From f2e996383571ba2cb794f9ecf9487a53bd370a0c Mon Sep 17 00:00:00 2001 From: David Monniaux Date: Mon, 29 Apr 2019 07:43:28 +0200 Subject: test for long bitfields --- test/monniaux/bitfields/bitfields_long.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 test/monniaux/bitfields/bitfields_long.c (limited to 'test/monniaux/bitfields') diff --git a/test/monniaux/bitfields/bitfields_long.c b/test/monniaux/bitfields/bitfields_long.c new file mode 100644 index 00000000..93bba8d0 --- /dev/null +++ b/test/monniaux/bitfields/bitfields_long.c @@ -0,0 +1,19 @@ +#include +#include + +#define GET_FIELD_L(x, stop, start) (((x) << (63-(stop))) >> (63-(stop)+(start))) +#define FIELD_MASK(stop, start) ((1ULL<<(stop)) - (1ULL<<(start)) + (1ULL<<(stop))) + +#define SET_FIELD_L(x, stop, start, y) (((x) & ~FIELD_MASK(stop, start)) | ((y << start) & FIELD_MASK(stop, start))) + +uint64_t get_f2(uint64_t x) { + return GET_FIELD_L(x, 47, 16); +} + +uint64_t set_f2(uint64_t x, uint64_t y) { + return SET_FIELD_L(x, 47, 16, y); +} + +int main() { + printf("%lx %lx\n", FIELD_MASK(47, 16), set_f2(0x12345678ABCD1234ULL, 0x11112222ULL)); +} -- cgit