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2003-09-22 Andrew Cagney <cagney@redhat.com>

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* floatformat.h (struct floatformat): Add field "is_valid".

2003-09-22  Andrew Cagney  <cagney@redhat.com>

	* floatformat.c (floatformat_i387_ext_is_valid): New function.
	(floatformat_always_valid): New function.
	(floatformat_i387_ext): Initialize new "is_valid" field to
	"floatformat_i387_ext_is_valid".
	(floatformat_ieee_single_little): Initialize "is_valid" field to
	floatformat_always_valid.
	(floatformat_ieee_double_big): Ditto.
	(floatformat_ieee_double_little): Ditto.
	(floatformat_ieee_double_little): Ditto.
	(floatformat_ieee_double_littlebyte_bigword): Ditto.
	(floatformat_i960_ext): Ditto.
	(floatformat_m88110_ext): Ditto.
	(floatformat_m88110_harris_ext): Ditto.
	(floatformat_arm_ext_big): Ditto.
	(floatformat_arm_ext_littlebyte_bigword): Ditto.
	(floatformat_ia64_spill_big): Ditto.
	(floatformat_ia64_spill_little): Ditto.
	(floatformat_ia64_quad_big): Ditto.
	(floatformat_ia64_quad_little): Ditto.
	(floatformat_ia64_quad_little): Ditto.
	(floatformat_is_valid): Call "is_valid".
This commit is contained in:
Andrew Cagney 2003-09-22 17:41:02 +00:00
parent b222a67f1f
commit 5324d1855a
4 changed files with 106 additions and 47 deletions
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6
include/ChangeLog
View File

@ -1,8 +1,12 @@
2003-09-22 Andrew Cagney <cagney@redhat.com>
* floatformat.h (struct floatformat): Add field "is_valid".
2003-09-15 Andrew Cagney <cagney@redhat.com>
* floatformat.h (floatformat_to_double): Make input buffer constant.
(floatformat_from_double, floatformat_is_valid): Ditto.
2003-09-15 Andrew Cagney <cagney@redhat.com>
* floatformat.h (struct floatformat): Make "exp_bias" signed.

3
include/floatformat.h
View File

@ -80,6 +80,9 @@ struct floatformat
/* Internal name for debugging. */
const char *name;
/* Validator method. */
int (*is_valid) PARAMS ((const struct floatformat *fmt, const char *from));
};
/* floatformats for IEEE single and double, big and little endian. */

24
libiberty/ChangeLog
View File

@ -1,3 +1,27 @@
2003-09-22 Andrew Cagney <cagney@redhat.com>
* floatformat.c (floatformat_i387_ext_is_valid): New function.
(floatformat_always_valid): New function.
(floatformat_i387_ext): Initialize new "is_valid" field to
"floatformat_i387_ext_is_valid".
(floatformat_ieee_single_little): Initialize "is_valid" field to
floatformat_always_valid.
(floatformat_ieee_double_big): Ditto.
(floatformat_ieee_double_little): Ditto.
(floatformat_ieee_double_little): Ditto.
(floatformat_ieee_double_littlebyte_bigword): Ditto.
(floatformat_i960_ext): Ditto.
(floatformat_m88110_ext): Ditto.
(floatformat_m88110_harris_ext): Ditto.
(floatformat_arm_ext_big): Ditto.
(floatformat_arm_ext_littlebyte_bigword): Ditto.
(floatformat_ia64_spill_big): Ditto.
(floatformat_ia64_spill_little): Ditto.
(floatformat_ia64_quad_big): Ditto.
(floatformat_ia64_quad_little): Ditto.
(floatformat_ia64_quad_little): Ditto.
(floatformat_is_valid): Call "is_valid".
2003-09-15 Andrew Cagney <cagney@redhat.com>
* floatformat.c (get_field): Make "data" constant.

120
libiberty/floatformat.c
View File

@ -29,6 +29,22 @@ extern char *memcpy ();
extern char *memset ();
#endif
static unsigned long get_field PARAMS ((const unsigned char *,
enum floatformat_byteorders,
unsigned int,
unsigned int,
unsigned int));
static int floatformat_always_valid PARAMS ((const struct floatformat *fmt,
const char *from));
static int
floatformat_always_valid (fmt, from)
const struct floatformat *fmt;
const char *from;
{
return 1;
}
/* The odds that CHAR_BIT will be anything but 8 are low enough that I'm not
going to bother with trying to muck around with whether it is defined in
a system header, what we do if not, etc. */
@ -39,25 +55,29 @@ const struct floatformat floatformat_ieee_single_big =
{
floatformat_big, 32, 0, 1, 8, 127, 255, 9, 23,
floatformat_intbit_no,
"floatformat_ieee_single_big"
"floatformat_ieee_single_big",
floatformat_always_valid
};
const struct floatformat floatformat_ieee_single_little =
{
floatformat_little, 32, 0, 1, 8, 127, 255, 9, 23,
floatformat_intbit_no,
"floatformat_ieee_single_little"
"floatformat_ieee_single_little",
floatformat_always_valid
};
const struct floatformat floatformat_ieee_double_big =
{
floatformat_big, 64, 0, 1, 11, 1023, 2047, 12, 52,
floatformat_intbit_no,
"floatformat_ieee_double_big"
"floatformat_ieee_double_big",
floatformat_always_valid
};
const struct floatformat floatformat_ieee_double_little =
{
floatformat_little, 64, 0, 1, 11, 1023, 2047, 12, 52,
floatformat_intbit_no,
"floatformat_ieee_double_little"
"floatformat_ieee_double_little",
floatformat_always_valid
};
/* floatformat for IEEE double, little endian byte order, with big endian word
@ -67,34 +87,64 @@ const struct floatformat floatformat_ieee_double_littlebyte_bigword =
{
floatformat_littlebyte_bigword, 64, 0, 1, 11, 1023, 2047, 12, 52,
floatformat_intbit_no,
"floatformat_ieee_double_littlebyte_bigword"
"floatformat_ieee_double_littlebyte_bigword",
floatformat_always_valid
};
static int floatformat_i387_ext_is_valid PARAMS ((const struct floatformat *fmt, const char *from));
static int
floatformat_i387_ext_is_valid (fmt, from)
const struct floatformat *fmt;
const char *from;
{
/* In the i387 double-extended format, if the exponent is all ones,
then the integer bit must be set. If the exponent is neither 0
nor ~0, the intbit must also be set. Only if the exponent is
zero can it be zero, and then it must be zero. */
unsigned long exponent, int_bit;
const unsigned char *ufrom = (const unsigned char *) from;
exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize,
fmt->exp_start, fmt->exp_len);
int_bit = get_field (ufrom, fmt->byteorder, fmt->totalsize,
fmt->man_start, 1);
if ((exponent == 0) != (int_bit == 0))
return 0;
else
return 1;
}
const struct floatformat floatformat_i387_ext =
{
floatformat_little, 80, 0, 1, 15, 0x3fff, 0x7fff, 16, 64,
floatformat_intbit_yes,
"floatformat_i387_ext"
"floatformat_i387_ext",
floatformat_i387_ext_is_valid
};
const struct floatformat floatformat_m68881_ext =
{
/* Note that the bits from 16 to 31 are unused. */
floatformat_big, 96, 0, 1, 15, 0x3fff, 0x7fff, 32, 64,
floatformat_intbit_yes,
"floatformat_m68881_ext"
"floatformat_m68881_ext",
floatformat_always_valid
};
const struct floatformat floatformat_i960_ext =
{
/* Note that the bits from 0 to 15 are unused. */
floatformat_little, 96, 16, 17, 15, 0x3fff, 0x7fff, 32, 64,
floatformat_intbit_yes,
"floatformat_i960_ext"
"floatformat_i960_ext",
floatformat_always_valid
};
const struct floatformat floatformat_m88110_ext =
{
floatformat_big, 80, 0, 1, 15, 0x3fff, 0x7fff, 16, 64,
floatformat_intbit_yes,
"floatformat_m88110_ext"
"floatformat_m88110_ext",
floatformat_always_valid
};
const struct floatformat floatformat_m88110_harris_ext =
{
@ -102,53 +152,54 @@ const struct floatformat floatformat_m88110_harris_ext =
double, and the last 64 bits are wasted. */
floatformat_big,128, 0, 1, 11, 0x3ff, 0x7ff, 12, 52,
floatformat_intbit_no,
"floatformat_m88110_ext_harris"
"floatformat_m88110_ext_harris",
floatformat_always_valid
};
const struct floatformat floatformat_arm_ext_big =
{
/* Bits 1 to 16 are unused. */
floatformat_big, 96, 0, 17, 15, 0x3fff, 0x7fff, 32, 64,
floatformat_intbit_yes,
"floatformat_arm_ext_big"
"floatformat_arm_ext_big",
floatformat_always_valid
};
const struct floatformat floatformat_arm_ext_littlebyte_bigword =
{
/* Bits 1 to 16 are unused. */
floatformat_littlebyte_bigword, 96, 0, 17, 15, 0x3fff, 0x7fff, 32, 64,
floatformat_intbit_yes,
"floatformat_arm_ext_littlebyte_bigword"
"floatformat_arm_ext_littlebyte_bigword",
floatformat_always_valid
};
const struct floatformat floatformat_ia64_spill_big =
{
floatformat_big, 128, 0, 1, 17, 65535, 0x1ffff, 18, 64,
floatformat_intbit_yes,
"floatformat_ia64_spill_big"
"floatformat_ia64_spill_big",
floatformat_always_valid
};
const struct floatformat floatformat_ia64_spill_little =
{
floatformat_little, 128, 0, 1, 17, 65535, 0x1ffff, 18, 64,
floatformat_intbit_yes,
"floatformat_ia64_spill_little"
"floatformat_ia64_spill_little",
floatformat_always_valid
};
const struct floatformat floatformat_ia64_quad_big =
{
floatformat_big, 128, 0, 1, 15, 16383, 0x7fff, 16, 112,
floatformat_intbit_no,
"floatformat_ia64_quad_big"
"floatformat_ia64_quad_big",
floatformat_always_valid
};
const struct floatformat floatformat_ia64_quad_little =
{
floatformat_little, 128, 0, 1, 15, 16383, 0x7fff, 16, 112,
floatformat_intbit_no,
"floatformat_ia64_quad_little"
"floatformat_ia64_quad_little",
floatformat_always_valid
};
static unsigned long get_field PARAMS ((const unsigned char *,
enum floatformat_byteorders,
unsigned int,
unsigned int,
unsigned int));
/* Extract a field which starts at START and is LEN bits long. DATA and
TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
static unsigned long
@ -411,30 +462,7 @@ floatformat_is_valid (fmt, from)
const struct floatformat *fmt;
const char *from;
{
if (fmt == &floatformat_i387_ext)
{
/* In the i387 double-extended format, if the exponent is all
ones, then the integer bit must be set. If the exponent
is neither 0 nor ~0, the intbit must also be set. Only
if the exponent is zero can it be zero, and then it must
be zero. */
unsigned long exponent, int_bit;
const unsigned char *ufrom = (const unsigned char *) from;
exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize,
fmt->exp_start, fmt->exp_len);
int_bit = get_field (ufrom, fmt->byteorder, fmt->totalsize,
fmt->man_start, 1);
if ((exponent == 0) != (int_bit == 0))
return 0;
else
return 1;
}
/* Other formats with invalid representations should be added
here. */
return 1;
return fmt->is_valid (fmt, from);
}