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Diffstat (limited to 'third_party/aom/aom_ports/x86.h')
| -rw-r--r-- | third_party/aom/aom_ports/x86.h | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/third_party/aom/aom_ports/x86.h b/third_party/aom/aom_ports/x86.h new file mode 100644 index 000000000..e5680ca93 --- /dev/null +++ b/third_party/aom/aom_ports/x86.h @@ -0,0 +1,322 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#ifndef AOM_PORTS_X86_H_ +#define AOM_PORTS_X86_H_ +#include <stdlib.h> + +#if defined(_MSC_VER) +#include <intrin.h> /* For __cpuidex, __rdtsc */ +#endif + +#include "aom_config.h" +#include "aom/aom_integer.h" + +#ifdef __cplusplus +extern "C" { +#endif + +typedef enum { + AOM_CPU_UNKNOWN = -1, + AOM_CPU_AMD, + AOM_CPU_AMD_OLD, + AOM_CPU_CENTAUR, + AOM_CPU_CYRIX, + AOM_CPU_INTEL, + AOM_CPU_NEXGEN, + AOM_CPU_NSC, + AOM_CPU_RISE, + AOM_CPU_SIS, + AOM_CPU_TRANSMETA, + AOM_CPU_TRANSMETA_OLD, + AOM_CPU_UMC, + AOM_CPU_VIA, + + AOM_CPU_LAST +} aom_cpu_t; + +#if defined(__GNUC__) && __GNUC__ || defined(__ANDROID__) +#if ARCH_X86_64 +#define cpuid(func, func2, ax, bx, cx, dx) \ + __asm__ __volatile__("cpuid \n\t" \ + : "=a"(ax), "=b"(bx), "=c"(cx), "=d"(dx) \ + : "a"(func), "c"(func2)); +#else +#define cpuid(func, func2, ax, bx, cx, dx) \ + __asm__ __volatile__( \ + "mov %%ebx, %%edi \n\t" \ + "cpuid \n\t" \ + "xchg %%edi, %%ebx \n\t" \ + : "=a"(ax), "=D"(bx), "=c"(cx), "=d"(dx) \ + : "a"(func), "c"(func2)); +#endif +#elif defined(__SUNPRO_C) || \ + defined(__SUNPRO_CC) /* end __GNUC__ or __ANDROID__*/ +#if ARCH_X86_64 +#define cpuid(func, func2, ax, bx, cx, dx) \ + asm volatile( \ + "xchg %rsi, %rbx \n\t" \ + "cpuid \n\t" \ + "movl %ebx, %edi \n\t" \ + "xchg %rsi, %rbx \n\t" \ + : "=a"(ax), "=D"(bx), "=c"(cx), "=d"(dx) \ + : "a"(func), "c"(func2)); +#else +#define cpuid(func, func2, ax, bx, cx, dx) \ + asm volatile( \ + "pushl %ebx \n\t" \ + "cpuid \n\t" \ + "movl %ebx, %edi \n\t" \ + "popl %ebx \n\t" \ + : "=a"(ax), "=D"(bx), "=c"(cx), "=d"(dx) \ + : "a"(func), "c"(func2)); +#endif +#else /* end __SUNPRO__ */ +#if ARCH_X86_64 +#if defined(_MSC_VER) && _MSC_VER > 1500 +#define cpuid(func, func2, a, b, c, d) \ + do { \ + int regs[4]; \ + __cpuidex(regs, func, func2); \ + a = regs[0]; \ + b = regs[1]; \ + c = regs[2]; \ + d = regs[3]; \ + } while (0) +#else +#define cpuid(func, func2, a, b, c, d) \ + do { \ + int regs[4]; \ + __cpuid(regs, func); \ + a = regs[0]; \ + b = regs[1]; \ + c = regs[2]; \ + d = regs[3]; \ + } while (0) +#endif +#else +/* clang-format off */ +#define cpuid(func, func2, a, b, c, d) \ + __asm mov eax, func \ + __asm mov ecx, func2 \ + __asm cpuid \ + __asm mov a, eax \ + __asm mov b, ebx \ + __asm mov c, ecx \ + __asm mov d, edx +#endif +/* clang-format on */ +#endif /* end others */ + +// NaCl has no support for xgetbv or the raw opcode. +#if !defined(__native_client__) && (defined(__i386__) || defined(__x86_64__)) +static INLINE uint64_t xgetbv(void) { + const uint32_t ecx = 0; + uint32_t eax, edx; + // Use the raw opcode for xgetbv for compatibility with older toolchains. + __asm__ volatile(".byte 0x0f, 0x01, 0xd0\n" + : "=a"(eax), "=d"(edx) + : "c"(ecx)); + return ((uint64_t)edx << 32) | eax; +} +#elif (defined(_M_X64) || defined(_M_IX86)) && defined(_MSC_FULL_VER) && \ + _MSC_FULL_VER >= 160040219 // >= VS2010 SP1 +#include <immintrin.h> +#define xgetbv() _xgetbv(0) +#elif defined(_MSC_VER) && defined(_M_IX86) +static INLINE uint64_t xgetbv(void) { + uint32_t eax_, edx_; + __asm { + xor ecx, ecx // ecx = 0 + // Use the raw opcode for xgetbv for compatibility with older toolchains. + __asm _emit 0x0f __asm _emit 0x01 __asm _emit 0xd0 + mov eax_, eax + mov edx_, edx + } + return ((uint64_t)edx_ << 32) | eax_; +} +#else +#define xgetbv() 0U // no AVX for older x64 or unrecognized toolchains. +#endif + +#if defined(_MSC_VER) && _MSC_VER >= 1700 +#include <windows.h> +#if WINAPI_FAMILY_PARTITION(WINAPI_FAMILY_APP) +#define getenv(x) NULL +#endif +#endif + +#define HAS_MMX 0x01 +#define HAS_SSE 0x02 +#define HAS_SSE2 0x04 +#define HAS_SSE3 0x08 +#define HAS_SSSE3 0x10 +#define HAS_SSE4_1 0x20 +#define HAS_AVX 0x40 +#define HAS_AVX2 0x80 +#ifndef BIT +#define BIT(n) (1 << n) +#endif + +static INLINE int x86_simd_caps(void) { + unsigned int flags = 0; + unsigned int mask = ~0; + unsigned int max_cpuid_val, reg_eax, reg_ebx, reg_ecx, reg_edx; + char *env; + (void)reg_ebx; + + /* See if the CPU capabilities are being overridden by the environment */ + env = getenv("AOM_SIMD_CAPS"); + + if (env && *env) return (int)strtol(env, NULL, 0); + + env = getenv("AOM_SIMD_CAPS_MASK"); + + if (env && *env) mask = (unsigned int)strtoul(env, NULL, 0); + + /* Ensure that the CPUID instruction supports extended features */ + cpuid(0, 0, max_cpuid_val, reg_ebx, reg_ecx, reg_edx); + + if (max_cpuid_val < 1) return 0; + + /* Get the standard feature flags */ + cpuid(1, 0, reg_eax, reg_ebx, reg_ecx, reg_edx); + + if (reg_edx & BIT(23)) flags |= HAS_MMX; + + if (reg_edx & BIT(25)) flags |= HAS_SSE; /* aka xmm */ + + if (reg_edx & BIT(26)) flags |= HAS_SSE2; /* aka wmt */ + + if (reg_ecx & BIT(0)) flags |= HAS_SSE3; + + if (reg_ecx & BIT(9)) flags |= HAS_SSSE3; + + if (reg_ecx & BIT(19)) flags |= HAS_SSE4_1; + + // bits 27 (OSXSAVE) & 28 (256-bit AVX) + if ((reg_ecx & (BIT(27) | BIT(28))) == (BIT(27) | BIT(28))) { + if ((xgetbv() & 0x6) == 0x6) { + flags |= HAS_AVX; + + if (max_cpuid_val >= 7) { + /* Get the leaf 7 feature flags. Needed to check for AVX2 support */ + cpuid(7, 0, reg_eax, reg_ebx, reg_ecx, reg_edx); + + if (reg_ebx & BIT(5)) flags |= HAS_AVX2; + } + } + } + + return flags & mask; +} + +// Note: +// 32-bit CPU cycle counter is light-weighted for most function performance +// measurement. For large function (CPU time > a couple of seconds), 64-bit +// counter should be used. +// 32-bit CPU cycle counter +static INLINE unsigned int x86_readtsc(void) { +#if defined(__GNUC__) && __GNUC__ + unsigned int tsc; + __asm__ __volatile__("rdtsc\n\t" : "=a"(tsc) :); + return tsc; +#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) + unsigned int tsc; + asm volatile("rdtsc\n\t" : "=a"(tsc) :); + return tsc; +#else +#if ARCH_X86_64 + return (unsigned int)__rdtsc(); +#else + __asm rdtsc; +#endif +#endif +} +// 64-bit CPU cycle counter +static INLINE uint64_t x86_readtsc64(void) { +#if defined(__GNUC__) && __GNUC__ + uint32_t hi, lo; + __asm__ __volatile__("rdtsc" : "=a"(lo), "=d"(hi)); + return ((uint64_t)hi << 32) | lo; +#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) + uint_t hi, lo; + asm volatile("rdtsc\n\t" : "=a"(lo), "=d"(hi)); + return ((uint64_t)hi << 32) | lo; +#else +#if ARCH_X86_64 + return (uint64_t)__rdtsc(); +#else + __asm rdtsc; +#endif +#endif +} + +#if defined(__GNUC__) && __GNUC__ +#define x86_pause_hint() __asm__ __volatile__("pause \n\t") +#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) +#define x86_pause_hint() asm volatile("pause \n\t") +#else +#if ARCH_X86_64 +#define x86_pause_hint() _mm_pause(); +#else +#define x86_pause_hint() __asm pause +#endif +#endif + +#if defined(__GNUC__) && __GNUC__ +static void x87_set_control_word(unsigned short mode) { + __asm__ __volatile__("fldcw %0" : : "m"(*&mode)); +} +static unsigned short x87_get_control_word(void) { + unsigned short mode; + __asm__ __volatile__("fstcw %0\n\t" : "=m"(*&mode) :); + return mode; +} +#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC) +static void x87_set_control_word(unsigned short mode) { + asm volatile("fldcw %0" : : "m"(*&mode)); +} +static unsigned short x87_get_control_word(void) { + unsigned short mode; + asm volatile("fstcw %0\n\t" : "=m"(*&mode) :); + return mode; +} +#elif ARCH_X86_64 +/* No fldcw intrinsics on Windows x64, punt to external asm */ +extern void aom_winx64_fldcw(unsigned short mode); +extern unsigned short aom_winx64_fstcw(void); +#define x87_set_control_word aom_winx64_fldcw +#define x87_get_control_word aom_winx64_fstcw +#else +static void x87_set_control_word(unsigned short mode) { + __asm { fldcw mode } +} +static unsigned short x87_get_control_word(void) { + unsigned short mode; + __asm { fstcw mode } + return mode; +} +#endif + +static INLINE unsigned int x87_set_double_precision(void) { + unsigned int mode = x87_get_control_word(); + x87_set_control_word((mode & ~0x300) | 0x200); + return mode; +} + +extern void aom_reset_mmx_state(void); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_PORTS_X86_H_ |