linux-kernel - Re: [PATCH] Fix float to unsigned conversion failure with SPE enabled

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Message-ID: <4CE33256.3030308@windriver.com>
Date:	Wed, 17 Nov 2010 09:39:34 +0800
From:	haishan <shan.hai@...driver.com>
To:	Josh Boyer <jwboyer@...il.com>
CC:	Hai Shan <haishan.bai@...il.com>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] Fix float to unsigned conversion failure with SPE enabled

Josh Boyer wrote:
> On Sat, Nov 13, 2010 at 11:11 PM, Hai Shan <haishan.bai@...il.com> wrote:
>   
>> Fixed the failure on converting minus float to unsigned int with SPE enabled
>>
>> Signed-off-by: Hai Shan <shan.hai@...driver.com>
>>     
>
> You should make sure to send PowerPC patches to linuxppc-dev.
>
>   

Thanks for your suggestion, I will send it to linuxppc-dev.

Regards
Shan Hai

> josh
>
>   
>> ---
>>  arch/powerpc/math-emu/math_efp.c |   17 +++++++++++++----
>>  1 files changed, 13 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/powerpc/math-emu/math_efp.c b/arch/powerpc/math-emu/math_efp.c
>> index 41f4ef3..338a128 100644
>> --- a/arch/powerpc/math-emu/math_efp.c
>> +++ b/arch/powerpc/math-emu/math_efp.c
>> @@ -320,7 +320,9 @@ int do_spe_mathemu(struct pt_regs *regs)
>>                        } else {
>>                                _FP_ROUND_ZERO(1, SB);
>>                        }
>> -                       FP_TO_INT_S(vc.wp[1], SB, 32, ((func & 0x3) != 0));
>> +                       /* SB_s: convert from minus float to unsigned int */
>> +                       FP_TO_INT_S(vc.wp[1], SB, 32,
>> +                                       ((func & 0x3) != 0) || SB_s);
>>                        goto update_regs;
>>
>>                default:
>> @@ -458,7 +460,11 @@ cmp_s:
>>                        } else {
>>                                _FP_ROUND_ZERO(2, DB);
>>                        }
>> -                       FP_TO_INT_D(vc.wp[1], DB, 32, ((func & 0x3) != 0));
>> +                       /* DB_s: convert from minus long double to
>> +                        * unsigned long long
>> +                        */
>> +                       FP_TO_INT_D(vc.wp[1], DB, 32,
>> +                                       ((func & 0x3) != 0) || DB_s);
>>                        goto update_regs;
>>
>>                default:
>> @@ -589,8 +595,11 @@ cmp_d:
>>                                _FP_ROUND_ZERO(1, SB0);
>>                                _FP_ROUND_ZERO(1, SB1);
>>                        }
>> -                       FP_TO_INT_S(vc.wp[0], SB0, 32, ((func & 0x3) != 0));
>> -                       FP_TO_INT_S(vc.wp[1], SB1, 32, ((func & 0x3) != 0));
>> +                       /* SB*_s: convert from minus float to unsigned int */
>> +                       FP_TO_INT_S(vc.wp[0], SB0, 32,
>> +                                       ((func & 0x3) != 0) || SB0_s);
>> +                       FP_TO_INT_S(vc.wp[1], SB1, 32,
>> +                                       ((func & 0x3) != 0) || SB1_s);
>>                        goto update_regs;
>>
>>                default:
>> --
>> 1.7.0.4
>>
>> --
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>>     

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