search for: tsubs

..."\tldr %4, [%0], #4 \n" - "\tcmps %4, %1 \n" + "\tcmp %4, %1 \n" "\tmovgt %1, %4 \n" - "\tcmps %4, %3 \n" + "\tcmp %4, %3 \n" "\tmovlt %3, %4 \n" "\tsubs %2, %2, #1 \n" -- 1.8.3.4 (Apple Git-47)

I have found that filter_mem2 fixed point does not match the inlined assembly version for arm4. Looking closer there appears to be an off by one error. It occurs when setting the value of mem at the end of the inner loop. In the C fixed point version this is done with a subtract. In the arm4 version instead of multiplying den by yi, it is multipled by nyi and then an add is done. This

Alexander Chemeris a ?crit : > Ok, if I comment out inclusion of "filters_arm4.h" (or comment out its > only overridden function - normalize16()) it works fine. > > Also it works fine if I use -O0 for compilation. Specifying -O1 or -O2 lead > to segfault (if "filters_arm4.h" is included, sure). OK, so either I screwed up the alignment/constraints in the

..."\taddss 36(%0), %%xmm2\n" + "\tmovss 40(%3), %%xmm4\n" + "\tmulss %%xmm0, %%xmm4\n" + "\tmovss 40(%4), %%xmm5\n" + "\tmulss %%xmm1, %%xmm5\n" + "\tsubss %%xmm3, %%xmm2\n" + "\tmovss %%xmm2, 32(%0)\n" + "\tsubss %%xmm5, %%xmm4\n" + "\tmovss %%xmm4, 36(%0)\n" + + "\tmovss 4(%1), %%xmm0\n" + "\tmovss (%0), %%xmm1\...