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Re: [Qemu-devel] [PATCH 5/9] coroutine: add host specific coroutine back
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH 5/9] coroutine: add host specific coroutine backend for 64-bit s390 |
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Date: |
Sun, 5 May 2019 10:10:02 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
On 5/4/19 5:05 AM, Paolo Bonzini wrote:
> + "bras %%r3, 1f\n" /* source PC will be after the BR */ \
> + "1: aghi %%r3, 12\n" /* 4 */ \
> + "stg %%r3, %[SCRATCH](%%r1)\n" /* 6 save switch-back PC */ \
> + "br %%r4\n" /* 2 jump to destination PC */ \
Better as
larl %r3, 2f
stg %r3, SCRATCH(%r1)
br %r4
2:
r~
- [Qemu-devel] [PATCH 0/9] Assembly coroutine backend and x86 CET support, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 1/9] qemugdb: allow adding support for other coroutine backends, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 2/9] qemugdb: allow adding support for other architectures, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 3/9] coroutine: add host specific coroutine backend for 64-bit x86, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 4/9] coroutine: add host specific coroutine backend for 64-bit ARM, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 5/9] coroutine: add host specific coroutine backend for 64-bit s390, Paolo Bonzini, 2019/05/04
- Re: [Qemu-devel] [PATCH 5/9] coroutine: add host specific coroutine backend for 64-bit s390,
Richard Henderson <=
- [Qemu-devel] [PATCH 6/9] configure: add control-flow protection support, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 8/9] tcg/i386: add support for IBT, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 7/9] tcg: add tcg_out_start, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 9/9] linux-user: add IBT support to x86 safe-syscall.S, Paolo Bonzini, 2019/05/04
- [Qemu-devel] [PATCH 10/9] coroutine-asm: add x86 CET shadow stack support, Paolo Bonzini, 2019/05/04
- Re: [Qemu-devel] [PATCH 0/9] Assembly coroutine backend and x86 CET support, Alex Bennée, 2019/05/05