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[ARC] Handle FPX NaN within optimized floating point library.

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gcc/
2016-04-29  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/gcc.target/arc/ieee_eq.c: New test.

libgcc/
2016-04-29  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/ieee-754/eqdf2.S: Handle FPX NaN.

From-SVN: r235633
This commit is contained in:
Claudiu Zissulescu 2016-04-29 12:49:26 +02:00 committed by Claudiu Zissulescu
parent af95276348
commit 39d5046452
4 changed files with 65 additions and 5 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2016-04-29 Claudiu Zissulescu <claziss@synopsys.com>
* testsuite/gcc.target/arc/ieee_eq.c: New test.
2016-04-29 Oleg Endo <olegendo@gcc.gnu.org>
* common/config/sh/sh-common.c (sh_option_optimization_table): Remove

47
gcc/testsuite/gcc.target/arc/ieee_eq.c Normal file
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@ -0,0 +1,47 @@
/* { dg-do run } */
/* { dg-options "-O2" } */
#include <stdio.h>
#include <float.h>
#define TEST_EQ(TYPE,X,Y,RES) \
do { \
volatile TYPE a, b; \
a = (TYPE) X; \
b = (TYPE) Y; \
if ((a == b) != RES) \
{ \
printf ("Runtime computation error @%d. %g " \
"!= %g\n", __LINE__, a, b); \
error = 1; \
} \
} while (0)
#ifndef __HS__
/* Special type of NaN found when using double FPX instructions. */
static const unsigned long long __nan = 0x7FF0000080000000ULL;
# define W (*(double *) &__nan)
#else
# define W __builtin_nan ("")
#endif
#define Q __builtin_nan ("")
#define H __builtin_inf ()
int main (void)
{
int error = 0;
TEST_EQ (double, 1, 1, 1);
TEST_EQ (double, 1, 2, 0);
TEST_EQ (double, W, W, 0);
TEST_EQ (double, Q, Q, 0);
TEST_EQ (double, __DBL_MAX__, __DBL_MAX__, 1);
TEST_EQ (double, __DBL_MIN__, __DBL_MIN__, 1);
TEST_EQ (double, H, H, 1);
if (error)
__builtin_abort ();
return 0;
}

4
libgcc/ChangeLog
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@ -1,3 +1,7 @@
2016-04-29 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/ieee-754/eqdf2.S: Handle FPX NaN.
2016-04-28 Claudiu Zissulescu <claziss@synopsys.com>
Joern Rennecke <joern.rennecke@embecosm.com>

15
libgcc/config/arc/ieee-754/eqdf2.S
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@ -58,11 +58,16 @@ __eqdf2:
well predictable (as seen from the branch predictor). */
__eqdf2:
brne.d DBL0H,DBL1H,.Lhighdiff
bmsk r12,DBL0H,20
#ifdef DPFP_COMPAT
or.f 0,DBL0L,DBL1L
bset.ne r12,r12,21
#endif /* DPFP_COMPAT */
#ifndef __HS__
/* The next two instructions are required to recognize the FPX
NaN, which has a pattern like this: 0x7ff0_0000_8000_0000, as
oposite to 0x7ff8_0000_0000_0000. */
or.f 0,DBL0L,DBL1L
mov_s r12,0x00200000
bset.ne r12,r12,0
#else
bmsk r12,DBL0H,20
#endif /* __HS__ */
add1.f r12,r12,DBL0H /* set c iff NaN; also, clear z if NaN. */
j_s.d [blink]
cmp.cc DBL0L,DBL1L