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Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for a
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64 |
Date: |
Tue, 28 May 2013 07:52:23 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
On 05/28/2013 12:17 AM, Claudio Fontana wrote:
>> > if (type == TCG_TYPE_I32) {
>> > value = (uint32_t)value;
>> > ext = 0;
>> > } else if (value <= 0xffffffff) {
>> > ext = 0;
>> > } else {
>> > ext = 0x80000000;
>> > }
> The check for type is probably unnecessary, since we don't gain anything (we
> still have to check something once), so I'd rather use a uint64_t parameter
> and then just check for value < 0xffffffff.
>
The check for type is necessary, because we don't guarantee that the high bits
of value are zero, sign-extended, or indeed garbage, for TYPE_I32.
r~
- Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, (continued)
- Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Claudio Fontana, 2013/05/27
- Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Richard Henderson, 2013/05/27
- Re: [Qemu-devel] [PATCH 3/3] tcg/aarch64: implement new TCG target for aarch64, Laurent Desnogues, 2013/05/27
- Re: [Qemu-devel] [PATCH 3/3] tcg/aarch64: implement new TCG target for aarch64, Claudio Fontana, 2013/05/28
- Re: [Qemu-devel] [PATCH 3/3] tcg/aarch64: implement new TCG target for aarch64, Laurent Desnogues, 2013/05/28
- Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Claudio Fontana, 2013/05/28
- Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64,
Richard Henderson <=
Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Peter Maydell, 2013/05/23
Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Laurent Desnogues, 2013/05/27
Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64, Laurent Desnogues, 2013/05/28