FUJITSU MB91F109 FR30 - Manual (Page 422)

398
APPENDIX D Notes on Using Little Endian Areas
Do not allocate double and long double type variables to little endian areas.
[Example of incorrect processing] Transfer of double type data
double big = 1.0; /* Big endian area */
extern int little; /* Little endian area */
little = big; /* Transfer of double type data */
The execution result of the above transfer is rendered incorrect by the transfer of double type
data as follows:
■ Allocating a Stack to a Little Endian Area
If some part or the whole area of a stack is allocated to a little endian area, the result of the
subsequent operation may be rendered invalid.
3f f0 00 00 00 00 00 00
(Big endian area)
(Little endian area)
(Correct result)
3f f0 00 00 00 00 00 00
00 00 00 00 00 00 3f f0