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glibc/math/libm-test-support.h
Joseph Myers 2813e41e90 Replace gen-libm-test.pl with gen-libm-test.py. 
Following the recent discussion of using Python instead of Perl and
Awk for glibc build / test, this patch replaces gen-libm-test.pl with
a new gen-libm-test.py script.  This script should work with all
Python versions supported by glibc (tested by hand with Python 2.7,
tested in the build system with Python 3.5; configure prefers Python 3
if available).

This script is designed to give identical output to gen-libm-test.pl
for ease of verification of the change, except for generated comments
referring to .py instead of .pl.  (That is, identical for actual
inputs passed to the script, not necessarily for all possible input;
for example, this version more precisely follows the C standard syntax
for floating-point constants when deciding when to add LIT macro
calls.)  In one place a comment notes that the generation of
NON_FINITE flags is replicating a bug in the Perl script to assist in
such comparisons (with the expectation that this bug can then be
separately fixed in the Python script later).

Tested for x86_64, including comparison of generated files (and hand
testing of the case of generating a sorted libm-test-ulps file, which
isn't covered by normal "make check").

I'd expect to follow this up by extending the new script to produce
the ulps tables for the manual as well (replacing
manual/libm-err-tab.pl, so that then we just have one ulps file
parser) - at which point the manual build would depend on both Perl
and Python (eliminating the Perl dependency would require someone to
rewrite summary.pl in Python, and that would only eliminate the
*direct* Perl dependency; current makeinfo is written in Perl so there
would still be an indirect dependency).

I think install.texi is more or less equally out-of-date regarding
Perl and Python uses before and after this patch, so I don't think
this patch depends on my patch
<https://sourceware.org/ml/libc-alpha/2018-08/msg00133.html> to update
install.texi regarding such uses (pending review).

	* math/gen-libm-test.py: New file.
	* math/gen-libm-test.pl: Remove.
	* math/Makefile [$(PERL) != no]: Change condition to [PYTHON].
	($(objpfx)libm-test-ulps.h): Use gen-libm-test.py instead of
	gen-libm-test.pl.
	($(libm-test-c-noauto-obj)): Likewise.
	($(libm-test-c-auto-obj)): Likewise.
	($(libm-test-c-narrow-obj)): Likewise.
	(regen-ulps): Likewise.
	* math/README.libm-test: Update references to gen-libm-test.pl.
	* math/libm-test-driver.c (struct test_fj_f_data): Update comment
	referencing gen-libm-test.pl.
	* math/libm-test-nexttoward.inc (nexttoward_test_data): Likewise.
	* math/libm-test-support.c: Likewise.
	* math/libm-test-support.h: Likewise.
	* sysdeps/generic/libm-test-ulps: Likewise.
2018-08-09 15:34:12 +00:00

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/* Support code for testing libm functions (common declarations).
Copyright (C) 1997-2018 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
<http://www.gnu.org/licenses/>. */
#ifndef LIBM_TEST_SUPPORT_H
#define LIBM_TEST_SUPPORT_H 1
#include <complex.h>
#include <math.h>
#include <float.h>
#include <fenv.h>
#include <limits.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <tininess.h>
#include <math-tests.h>
#include <nan-high-order-bit.h>
extern const int flag_test_errno;
extern const int flag_test_exceptions;
extern const int flag_test_finite;
extern const int flag_test_inline;
extern const int flag_test_mathvec;
extern const int snan_tests_arg;
extern const char test_msg[];
extern const char qtype_str[];
extern const char doc[];
/* Possible exceptions */
#define NO_EXCEPTION 0x0
#define INVALID_EXCEPTION 0x1
#define DIVIDE_BY_ZERO_EXCEPTION 0x2
#define OVERFLOW_EXCEPTION 0x4
#define UNDERFLOW_EXCEPTION 0x8
#define INEXACT_EXCEPTION 0x10
/* The next flags signals that those exceptions are allowed but not required. */
#define INVALID_EXCEPTION_OK 0x20
#define DIVIDE_BY_ZERO_EXCEPTION_OK 0x40
#define OVERFLOW_EXCEPTION_OK 0x80
#define UNDERFLOW_EXCEPTION_OK 0x100
/* For "inexact" exceptions, the default is allowed but not required
unless INEXACT_EXCEPTION or NO_INEXACT_EXCEPTION is specified. */
#define NO_INEXACT_EXCEPTION 0x200
/* Some special test flags, passed together with exceptions. */
#define IGNORE_ZERO_INF_SIGN 0x400
#define TEST_NAN_SIGN 0x800
#define TEST_NAN_PAYLOAD 0x1000
#define NO_TEST_INLINE 0x2000
#define XFAIL_TEST 0x4000
/* Indicate errno settings required or disallowed. */
#define ERRNO_UNCHANGED 0x8000
#define ERRNO_EDOM 0x10000
#define ERRNO_ERANGE 0x20000
/* Flags generated by gen-libm-test.py, not entered here manually. */
#define IGNORE_RESULT 0x40000
#define NON_FINITE 0x80000
#define TEST_SNAN 0x100000
#define NO_TEST_MATHVEC 0x200000
#define __CONCATX(a,b) __CONCAT(a,b)
#define TYPE_MIN __CONCATX (PREFIX, _MIN)
#define TYPE_TRUE_MIN __CONCATX (PREFIX, _TRUE_MIN)
#define TYPE_MAX __CONCATX (PREFIX, _MAX)
#define MIN_EXP __CONCATX (PREFIX, _MIN_EXP)
#define MAX_EXP __CONCATX (PREFIX, _MAX_EXP)
#define MANT_DIG __CONCATX (PREFIX, _MANT_DIG)
#define ARG_TYPE_MIN __CONCATX (ARG_PREFIX, _MIN)
#define ARG_TYPE_TRUE_MIN __CONCATX (ARG_PREFIX, _TRUE_MIN)
#define ARG_TYPE_MAX __CONCATX (ARG_PREFIX, _MAX)
#define ARG_MIN_EXP __CONCATX (ARG_PREFIX, _MIN_EXP)
#define ARG_MAX_EXP __CONCATX (ARG_PREFIX, _MAX_EXP)
#define ARG_MANT_DIG __CONCATX (ARG_PREFIX, _MANT_DIG)
/* Format specific test macros. */
#define TEST_COND_binary32 (MANT_DIG == 24 \
&& MIN_EXP == -125 \
&& MAX_EXP == 128)
#define TEST_COND_binary64 (MANT_DIG == 53 \
&& MIN_EXP == -1021 \
&& MAX_EXP == 1024)
#define TEST_COND_binary128 (MANT_DIG == 113 \
&& MIN_EXP == -16381 \
&& MAX_EXP == 16384)
#define TEST_COND_ibm128 (MANT_DIG == 106)
#define TEST_COND_arg_ibm128 (ARG_MANT_DIG == 106)
#define TEST_COND_intel96 (MANT_DIG == 64 \
&& MIN_EXP == -16381 \
&& MAX_EXP == 16384)
#define TEST_COND_m68k96 (MANT_DIG == 64 \
&& MIN_EXP == -16382 \
&& MAX_EXP == 16384)
/* The condition ibm128-libgcc is used instead of ibm128 to mark tests
where in principle the glibc code is OK but the tests fail because
of limitations of the libgcc support for that format (e.g. GCC bug
59666, in non-default rounding modes). */
#ifdef ARG_FLOAT
# define TEST_COND_ibm128_libgcc (TEST_COND_ibm128 || TEST_COND_arg_ibm128)
#else
# define TEST_COND_ibm128_libgcc TEST_COND_ibm128
#endif
/* Mark a test as expected to fail for ibm128-libgcc. This is used
via XFAIL_ROUNDING_IBM128_LIBGCC, which gen-libm-test.py transforms
appropriately for each rounding mode. */
#define XFAIL_IBM128_LIBGCC (TEST_COND_ibm128_libgcc ? XFAIL_TEST : 0)
/* On some architectures, glibc can be built with compilers that do
not have suitable built-in functions for setting the payload of a
_Float128 NaN. */
#if ((defined __x86_64__ || defined __i386__ || defined __ia64__) \
&& !__GNUC_PREREQ (7, 0))
# define XFAIL_FLOAT128_PAYLOAD (TEST_COND_binary128 ? XFAIL_TEST : 0)
#else
# define XFAIL_FLOAT128_PAYLOAD 0
#endif
/* Number of bits in NaN payload. */
#if TEST_COND_ibm128
# define PAYLOAD_DIG (DBL_MANT_DIG - 2)
#else
# define PAYLOAD_DIG (MANT_DIG - 2)
#endif
/* For narrowing functions, whether the argument format can represent
all the given argument values. */
#define TEST_COND_arg_fmt(MAX_EXP, NUM_ONES, MIN_EXP, MAX_PREC) \
(((MAX_EXP) < ARG_MAX_EXP) \
&& (!TEST_COND_arg_ibm128 \
|| (MAX_EXP) < ARG_MAX_EXP - 1 \
|| (NUM_ONES) <= 53) \
&& (MIN_EXP) >= ARG_MIN_EXP - ARG_MANT_DIG \
&& (MAX_PREC) <= ARG_MANT_DIG)
/* Values underflowing on architectures detecting tininess before
rounding, but not on those detecting tininess after rounding. */
#define UNDERFLOW_EXCEPTION_BEFORE_ROUNDING (TININESS_AFTER_ROUNDING \
? 0 \
: UNDERFLOW_EXCEPTION)
#if LONG_MAX == 0x7fffffff
# define TEST_COND_long32 1
# define TEST_COND_long64 0
#else
# define TEST_COND_long32 0
# define TEST_COND_long64 1
#endif
#define TEST_COND_before_rounding (!TININESS_AFTER_ROUNDING)
#define TEST_COND_after_rounding TININESS_AFTER_ROUNDING
int enable_test (int);
void init_max_error (const char *, int, int);
void print_max_error (const char *);
void print_complex_max_error (const char *);
void check_float (const char *, FLOAT, FLOAT, int);
void check_complex (const char *, CFLOAT, CFLOAT, int);
void check_int (const char *, int, int, int);
void check_long (const char *, long int, long int, int);
void check_bool (const char *, int, int, int);
void check_longlong (const char *, long long int, long long int, int);
void check_intmax_t (const char *, intmax_t, intmax_t, int);
void check_uintmax_t (const char *, uintmax_t, uintmax_t, int);
void libm_test_init (int, char **);
int libm_test_finish (void);
#endif /* LIBM_TEST_SUPPORT_H. */
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