65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* Copyright (C) 2017-2018 ARM Limited */
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/*
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* For use by other UAPI headers only.
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* Do not make direct use of header or its definitions.
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*/
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#ifndef __ASM_SVE_CONTEXT_H
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#define __ASM_SVE_CONTEXT_H
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#include <linux/types.h>
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#define __SVE_VQ_BYTES 16 /* number of bytes per quadword */
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/*
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* Yes, __SVE_VQ_MAX is 512 QUADWORDS.
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*
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* To help ensure forward portability, this is much larger than the
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* current maximum value defined by the SVE architecture. While arrays
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* or static allocations can be sized based on this value, watch out!
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* It will waste a surprisingly large amount of memory.
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*
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* Dynamic sizing based on the actual runtime vector length is likely to
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* be preferable for most purposes.
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*/
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#define __SVE_VQ_MIN 1
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#define __SVE_VQ_MAX 512
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#define __SVE_VL_MIN (__SVE_VQ_MIN * __SVE_VQ_BYTES)
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#define __SVE_VL_MAX (__SVE_VQ_MAX * __SVE_VQ_BYTES)
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#define __SVE_NUM_ZREGS 32
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#define __SVE_NUM_PREGS 16
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#define __sve_vl_valid(vl) \
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((vl) % __SVE_VQ_BYTES == 0 && \
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(vl) >= __SVE_VL_MIN && \
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(vl) <= __SVE_VL_MAX)
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#define __sve_vq_from_vl(vl) ((vl) / __SVE_VQ_BYTES)
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#define __sve_vl_from_vq(vq) ((vq) * __SVE_VQ_BYTES)
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#define __SVE_ZREG_SIZE(vq) ((__u32)(vq) * __SVE_VQ_BYTES)
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#define __SVE_PREG_SIZE(vq) ((__u32)(vq) * (__SVE_VQ_BYTES / 8))
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#define __SVE_FFR_SIZE(vq) __SVE_PREG_SIZE(vq)
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#define __SVE_ZREGS_OFFSET 0
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#define __SVE_ZREG_OFFSET(vq, n) \
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(__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n))
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#define __SVE_ZREGS_SIZE(vq) \
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(__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET)
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#define __SVE_PREGS_OFFSET(vq) \
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(__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq))
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#define __SVE_PREG_OFFSET(vq, n) \
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(__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n))
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#define __SVE_PREGS_SIZE(vq) \
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(__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq))
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#define __SVE_FFR_OFFSET(vq) \
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(__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq))
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#endif /* ! _UAPI__ASM_SVE_CONTEXT_H */
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