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glibc/sysdeps/powerpc/test-arith.c

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/* Test floating-point arithmetic operations.
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/>. */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fenv.h>
#include <assert.h>
#ifndef ESIZE
typedef double tocheck_t;
#define ESIZE 11
#define MSIZE 52
#define FUNC(x) x
#endif
#define R_NEAREST 1
#define R_ZERO 2
#define R_UP 4
#define R_DOWN 8
#define R_ALL (R_NEAREST|R_ZERO|R_UP|R_DOWN)
static fenv_t rmodes[4];
static const char * const rmnames[4] =
{ "nearest","zero","+Inf","-Inf" };
typedef union {
tocheck_t tc;
unsigned char c[sizeof (tocheck_t)];
} union_t;
/* Don't try reading these in a font that doesn't distinguish
O and zero. */
typedef enum {
P_Z = 0x0, /* 00000...0 */
P_000O = 0x1, /* 00011...1 */
P_001Z = 0x2, /* 00100...0 */
P_00O = 0x3, /* 00111...1 */
P_01Z = 0x4, /* 01000...0 */
P_010O = 0x5, /* 01011...1 */
P_011Z = 0x6, /* 01100...0 */
P_0O = 0x7, /* 01111...1 */
P_1Z = 0x8, /* 10000...0 */
P_100O = 0x9, /* 10011...1 */
P_101Z = 0xa, /* 10100...0 */
P_10O = 0xb, /* 10111...1 */
P_11Z = 0xc, /* 11000...0 */
P_110O = 0xd, /* 11011...1 */
P_111Z = 0xe, /* 11100...0 */
P_O = 0xf, /* 11111...1 */
P_Z1 = 0x11, /* 000...001 */
P_Z10 = 0x12, /* 000...010 */
P_Z11 = 0x13, /* 000...011 */
P_0O00 = 0x14, /* 011...100 */
P_0O01 = 0x15, /* 011...101 */
P_0O0 = 0x16, /* 011...110 */
P_1Z1 = 0x19, /* 100...001 */
P_1Z10 = 0x1a, /* 100...010 */
P_1Z11 = 0x1b, /* 100...011 */
P_O00 = 0x1c, /* 111...100 */
P_O01 = 0x1d, /* 111...101 */
P_O0 = 0x1e, /* 111...110 */
P_R = 0x20, /* rrr...rrr */ /* ('r' means random. ) */
P_Ro = 0x21, /* rrr...rrr, with odd parity. */
P_0R = 0x22, /* 0rr...rrr */
P_1R = 0x23, /* 1rr...rrr */
P_Rno = 0x24, /* rrr...rrr, but not all ones. */
} pattern_t;
static void
pattern_fill(pattern_t ptn, unsigned char *start, int bitoffset, int count)
{
#define bitset(count, value) \
start[(count)/8] = (start[(count)/8] & ~(1 << 7-(count)%8) \
| (value) << 7-(count)%8)
int i;
if (ptn >= 0 && ptn <= 0xf)
{
/* Patterns between 0 and 0xF have the following format:
The LSBit is used to fill the last n-3 bits of the pattern;
The next 3 bits are the first 3 bits of the pattern. */
for (i = 0; i < count; i++)
if (i < 3)
bitset((bitoffset+i), ptn >> (3-i) & 1);
else
bitset((bitoffset+i), ptn >> 0 & 1);
}
else if (ptn <= 0x1f)
{
/* Patterns between 0x10 and 0x1F have the following format:
The two LSBits are the last two bits of the pattern;
The 0x8 bit is the first bit of the pattern;
The 0x4 bit is used to fill the remainder. */
for (i = 0; i < count; i++)
if (i == 0)
bitset((bitoffset+i), ptn >> 3 & 1);
else if (i >= count-2)
bitset((bitoffset+i), ptn >> (count-1-i) & 1);
else
bitset((bitoffset+i), ptn >> 2 & 1);
}
else switch (ptn)
{
case P_0R: case P_1R:
assert(count > 0);
bitset(bitoffset, ptn & 1);
count--;
bitoffset++;
case P_R:
for (; count > 0; count--, bitoffset++)
bitset(bitoffset, rand() & 1);
break;
case P_Ro:
{
int op = 1;
assert(count > 0);
for (; count > 1; count--, bitoffset++)
bitset(bitoffset, op ^= (rand() & 1));
bitset(bitoffset, op);
break;
}
case P_Rno:
{
int op = 1;
assert(count > 0);
for (; count > 1; count--, bitoffset++)
{
int r = rand() & 1;
op &= r;
bitset(bitoffset, r);
}
bitset(bitoffset, rand() & (op ^ 1));
break;
}
default:
assert(0);
}
#undef bitset
}
static tocheck_t
pattern(int negative, pattern_t exp, pattern_t mant)
{
union_t result;
#if 0
int i;
#endif
pattern_fill(negative ? P_O : P_Z, result.c, 0, 1);
pattern_fill(exp, result.c, 1, ESIZE);
pattern_fill(mant, result.c, ESIZE+1, MSIZE);
#if 0
printf("neg=%d exp=%02x mant=%02x: ", negative, exp, mant);
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", result.c[i]);
printf("\n");
#endif
return result.tc;
}
/* Return the closest different tocheck_t to 'x' in the direction of
'direction', or 'x' if there is no such value. Assumes 'x' is not
a NaN. */
static tocheck_t
delta(tocheck_t x, int direction)
{
union_t xx;
int i;
xx.tc = x;
if (xx.c[0] & 0x80)
direction = -direction;
if (direction == +1)
{
union_t tx;
tx.tc = pattern(xx.c[0] >> 7, P_O, P_Z);
if (memcmp (tx.c, xx.c, sizeof (tocheck_t)) == 0)
return x;
}
for (i = sizeof (tocheck_t)-1; i > 0; i--)
{
xx.c[i] += direction;
if (xx.c[i] != (direction > 0 ? 0 : 0xff))
return xx.tc;
}
if (direction < 0 && (xx.c[0] & 0x7f) == 0)
return pattern(~(xx.c[0] >> 7) & 1, P_Z, P_Z1);
else
{
xx.c[0] += direction;
return xx.tc;
}
}
static int nerrors = 0;
#ifdef FE_ALL_INVALID
static const int all_exceptions = FE_ALL_INVALID | FE_ALL_EXCEPT;
#else
static const int all_exceptions = FE_ALL_EXCEPT;
#endif
static void
check_result(int line, const char *rm, tocheck_t expected, tocheck_t actual)
{
if (memcmp (&expected, &actual, sizeof (tocheck_t)) != 0)
{
unsigned char *ex, *ac;
size_t i;
printf("%s:%d:round %s:result failed\n"
" expected result 0x", __FILE__, line, rm);
ex = (unsigned char *)&expected;
ac = (unsigned char *)&actual;
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", ex[i]);
printf(" got 0x");
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", ac[i]);
printf("\n");
nerrors++;
}
}
static const struct {
int except;
const char *name;
} excepts[] = {
#define except_entry(ex) { ex, #ex } ,
#ifdef FE_INEXACT
except_entry(FE_INEXACT)
#else
# define FE_INEXACT 0
#endif
#ifdef FE_DIVBYZERO
except_entry(FE_DIVBYZERO)
#else
# define FE_DIVBYZERO 0
#endif
#ifdef FE_UNDERFLOW
except_entry(FE_UNDERFLOW)
#else
# define FE_UNDERFLOW 0
#endif
#ifdef FE_OVERFLOW
except_entry(FE_OVERFLOW)
#else
# define FE_OVERFLOW 0
#endif
#ifdef FE_INVALID
except_entry(FE_INVALID)
#else
# define FE_INVALID 0
#endif
#ifdef FE_INVALID_SNAN
except_entry(FE_INVALID_SNAN)
#else
# define FE_INVALID_SNAN FE_INVALID
#endif
#ifdef FE_INVALID_ISI
except_entry(FE_INVALID_ISI)
#else
# define FE_INVALID_ISI FE_INVALID
#endif
#ifdef FE_INVALID_IDI
except_entry(FE_INVALID_IDI)
#else
# define FE_INVALID_IDI FE_INVALID
#endif
#ifdef FE_INVALID_ZDZ
except_entry(FE_INVALID_ZDZ)
#else
# define FE_INVALID_ZDZ FE_INVALID
#endif
#ifdef FE_INVALID_COMPARE
except_entry(FE_INVALID_COMPARE)
#else
# define FE_INVALID_COMPARE FE_INVALID
#endif
#ifdef FE_INVALID_SOFTWARE
except_entry(FE_INVALID_SOFTWARE)
#else
# define FE_INVALID_SOFTWARE FE_INVALID
#endif
#ifdef FE_INVALID_SQRT
except_entry(FE_INVALID_SQRT)
#else
# define FE_INVALID_SQRT FE_INVALID
#endif
#ifdef FE_INVALID_INTEGER_CONVERSION
except_entry(FE_INVALID_INTEGER_CONVERSION)
#else
# define FE_INVALID_INTEGER_CONVERSION FE_INVALID
#endif
};
static int excepts_missing = 0;
static void
check_excepts(int line, const char *rm, int expected, int actual)
{
if (expected & excepts_missing)
expected = expected & ~excepts_missing | FE_INVALID_SNAN;
if ((expected & all_exceptions) != actual)
{
size_t i;
printf("%s:%d:round %s:exceptions failed\n"
" expected exceptions ", __FILE__, line,rm);
for (i = 0; i < sizeof (excepts) / sizeof (excepts[0]); i++)
if (expected & excepts[i].except)
printf("%s ",excepts[i].name);
if ((expected & all_exceptions) == 0)
printf("- ");
printf("got");
for (i = 0; i < sizeof (excepts) / sizeof (excepts[0]); i++)
if (actual & excepts[i].except)
printf(" %s",excepts[i].name);
if ((actual & all_exceptions) == 0)
printf("- ");
printf(".\n");
nerrors++;
}
}
typedef enum {
B_ADD, B_SUB, B_MUL, B_DIV, B_NEG, B_ABS, B_SQRT
} op_t;
typedef struct {
int line;
op_t op;
int a_sgn;
pattern_t a_exp, a_mant;
int b_sgn;
pattern_t b_exp, b_mant;
int rmode;
int excepts;
int x_sgn;
pattern_t x_exp, x_mant;
} optest_t;
static const optest_t optests[] = {
/* Additions of zero. */
{__LINE__,B_ADD, 0,P_Z,P_Z, 0,P_Z,P_Z, R_ALL,0, 0,P_Z,P_Z },
{__LINE__,B_ADD, 1,P_Z,P_Z, 0,P_Z,P_Z, R_ALL & ~R_DOWN,0, 0,P_Z,P_Z },
{__LINE__,B_ADD, 1,P_Z,P_Z, 0,P_Z,P_Z, R_DOWN,0, 1,P_Z,P_Z },
{__LINE__,B_ADD, 1,P_Z,P_Z, 1,P_Z,P_Z, R_ALL,0, 1,P_Z,P_Z },
/* Additions with NaN. */
{__LINE__,B_ADD, 0,P_O,P_101Z, 0,P_Z,P_Z, R_ALL,0, 0,P_O,P_101Z },
{__LINE__,B_ADD, 0,P_O,P_01Z, 0,P_Z,P_Z, R_ALL,
FE_INVALID | FE_INVALID_SNAN, 0,P_O,P_11Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 0,P_O,P_0O, R_ALL,
FE_INVALID | FE_INVALID_SNAN, 0,P_O,P_O },
{__LINE__,B_ADD, 0,P_Z,P_Z, 0,P_O,P_11Z, R_ALL,0, 0,P_O,P_11Z },
{__LINE__,B_ADD, 0,P_O,P_001Z, 0,P_O,P_001Z, R_ALL,
FE_INVALID | FE_INVALID_SNAN, 0,P_O,P_101Z },
{__LINE__,B_ADD, 0,P_O,P_1Z, 0,P_Z,P_Z, R_ALL,0, 0,P_O,P_1Z },
{__LINE__,B_ADD, 0,P_0O,P_Z, 0,P_O,P_10O, R_ALL,0, 0,P_O,P_10O },
/* Additions with infinity. */
{__LINE__,B_ADD, 0,P_O,P_Z, 0,P_Z,P_Z, R_ALL,0, 0,P_O,P_Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 1,P_Z,P_Z, R_ALL,0, 0,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 0,P_Z,P_Z, R_ALL,0, 1,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 1,P_Z,P_Z, R_ALL,0, 1,P_O,P_Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 0,P_O,P_Z, R_ALL,0, 0,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 1,P_O,P_Z, R_ALL,0, 1,P_O,P_Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 1,P_O,P_Z, R_ALL,
FE_INVALID | FE_INVALID_ISI, 0,P_O,P_1Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 0,P_O,P_Z, R_ALL,
FE_INVALID | FE_INVALID_ISI, 0,P_O,P_1Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 0,P_0O,P_Z, R_ALL,0, 0,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 0,P_0O,P_Z, R_ALL,0, 1,P_O,P_Z },
{__LINE__,B_ADD, 0,P_O,P_Z, 1,P_0O,P_Z, R_ALL,0, 0,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O,P_Z, 1,P_0O,P_Z, R_ALL,0, 1,P_O,P_Z },
/* Overflow (and zero). */
{__LINE__,B_ADD, 0,P_O0,P_Z, 0,P_O0,P_Z, R_NEAREST | R_UP,
FE_INEXACT | FE_OVERFLOW, 0,P_O,P_Z },
{__LINE__,B_ADD, 0,P_O0,P_Z, 0,P_O0,P_Z, R_ZERO | R_DOWN,
FE_INEXACT | FE_OVERFLOW, 0,P_O0,P_O },
{__LINE__,B_ADD, 1,P_O0,P_Z, 1,P_O0,P_Z, R_NEAREST | R_DOWN,
FE_INEXACT | FE_OVERFLOW, 1,P_O,P_Z },
{__LINE__,B_ADD, 1,P_O0,P_Z, 1,P_O0,P_Z, R_ZERO | R_UP,
FE_INEXACT | FE_OVERFLOW, 1,P_O0,P_O },
{__LINE__,B_ADD, 0,P_O0,P_Z, 1,P_O0,P_Z, R_ALL & ~R_DOWN,
0, 0,P_Z,P_Z },
{__LINE__,B_ADD, 0,P_O0,P_Z, 1,P_O0,P_Z, R_DOWN,
0, 1,P_Z,P_Z },
/* Negation. */
{__LINE__,B_NEG, 0,P_Z,P_Z, 0,0,0, R_ALL, 0, 1,P_Z,P_Z },
{__LINE__,B_NEG, 1,P_Z,P_Z, 0,0,0, R_ALL, 0, 0,P_Z,P_Z },
{__LINE__,B_NEG, 0,P_O,P_Z, 0,0,0, R_ALL, 0, 1,P_O,P_Z },
{__LINE__,B_NEG, 1,P_O,P_Z, 0,0,0, R_ALL, 0, 0,P_O,P_Z },
{__LINE__,B_NEG, 0,P_O,P_1Z, 0,0,0, R_ALL, 0, 1,P_O,P_1Z },
{__LINE__,B_NEG, 1,P_O,P_1Z, 0,0,0, R_ALL, 0, 0,P_O,P_1Z },
{__LINE__,B_NEG, 0,P_O,P_01Z, 0,0,0, R_ALL, 0, 1,P_O,P_01Z },
{__LINE__,B_NEG, 1,P_O,P_01Z, 0,0,0, R_ALL, 0, 0,P_O,P_01Z },
{__LINE__,B_NEG, 0,P_1Z,P_1Z1, 0,0,0, R_ALL, 0, 1,P_1Z,P_1Z1 },
{__LINE__,B_NEG, 1,P_1Z,P_1Z1, 0,0,0, R_ALL, 0, 0,P_1Z,P_1Z1 },
{__LINE__,B_NEG, 0,P_Z,P_Z1, 0,0,0, R_ALL, 0, 1,P_Z,P_Z1 },
{__LINE__,B_NEG, 1,P_Z,P_Z1, 0,0,0, R_ALL, 0, 0,P_Z,P_Z1 },
/* Absolute value. */
{__LINE__,B_ABS, 0,P_Z,P_Z, 0,0,0, R_ALL, 0, 0,P_Z,P_Z },
{__LINE__,B_ABS, 1,P_Z,P_Z, 0,0,0, R_ALL, 0, 0,P_Z,P_Z },
{__LINE__,B_ABS, 0,P_O,P_Z, 0,0,0, R_ALL, 0, 0,P_O,P_Z },
{__LINE__,B_ABS, 1,P_O,P_Z, 0,0,0, R_ALL, 0, 0,P_O,P_Z },
{__LINE__,B_ABS, 0,P_O,P_1Z, 0,0,0, R_ALL, 0, 0,P_O,P_1Z },
{__LINE__,B_ABS, 1,P_O,P_1Z, 0,0,0, R_ALL, 0, 0,P_O,P_1Z },
{__LINE__,B_ABS, 0,P_O,P_01Z, 0,0,0, R_ALL, 0, 0,P_O,P_01Z },
{__LINE__,B_ABS, 1,P_O,P_01Z, 0,0,0, R_ALL, 0, 0,P_O,P_01Z },
{__LINE__,B_ABS, 0,P_1Z,P_1Z1, 0,0,0, R_ALL, 0, 0,P_1Z,P_1Z1 },
{__LINE__,B_ABS, 1,P_1Z,P_1Z1, 0,0,0, R_ALL, 0, 0,P_1Z,P_1Z1 },
{__LINE__,B_ABS, 0,P_Z,P_Z1, 0,0,0, R_ALL, 0, 0,P_Z,P_Z1 },
{__LINE__,B_ABS, 1,P_Z,P_Z1, 0,0,0, R_ALL, 0, 0,P_Z,P_Z1 },
/* Square root. */
{__LINE__,B_SQRT, 0,P_Z,P_Z, 0,0,0, R_ALL, 0, 0,P_Z,P_Z },
{__LINE__,B_SQRT, 1,P_Z,P_Z, 0,0,0, R_ALL, 0, 1,P_Z,P_Z },
{__LINE__,B_SQRT, 0,P_O,P_1Z, 0,0,0, R_ALL, 0, 0,P_O,P_1Z },
{__LINE__,B_SQRT, 1,P_O,P_1Z, 0,0,0, R_ALL, 0, 1,P_O,P_1Z },
{__LINE__,B_SQRT, 0,P_O,P_01Z, 0,0,0, R_ALL,
FE_INVALID | FE_INVALID_SNAN, 0,P_O,P_11Z },
{__LINE__,B_SQRT, 1,P_O,P_01Z, 0,0,0, R_ALL,
FE_INVALID | FE_INVALID_SNAN, 1,P_O,P_11Z },
{__LINE__,B_SQRT, 0,P_O,P_Z, 0,0,0, R_ALL, 0, 0,P_O,P_Z },
{__LINE__,B_SQRT, 0,P_0O,P_Z, 0,0,0, R_ALL, 0, 0,P_0O,P_Z },
{__LINE__,B_SQRT, 1,P_O,P_Z, 0,0,0, R_ALL,
FE_INVALID | FE_INVALID_SQRT, 0,P_O,P_1Z },
{__LINE__,B_SQRT, 1,P_1Z,P_1Z1, 0,0,0, R_ALL,
FE_INVALID | FE_INVALID_SQRT, 0,P_O,P_1Z },
{__LINE__,B_SQRT, 1,P_Z,P_Z1, 0,0,0, R_ALL,
FE_INVALID | FE_INVALID_SQRT, 0,P_O,P_1Z },
};
static void
check_op(void)
{
size_t i;
int j;
tocheck_t r, a, b, x;
int raised;
for (i = 0; i < sizeof (optests) / sizeof (optests[0]); i++)
{
a = pattern(optests[i].a_sgn, optests[i].a_exp,
optests[i].a_mant);
b = pattern(optests[i].b_sgn, optests[i].b_exp,
optests[i].b_mant);
x = pattern(optests[i].x_sgn, optests[i].x_exp,
optests[i].x_mant);
for (j = 0; j < 4; j++)
if (optests[i].rmode & 1<<j)
{
fesetenv(rmodes+j);
switch (optests[i].op)
{
case B_ADD: r = a + b; break;
case B_SUB: r = a - b; break;
case B_MUL: r = a * b; break;
case B_DIV: r = a / b; break;
case B_NEG: r = -a; break;
case B_ABS: r = FUNC(fabs)(a); break;
case B_SQRT: r = FUNC(sqrt)(a); break;
}
raised = fetestexcept(all_exceptions);
check_result(optests[i].line,rmnames[j],x,r);
check_excepts(optests[i].line,rmnames[j],
optests[i].excepts,raised);
}
}
}
static void
fail_xr(int line, const char *rm, tocheck_t x, tocheck_t r, tocheck_t xx,
int xflag)
{
size_t i;
unsigned char *cx, *cr, *cxx;
printf("%s:%d:round %s:fail\n with x=0x", __FILE__, line,rm);
cx = (unsigned char *)&x;
cr = (unsigned char *)&r;
cxx = (unsigned char *)&xx;
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", cx[i]);
printf(" r=0x");
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", cr[i]);
printf(" xx=0x");
for (i = 0; i < sizeof (tocheck_t); i++)
printf("%02x", cxx[i]);
printf(" inexact=%d\n", xflag != 0);
nerrors++;
}
static void
check_sqrt(tocheck_t a)
{
int j;
tocheck_t r0, r1, r2, x0, x1, x2;
int raised = 0;
int ok;
for (j = 0; j < 4; j++)
{
int excepts;
fesetenv(rmodes+j);
r1 = FUNC(sqrt)(a);
excepts = fetestexcept(all_exceptions);
fesetenv(FE_DFL_ENV);
raised |= excepts & ~FE_INEXACT;
x1 = r1 * r1 - a;
if (excepts & FE_INEXACT)
{
r0 = delta(r1,-1); r2 = delta(r1,1);
switch (1 << j)
{
case R_NEAREST:
x0 = r0 * r0 - a; x2 = r2 * r2 - a;
ok = fabs(x0) >= fabs(x1) && fabs(x1) <= fabs(x2);
break;
case R_ZERO: case R_DOWN:
x2 = r2 * r2 - a;
ok = x1 <= 0 && x2 >= 0;
break;
case R_UP:
x0 = r0 * r0 - a;
ok = x1 >= 0 && x0 <= 0;
break;
default:
assert(0);
}
}
else
ok = x1 == 0;
if (!ok)
fail_xr(__LINE__,rmnames[j],a,r1,x1,excepts&FE_INEXACT);
}
check_excepts(__LINE__,"all",0,raised);
}
int main(int argc, char **argv)
{
int i;
_LIB_VERSION = _IEEE_;
/* Set up environments for rounding modes. */
fesetenv(FE_DFL_ENV);
fesetround(FE_TONEAREST);
fegetenv(rmodes+0);
fesetround(FE_TOWARDZERO);
fegetenv(rmodes+1);
fesetround(FE_UPWARD);
fegetenv(rmodes+2);
fesetround(FE_DOWNWARD);
fegetenv(rmodes+3);
#if defined(FE_INVALID_SOFTWARE) || defined(FE_INVALID_SQRT)
/* There's this really stupid feature of the 601... */
fesetenv(FE_DFL_ENV);
feraiseexcept(FE_INVALID_SOFTWARE);
if (!fetestexcept(FE_INVALID_SOFTWARE))
excepts_missing |= FE_INVALID_SOFTWARE;
fesetenv(FE_DFL_ENV);
feraiseexcept(FE_INVALID_SQRT);
if (!fetestexcept(FE_INVALID_SQRT))
excepts_missing |= FE_INVALID_SQRT;
#endif
check_op();
for (i = 0; i < 100000; i++)
check_sqrt(pattern(0, P_Rno, P_R));
for (i = 0; i < 100; i++)
check_sqrt(pattern(0, P_Z, P_R));
check_sqrt(pattern(0,P_Z,P_Z1));
printf("%d errors.\n", nerrors);
return nerrors == 0 ? 0 : 1;
}
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