Re: [Qemu-devel] [PATCH v4 19/32] target-xtensa: implement windowed registers

2011-09-04 Thread Blue Swirl
On Thu, Sep 1, 2011 at 8:45 PM, Max Filippov wrote: > See ISA, 4.7.1 for details. > > Physical registers and currently visible window are separate fields in > CPUEnv. Only current window is accessible to TCG. On operations that > change window base helpers copy current window to and from physical

[Qemu-devel] [PATCH v4 19/32] target-xtensa: implement windowed registers

2011-09-01 Thread Max Filippov
See ISA, 4.7.1 for details. Physical registers and currently visible window are separate fields in CPUEnv. Only current window is accessible to TCG. On operations that change window base helpers copy current window to and from physical registers. Window overflow check described in 4.7.1.3 is in s