merry merryhime

## aarch64qemu.md

      
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                ecliptik
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              August 16, 2023 11:03
            
              
                Ubuntu 14.04 arm64 Port QEMU Configuration
              
          
    Setting up a Ubuntu 14.04 or Debian 8 (jessie) arm64 VM

This is mainly a notes dump and should be used for reference. This guide assumes:

Ubuntu 14.04 (or Debian 8) hypervisor/host with bridge networking
Knowledge of qemu
Knowledge of debootstrap

Limitations of the qemu-system-aarch64 emulator on x86 include only being able to emulate one CPU and no KVM support.

  
## fma3_codegen.txt
So the general idea with FMA3 is that it's designed to have enough degrees of
freedom so you can just have a more general FMA4 op in the IR and pick the right
FMA3 op *very* late (ideally, after register allocation!).

The generalized FMA op looks like this:

  dst = FMA ±src0, ±src1, ±src2

where at most one of the src's can be a memory operand. This computes
(±src0 * ±src1) ± src2. The two signs for src0 and src1 combine
	So the general idea with FMA3 is that it's designed to have enough degrees of
	freedom so you can just have a more general FMA4 op in the IR and pick the right
	FMA3 op very late (ideally, after register allocation!).

	The generalized FMA op looks like this:

	dst = FMA ±src0, ±src1, ±src2

	where at most one of the src's can be a memory operand. This computes
	(±src0 * ±src1) ± src2. The two signs for src0 and src1 combine