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Commit c50a0116 by Zack Weinberg
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Bug 14610 

	Bug 14610
	* Makefile.in (min-insn-modes.o): Correct dependencies.
	* real.c (encode_ieee_extended, decode_ieee_extended): Always
	produce/consume 12-byte little-endian Intel format.
	(encode_ieee_extended_128, decode_ieee_extended_128): Delete.
	(encode_ieee_extended_motorola, decode_ieee_extended_motorola)
	(encode_ieee_extended_intel_96, decode_ieee_extended_intel_96)
	(encode_ieee_extended_intel_128, decode_ieee_extended_intel_128):
	New functions which convert between 12-byte little-endian Intel
	format and the desired format.
	(ieee_extended_motorola_format, ieee_extended_intel_96_round_53_format)
	(ieee_extended_intel_96_format, ieee_extended_intel_128_format):
	Update.
testsuite:
	* gcc.dg/ia64-float80-1.c, gcc.dg/ia64-float80-2.c: New testcases.

From-SVN: r83295
parent 42eb30b5
Showing with 166 additions and 39 deletions
gcc/ChangeLog
2004-06-17 Zack Weinberg <zack@codesourcery.com>
Bug 14610
* Makefile.in (min-insn-modes.o): Correct dependencies.
* real.c (encode_ieee_extended, decode_ieee_extended): Always
produce/consume 12-byte little-endian Intel format.
(encode_ieee_extended_128, decode_ieee_extended_128): Delete.
(encode_ieee_extended_motorola, decode_ieee_extended_motorola)
(encode_ieee_extended_intel_96, decode_ieee_extended_intel_96)
(encode_ieee_extended_intel_128, decode_ieee_extended_intel_128):
New functions which convert between 12-byte little-endian Intel
format and the desired format.
(ieee_extended_motorola_format, ieee_extended_intel_96_round_53_format)
(ieee_extended_intel_96_format, ieee_extended_intel_128_format):
Update.
2004-06-17 Zack Weinberg <zack@codesourcery.com>
* expmed.c (expand_mult_const): In sanity check, compare only
the bits of val and val_so_far that are significant in the
result mode.
......@@ -43,7 +59,7 @@
* tree-inline.c: Correct comment about this file's purpose.
* tree-optimize.c: Likewise.
* tree-tailcall.c: Likewise.
* tree-alias-ander.h: Add standard top-of-file comment.
* tree-alias-common.h: Likewise.
* tree-alias-type.h: Likewise.
......
gcc/Makefile.in
......@@ -2561,7 +2561,7 @@ $(BUILD_PREFIX_1)ggc-none.o: ggc-none.c $(BCONFIG_H) coretypes.h $(GTM_H) $(SYST
sed -e 's/config[.]h/bconfig.h/' $(srcdir)/ggc-none.c > $(BUILD_PREFIX)ggc-none.c
$(CC_FOR_BUILD) -c $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) $(INCLUDES) $(BUILD_PREFIX)ggc-none.c $(OUTPUT_OPTION)
min-insn-modes.o: insn-modes.c $(BCONFIG_H) $(SYSTEM_H) $(MACHMODE_H)
min-insn-modes.o: min-insn-modes.c $(BCONFIG_H) $(SYSTEM_H) $(MACHMODE_H)
$(CC_FOR_BUILD) -c $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) $(INCLUDES) \
min-insn-modes.c $(OUTPUT_OPTION)
......
gcc/real.c
......@@ -2912,20 +2912,14 @@ const struct real_format mips_double_format =
};
/* IEEE extended double precision format. This comes in three
flavors: Intel's as a 12 byte image, Intel's as a 16 byte image,
and Motorola's. */
static void encode_ieee_extended (const struct real_format *fmt,
long *, const REAL_VALUE_TYPE *);
static void decode_ieee_extended (const struct real_format *,
REAL_VALUE_TYPE *, const long *);
static void encode_ieee_extended_128 (const struct real_format *fmt,
long *, const REAL_VALUE_TYPE *);
static void decode_ieee_extended_128 (const struct real_format *,
REAL_VALUE_TYPE *, const long *);
/* IEEE extended real format. This comes in three flavors: Intel's as
a 12 byte image, Intel's as a 16 byte image, and Motorola's. Intel
12- and 16-byte images may be big- or little endian; Motorola's is
always big endian. */
/* Helper subroutine which converts from the internal format to the
12-byte little-endian Intel format. Functions below adjust this
for the other possible formats. */
static void
encode_ieee_extended (const struct real_format *fmt, long *buf,
const REAL_VALUE_TYPE *r)
......@@ -3033,20 +3027,65 @@ encode_ieee_extended (const struct real_format *fmt, long *buf,
abort ();
}
buf[0] = sig_lo, buf[1] = sig_hi, buf[2] = image_hi;
}
/* Convert from the internal format to the 12-byte Motorola format
for an IEEE extended real. */
static void
encode_ieee_extended_motorola (const struct real_format *fmt, long *buf,
const REAL_VALUE_TYPE *r)
{
long intermed[3];
encode_ieee_extended (fmt, intermed, r);
/* Motorola chips are assumed always to be big-endian. Also, the
padding in a Motorola extended real goes between the exponent and
the mantissa. At this point the mantissa is entirely within
elements 0 and 1 of intermed, and the exponent entirely within
element 2, so all we have to do is swap the order around, and
shift element 2 left 16 bits. */
buf[0] = intermed[2] << 16;
buf[1] = intermed[1];
buf[2] = intermed[0];
}
/* Convert from the internal format to the 12-byte Intel format for
an IEEE extended real. */
static void
encode_ieee_extended_intel_96 (const struct real_format *fmt, long *buf,
const REAL_VALUE_TYPE *r)
{
if (FLOAT_WORDS_BIG_ENDIAN)
buf[0] = image_hi << 16, buf[1] = sig_hi, buf[2] = sig_lo;
{
/* All the padding in an Intel-format extended real goes at the high
end, which in this case is after the mantissa, not the exponent.
Therefore we must shift everything down 16 bits. */
long intermed[3];
encode_ieee_extended (fmt, intermed, r);
buf[0] = ((intermed[2] << 16) | ((unsigned long)(intermed[1] & 0xFFFF0000) >> 16));
buf[1] = ((intermed[1] << 16) | ((unsigned long)(intermed[0] & 0xFFFF0000) >> 16));
buf[2] = (intermed[0] << 16);
}
else
buf[0] = sig_lo, buf[1] = sig_hi, buf[2] = image_hi;
/* encode_ieee_extended produces what we want directly. */
encode_ieee_extended (fmt, buf, r);
}
/* Convert from the internal format to the 16-byte Intel format for
an IEEE extended real. */
static void
encode_ieee_extended_128 (const struct real_format *fmt, long *buf,
const REAL_VALUE_TYPE *r)
encode_ieee_extended_intel_128 (const struct real_format *fmt, long *buf,
const REAL_VALUE_TYPE *r)
{
buf[3 * !FLOAT_WORDS_BIG_ENDIAN] = 0;
encode_ieee_extended (fmt, buf+!!FLOAT_WORDS_BIG_ENDIAN, r);
/* All the padding in an Intel-format extended real goes at the high end. */
encode_ieee_extended_intel_96 (fmt, buf, r);
buf[3] = 0;
}
/* As above, we have a helper function which converts from 12-byte
little-endian Intel format to internal format. Functions below
adjust for the other possible formats. */
static void
decode_ieee_extended (const struct real_format *fmt, REAL_VALUE_TYPE *r,
const long *buf)
......@@ -3055,10 +3094,7 @@ decode_ieee_extended (const struct real_format *fmt, REAL_VALUE_TYPE *r,
bool sign;
int exp;
if (FLOAT_WORDS_BIG_ENDIAN)
image_hi = buf[0] >> 16, sig_hi = buf[1], sig_lo = buf[2];
else
sig_lo = buf[0], sig_hi = buf[1], image_hi = buf[2];
sig_lo = buf[0], sig_hi = buf[1], image_hi = buf[2];
sig_lo &= 0xffffffff;
sig_hi &= 0xffffffff;
image_hi &= 0xffffffff;
......@@ -3135,17 +3171,62 @@ decode_ieee_extended (const struct real_format *fmt, REAL_VALUE_TYPE *r,
}
}
/* Convert from the internal format to the 12-byte Motorola format
for an IEEE extended real. */
static void
decode_ieee_extended_motorola (const struct real_format *fmt, REAL_VALUE_TYPE *r,
const long *buf)
{
long intermed[3];
/* Motorola chips are assumed always to be big-endian. Also, the
padding in a Motorola extended real goes between the exponent and
the mantissa; remove it. */
intermed[0] = buf[2];
intermed[1] = buf[1];
intermed[2] = (unsigned long)buf[0] >> 16;
decode_ieee_extended (fmt, r, intermed);
}
/* Convert from the internal format to the 12-byte Intel format for
an IEEE extended real. */
static void
decode_ieee_extended_intel_96 (const struct real_format *fmt, REAL_VALUE_TYPE *r,
const long *buf)
{
if (FLOAT_WORDS_BIG_ENDIAN)
{
/* All the padding in an Intel-format extended real goes at the high
end, which in this case is after the mantissa, not the exponent.
Therefore we must shift everything up 16 bits. */
long intermed[3];
intermed[0] = (((unsigned long)buf[2] >> 16) | (buf[1] << 16));
intermed[1] = (((unsigned long)buf[1] >> 16) | (buf[0] << 16));
intermed[2] = ((unsigned long)buf[0] >> 16);
decode_ieee_extended (fmt, r, intermed);
}
else
/* decode_ieee_extended produces what we want directly. */
decode_ieee_extended (fmt, r, buf);
}
/* Convert from the internal format to the 16-byte Intel format for
an IEEE extended real. */
static void
decode_ieee_extended_128 (const struct real_format *fmt, REAL_VALUE_TYPE *r,
const long *buf)
decode_ieee_extended_intel_128 (const struct real_format *fmt, REAL_VALUE_TYPE *r,
const long *buf)
{
decode_ieee_extended (fmt, r, buf+!!FLOAT_WORDS_BIG_ENDIAN);
/* All the padding in an Intel-format extended real goes at the high end. */
decode_ieee_extended_intel_96 (fmt, r, buf);
}
const struct real_format ieee_extended_motorola_format =
{
encode_ieee_extended,
decode_ieee_extended,
encode_ieee_extended_motorola,
decode_ieee_extended_motorola,
2,
1,
64,
......@@ -3162,8 +3243,8 @@ const struct real_format ieee_extended_motorola_format =
const struct real_format ieee_extended_intel_96_format =
{
encode_ieee_extended,
decode_ieee_extended,
encode_ieee_extended_intel_96,
decode_ieee_extended_intel_96,
2,
1,
64,
......@@ -3180,8 +3261,8 @@ const struct real_format ieee_extended_intel_96_format =
const struct real_format ieee_extended_intel_128_format =
{
encode_ieee_extended_128,
decode_ieee_extended_128,
encode_ieee_extended_intel_128,
decode_ieee_extended_intel_128,
2,
1,
64,
......@@ -3200,8 +3281,8 @@ const struct real_format ieee_extended_intel_128_format =
to 53 bits instead of 64, e.g. FreeBSD. */
const struct real_format ieee_extended_intel_96_round_53_format =
{
encode_ieee_extended,
decode_ieee_extended,
encode_ieee_extended_intel_96,
decode_ieee_extended_intel_96,
2,
1,
53,
......
gcc/testsuite/ChangeLog
2004-06-17 Zack Weinberg <zack@codesourcery.com>
Bug 14610
* gcc.dg/ia64-float80-1.c, gcc.dg/ia64-float80-2.c: New testcases.
2004-06-15 Richard Henderson <rth@redhat.com>
* gcc.dg/20001116-1.c: Move expected warning line.
......@@ -91,7 +96,7 @@
PR fortran/14957
* gfortran.fortran-torture/execute/stack_varsize.f90: Correct
syntax errors in end statements of contained subroutines.
syntax errors in end statements of contained subroutines.
2004-06-12 Tobias Schlueter <tobias.schlueter@physik.uni-muenchen.de>
......@@ -192,7 +197,7 @@
2004-06-09 Bud Davis <bdavis9659@comcast.net>
PR gfortran/15755
PR gfortran/15755
* gfortran.fortran-torture/execute/backspace.c : New test.
2004-06-09 Paul Brook <paul@codesourcery.com>
......
gcc/testsuite/gcc.dg/ia64-float80-1.c 0 → 100644
/* Bug 14610 */
/* { dg-do run { target ia64-*-* } } */
extern void abort(void);
volatile __float80 x = 30.0;
int main(void)
{
double d = x;
if (d != 30.0) abort ();
return 0;
}
gcc/testsuite/gcc.dg/ia64-float80-2.c 0 → 100644
/* Bug 14610 */
/* { dg-do run { target ia64-*-* } } */
/* { dg-options "-minline-int-divide-max-throughput" } */
extern void abort(void);
volatile int j = 30;
int main(void)
{
if (29 % j != 29) abort();
if (30 % j != 0) abort();
return 0;
}
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