On Mon, 2023-08-14 at 16:44 +0800, Yujie Yang wrote: > I assume we all want: > > (1) -mlasx -mlsx -> enable LSX and LASX > (2) -mlasx -mno-lsx -> disable LSX and LASX > (3) -mno-lsx -mlasx -> enable LSX and LASX
Yes. > Unless we declare -mlsx / -mlasx as driver deferred, AFAIK there is no other > way for > us to know the actual order of appearnce of all -m[no-]l[a]sx options on the > command > line. All we know from GCC's option system would be a final on/off state of > "lsx" > and a final on/off state of "lasx". But x86 does this correct; $ echo __AVX__ + __AVX2__ | LANG= cpp -E -mno-avx -mavx2 # 0 "<stdin>" # 0 "<built-in>" # 0 "<command-line>" # 1 "/usr/include/stdc-predef.h" 1 3 4 # 0 "<command-line>" 2 # 1 "<stdin>" 1 + 1 so there must be a way to handle this... -- Xi Ruoyao <xry...@xry111.site> School of Aerospace Science and Technology, Xidian University
