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> -Original Message-
> From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of
> Gao, Liming
> Sent: Thursday, December 17, 2015 4:29 AM
> To: Ard Biesheuvel; edk2-devel@lists.01.org
> Cc: dw...@infradead.org
> Subject: Re: [edk2
Sent: Thursday, December 17, 2015 4:29 AM
To: Ard Biesheuvel; edk2-devel@lists.01.org
Cc: dw...@infradead.org
Subject: Re: [edk2] [PATCH] MdePkg/BaseLib: do not rely on undefined behavior
in arithmetic shift
Ard:
Have you found other similar cases in EDKII project? Or, it this the only one?
On 17 December 2015 at 10:29, Gao, Liming wrote:
> Ard:
> Have you found other similar cases in EDKII project? Or, it this the only
> one?
>
I found this one as well:
.../PcAtChipsetPkg/Library/SerialIoLib/SerialPortLib.c:488:32: error:
shifting a negative signed value is undefined
[-Werror,-
Ard:
Have you found other similar cases in EDKII project? Or, it this the only one?
Thanks
Liming
-Original Message-
From: Ard Biesheuvel [mailto:ard.biesheu...@linaro.org]
Sent: Wednesday, December 16, 2015 6:49 PM
To: edk2-devel@lists.01.org; Gao, Liming
Cc: dw...@infradead.org; Ard B
The runtime test whether the compiler supports arithmetic shift of
negative signed numbers currently relies on undefined behavior in C,
which means that all bets are off regarding whether the condition
that follows passes or fails, regardless of whether the compiler in
fact supports arithmetic shif
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