gdb_test "ptype 2 + 1.7dd" " = _Decimal64"
gdb_test "ptype 3 + 2.1dl" " = _Decimal128"
# Reject operation with integral larger than 32-bits
gdb_test "p 1.2dd + 2ll" "= 3.2"
gdb_test "p 1.2dd + 2147483648ll" "Conversion of large integer to a decimal floating type is not supported."
gdb_test "p 1.2dd + 2147483648ull" "= 2147483649.2"
gdb_test "p 1.2dd + 4294967296ull" "Conversion of large integer to a decimal floating type is not supported."
# Reject operation with DFP and Binary FP
gdb_test "p 1.2df + 1.2f" "Mixing decimal floating types with other floating types is not allowed."
# Test other operations with DFP operands
gdb_test "p !0.df" " = 1"
gdb_test "p !0.dd" " = 1"
gdb_test "p !0.dl" " = 1"
gdb_test "p !0.5df" " = 0"
gdb_test "p !0.5dd" " = 0"
gdb_test "p !0.5dl" " = 0"
gdb_test "p 1.2df == 1.2df" " = 1"
gdb_test "p 1.2df == 1.2dd" " = 1"
gdb_test "p 1.2df == 1.2dl" " = 1"
gdb_test "p 1.2dd == 1.2df" " = 1"
gdb_test "p 1.2dd == 1.2dl" " = 1"
gdb_test "p 1.2dl == 1.2df" " = 1"
gdb_test "p 1.2dl == 1.2dd" " = 1"
gdb_test "p 1.2df == 1.3df" " = 0"
gdb_test "p 1.2df == 1.3dd" " = 0"
gdb_test "p 1.2df == 1.3dl" " = 0"
gdb_test "p 1.2dd == 1.3df" " = 0"
gdb_test "p 1.2dd == 1.3dl" " = 0"
gdb_test "p 1.2dl == 1.3df" " = 0"
gdb_test "p 1.2dl == 1.3dd" " = 0"
gdb_test "p +1.2df" " = 1.2"
gdb_test "p +1.2dd" " = 1.2"
gdb_test "p +1.2dl" " = 1.2"
gdb_test "p 1.2df < 1.3df" " = 1"
gdb_test "p 1.2df < 1.3dd" " = 1"
gdb_test "p 1.2dl < 1.3df" " = 1"
gdb_test "p 1.2dd < 1.3dd" " = 1"
gdb_test "p 1.2dd < 1.3dl" " = 1"
gdb_test "p 1.2dl < 1.3dl" " = 1"
gdb_test "p 1.2dl < 1.3df" " = 1"
gdb_test "p 1.2df > 1" " = 1"
gdb_test "p 1.2dl > 2" " = 0"
gdb_test "p 2 > 1.2dd" " = 1"
gdb_test "p 2 > 3.1dl" " = 0"
}
proc test_dfp_conversions {} {
# Test cast to and from DFP values, and between DFPs of different sizes
gdb_test "p (float) -0.1df" " = -0.(0999.*|1000.*)"
gdb_test "p (int) 8.3dd" " = 8"
gdb_test "p (_Decimal64) 3.1" " = 3.(0999.*|1000.*)"
gdb_test "p (_Decimal128) 3.7df" " = 3.7"
gdb_test "p (_Decimal32) 4" " = 4"
}
# Start with a fresh gdb.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
test_dfp_literals_accepted
test_dfp_arithmetic_expressions
test_dfp_conversions
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