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/*
* Copyright (c) 2013 Intel Corporation
*
* 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.
*
* Authors:
* Chris Wilson <chris@chris-wilson.co.uk>
*
*/
#include "config.h"
#include "igt_x86.h"
#include "igt_aux.h"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
/**
* SECTION:igt_x86
* @short_description: x86 helper library
* @title: x86
* @include: igt_x86.h
*/
#if defined(__x86_64__) || defined(__i386__)
char *igt_x86_features_to_string(unsigned features, char *line)
{
char *ret = line;
#ifdef __x86_64__
line += sprintf(line, "x86-64");
#else
line += sprintf(line, "x86");
#endif
if (features & SSE2)
line += sprintf(line, ", sse2");
if (features & SSE3)
line += sprintf(line, ", sse3");
if (features & SSSE3)
line += sprintf(line, ", ssse3");
if (features & SSE4_1)
line += sprintf(line, ", sse4.1");
if (features & SSE4_2)
line += sprintf(line, ", sse4.2");
if (features & AVX)
line += sprintf(line, ", avx");
if (features & AVX2)
line += sprintf(line, ", avx2");
if (features & F16C)
line += sprintf(line, ", f16c");
(void)line;
return ret;
}
#endif
#if defined(__x86_64__) && !defined(__clang__) && defined(__GLIBC__) && !defined(__UCLIBC__)
#pragma GCC push_options
#pragma GCC target("sse4.1")
#pragma GCC diagnostic ignored "-Wpointer-arith"
#include <smmintrin.h>
static void memcpy_from_wc_sse41(void *dst, const void *src, unsigned long len)
{
char buf[16];
/* Flush the internal buffer of potential stale gfx data */
_mm_mfence();
if ((uintptr_t)src & 15) {
__m128i *S = (__m128i *)((uintptr_t)src & ~15);
unsigned long misalign = (uintptr_t)src & 15;
unsigned long copy = min(len, 16 - misalign);
_mm_storeu_si128((__m128i *)buf,
_mm_stream_load_si128(S));
memcpy(dst, buf + misalign, copy);
dst += copy;
src += copy;
len -= copy;
}
/* We assume we are doing bulk transfers, so prefer aligned moves */
if (((uintptr_t)dst & 15) == 0) {
while (len >= 64) {
__m128i *S = (__m128i *)src;
__m128i *D = (__m128i *)dst;
__m128i tmp[4];
tmp[0] = _mm_stream_load_si128(S + 0);
tmp[1] = _mm_stream_load_si128(S + 1);
tmp[2] = _mm_stream_load_si128(S + 2);
tmp[3] = _mm_stream_load_si128(S + 3);
_mm_store_si128(D + 0, tmp[0]);
_mm_store_si128(D + 1, tmp[1]);
_mm_store_si128(D + 2, tmp[2]);
_mm_store_si128(D + 3, tmp[3]);
src += 64;
dst += 64;
len -= 64;
}
} else {
while (len >= 64) {
__m128i *S = (__m128i *)src;
__m128i *D = (__m128i *)dst;
__m128i tmp[4];
tmp[0] = _mm_stream_load_si128(S + 0);
tmp[1] = _mm_stream_load_si128(S + 1);
tmp[2] = _mm_stream_load_si128(S + 2);
tmp[3] = _mm_stream_load_si128(S + 3);
_mm_storeu_si128(D + 0, tmp[0]);
_mm_storeu_si128(D + 1, tmp[1]);
_mm_storeu_si128(D + 2, tmp[2]);
_mm_storeu_si128(D + 3, tmp[3]);
src += 64;
dst += 64;
len -= 64;
}
}
while (len >= 16) {
_mm_storeu_si128((__m128i *)dst,
_mm_stream_load_si128((__m128i *)src));
src += 16;
dst += 16;
len -= 16;
}
if (len) {
_mm_storeu_si128((__m128i *)buf,
_mm_stream_load_si128((__m128i *)src));
memcpy(dst, buf, len);
}
}
#pragma GCC pop_options
static void memcpy_from_wc(void *dst, const void *src, unsigned long len)
{
memcpy(dst, src, len);
}
/* The PLT is not initialized when ifunc resolvers run, so all external
* functions must be inlined with __attribute__((flatten)).
*/
__attribute__((flatten))
static void (*resolve_memcpy_from_wc(void))(void *, const void *, unsigned long)
{
if (igt_x86_features() & SSE4_1)
return memcpy_from_wc_sse41;
return memcpy_from_wc;
}
void igt_memcpy_from_wc(void *dst, const void *src, unsigned long len)
__attribute__((ifunc("resolve_memcpy_from_wc")));
#else
void igt_memcpy_from_wc(void *dst, const void *src, unsigned long len)
{
memcpy(dst, src, len);
}
#endif
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