/* * 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 #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 *gpu, void *cpu, 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 each 8-byte line from cpu-side source, * incrementing it by the stride each time. */ "vld1.8 d0, [%1], %r2;\n" "vld1.8 d1, [%1], %r2;\n" "vld1.8 d2, [%1], %r2;\n" "vld1.8 d3, [%1], %r2;\n" "vld1.8 d4, [%1], %r2;\n" "vld1.8 d5, [%1], %r2;\n" "vld1.8 d6, [%1], %r2;\n" "vld1.8 d7, [%1];\n" /* Load from the GPU in one shot, no interleave, to * d0-d7. */ "vstm %0, {q0, q1, q2, q3};\n" : : "r"(gpu), "r"(cpu), "r"(cpu_stride) : "q0", "q1", "q2", "q3"); } else { assert(gpu_stride == 16); __asm__ volatile ( /* Load each 16-byte line in 2 parts from the cpu-side * destination. (vld1 can only store one d-register * at a time). */ "vld1.8 d0, [%1], %r3;\n" "vld1.8 d1, [%2], %r3;\n" "vld1.8 d2, [%1], %r3;\n" "vld1.8 d3, [%2], %r3;\n" "vld1.8 d4, [%1], %r3;\n" "vld1.8 d5, [%2], %r3;\n" "vld1.8 d6, [%1];\n" "vld1.8 d7, [%2];\n" /* Store to the GPU in one shot, no interleave. */ "vstm %0, {q0, q1, q2, q3};\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(gpu + gpu_offset, cpu, gpu_stride); cpu += cpu_stride; } #endif } 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); } } }