/* Decimal floating point support for GDB.
- Copyright 2007, 2008 Free Software Foundation, Inc.
+ Copyright 2007, 2008, 2009 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
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];
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;
buffer = xstrprintf ("%.30" DOUBLEST_PRINT_FORMAT, value_as_double (from));
- decimal_from_string (to, len, buffer);
+ decimal_from_string (to, len, byte_order, buffer);
xfree (buffer);
}
/* Converts a decimal float of LEN bytes to a double value. */
DOUBLEST
-decimal_to_doublest (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);
+ match_endianness (x, len_x, byte_order_x, dec1);
+ match_endianness (y, len_y, byte_order_y, dec2);
- *len_result = promote_decimal (dec1, len_x, dec2, len_y);
+ decimal_to_number (dec1, len_x, &number1);
+ decimal_to_number (dec2, len_y, &number2);
- /* Both operands are of size *len_result from now on. */
-
- decimal_to_number (dec1, *len_result, &number1);
- decimal_to_number (dec2, *len_result, &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, dec);
+ match_endianness (from, len_from, byte_order_from, dec);
decimal_to_number (dec, len_from, &number);
decimal_from_number (&number, dec, len_to);
- match_endianness (dec, len_to, to);
+ match_endianness (dec, len_to, byte_order_to, to);
}
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