From: Amit kumar <akamit91@hotmail.com>
To: "edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Subject: SIMD Instruction supported in UEFI?
Date: Wed, 8 Mar 2017 15:09:37 +0000 [thread overview]
Message-ID: <BN6PR11MB1811383D1C3A59ABF17D6119DC2E0@BN6PR11MB1811.namprd11.prod.outlook.com> (raw)
Hi ;
I have written a UEFI app in ASM which runs XOR on a block of data using SIMD instructions ("PXOR") in UEFI environment.
It takes around 2 Seconds to run this code, but when i use normal C XOR operator ("^") it takes 1 Seconds.
Is there something wrong ? I mean SIMD instructions must be giving me better performance(my expectation);
But when i do same experiment in Windows environment SIMD code ( _mm_xor_si128 ) gives me 9 times better performance than normal XOR instruction.
Have i missed something?.
Regards
Amit Kumar
next reply other threads:[~2017-03-08 15:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-08 15:09 Amit kumar [this message]
2017-03-08 23:21 ` SIMD Instruction supported in UEFI? Ken Taylor
2017-03-09 6:18 ` Amit kumar
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