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/*
* Copyright © 2021 Google LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "util/detect_arch.h"
#include "util/format/u_format.h"
#if (DETECT_ARCH_AARCH64 || DETECT_ARCH_ARM) && !defined(NO_FORMAT_ASM) && !defined(__SOFTFP__)
/* armhf builds default to vfp, not neon, and refuses to compile neon intrinsics
* unless you tell it "no really".
*/
#if DETECT_ARCH_ARM
#pragma GCC target ("fpu=neon")
#endif
#include <arm_neon.h>
#include "u_format_pack.h"
#include "util/u_cpu_detect.h"
static void
util_format_b8g8r8a8_unorm_unpack_rgba_8unorm_neon(uint8_t *restrict dst, const uint8_t *restrict src, unsigned width)
{
while (width >= 16) {
uint8x16x4_t load = vld4q_u8(src);
uint8x16x4_t swap = { .val = { load.val[2], load.val[1], load.val[0], load.val[3] } };
vst4q_u8(dst, swap);
width -= 16;
dst += 16 * 4;
src += 16 * 4;
}
if (width)
util_format_b8g8r8a8_unorm_unpack_rgba_8unorm(dst, src, width);
}
static const struct util_format_unpack_description util_format_unpack_descriptions_neon[] = {
[PIPE_FORMAT_B8G8R8A8_UNORM] = {
.unpack_rgba_8unorm = &util_format_b8g8r8a8_unorm_unpack_rgba_8unorm_neon,
.unpack_rgba = &util_format_b8g8r8a8_unorm_unpack_rgba_float,
},
};
const struct util_format_unpack_description *
util_format_unpack_description_neon(enum pipe_format format)
{
/* CPU detect for NEON support. On arm64, it's implied. */
#if DETECT_ARCH_ARM
if (!util_get_cpu_caps()->has_neon)
return NULL;
#endif
if (format >= ARRAY_SIZE(util_format_unpack_descriptions_neon))
return NULL;
if (!util_format_unpack_descriptions_neon[format].unpack_rgba)
return NULL;
return &util_format_unpack_descriptions_neon[format];
}
#endif /* DETECT_ARCH_AARCH64 | DETECT_ARCH_ARM */
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