My 32-bit VM:
type : size (bytes)
int : 4
long : 4
long long: 8
double : 8
time_t : 4
float : 4
l double : 12
int8_t : 1 INT8_MAX : 127
int16_t : 2 INT16_MAX : 32767
int32t : 4 INT32_MAX : 2147483647
int64_t : 8 INT64_MAX : 9223372036854775807
uint8_t : 1 UINT8_MAX : 255
uint16_t : 2 UINT16_MAX: 65535
uint32t : 4 UINT32_MAX: 4294967295
uint64_t : 8 UINT64_MAX: 18446744073709551615
It does support 64-bit sizes, weirdly enough time_t is not one of them.