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/*
* Copyright © 2017 Broadcom
*
* 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.
*/
/** @file vc4_tiling_lt.c
*
* Helper functions from vc4_tiling.c that will be compiled for using NEON
* assembly or not.
*
* If VC4_BUILD_NEON is set, then the functions will be suffixed with _neon.
* They will only use NEON assembly if __ARM_ARCH is also set, to keep the x86
* sim build working.
*/
#include <string.h>
#include "pipe/p_state.h"
#include "vc4_tiling.h"
#ifdef VC4_BUILD_NEON
#define NEON_TAG(x) x ## _neon
#else
#define NEON_TAG(x) x ## _base
#endif
/** Returns the stride in bytes of a 64-byte microtile. */
static uint32_t
vc4_utile_stride(int cpp)
{
switch (cpp) {
case 1:
return 8;
case 2:
case 4:
case 8:
return 16;
default:
unreachable("bad cpp");
}
}
static void
vc4_load_utile(void *cpu, void *gpu, uint32_t cpu_stride, uint32_t cpp)
{
uint32_t gpu_stride = vc4_utile_stride(cpp);
#if defined(VC4_BUILD_NEON) && defined(__ARM_ARCH)
if (gpu_stride == 8) {
__asm__ volatile (
/* Load from the GPU in one shot, no interleave, to
* d0-d7.
*/
"vldm %0, {q0, q1, q2, q3};\n"
/* Store each 8-byte line to cpu-side destination,
* incrementing it by the stride each time.
*/
"vst1.8 d0, [%1], %r2;\n"
"vst1.8 d1, [%1], %r2;\n"
"vst1.8 d2, [%1], %r2;\n"
"vst1.8 d3, [%1], %r2;\n"
"vst1.8 d4, [%1], %r2;\n"
"vst1.8 d5, [%1], %r2;\n"
"vst1.8 d6, [%1], %r2;\n"
"vst1.8 d7, [%1];\n"
:
: "r"(gpu), "r"(cpu), "r"(cpu_stride)
: "q0", "q1", "q2", "q3");
} else {
assert(gpu_stride == 16);
__asm__ volatile (
/* Load from the GPU in one shot, no interleave, to
* d0-d7.
*/
"vldm %0, {q0, q1, q2, q3};\n"
/* Store each 16-byte line in 2 parts to the cpu-side
* destination. (vld1 can only store one d-register
* at a time).
*/
"vst1.8 d0, [%1], %r3;\n"
"vst1.8 d1, [%2], %r3;\n"
"vst1.8 d2, [%1], %r3;\n"
"vst1.8 d3, [%2], %r3;\n"
"vst1.8 d4, [%1], %r3;\n"
"vst1.8 d5, [%2], %r3;\n"
"vst1.8 d6, [%1];\n"
"vst1.8 d7, [%2];\n"
:
: "r"(gpu), "r"(cpu), "r"(cpu + 8), "r"(cpu_stride)
: "q0", "q1", "q2", "q3");
}
#else
for (uint32_t gpu_offset = 0; gpu_offset < 64; gpu_offset += gpu_stride) {
memcpy(cpu, gpu + gpu_offset, gpu_stride);
cpu += cpu_stride;
}
#endif
}
static void
vc4_store_utile(void *dst, void *src, uint32_t src_stride, uint32_t cpp)
{
uint32_t dst_stride = vc4_utile_stride(cpp);
for (uint32_t dst_offset = 0; dst_offset < 64; dst_offset += dst_stride) {
memcpy(dst + dst_offset, src, dst_stride);
src += src_stride;
}
}
void
NEON_TAG(vc4_load_lt_image)(void *dst, uint32_t dst_stride,
void *src, uint32_t src_stride,
int cpp, const struct pipe_box *box)
{
uint32_t utile_w = vc4_utile_width(cpp);
uint32_t utile_h = vc4_utile_height(cpp);
uint32_t xstart = box->x;
uint32_t ystart = box->y;
for (uint32_t y = 0; y < box->height; y += utile_h) {
for (int x = 0; x < box->width; x += utile_w) {
vc4_load_utile(dst + (dst_stride * y +
x * cpp),
src + ((ystart + y) * src_stride +
(xstart + x) * 64 / utile_w),
dst_stride, cpp);
}
}
}
void
NEON_TAG(vc4_store_lt_image)(void *dst, uint32_t dst_stride,
void *src, uint32_t src_stride,
int cpp, const struct pipe_box *box)
{
uint32_t utile_w = vc4_utile_width(cpp);
uint32_t utile_h = vc4_utile_height(cpp);
uint32_t xstart = box->x;
uint32_t ystart = box->y;
for (uint32_t y = 0; y < box->height; y += utile_h) {
for (int x = 0; x < box->width; x += utile_w) {
vc4_store_utile(dst + ((ystart + y) * dst_stride +
(xstart + x) * 64 / utile_w),
src + (src_stride * y +
x * cpp),
src_stride, cpp);
}
}
}
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