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Re: PowerPC floating point little-endian [1 of 15]
- From: Alan Modra <amodra at gmail dot com>
- To: libc-alpha at sourceware dot org
- Date: Fri, 9 Aug 2013 14:08:35 +0930
- Subject: Re: PowerPC floating point little-endian [1 of 15]
- References: <20130710012435 dot GN2602 at bubble dot grove dot modra dot org>
This is a repost of
http://sourceware.org/ml/libc-alpha/2013-07/msg00192.html with some
additional files modified for the fpnum union change. The original
patch was approved so I'm assuming the extra changes count as obvious,
and this is what I'll commit after the release.
(Anyone applying this diff to mainline will hit an easily fixed patch
reject. I generated the diff against a tree containing
http://sourceware.org/ml/libc-alpha/2013-05/msg00819.html,
http://sourceware.org/ml/libc-alpha/2013-07/msg00001.html, and
http://sourceware.org/ml/libc-alpha/2013-06/msg00919.html)
* stdio-common/printf_size.c (__printf_size): Don't use
union ieee854_long_double in fpnum union.
* stdio-common/printf_fphex.c (__printf_fphex): Likewise. Use
signbit macro to retrieve sign from long double.
* stdio-common/printf_fp.c (___printf_fp): Use signbit macro to
retrieve sign from long double.
* sysdeps/ieee754/ldbl-128ibm/printf_fphex.c: Adjust for fpnum change.
* sysdeps/ieee754/ldbl-128/printf_fphex.c: Likewise.
* sysdeps/ieee754/ldbl-96/printf_fphex.c: Likewise.
* sysdeps/x86_64/fpu/printf_fphex.c: Likewise.
* math/test-misc.c (main): Don't use union ieee854_long_double.
ports/
* sysdeps/ia64/fpu/printf_fphex.c: Adjust for fpnum change.
diff --git a/math/test-misc.c b/math/test-misc.c
index 27d673b..f5276eb 100644
--- a/math/test-misc.c
+++ b/math/test-misc.c
@@ -722,300 +722,161 @@ main (void)
#ifndef NO_LONG_DOUBLE
{
- union ieee854_long_double v1;
- union ieee854_long_double v2;
- long double ld;
+ long double v1, v2;
- v1.d = ld = LDBL_MIN;
- if (fpclassify (ld) != FP_NORMAL)
+ v1 = LDBL_MIN;
+ if (fpclassify (v1) != FP_NORMAL)
{
- printf ("fpclassify (LDBL_MIN) failed: %d\n", fpclassify (ld));
+ printf ("fpclassify (LDBL_MIN) failed: %d (%La)\n",
+ fpclassify (v1), v1);
result = 1;
}
- ld = nextafterl (ld, LDBL_MIN / 2.0);
- if (fpclassify (ld) != FP_SUBNORMAL)
+ v2 = nextafterl (v1, LDBL_MIN / 2.0);
+ if (fpclassify (v2) != FP_SUBNORMAL)
{
printf ("fpclassify (LDBL_MIN-epsilon) failed: %d (%La)\n",
- fpclassify (ld), ld);
+ fpclassify (v2), v2);
result = 1;
}
- v2.d = ld = nextafterl (ld, LDBL_MIN);
- if (fpclassify (ld) != FP_NORMAL)
+ v2 = nextafterl (v2, LDBL_MIN);
+ if (fpclassify (v2) != FP_NORMAL)
{
printf ("fpclassify (LDBL_MIN-epsilon+epsilon) failed: %d (%La)\n",
- fpclassify (ld), ld);
+ fpclassify (v2), v2);
result = 1;
}
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
+ if (v1 != v2)
{
- printf ("LDBL_MIN: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("LDBL_MIN: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
- {
- printf ("LDBL_MIN: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
- {
- printf ("LDBL_MIN: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("LDBL_MIN-epsilon+epsilon != LDBL_MIN: %La vs %La\n", v2, v1);
result = 1;
}
- v1.d = ld = -LDBL_MIN;
- if (fpclassify (ld) != FP_NORMAL)
+ v1 = -LDBL_MIN;
+ if (fpclassify (v1) != FP_NORMAL)
{
- printf ("fpclassify (-LDBL_MIN) failed: %d\n", fpclassify (ld));
+ printf ("fpclassify (-LDBL_MIN) failed: %d (%La)\n",
+ fpclassify (v1), v1);
result = 1;
}
- ld = nextafterl (ld, -LDBL_MIN / 2.0);
- if (fpclassify (ld) != FP_SUBNORMAL)
+ v2 = nextafterl (v1, -LDBL_MIN / 2.0);
+ if (fpclassify (v2) != FP_SUBNORMAL)
{
printf ("fpclassify (-LDBL_MIN-epsilon) failed: %d (%La)\n",
- fpclassify (ld), ld);
+ fpclassify (v2), v2);
result = 1;
}
- v2.d = ld = nextafterl (ld, -LDBL_MIN);
- if (fpclassify (ld) != FP_NORMAL)
+ v2 = nextafterl (v2, -LDBL_MIN);
+ if (fpclassify (v2) != FP_NORMAL)
{
printf ("fpclassify (-LDBL_MIN-epsilon+epsilon) failed: %d (%La)\n",
- fpclassify (ld), ld);
+ fpclassify (v2), v2);
result = 1;
}
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("-LDBL_MIN: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("-LDBL_MIN: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
+ if (v1 != v2)
{
- printf ("-LDBL_MIN: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
- {
- printf ("-LDBL_MIN: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("-LDBL_MIN-epsilon+epsilon != -LDBL_MIN: %La vs %La\n", v2, v1);
result = 1;
}
- ld = LDBL_MAX;
- if (fpclassify (ld) != FP_NORMAL)
+ v1 = LDBL_MAX;
+ if (fpclassify (v1) != FP_NORMAL)
{
- printf ("fpclassify (LDBL_MAX) failed: %d\n", fpclassify (ld));
+ printf ("fpclassify (LDBL_MAX) failed: %d (%La)\n",
+ fpclassify (v1), v1);
result = 1;
}
- ld = nextafterl (ld, INFINITY);
- if (fpclassify (ld) != FP_INFINITE)
+ v2 = nextafterl (v1, INFINITY);
+ if (fpclassify (v2) != FP_INFINITE)
{
- printf ("fpclassify (LDBL_MAX+epsilon) failed: %d\n", fpclassify (ld));
+ printf ("fpclassify (LDBL_MAX+epsilon) failed: %d (%La)\n",
+ fpclassify (v2), v2);
result = 1;
}
- ld = -LDBL_MAX;
- if (fpclassify (ld) != FP_NORMAL)
+ v1 = -LDBL_MAX;
+ if (fpclassify (v1) != FP_NORMAL)
{
- printf ("fpclassify (-LDBL_MAX) failed: %d\n", fpclassify (ld));
+ printf ("fpclassify (-LDBL_MAX) failed: %d (%La)\n",
+ fpclassify (v1), v1);
result = 1;
}
- ld = nextafterl (ld, -INFINITY);
- if (fpclassify (ld) != FP_INFINITE)
+ v2 = nextafterl (v1, -INFINITY);
+ if (fpclassify (v2) != FP_INFINITE)
{
- printf ("fpclassify (-LDBL_MAX-epsilon) failed: %d\n",
- fpclassify (ld));
+ printf ("fpclassify (-LDBL_MAX-epsilon) failed: %d (%La)\n",
+ fpclassify (v2), v2);
result = 1;
}
- v1.d = ld = 0.0625;
- ld = nextafterl (ld, 0.0);
- v2.d = ld = nextafterl (ld, 1.0);
+ v1 = 0.0625;
+ v2 = nextafterl (v1, 0.0);
+ v2 = nextafterl (v2, 1.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("0.0625L down: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("0.0625L down: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
- {
- printf ("0.0625L down: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
+ if (v1 != v2)
{
- printf ("0.0625L down: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("0.0625L-epsilon+epsilon != 0.0625L: %La vs %La\n", v2, v1);
result = 1;
}
- v1.d = ld = 0.0625;
- ld = nextafterl (ld, 1.0);
- v2.d = ld = nextafterl (ld, 0.0);
+ v1 = 0.0625;
+ v2 = nextafterl (v1, 1.0);
+ v2 = nextafterl (v2, 0.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("0.0625L up: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("0.0625L up: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
- {
- printf ("0.0625L up: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
+ if (v1 != v2)
{
- printf ("0.0625L up: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("0.0625L+epsilon-epsilon != 0.0625L: %La vs %La\n", v2, v1);
result = 1;
}
- v1.d = ld = -0.0625;
- ld = nextafterl (ld, 0.0);
- v2.d = ld = nextafterl (ld, -1.0);
+ v1 = -0.0625;
+ v2 = nextafterl (v1, 0.0);
+ v2 = nextafterl (v2, -1.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
+ if (v1 != v2)
{
- printf ("-0.0625L up: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("-0.0625L up: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
- {
- printf ("-0.0625L up: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
- {
- printf ("-0.0625L up: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("-0.0625L+epsilon-epsilon != -0.0625L: %La vs %La\n", v2, v1);
result = 1;
}
- v1.d = ld = -0.0625;
- ld = nextafterl (ld, -1.0);
- v2.d = ld = nextafterl (ld, 0.0);
+ v1 = -0.0625;
+ v2 = nextafterl (v1, -1.0);
+ v2 = nextafterl (v2, 0.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("-0.0625L down: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("-0.0625L down: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
+ if (v1 != v2)
{
- printf ("-0.0625L down: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
- result = 1;
- }
- if (v1.ieee.negative != v2.ieee.negative)
- {
- printf ("-0.0625L down: negative differs: %d vs %d\n",
- v1.ieee.negative, v2.ieee.negative);
+ printf ("-0.0625L-epsilon+epsilon != -0.0625L: %La vs %La\n", v2, v1);
result = 1;
}
- v1.d = ld = 0.0;
- ld = nextafterl (ld, 1.0);
- v2.d = nextafterl (ld, -1.0);
+ v1 = 0.0;
+ v2 = nextafterl (v1, 1.0);
+ v2 = nextafterl (v2, -1.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("0.0L up: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
- {
- printf ("0.0L up: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
+ if (v1 != v2)
{
- printf ("0.0L up: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
+ printf ("0.0+epsilon-epsilon != 0.0L: %La vs %La\n", v2, v1);
result = 1;
}
- if (0 != v2.ieee.negative)
+ if (signbit (v2))
{
- printf ("0.0L up: negative differs: 0 vs %d\n",
- v2.ieee.negative);
+ printf ("0.0+epsilon-epsilon is negative\n");
result = 1;
}
- v1.d = ld = 0.0;
- ld = nextafterl (ld, -1.0);
- v2.d = nextafterl (ld, 1.0);
+ v1 = 0.0;
+ v2 = nextafterl (v1, -1.0);
+ v2 = nextafterl (v2, 1.0);
- if (v1.ieee.mantissa0 != v2.ieee.mantissa0)
- {
- printf ("0.0L down: mantissa0 differs: %8x vs %8x\n",
- v1.ieee.mantissa0, v2.ieee.mantissa0);
- result = 1;
- }
- if (v1.ieee.mantissa1 != v2.ieee.mantissa1)
+ if (v1 != v2)
{
- printf ("0.0L down: mantissa1 differs: %8x vs %8x\n",
- v1.ieee.mantissa1, v2.ieee.mantissa1);
- result = 1;
- }
- if (v1.ieee.exponent != v2.ieee.exponent)
- {
- printf ("0.0L down: exponent differs: %4x vs %4x\n",
- v1.ieee.exponent, v2.ieee.exponent);
+ printf ("0.0-epsilon+epsilon != 0.0L: %La vs %La\n", v2, v1);
result = 1;
}
- if (1 != v2.ieee.negative)
+ if (!signbit (v2))
{
- printf ("0.0L down: negative differs: 1 vs %d\n",
- v2.ieee.negative);
+ printf ("0.0-epsilon+epsilon is positive\n");
result = 1;
}
diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c
index e20eab6..2b93e6c 100644
--- a/stdio-common/printf_fp.c
+++ b/stdio-common/printf_fp.c
@@ -332,8 +332,7 @@ ___printf_fp (FILE *fp,
int res;
if (__isnanl (fpnum.ldbl))
{
- union ieee854_long_double u = { .d = fpnum.ldbl };
- is_neg = u.ieee.negative != 0;
+ is_neg = signbit (fpnum.ldbl);
if (isupper (info->spec))
{
special = "NAN";
diff --git a/stdio-common/printf_fphex.c b/stdio-common/printf_fphex.c
index 3da2eec..50b6fbf 100644
--- a/stdio-common/printf_fphex.c
+++ b/stdio-common/printf_fphex.c
@@ -93,7 +93,7 @@ __printf_fphex (FILE *fp,
union
{
union ieee754_double dbl;
- union ieee854_long_double ldbl;
+ long double ldbl;
}
fpnum;
@@ -162,12 +162,11 @@ __printf_fphex (FILE *fp,
#ifndef __NO_LONG_DOUBLE_MATH
if (info->is_long_double && sizeof (long double) > sizeof (double))
{
- fpnum.ldbl.d = *(const long double *) args[0];
+ fpnum.ldbl = *(const long double *) args[0];
/* Check for special values: not a number or infinity. */
- if (__isnanl (fpnum.ldbl.d))
+ if (__isnanl (fpnum.ldbl))
{
- negative = fpnum.ldbl.ieee.negative != 0;
if (isupper (info->spec))
{
special = "NAN";
@@ -181,8 +180,7 @@ __printf_fphex (FILE *fp,
}
else
{
- int res = __isinfl (fpnum.ldbl.d);
- if (res)
+ if (__isinfl (fpnum.ldbl))
{
if (isupper (info->spec))
{
@@ -194,11 +192,9 @@ __printf_fphex (FILE *fp,
special = "inf";
wspecial = L"inf";
}
- negative = res < 0;
}
- else
- negative = signbit (fpnum.ldbl.d);
}
+ negative = signbit (fpnum.ldbl);
}
else
#endif /* no long double */
diff --git a/stdio-common/printf_size.c b/stdio-common/printf_size.c
index 2c496e5..dfb3a53 100644
--- a/stdio-common/printf_size.c
+++ b/stdio-common/printf_size.c
@@ -103,7 +103,7 @@ __printf_size (FILE *fp, const struct printf_info *info,
union
{
union ieee754_double dbl;
- union ieee854_long_double ldbl;
+ long double ldbl;
}
fpnum;
const void *ptr = &fpnum;
@@ -123,25 +123,25 @@ __printf_size (FILE *fp, const struct printf_info *info,
#ifndef __NO_LONG_DOUBLE_MATH
if (info->is_long_double && sizeof (long double) > sizeof (double))
{
- fpnum.ldbl.d = *(const long double *) args[0];
+ fpnum.ldbl = *(const long double *) args[0];
/* Check for special values: not a number or infinity. */
- if (__isnanl (fpnum.ldbl.d))
+ if (__isnanl (fpnum.ldbl))
{
special = "nan";
wspecial = L"nan";
// fpnum_sign = 0; Already zero
}
- else if ((res = __isinfl (fpnum.ldbl.d)))
+ else if ((res = __isinfl (fpnum.ldbl)))
{
fpnum_sign = res;
special = "inf";
wspecial = L"inf";
}
else
- while (fpnum.ldbl.d >= divisor && tag[1] != '\0')
+ while (fpnum.ldbl >= divisor && tag[1] != '\0')
{
- fpnum.ldbl.d /= divisor;
+ fpnum.ldbl /= divisor;
++tag;
}
}
diff --git a/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c b/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
index 453c2be..3a7a308 100644
--- a/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
+++ b/sysdeps/ieee754/ldbl-128ibm/printf_fphex.c
@@ -27,7 +27,7 @@ do { \
unsigned long long hi, lo; \
int ediff; \
union ibm_extended_long_double u; \
- u.ld = fpnum.ldbl.d; \
+ u.ld = fpnum.ldbl; \
\
assert (sizeof (long double) == 16); \
\
diff --git a/ports/sysdeps/ia64/fpu/printf_fphex.c b/ports/sysdeps/ia64/fpu/printf_fphex.c
index ca02142..0698cda 100644
--- a/ports/sysdeps/ia64/fpu/printf_fphex.c
+++ b/ports/sysdeps/ia64/fpu/printf_fphex.c
@@ -25,9 +25,11 @@ do { \
/* The "strange" 80 bit format on ia64 has an explicit \
leading digit in the 64 bit mantissa. */ \
unsigned long long int num; \
+ union ieee854_long_double u; \
+ u.d = fpnum.ldbl; \
\
- num = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32 \
- | fpnum.ldbl.ieee.mantissa1); \
+ num = (((unsigned long long int) u.ieee.mantissa0) << 32 \
+ | u.ieee.mantissa1); \
\
zero_mantissa = num == 0; \
\
@@ -49,8 +51,8 @@ do { \
\
/* We have 3 bits from the mantissa in the leading nibble. \
Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \
- exponent = fpnum.ldbl.ieee.exponent; \
- \
+ exponent = u.ieee.exponent; \
+ \
if (exponent == 0) \
{ \
if (zero_mantissa) \
diff --git a/sysdeps/ieee754/ldbl-128/printf_fphex.c b/sysdeps/ieee754/ldbl-128/printf_fphex.c
index c9e09a4..e82228a 100644
--- a/sysdeps/ieee754/ldbl-128/printf_fphex.c
+++ b/sysdeps/ieee754/ldbl-128/printf_fphex.c
@@ -24,13 +24,15 @@ do { \
digits we use only the implicit digits for the number before \
the decimal point. */ \
unsigned long long int num0, num1; \
+ union ieee854_long_double u; \
+ u.d = fpnum.ldbl; \
\
assert (sizeof (long double) == 16); \
\
- num0 = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32 \
- | fpnum.ldbl.ieee.mantissa1); \
- num1 = (((unsigned long long int) fpnum.ldbl.ieee.mantissa2) << 32 \
- | fpnum.ldbl.ieee.mantissa3); \
+ num0 = (((unsigned long long int) u.ieee.mantissa0) << 32 \
+ | u.ieee.mantissa1); \
+ num1 = (((unsigned long long int) u.ieee.mantissa2) << 32 \
+ | u.ieee.mantissa3); \
\
zero_mantissa = (num0|num1) == 0; \
\
@@ -75,9 +77,9 @@ do { \
*--wnumstr = L'0'; \
} \
\
- leading = fpnum.ldbl.ieee.exponent == 0 ? '0' : '1'; \
+ leading = u.ieee.exponent == 0 ? '0' : '1'; \
\
- exponent = fpnum.ldbl.ieee.exponent; \
+ exponent = u.ieee.exponent; \
\
if (exponent == 0) \
{ \
diff --git a/sysdeps/ieee754/ldbl-96/printf_fphex.c b/sysdeps/ieee754/ldbl-96/printf_fphex.c
index f356a48..715c93b 100644
--- a/sysdeps/ieee754/ldbl-96/printf_fphex.c
+++ b/sysdeps/ieee754/ldbl-96/printf_fphex.c
@@ -25,11 +25,13 @@ do { \
/* The "strange" 80 bit format on ix86 and m68k has an explicit \
leading digit in the 64 bit mantissa. */ \
unsigned long long int num; \
+ union ieee854_long_double u; \
+ u.d = fpnum.ldbl; \
\
assert (sizeof (long double) == 12); \
\
- num = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32 \
- | fpnum.ldbl.ieee.mantissa1); \
+ num = (((unsigned long long int) u.ieee.mantissa0) << 32 \
+ | u.ieee.mantissa1); \
\
zero_mantissa = num == 0; \
\
@@ -62,7 +64,7 @@ do { \
\
/* We have 3 bits from the mantissa in the leading nibble. \
Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \
- exponent = fpnum.ldbl.ieee.exponent; \
+ exponent = u.ieee.exponent; \
\
if (exponent == 0) \
{ \
diff --git a/sysdeps/x86_64/fpu/printf_fphex.c b/sysdeps/x86_64/fpu/printf_fphex.c
index c85d1f7..be55f9c 100644
--- a/sysdeps/x86_64/fpu/printf_fphex.c
+++ b/sysdeps/x86_64/fpu/printf_fphex.c
@@ -25,10 +25,11 @@ do { \
/* The "strange" 80 bit format on ix86 and m68k has an explicit \
leading digit in the 64 bit mantissa. */ \
unsigned long long int num; \
+ union ieee854_long_double u; \
+ u.d = fpnum.ldbl; \
\
- \
- num = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32 \
- | fpnum.ldbl.ieee.mantissa1); \
+ num = (((unsigned long long int) u.ieee.mantissa0) << 32 \
+ | u.ieee.mantissa1); \
\
zero_mantissa = num == 0; \
\
@@ -61,7 +62,7 @@ do { \
\
/* We have 3 bits from the mantissa in the leading nibble. \
Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'. */ \
- exponent = fpnum.ldbl.ieee.exponent; \
+ exponent = u.ieee.exponent; \
\
if (exponent == 0) \
{ \
--
Alan Modra
Australia Development Lab, IBM