Hi, I've started looking at the source code to figure the best way to write the extension, and I figures out it is best to write it as a new target CPU based on the i386.
I'm adding some instrumentation code in op.c, which should make things a bit slower but hopefully not too slow. There are two points that I'ld like, if possible, to be clarified. 1. The FPU The FPU has a stack defined in CPU.h, which i guess is used for private storage by the FPU itself. What is the flow of data between this stack (stN) and the temporary state variable (FT0 or A0)? Is the stack data dependent on FT0? Will it ever write data to FT0 without using it as an input before? Is there any other exchange with other registers or memory directly? 2. The Soft-MMU I'm having trouble distinguishing where are virtual page addresses translated to physical addresses. I would like to be able to monitor the virtual addresses that are being loaded/stored. The right place to do it seems to be softmmu_header.c or/and softmmu_template.c Thanx, for the help _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
