2 ms·
> FMUL could only be issued every other cycle, which made scheduling even more annoying. Huh, are you sure? Do you have any documentation that clarifies the ru
by Sesse__ 2y ago
> FMUL could only be issued every other cycle, which made scheduling even more annoying.
Huh, are you sure? Do you have any documentation that clarifies the rules for this? I was under the impression that something like `FMUL st, st(2) ; FXCH st(1), FMUL st, st(2)` would kick off two muls in two cycles, with no stall.
- Tuna-Fish 2y agoAgner Fog's manuals are clear on this. Only the last of FMUL's 3 cycles can overlap with another FMUL. You can immediately overlap with a FADD.