tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
Generic find_first_set_bit can use __builtin_ctz instead of __builtin_ffs
The former gives 0-based indexes, which is what our implementation returns,
making the "- 1" unnecessary.
Change-Id: I172ab5e06695be62e4a18d4fd0415b8314f5dc26
+4
-3
firmware/asm/ffs.c
+4
-3
firmware/asm/ffs.c
···
35
35
if (val == 0)
36
36
return 32;
37
37
38
-
/* __builtin_ffs(l(l)): Returns one plus the index of the least significant
39
-
1-bit of x, or if x is zero, returns zero. */
40
-
return __builtin_ffs(val) - 1;
38
+
/* __builtin_ctz[l[l]]: Returns the number of trailing 0-bits in x,
39
+
* starting at the least significant bit position. If x is 0, the result
40
+
* is undefined. */
41
+
return __builtin_ctz(val);
41
42
}