Repository navigation
SIGILL in neon_transpose8 on ARM 32bit? #66
Description
Attempting to run a 512x512 2D test on a 32 bit ARM7 (AllWinner H3). The 1D transforms appear to work correctly.
Sadly I am no ARM assembler expert. Looking up the stack here: https://github.com/anthonix/ffts/blob/master/src/ffts_transpose.c#L48, there is something that looks like it should be used for 32 bit code but is commented out. (neon_transpose4(in, out, w, h);)
Any thoughts. Anyone else working on ARM32?
The vanila C implementation in ffts_transpose.c does work as a fallback
0x000214a6 in neon_transpose8 () at src/neon.s:686
686 vpush {q4-q7}
(gdb) where
#0 0x000214a6 in neon_transpose8 () at src/neon.s:686
#1 0x0001eaf6 in ffts_transpose (in=0xb6bed020, out=0xb6c6e020, w=256, h=256)
at src/ffts_transpose.c:54
#2 0x000199c2 in ffts_execute_nd (p=0x35008, in=0xb6cef020, out=0xb6c6e020)
at src/ffts_nd.c:96
#3 0x00018226 in ffts_execute (p=0x35008, in=0xb6cef020, out=0xb6c6e020)
at src/ffts.c:221
#4 0x00011f2c in try_2d (dimensions=65536) at basicfft.cpp:417
#5 0x0001206c in main (argc=1, argv=0xbefff7c4) at basicfft.cpp:447
Activity
vdgs commentedon Apr 21, 2021
@g40 Did you solve it ?