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| author | Georg-Johann Lay <avr@gjlay.de> | 2024-12-07 14:40:28 +0100 |
|---|---|---|
| committer | Georg-Johann Lay <avr@gjlay.de> | 2024-12-12 15:02:21 +0100 |
| commit | bc565843ea20a616dd376226416777a4ea1959d6 (patch) | |
| tree | 1e5bdbde329ff635f1a3f321329d48e03c0dcf2f | |
| parent | f8a602ce5394ef7e0c56b48e3bd89f97f0411c45 (diff) | |
| download | gcc-bc565843ea20a616dd376226416777a4ea1959d6.zip gcc-bc565843ea20a616dd376226416777a4ea1959d6.tar.gz gcc-bc565843ea20a616dd376226416777a4ea1959d6.tar.bz2 | |
AVR: Assert minimal required bit width of section_common::flags.
gcc/
* config/avr/avr.cc (avr_ctz): New constexpr function.
(section_common::flags): Assert minimal bit width.
| -rw-r--r-- | gcc/config/avr/avr.cc | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc index 97f5fbe..ef23601 100644 --- a/gcc/config/avr/avr.cc +++ b/gcc/config/avr/avr.cc @@ -237,6 +237,35 @@ int n_avr_fuse_add_executed = 0; static location_t avr_insn_location = UNKNOWN_LOCATION; +/* Similar to ctz_hwi etc, but as constexpr so we can use it in + static_assert. */ +static constexpr int +avr_ctz (uint64_t x) +{ +#define TSTB(n) (x & ((uint64_t) 1 << n)) ? n + return + TSTB (0) : TSTB (1) : TSTB (2) : TSTB (3) : TSTB (4) + : TSTB (5) : TSTB (6) : TSTB (7) : TSTB (8) : TSTB (9) + : TSTB (10) : TSTB (11) : TSTB (12) : TSTB (13) : TSTB (14) + : TSTB (15) : TSTB (16) : TSTB (17) : TSTB (18) : TSTB (19) + : TSTB (20) : TSTB (21) : TSTB (22) : TSTB (23) : TSTB (24) + : TSTB (25) : TSTB (26) : TSTB (27) : TSTB (28) : TSTB (29) + : TSTB (30) : TSTB (31) : TSTB (32) : TSTB (33) : TSTB (34) + : TSTB (35) : TSTB (36) : TSTB (37) : TSTB (38) : TSTB (39) + : TSTB (40) : TSTB (41) : TSTB (42) : TSTB (43) : TSTB (44) + : TSTB (45) : TSTB (46) : TSTB (47) : TSTB (48) : TSTB (49) + : TSTB (50) : TSTB (51) : TSTB (52) : TSTB (53) : TSTB (54) + : TSTB (55) : TSTB (56) : TSTB (57) : TSTB (58) : TSTB (59) + : TSTB (60) : TSTB (61) : TSTB (62) : TSTB (63) + : 64; +#undef TSTB +} + +/* Make sure that there are enough section flags bits. avr allocates 4. */ +static_assert (8 * sizeof (decltype (section_common::flags)) + >= 4u + avr_ctz (SECTION_MACH_DEP), + "section_common::flags is too narrow"); + /* Transform UP into lowercase and write the result to LO. You must provide enough space for LO. Return LO. */ |