diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2026-04-22 19:16:57 +0200 |
|---|---|---|
| committer | Eric Biggers <ebiggers@kernel.org> | 2026-05-28 13:14:17 -0700 |
| commit | 4156e65624f8a1816cad423ec005b336e280999d (patch) | |
| tree | 4743602dab7d60fdb0d4c96c440a97c0fe09208c /arch | |
| parent | e7ae89a0c97ce2b68b0983cd01eda67cf373517d (diff) | |
| download | linux-next-history-4156e65624f8a1816cad423ec005b336e280999d.tar.gz | |
ARM: Add a neon-intrinsics.h header like on arm64
Add a header asm/neon-intrinsics.h similar to the one that arm64 has.
This makes it possible for NEON intrinsics code to be shared seamlessly
between ARM and arm64.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260422171655.3437334-11-ardb+git@google.com
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/neon-intrinsics.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/include/asm/neon-intrinsics.h b/arch/arm/include/asm/neon-intrinsics.h new file mode 100644 index 0000000000000..8b80c05ce1d7d --- /dev/null +++ b/arch/arm/include/asm/neon-intrinsics.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_NEON_INTRINSICS_H +#define __ASM_NEON_INTRINSICS_H + +#ifndef __ARM_NEON__ +#error You should compile this file with '-march=armv7-a -mfloat-abi=softfp -mfpu=neon' +#endif + +#include <asm-generic/int-ll64.h> + +/* + * The C99 types uintXX_t that are usually defined in 'stdint.h' are not as + * unambiguous on ARM as you would expect. For the types below, there is a + * difference on ARM between GCC built for bare metal ARM, GCC built for glibc + * and the kernel itself, which results in build errors if you try to build + * with -ffreestanding and include 'stdint.h' (such as when you include + * 'arm_neon.h' in order to use NEON intrinsics) + * + * As the typedefs for these types in 'stdint.h' are based on builtin defines + * supplied by GCC, we can tweak these to align with the kernel's idea of those + * types, so 'linux/types.h' and 'stdint.h' can be safely included from the + * same source file (provided that -ffreestanding is used). + * + * int32_t uint32_t intptr_t uintptr_t + * bare metal GCC long unsigned long int unsigned int + * glibc GCC int unsigned int int unsigned int + * kernel int unsigned int long unsigned long + */ + +#ifdef __INT32_TYPE__ +#undef __INT32_TYPE__ +#define __INT32_TYPE__ int +#endif + +#ifdef __UINT32_TYPE__ +#undef __UINT32_TYPE__ +#define __UINT32_TYPE__ unsigned int +#endif + +#ifdef __INTPTR_TYPE__ +#undef __INTPTR_TYPE__ +#define __INTPTR_TYPE__ long +#endif + +#ifdef __UINTPTR_TYPE__ +#undef __UINTPTR_TYPE__ +#define __UINTPTR_TYPE__ unsigned long +#endif + +/* + * genksyms chokes on the ARM NEON instrinsics system header, but we + * don't export anything it defines anyway, so just disregard when + * genksyms execute. + */ +#ifndef __GENKSYMS__ +#include <arm_neon.h> +#endif + +#endif /* __ASM_NEON_INTRINSICS_H */ |