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Diffstat (limited to 'src/pixman/pixman/pixman-arm.c')
| -rw-r--r-- | src/pixman/pixman/pixman-arm.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/pixman/pixman/pixman-arm.c b/src/pixman/pixman/pixman-arm.c new file mode 100644 index 0000000..23374e4 --- /dev/null +++ b/src/pixman/pixman/pixman-arm.c @@ -0,0 +1,225 @@ +/* + * Copyright © 2000 SuSE, Inc. + * Copyright © 2007 Red Hat, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of SuSE not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. SuSE makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "pixman-private.h" + +typedef enum +{ + ARM_V7 = (1 << 0), + ARM_V6 = (1 << 1), + ARM_VFP = (1 << 2), + ARM_NEON = (1 << 3), + ARM_IWMMXT = (1 << 4) +} arm_cpu_features_t; + +#if defined(USE_ARM_SIMD) || defined(USE_ARM_NEON) || defined(USE_ARM_IWMMXT) + +#if defined(_MSC_VER) + +/* Needed for EXCEPTION_ILLEGAL_INSTRUCTION */ +#include <windows.h> + +extern int pixman_msvc_try_arm_neon_op (); +extern int pixman_msvc_try_arm_simd_op (); + +static arm_cpu_features_t +detect_cpu_features (void) +{ + arm_cpu_features_t features = 0; + + __try + { + pixman_msvc_try_arm_simd_op (); + features |= ARM_V6; + } + __except (GetExceptionCode () == EXCEPTION_ILLEGAL_INSTRUCTION) + { + } + + __try + { + pixman_msvc_try_arm_neon_op (); + features |= ARM_NEON; + } + __except (GetExceptionCode () == EXCEPTION_ILLEGAL_INSTRUCTION) + { + } + + return features; +} + +#elif defined(__APPLE__) && defined(TARGET_OS_IPHONE) /* iOS */ + +#include "TargetConditionals.h" + +static arm_cpu_features_t +detect_cpu_features (void) +{ + arm_cpu_features_t features = 0; + + features |= ARM_V6; + + /* Detection of ARM NEON on iOS is fairly simple because iOS binaries + * contain separate executable images for each processor architecture. + * So all we have to do is detect the armv7 architecture build. The + * operating system automatically runs the armv7 binary for armv7 devices + * and the armv6 binary for armv6 devices. + */ +#if defined(__ARM_NEON__) + features |= ARM_NEON; +#endif + + return features; +} + +#elif defined(__ANDROID__) || defined(ANDROID) /* Android */ + +#include <cpu-features.h> + +static arm_cpu_features_t +detect_cpu_features (void) +{ + arm_cpu_features_t features = 0; + AndroidCpuFamily cpu_family; + uint64_t cpu_features; + + cpu_family = android_getCpuFamily(); + cpu_features = android_getCpuFeatures(); + + if (cpu_family == ANDROID_CPU_FAMILY_ARM) + { + if (cpu_features & ANDROID_CPU_ARM_FEATURE_ARMv7) + features |= ARM_V7; + + if (cpu_features & ANDROID_CPU_ARM_FEATURE_VFPv3) + features |= ARM_VFP; + + if (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON) + features |= ARM_NEON; + } + + return features; +} + +#elif defined (__linux__) /* linux ELF */ + +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <fcntl.h> +#include <string.h> +#include <elf.h> + +static arm_cpu_features_t +detect_cpu_features (void) +{ + arm_cpu_features_t features = 0; + Elf32_auxv_t aux; + int fd; + + fd = open ("/proc/self/auxv", O_RDONLY); + if (fd >= 0) + { + while (read (fd, &aux, sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t)) + { + if (aux.a_type == AT_HWCAP) + { + uint32_t hwcap = aux.a_un.a_val; + + /* hardcode these values to avoid depending on specific + * versions of the hwcap header, e.g. HWCAP_NEON + */ + if ((hwcap & 64) != 0) + features |= ARM_VFP; + if ((hwcap & 512) != 0) + features |= ARM_IWMMXT; + /* this flag is only present on kernel 2.6.29 */ + if ((hwcap & 4096) != 0) + features |= ARM_NEON; + } + else if (aux.a_type == AT_PLATFORM) + { + const char *plat = (const char*) aux.a_un.a_val; + + if (strncmp (plat, "v7l", 3) == 0) + features |= (ARM_V7 | ARM_V6); + else if (strncmp (plat, "v6l", 3) == 0) + features |= ARM_V6; + } + } + close (fd); + } + + return features; +} + +#else /* Unknown */ + +static arm_cpu_features_t +detect_cpu_features (void) +{ + return 0; +} + +#endif /* Linux elf */ + +static pixman_bool_t +have_feature (arm_cpu_features_t feature) +{ + static pixman_bool_t initialized; + static arm_cpu_features_t features; + + if (!initialized) + { + features = detect_cpu_features(); + initialized = TRUE; + } + + return (features & feature) == feature; +} + +#endif /* USE_ARM_SIMD || USE_ARM_NEON || USE_ARM_IWMMXT */ + +pixman_implementation_t * +_pixman_arm_get_implementations (pixman_implementation_t *imp) +{ +#ifdef USE_ARM_SIMD + if (!_pixman_disabled ("arm-simd") && have_feature (ARM_V6)) + imp = _pixman_implementation_create_arm_simd (imp); +#endif + +#ifdef USE_ARM_IWMMXT + if (!_pixman_disabled ("arm-iwmmxt") && have_feature (ARM_IWMMXT)) + imp = _pixman_implementation_create_mmx (imp); +#endif + +#ifdef USE_ARM_NEON + if (!_pixman_disabled ("arm-neon") && have_feature (ARM_NEON)) + imp = _pixman_implementation_create_arm_neon (imp); +#endif + + return imp; +} |
