Align compiler flags of SOF Zephyr build with the build SOF XTOS
and use -fstrict-overflow.
With -fno-strict-overflow, some versions of XCC compiler (e.g. xt-xcc
12.0.8) always emit a "bltu" instruction to check for overflow in loops
like:
unsigned int n;
for(n = 0; n < 1024; n++)
do_arithmetic();
With "-fno-strict-overflow", you'll have:
18: 068076 loop a0, 22 <dummy_dspload+0x22>
1b: 445a add.n a4, a4, a5
1d: 551b addi.n a5, a5, 1
1f: 023657 bltu a6, a5, 25 <dummy_dspload+0x25>
22: fffc86 j 18 <dummy_dspload+0x18>
With "-fstrict-overflow":
16: 038476 loop a4, 1d <dummy_dspload+0x1d>
19: 223a add.n a2, a2, a3
1b: 331b addi.n a3, a3, 1
As this is a common pattern in audio DSP code, change the default
for SOF builds to -fstrict-overflow.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
The inner loops of SOF audio algorithms benefit from
compiler optimizations. On Intel cAVS platforms, it was noted
zero-overhead loops ("loop" family of instructions) is not
used for fixed-size inner loops when using -Os (optimize for
size) and the XCC xtensa toolchain.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Allow SMP processing for SOF on ADSP. Note, that after this
SOF will build with SMP support enabled on all cAVS versions,
but secondary cores will remain disabled unless an SMP
topology is loaded by the host.
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Move samples under subsys/audio. We still do not have this as a
subsystem, but it is on the horizon.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
