On Wed, Apr 12, 2023 at 01:31:46PM +0800, Jiufu Guo wrote: > I understand that QP insns (e.g. xscmpexpqp) is valid if the system > meets ISA3.0, no matter BE/LE, 32-bit/64-bit. > I think option -mfloat128-hardware is designed for QP insns. > > While there is one issue, on BE machine, when compiling with options > "-mfloat128-hardware -m32", an error message is generated: > "error: '%<-mfloat128-hardware%>' requires '-m64'" > > (I'm wondering if we need to relax this limitation.)
In the past, the machine independent portion of the compiler demanded that for scalar mode, there be an integer mode of the same size, since sometimes moves are converted to using an int RTL mode. Since we don't have TImode support in 32-bit, you would get various errors because something tried to do a TImode move for KFmode types, and the TImode wasn't available. If somebody wants to verify that this now works on 32-bit and/or implements TImode on 32-bit, then we can relax the restriction. -- Michael Meissner, IBM PO Box 98, Ayer, Massachusetts, USA, 01432 email: meiss...@linux.ibm.com
