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Re: ARM: VFPv3-D16 vs. VFPv3-D32
- From: Sebastian Huber <sebastian dot huber at embedded-brains dot de>
- To: Richard Earnshaw <rearnsha at arm dot com>
- Cc: Joey Ye <joey dot ye dot cc at gmail dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Date: Thu, 17 Oct 2013 14:46:02 +0200
- Subject: Re: ARM: VFPv3-D16 vs. VFPv3-D32
- Authentication-results: sourceware.org; auth=none
- References: <525F8DFE dot 7050406 at embedded-brains dot de> <CAL0py25cb8Bi0X0QK+g1e4dY-B4orWVodpS1k9-dM5CacYPvOA at mail dot gmail dot com> <525F962E dot 30309 at embedded-brains dot de> <CAL0py26RM_tD2hGv3+6pu_kSizFkbdG=mcfM7wh-0B_y5v5pnQ at mail dot gmail dot com> <525FD6F2 dot 9000809 at arm dot com>
On 2013-10-17 14:24, Richard Earnshaw wrote:
On 17/10/13 08:56, Joey Ye wrote:
>There is no macro to indicate VFP variances. Probably you can check
>CPU variance instead. As I know Cortex-R only support D16.
>
Checking __ARM_ARCH_PROFILE == 'R' would tell you that it's R profile
and therefore only 16 regs.
Thanks for this information. I was not aware that no existing Cortex-R variant
has a D32 VFP unit.
Is the converse true for Cortex-A variants or are there Cortex-A cores with
VFP-D16 and VFP-D32 units?
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Sebastian Huber, embedded brains GmbH
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