/* Decimal floating point support.
- Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software
+ Foundation, Inc.
This file is part of GCC.
decNumber structure is large enough to hold decimal128 digits. */
#include "decimal128.h"
+#include "decimal128Local.h"
#include "decimal64.h"
#include "decimal32.h"
#include "decNumber.h"
-static uint32_t
-dfp_byte_swap (uint32_t in)
-{
- uint32_t out = 0;
- unsigned char *p = (unsigned char *) &out;
- union {
- uint32_t i;
- unsigned char b[4];
- } u;
-
- u.i = in;
- p[0] = u.b[3];
- p[1] = u.b[2];
- p[2] = u.b[1];
- p[3] = u.b[0];
-
- return out;
-}
+#ifndef WORDS_BIGENDIAN
+#define WORDS_BIGENDIAN 0
+#endif
/* Initialize R (a real with the decimal flag set) from DN. Can
utilize status passed in via CONTEXT, if a previous operation had
memset (r, 0, sizeof (REAL_VALUE_TYPE));
r->cl = rvc_normal;
- if (decNumberIsZero (dn))
- r->cl = rvc_zero;
if (decNumberIsNaN (dn))
r->cl = rvc_nan;
if (decNumberIsInfinite (dn))
dn->bits ^= DECNEG;
}
-/* Encode a real into an IEEE 754R decimal32 type. */
+/* Encode a real into an IEEE 754 decimal32 type. */
void
encode_decimal32 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decimal32 d32;
decContext set;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
decimal_to_decnumber (r, &dn);
decimal32FromNumber (&d32, &dn, &set);
- if (FLOAT_WORDS_BIG_ENDIAN)
- buf[0] = *(uint32_t *) d32.bytes;
- else
- buf[0] = dfp_byte_swap (*(uint32_t *) d32.bytes);
+ memcpy (&image, d32.bytes, sizeof (int32_t));
+ buf[0] = image;
}
-/* Decode an IEEE 754R decimal32 type into a real. */
+/* Decode an IEEE 754 decimal32 type into a real. */
void
decode_decimal32 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decimal32 d32;
decContext set;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
- if (FLOAT_WORDS_BIG_ENDIAN)
- *((uint32_t *) d32.bytes) = (uint32_t) buf[0];
- else
- *((uint32_t *) d32.bytes) = dfp_byte_swap ((uint32_t) buf[0]);
+ image = buf[0];
+ memcpy (&d32.bytes, &image, sizeof (int32_t));
decimal32ToNumber (&d32, &dn);
decimal_from_decnumber (r, &dn, &set);
}
-/* Encode a real into an IEEE 754R decimal64 type. */
+/* Encode a real into an IEEE 754 decimal64 type. */
void
encode_decimal64 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decimal64 d64;
decContext set;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
decimal_to_decnumber (r, &dn);
decimal64FromNumber (&d64, &dn, &set);
- if (FLOAT_WORDS_BIG_ENDIAN)
+ if (WORDS_BIGENDIAN == FLOAT_WORDS_BIG_ENDIAN)
{
- buf[0] = *(uint32_t *) &d64.bytes[0];
- buf[1] = *(uint32_t *) &d64.bytes[4];
+ memcpy (&image, &d64.bytes[0], sizeof (int32_t));
+ buf[0] = image;
+ memcpy (&image, &d64.bytes[4], sizeof (int32_t));
+ buf[1] = image;
}
else
{
- buf[1] = dfp_byte_swap (*(uint32_t *) &d64.bytes[0]);
- buf[0] = dfp_byte_swap (*(uint32_t *) &d64.bytes[4]);
+ memcpy (&image, &d64.bytes[4], sizeof (int32_t));
+ buf[0] = image;
+ memcpy (&image, &d64.bytes[0], sizeof (int32_t));
+ buf[1] = image;
}
}
-/* Decode an IEEE 754R decimal64 type into a real. */
+/* Decode an IEEE 754 decimal64 type into a real. */
void
decode_decimal64 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decimal64 d64;
decContext set;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
- if (FLOAT_WORDS_BIG_ENDIAN)
+ if (WORDS_BIGENDIAN == FLOAT_WORDS_BIG_ENDIAN)
{
- *((uint32_t *) &d64.bytes[0]) = (uint32_t) buf[0];
- *((uint32_t *) &d64.bytes[4]) = (uint32_t) buf[1];
+ image = buf[0];
+ memcpy (&d64.bytes[0], &image, sizeof (int32_t));
+ image = buf[1];
+ memcpy (&d64.bytes[4], &image, sizeof (int32_t));
}
else
{
- *((uint32_t *) &d64.bytes[0]) = dfp_byte_swap ((uint32_t) buf[1]);
- *((uint32_t *) &d64.bytes[4]) = dfp_byte_swap ((uint32_t) buf[0]);
+ image = buf[1];
+ memcpy (&d64.bytes[0], &image, sizeof (int32_t));
+ image = buf[0];
+ memcpy (&d64.bytes[4], &image, sizeof (int32_t));
}
decimal64ToNumber (&d64, &dn);
decimal_from_decnumber (r, &dn, &set);
}
-/* Encode a real into an IEEE 754R decimal128 type. */
+/* Encode a real into an IEEE 754 decimal128 type. */
void
encode_decimal128 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decContext set;
decimal128 d128;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
decimal_to_decnumber (r, &dn);
decimal128FromNumber (&d128, &dn, &set);
- if (FLOAT_WORDS_BIG_ENDIAN)
+ if (WORDS_BIGENDIAN == FLOAT_WORDS_BIG_ENDIAN)
{
- buf[0] = *(uint32_t *) &d128.bytes[0];
- buf[1] = *(uint32_t *) &d128.bytes[4];
- buf[2] = *(uint32_t *) &d128.bytes[8];
- buf[3] = *(uint32_t *) &d128.bytes[12];
+ memcpy (&image, &d128.bytes[0], sizeof (int32_t));
+ buf[0] = image;
+ memcpy (&image, &d128.bytes[4], sizeof (int32_t));
+ buf[1] = image;
+ memcpy (&image, &d128.bytes[8], sizeof (int32_t));
+ buf[2] = image;
+ memcpy (&image, &d128.bytes[12], sizeof (int32_t));
+ buf[3] = image;
}
else
{
- buf[0] = dfp_byte_swap (*(uint32_t *) &d128.bytes[12]);
- buf[1] = dfp_byte_swap (*(uint32_t *) &d128.bytes[8]);
- buf[2] = dfp_byte_swap (*(uint32_t *) &d128.bytes[4]);
- buf[3] = dfp_byte_swap (*(uint32_t *) &d128.bytes[0]);
+ memcpy (&image, &d128.bytes[12], sizeof (int32_t));
+ buf[0] = image;
+ memcpy (&image, &d128.bytes[8], sizeof (int32_t));
+ buf[1] = image;
+ memcpy (&image, &d128.bytes[4], sizeof (int32_t));
+ buf[2] = image;
+ memcpy (&image, &d128.bytes[0], sizeof (int32_t));
+ buf[3] = image;
}
}
-/* Decode an IEEE 754R decimal128 type into a real. */
+/* Decode an IEEE 754 decimal128 type into a real. */
void
decode_decimal128 (const struct real_format *fmt ATTRIBUTE_UNUSED,
decNumber dn;
decimal128 d128;
decContext set;
+ int32_t image;
decContextDefault (&set, DEC_INIT_DECIMAL128);
set.traps = 0;
- if (FLOAT_WORDS_BIG_ENDIAN)
+ if (WORDS_BIGENDIAN == FLOAT_WORDS_BIG_ENDIAN)
{
- *((uint32_t *) &d128.bytes[0]) = (uint32_t) buf[0];
- *((uint32_t *) &d128.bytes[4]) = (uint32_t) buf[1];
- *((uint32_t *) &d128.bytes[8]) = (uint32_t) buf[2];
- *((uint32_t *) &d128.bytes[12]) = (uint32_t) buf[3];
+ image = buf[0];
+ memcpy (&d128.bytes[0], &image, sizeof (int32_t));
+ image = buf[1];
+ memcpy (&d128.bytes[4], &image, sizeof (int32_t));
+ image = buf[2];
+ memcpy (&d128.bytes[8], &image, sizeof (int32_t));
+ image = buf[3];
+ memcpy (&d128.bytes[12], &image, sizeof (int32_t));
}
else
{
- *((uint32_t *) &d128.bytes[0]) = dfp_byte_swap ((uint32_t) buf[3]);
- *((uint32_t *) &d128.bytes[4]) = dfp_byte_swap ((uint32_t) buf[2]);
- *((uint32_t *) &d128.bytes[8]) = dfp_byte_swap ((uint32_t) buf[1]);
- *((uint32_t *) &d128.bytes[12]) = dfp_byte_swap ((uint32_t) buf[0]);
+ image = buf[3];
+ memcpy (&d128.bytes[0], &image, sizeof (int32_t));
+ image = buf[2];
+ memcpy (&d128.bytes[4], &image, sizeof (int32_t));
+ image = buf[1];
+ memcpy (&d128.bytes[8], &image, sizeof (int32_t));
+ image = buf[0];
+ memcpy (&d128.bytes[12], &image, sizeof (int32_t));
}
decimal128ToNumber (&d128, &dn);
decNumberZero (&dn3);
decNumberRescale (&dn, &dn2, &dn3, &set);
- /* Conver to REAL_VALUE_TYPE and call appropriate conversion
+ /* Convert to REAL_VALUE_TYPE and call appropriate conversion
function. */
decNumberToString (&dn, string);
real_from_string (&to, string);
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