/* Decimal floating point support for GDB.
- Copyright 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 Free Software Foundation, Inc.
This file is part of GDB.
They are stored in host byte order. This routine does the conversion if
the target byte order is different. */
static void
-match_endianness (const gdb_byte *from, int len, gdb_byte *to)
+match_endianness (const gdb_byte *from, int len, enum bfd_endian byte_order,
+ gdb_byte *to)
{
int i;
#define OPPOSITE_BYTE_ORDER BFD_ENDIAN_BIG
#endif
- if (gdbarch_byte_order (current_gdbarch) == OPPOSITE_BYTE_ORDER)
+ if (byte_order == OPPOSITE_BYTE_ORDER)
for (i = 0; i < len; i++)
to[i] = from[len - i - 1];
else
{
/* Leave only the error bits in the status flags. */
ctx->status &= DEC_IEEE_854_Invalid_operation;
- error (_("Cannot perform operation: %s"), decContextStatusToString (ctx));
+ error (_("Cannot perform operation: %s"),
+ decContextStatusToString (ctx));
}
}
decimal128ToNumber ((decimal128 *) from, to);
break;
default:
- error (_("Unknown decimal floating point type.\n"));
+ error (_("Unknown decimal floating point type."));
break;
}
}
of the decimal type, 4 bytes for decimal32, 8 bytes for decimal64 and
16 bytes for decimal128. */
void
-decimal_to_string (const gdb_byte *decbytes, int len, char *s)
+decimal_to_string (const gdb_byte *decbytes, int len,
+ enum bfd_endian byte_order, char *s)
{
gdb_byte dec[16];
- match_endianness (decbytes, len, dec);
+ match_endianness (decbytes, len, byte_order, dec);
switch (len)
{
LEN is the length of the decimal type, 4 bytes for decimal32, 8 bytes for
decimal64 and 16 bytes for decimal128. */
int
-decimal_from_string (gdb_byte *decbytes, int len, const char *string)
+decimal_from_string (gdb_byte *decbytes, int len, enum bfd_endian byte_order,
+ const char *string)
{
decContext set;
gdb_byte dec[16];
break;
}
- match_endianness (dec, len, decbytes);
+ match_endianness (dec, len, byte_order, decbytes);
/* Check for errors in the DFP operation. */
decimal_check_errors (&set);
/* Converts a value of an integral type to a decimal float of
specified LEN bytes. */
void
-decimal_from_integral (struct value *from, gdb_byte *to, int len)
+decimal_from_integral (struct value *from,
+ gdb_byte *to, int len, enum bfd_endian byte_order)
{
LONGEST l;
gdb_byte dec[16];
if (TYPE_LENGTH (type) > 4)
/* libdecnumber can convert only 32-bit integers. */
- error (_("Conversion of large integer to a decimal floating type is not supported."));
+ error (_("Conversion of large integer to a "
+ "decimal floating type is not supported."));
l = value_as_long (from);
decNumberFromInt32 (&number, (int) l);
decimal_from_number (&number, dec, len);
- match_endianness (dec, len, to);
+ match_endianness (dec, len, byte_order, to);
}
/* Converts a value of a float type to a decimal float of
This is an ugly way to do the conversion, but libdecnumber does
not offer a direct way to do it. */
void
-decimal_from_floating (struct value *from, gdb_byte *to, int len)
+decimal_from_floating (struct value *from,
+ gdb_byte *to, int len, enum bfd_endian byte_order)
{
char *buffer;
- int ret;
- ret = asprintf (&buffer, "%.30Lg", value_as_double (from));
- if (ret < 0)
- error (_("Error in memory allocation for conversion to decimal float."));
+ buffer = xstrprintf ("%.30" DOUBLEST_PRINT_FORMAT, value_as_double (from));
- decimal_from_string (to, len, buffer);
+ decimal_from_string (to, len, byte_order, buffer);
- free (buffer);
+ xfree (buffer);
}
/* Converts a decimal float of LEN bytes to a double value. */
DOUBLEST
-decimal_to_double (const gdb_byte *from, int len)
+decimal_to_doublest (const gdb_byte *from, int len, enum bfd_endian byte_order)
{
char buffer[MAX_DECIMAL_STRING];
/* This is an ugly way to do the conversion, but libdecnumber does
not offer a direct way to do it. */
- decimal_to_string (from, len, buffer);
+ decimal_to_string (from, len, byte_order, buffer);
return strtod (buffer, NULL);
}
-/* Check if operands have the same size and convert them to the
- biggest of the two if necessary. */
-static int
-promote_decimal (gdb_byte *x, int len_x, gdb_byte *y, int len_y)
-{
- int len_result;
- decNumber number;
-
- if (len_x < len_y)
- {
- decimal_to_number (x, len_x, &number);
- decimal_from_number (&number, x, len_y);
- len_result = len_y;
- }
- else if (len_x > len_y)
- {
- decimal_to_number (y, len_y, &number);
- decimal_from_number (&number, y, len_x);
- len_result = len_x;
- }
- else
- len_result = len_x;
-
- return len_result;
-}
-
-/* Perform operation OP with operands X and Y and store value in RESULT.
- If LEN_X and LEN_Y are not equal, RESULT will have the size of the biggest
- of the two, and LEN_RESULT will be set accordingly. */
+/* Perform operation OP with operands X and Y with sizes LEN_X and LEN_Y
+ and byte orders BYTE_ORDER_X and BYTE_ORDER_Y, and store value in
+ RESULT with size LEN_RESULT and byte order BYTE_ORDER_RESULT. */
void
-decimal_binop (enum exp_opcode op, const gdb_byte *x, int len_x,
- const gdb_byte *y, int len_y, gdb_byte *result, int *len_result)
+decimal_binop (enum exp_opcode op,
+ const gdb_byte *x, int len_x, enum bfd_endian byte_order_x,
+ const gdb_byte *y, int len_y, enum bfd_endian byte_order_y,
+ gdb_byte *result, int len_result,
+ enum bfd_endian byte_order_result)
{
decContext set;
decNumber number1, number2, number3;
gdb_byte dec1[16], dec2[16], dec3[16];
- match_endianness (x, len_x, dec1);
- match_endianness (y, len_y, dec2);
-
- *len_result = promote_decimal (dec1, len_x, dec2, len_y);
-
- /* Both operands are of size *len_result from now on. */
+ match_endianness (x, len_x, byte_order_x, dec1);
+ match_endianness (y, len_y, byte_order_y, dec2);
- decimal_to_number (dec1, *len_result, &number1);
- decimal_to_number (dec2, *len_result, &number2);
+ decimal_to_number (dec1, len_x, &number1);
+ decimal_to_number (dec2, len_y, &number2);
- set_decnumber_context (&set, *len_result);
+ set_decnumber_context (&set, len_result);
switch (op)
{
/* Check for errors in the DFP operation. */
decimal_check_errors (&set);
- decimal_from_number (&number3, dec3, *len_result);
+ decimal_from_number (&number3, dec3, len_result);
- match_endianness (dec3, *len_result, result);
+ match_endianness (dec3, len_result, byte_order_result, result);
}
/* Returns true if X (which is LEN bytes wide) is the number zero. */
int
-decimal_is_zero (const gdb_byte *x, int len)
+decimal_is_zero (const gdb_byte *x, int len, enum bfd_endian byte_order)
{
decNumber number;
gdb_byte dec[16];
- match_endianness (x, len, dec);
+ match_endianness (x, len, byte_order, dec);
decimal_to_number (dec, len, &number);
return decNumberIsZero (&number);
will be -1. If they are equal, then the return value will be 0. If X is
greater than the Y then the return value will be 1. */
int
-decimal_compare (const gdb_byte *x, int len_x, const gdb_byte *y, int len_y)
+decimal_compare (const gdb_byte *x, int len_x, enum bfd_endian byte_order_x,
+ const gdb_byte *y, int len_y, enum bfd_endian byte_order_y)
{
decNumber number1, number2, result;
decContext set;
gdb_byte dec1[16], dec2[16];
int len_result;
- match_endianness (x, len_x, dec1);
- match_endianness (y, len_y, dec2);
-
- len_result = promote_decimal (dec1, len_x, dec2, len_y);
+ match_endianness (x, len_x, byte_order_x, dec1);
+ match_endianness (y, len_y, byte_order_y, dec2);
- decimal_to_number (dec1, len_result, &number1);
- decimal_to_number (dec2, len_result, &number2);
+ decimal_to_number (dec1, len_x, &number1);
+ decimal_to_number (dec2, len_y, &number2);
+ /* Perform the comparison in the larger of the two sizes. */
+ len_result = len_x > len_y ? len_x : len_y;
set_decnumber_context (&set, len_result);
decNumberCompare (&result, &number1, &number2, &set);
/* Convert a decimal value from a decimal type with LEN_FROM bytes to a
decimal type with LEN_TO bytes. */
void
-decimal_convert (const gdb_byte *from, int len_from, gdb_byte *to,
- int len_to)
+decimal_convert (const gdb_byte *from, int len_from,
+ enum bfd_endian byte_order_from, gdb_byte *to, int len_to,
+ enum bfd_endian byte_order_to)
{
decNumber number;
+ gdb_byte dec[16];
+
+ match_endianness (from, len_from, byte_order_from, dec);
+
+ decimal_to_number (dec, len_from, &number);
+ decimal_from_number (&number, dec, len_to);
- decimal_to_number (from, len_from, &number);
- decimal_from_number (&number, to, len_to);
+ match_endianness (dec, len_to, byte_order_to, to);
}