/* atof_vax.c - turn a Flonum into a VAX floating point number
- Copyright (C) 1987, 1992, 93, 95, 1997, 1998 Free Software Foundation, Inc.
+ Copyright 1987, 1992, 1993, 1995, 1997, 1999, 2000
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
static int what_kind_of_float PARAMS ((int, int *, long *));
static char *atof_vax PARAMS ((char *, int, LITTLENUM_TYPE *));
-/* Precision in LittleNums. */
+/* Precision in LittleNums. */
#define MAX_PRECISION (8)
#define H_PRECISION (8)
#define G_PRECISION (4)
#define D_PRECISION (4)
#define F_PRECISION (2)
-/* Length in LittleNums of guard bits. */
+/* Length in LittleNums of guard bits. */
#define GUARD (2)
int flonum_gen2vax PARAMS ((int format_letter, FLONUM_TYPE * f,
LITTLENUM_TYPE * words));
-/* Number of chars in flonum type 'letter'. */
+/* Number of chars in flonum type 'letter'. */
static int
atof_vax_sizeof (letter)
int letter;
*words = 0x8000; /* Floating Reserved Operand Code */
}
\f
-static int /* 0 means letter is OK. */
+static int /* 0 means letter is OK. */
what_kind_of_float (letter, precisionP, exponent_bitsP)
int letter; /* In: lowercase please. What kind of float? */
- int *precisionP; /* Number of 16-bit words in the float. */
- long *exponent_bitsP; /* Number of exponent bits. */
+ int *precisionP; /* Number of 16-bit words in the float. */
+ long *exponent_bitsP; /* Number of exponent bits. */
{
- int retval; /* 0: OK. */
+ int retval; /* 0: OK. */
retval = 0;
switch (letter)
* *
\***********************************************************************/
-static char * /* Return pointer past text consumed. */
+static char * /* Return pointer past text consumed. */
atof_vax (str, what_kind, words)
- char *str; /* Text to convert to binary. */
+ char *str; /* Text to convert to binary. */
int what_kind; /* 'd', 'f', 'g', 'h' */
- LITTLENUM_TYPE *words; /* Build the binary here. */
+ LITTLENUM_TYPE *words; /* Build the binary here. */
{
FLONUM_TYPE f;
LITTLENUM_TYPE bits[MAX_PRECISION + MAX_PRECISION + GUARD];
- /* Extra bits for zeroed low-order bits. */
+ /* Extra bits for zeroed low-order bits. */
/* The 1st MAX_PRECISION are zeroed, */
- /* the last contain flonum bits. */
+ /* the last contain flonum bits. */
char *return_value;
- int precision; /* Number of 16-bit words in the format. */
+ int precision; /* Number of 16-bit words in the format. */
long exponent_bits;
return_value = str;
if (what_kind_of_float (what_kind, &precision, &exponent_bits))
{
- return_value = NULL; /* We lost. */
+ return_value = NULL; /* We lost. */
make_invalid_floating_point_number (words);
}
/* Use more LittleNums than seems */
/* necessary: the highest flonum may have */
- /* 15 leading 0 bits, so could be useless. */
+ /* 15 leading 0 bits, so could be useless. */
f.high = f.low + precision - 1 + GUARD;
if (atof_generic (&return_value, ".", "eE", &f))
* Out: a vax floating-point bit pattern.
*/
-int /* 0: OK. */
+int /* 0: OK. */
flonum_gen2vax (format_letter, f, words)
- char format_letter; /* One of 'd' 'f' 'g' 'h'. */
+ int format_letter; /* One of 'd' 'f' 'g' 'h'. */
FLONUM_TYPE *f;
- LITTLENUM_TYPE *words; /* Deliver answer here. */
+ LITTLENUM_TYPE *words; /* Deliver answer here. */
{
LITTLENUM_TYPE *lp;
int precision;
long exponent_bits;
- int return_value; /* 0 == OK. */
+ int return_value; /* 0 == OK. */
return_value = what_kind_of_float (format_letter, &precision, &exponent_bits);
{
if (f->low > f->leader)
{
- /* 0.0e0 seen. */
+ /* 0.0e0 seen. */
memset (words, '\0', sizeof (LITTLENUM_TYPE) * precision);
}
else
exponent_skippage++);;
exponent_1 = f->exponent + f->leader + 1 - f->low;
- /* Radix LITTLENUM_RADIX, point just higher than f->leader. */
+ /* Radix LITTLENUM_RADIX, point just higher than f->leader. */
exponent_2 = exponent_1 * LITTLENUM_NUMBER_OF_BITS;
- /* Radix 2. */
+ /* Radix 2. */
exponent_3 = exponent_2 - exponent_skippage;
- /* Forget leading zeros, forget 1st bit. */
+ /* Forget leading zeros, forget 1st bit. */
exponent_4 = exponent_3 + (1 << (exponent_bits - 1));
- /* Offset exponent. */
+ /* Offset exponent. */
if (exponent_4 & ~mask[exponent_bits])
{
{
lp = words;
- /* Word 1. Sign, exponent and perhaps high bits. */
- /* Assume 2's complement integers. */
+ /* Word 1. Sign, exponent and perhaps high bits. */
+ /* Assume 2's complement integers. */
word1 = (((exponent_4 & mask[exponent_bits]) << (15 - exponent_bits))
| ((f->sign == '+') ? 0 : 0x8000)
| next_bits (15 - exponent_bits));
*lp++ = word1;
- /* The rest of the words are just mantissa bits. */
+ /* The rest of the words are just mantissa bits. */
for (; lp < words + precision; lp++)
{
*lp = next_bits (LITTLENUM_NUMBER_OF_BITS);
return (return_value);
} /* flonum_gen2vax() */
-
/* JF this used to be in vax.c but this looks like a better place for it */
/*
* Number of chars we used for the literal.
*/
-#define MAXIMUM_NUMBER_OF_LITTLENUMS (8) /* For .hfloats. */
+#define MAXIMUM_NUMBER_OF_LITTLENUMS (8) /* For .hfloats. */
char *
md_atof (what_statement_type, literalP, sizeP)
};
*sizeP = number_of_chars;
- return kind_of_float ? 0 : _("Bad call to md_atof()");
+ return kind_of_float ? NULL : _("Bad call to md_atof()");
}
/* end of atof-vax.c */
projects / deliverable / binutils-gdb.git / blobdiff