michael@0: /*
michael@0:  * Copyright © 2000 SuSE, Inc.
michael@0:  * Copyright © 2007 Red Hat, Inc.
michael@0:  *
michael@0:  * Permission to use, copy, modify, distribute, and sell this software and its
michael@0:  * documentation for any purpose is hereby granted without fee, provided that
michael@0:  * the above copyright notice appear in all copies and that both that
michael@0:  * copyright notice and this permission notice appear in supporting
michael@0:  * documentation, and that the name of SuSE not be used in advertising or
michael@0:  * publicity pertaining to distribution of the software without specific,
michael@0:  * written prior permission.  SuSE makes no representations about the
michael@0:  * suitability of this software for any purpose.  It is provided "as is"
michael@0:  * without express or implied warranty.
michael@0:  *
michael@0:  * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
michael@0:  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
michael@0:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
michael@0:  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
michael@0:  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
michael@0:  */
michael@0: #ifdef HAVE_CONFIG_H
michael@0: #include <config.h>
michael@0: #endif
michael@0: 
michael@0: #include <string.h>
michael@0: #include <stdlib.h>
michael@0: 
michael@0: #if defined(USE_ARM_SIMD) && defined(_MSC_VER)
michael@0: /* Needed for EXCEPTION_ILLEGAL_INSTRUCTION */
michael@0: #include <windows.h>
michael@0: #endif
michael@0: 
michael@0: #if defined(__APPLE__)
michael@0: #include "TargetConditionals.h"
michael@0: #endif
michael@0: 
michael@0: #include "pixman-private.h"
michael@0: 
michael@0: #ifdef USE_VMX
michael@0: 
michael@0: /* The CPU detection code needs to be in a file not compiled with
michael@0:  * "-maltivec -mabi=altivec", as gcc would try to save vector register
michael@0:  * across function calls causing SIGILL on cpus without Altivec/vmx.
michael@0:  */
michael@0: static pixman_bool_t initialized = FALSE;
michael@0: static volatile pixman_bool_t have_vmx = TRUE;
michael@0: 
michael@0: #ifdef __APPLE__
michael@0: #include <sys/sysctl.h>
michael@0: 
michael@0: static pixman_bool_t
michael@0: pixman_have_vmx (void)
michael@0: {
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	size_t length = sizeof(have_vmx);
michael@0: 	int error =
michael@0: 	    sysctlbyname ("hw.optional.altivec", &have_vmx, &length, NULL, 0);
michael@0: 
michael@0: 	if (error)
michael@0: 	    have_vmx = FALSE;
michael@0: 
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0:     return have_vmx;
michael@0: }
michael@0: 
michael@0: #elif defined (__OpenBSD__)
michael@0: #include <sys/param.h>
michael@0: #include <sys/sysctl.h>
michael@0: #include <machine/cpu.h>
michael@0: 
michael@0: static pixman_bool_t
michael@0: pixman_have_vmx (void)
michael@0: {
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
michael@0: 	size_t length = sizeof(have_vmx);
michael@0: 	int error =
michael@0: 	    sysctl (mib, 2, &have_vmx, &length, NULL, 0);
michael@0: 
michael@0: 	if (error != 0)
michael@0: 	    have_vmx = FALSE;
michael@0: 
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0:     return have_vmx;
michael@0: }
michael@0: 
michael@0: #elif defined (__linux__)
michael@0: #include <sys/types.h>
michael@0: #include <sys/stat.h>
michael@0: #include <fcntl.h>
michael@0: #include <unistd.h>
michael@0: #include <stdio.h>
michael@0: #include <linux/auxvec.h>
michael@0: #include <asm/cputable.h>
michael@0: 
michael@0: static pixman_bool_t
michael@0: pixman_have_vmx (void)
michael@0: {
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	char fname[64];
michael@0: 	unsigned long buf[64];
michael@0: 	ssize_t count = 0;
michael@0: 	pid_t pid;
michael@0: 	int fd, i;
michael@0: 
michael@0: 	pid = getpid ();
michael@0: 	snprintf (fname, sizeof(fname) - 1, "/proc/%d/auxv", pid);
michael@0: 
michael@0: 	fd = open (fname, O_RDONLY);
michael@0: 	if (fd >= 0)
michael@0: 	{
michael@0: 	    for (i = 0; i <= (count / sizeof(unsigned long)); i += 2)
michael@0: 	    {
michael@0: 		/* Read more if buf is empty... */
michael@0: 		if (i == (count / sizeof(unsigned long)))
michael@0: 		{
michael@0: 		    count = read (fd, buf, sizeof(buf));
michael@0: 		    if (count <= 0)
michael@0: 			break;
michael@0: 		    i = 0;
michael@0: 		}
michael@0: 
michael@0: 		if (buf[i] == AT_HWCAP)
michael@0: 		{
michael@0: 		    have_vmx = !!(buf[i + 1] & PPC_FEATURE_HAS_ALTIVEC);
michael@0: 		    initialized = TRUE;
michael@0: 		    break;
michael@0: 		}
michael@0: 		else if (buf[i] == AT_NULL)
michael@0: 		{
michael@0: 		    break;
michael@0: 		}
michael@0: 	    }
michael@0: 	    close (fd);
michael@0: 	}
michael@0:     }
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	/* Something went wrong. Assume 'no' rather than playing
michael@0: 	   fragile tricks with catching SIGILL. */
michael@0: 	have_vmx = FALSE;
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0: 
michael@0:     return have_vmx;
michael@0: }
michael@0: 
michael@0: #else /* !__APPLE__ && !__OpenBSD__ && !__linux__ */
michael@0: #include <signal.h>
michael@0: #include <setjmp.h>
michael@0: 
michael@0: static jmp_buf jump_env;
michael@0: 
michael@0: static void
michael@0: vmx_test (int        sig,
michael@0: 	  siginfo_t *si,
michael@0: 	  void *     unused)
michael@0: {
michael@0:     longjmp (jump_env, 1);
michael@0: }
michael@0: 
michael@0: static pixman_bool_t
michael@0: pixman_have_vmx (void)
michael@0: {
michael@0:     struct sigaction sa, osa;
michael@0:     int jmp_result;
michael@0: 
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	sa.sa_flags = SA_SIGINFO;
michael@0: 	sigemptyset (&sa.sa_mask);
michael@0: 	sa.sa_sigaction = vmx_test;
michael@0: 	sigaction (SIGILL, &sa, &osa);
michael@0: 	jmp_result = setjmp (jump_env);
michael@0: 	if (jmp_result == 0)
michael@0: 	{
michael@0: 	    asm volatile ( "vor 0, 0, 0" );
michael@0: 	}
michael@0: 	sigaction (SIGILL, &osa, NULL);
michael@0: 	have_vmx = (jmp_result == 0);
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0:     return have_vmx;
michael@0: }
michael@0: 
michael@0: #endif /* __APPLE__ */
michael@0: #endif /* USE_VMX */
michael@0: 
michael@0: #if defined(USE_ARM_SIMD) || defined(USE_ARM_NEON) || defined(USE_ARM_IWMMXT)
michael@0: 
michael@0: #if defined(_MSC_VER)
michael@0: 
michael@0: #if defined(USE_ARM_SIMD)
michael@0: extern int pixman_msvc_try_arm_simd_op ();
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_arm_simd (void)
michael@0: {
michael@0:     static pixman_bool_t initialized = FALSE;
michael@0:     static pixman_bool_t have_arm_simd = FALSE;
michael@0: 
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	__try {
michael@0: 	    pixman_msvc_try_arm_simd_op ();
michael@0: 	    have_arm_simd = TRUE;
michael@0: 	} __except (GetExceptionCode () == EXCEPTION_ILLEGAL_INSTRUCTION) {
michael@0: 	    have_arm_simd = FALSE;
michael@0: 	}
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0: 
michael@0:     return have_arm_simd;
michael@0: }
michael@0: 
michael@0: #endif /* USE_ARM_SIMD */
michael@0: 
michael@0: #if defined(USE_ARM_NEON)
michael@0: extern int pixman_msvc_try_arm_neon_op ();
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_arm_neon (void)
michael@0: {
michael@0:     static pixman_bool_t initialized = FALSE;
michael@0:     static pixman_bool_t have_arm_neon = FALSE;
michael@0: 
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	__try
michael@0: 	{
michael@0: 	    pixman_msvc_try_arm_neon_op ();
michael@0: 	    have_arm_neon = TRUE;
michael@0: 	}
michael@0: 	__except (GetExceptionCode () == EXCEPTION_ILLEGAL_INSTRUCTION)
michael@0: 	{
michael@0: 	    have_arm_neon = FALSE;
michael@0: 	}
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0: 
michael@0:     return have_arm_neon;
michael@0: }
michael@0: 
michael@0: #endif /* USE_ARM_NEON */
michael@0: 
michael@0: #elif (defined (__APPLE__) && defined(TARGET_OS_IPHONE)) /* iOS (iPhone/iPad/iPod touch) */
michael@0: 
michael@0: /* Detection of ARM NEON on iOS is fairly simple because iOS binaries
michael@0:  * contain separate executable images for each processor architecture.
michael@0:  * So all we have to do is detect the armv7 architecture build. The
michael@0:  * operating system automatically runs the armv7 binary for armv7 devices
michael@0:  * and the armv6 binary for armv6 devices.
michael@0:  */
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_arm_simd (void)
michael@0: {
michael@0: #if defined(USE_ARM_SIMD)
michael@0:     return TRUE;
michael@0: #else
michael@0:     return FALSE;
michael@0: #endif
michael@0: }
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_arm_neon (void)
michael@0: {
michael@0: #if defined(USE_ARM_NEON) && defined(__ARM_NEON__)
michael@0:     /* This is an armv7 cpu build */
michael@0:     return TRUE;
michael@0: #else
michael@0:     /* This is an armv6 cpu build */
michael@0:     return FALSE;
michael@0: #endif
michael@0: }
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_arm_iwmmxt (void)
michael@0: {
michael@0: #if defined(USE_ARM_IWMMXT)
michael@0:     return FALSE;
michael@0: #else
michael@0:     return FALSE;
michael@0: #endif
michael@0: }
michael@0: 
michael@0: #elif defined (__linux__) || defined(__ANDROID__) || defined(ANDROID) /* linux ELF or ANDROID */
michael@0: 
michael@0: static pixman_bool_t arm_has_v7 = FALSE;
michael@0: static pixman_bool_t arm_has_v6 = FALSE;
michael@0: static pixman_bool_t arm_has_vfp = FALSE;
michael@0: static pixman_bool_t arm_has_neon = FALSE;
michael@0: static pixman_bool_t arm_has_iwmmxt = FALSE;
michael@0: static pixman_bool_t arm_tests_initialized = FALSE;
michael@0: 
michael@0: #if defined(__ANDROID__) || defined(ANDROID) /* Android device support */
michael@0: 
michael@0: static void
michael@0: pixman_arm_read_auxv_or_cpu_features ()
michael@0: {
michael@0:     char buf[1024];
michael@0:     char* pos;
michael@0:     const char* ver_token = "CPU architecture: ";
michael@0:     FILE* f = fopen("/proc/cpuinfo", "r");
michael@0:     if (!f) {
michael@0: 	arm_tests_initialized = TRUE;
michael@0: 	return;
michael@0:     }
michael@0: 
michael@0:     fread(buf, sizeof(char), sizeof(buf), f);
michael@0:     fclose(f);
michael@0:     pos = strstr(buf, ver_token);
michael@0:     if (pos) {
michael@0: 	char vchar = *(pos + strlen(ver_token));
michael@0: 	if (vchar >= '0' && vchar <= '9') {
michael@0: 	    int ver = vchar - '0';
michael@0: 	    arm_has_v7 = ver >= 7;
michael@0: 	    arm_has_v6 = ver >= 6;
michael@0: 	}
michael@0:     }
michael@0:     arm_has_neon = strstr(buf, "neon") != NULL;
michael@0:     arm_has_vfp = strstr(buf, "vfp") != NULL;
michael@0:     arm_has_iwmmxt = strstr(buf, "iwmmxt") != NULL;
michael@0:     arm_tests_initialized = TRUE;
michael@0: }
michael@0: 
michael@0: #elif defined (__linux__) /* linux ELF */
michael@0: 
michael@0: #include <unistd.h>
michael@0: #include <sys/types.h>
michael@0: #include <sys/stat.h>
michael@0: #include <sys/mman.h>
michael@0: #include <fcntl.h>
michael@0: #include <string.h>
michael@0: #include <elf.h>
michael@0: 
michael@0: static void
michael@0: pixman_arm_read_auxv_or_cpu_features ()
michael@0: {
michael@0:     int fd;
michael@0:     Elf32_auxv_t aux;
michael@0: 
michael@0:     fd = open ("/proc/self/auxv", O_RDONLY);
michael@0:     if (fd >= 0)
michael@0:     {
michael@0: 	while (read (fd, &aux, sizeof(Elf32_auxv_t)) == sizeof(Elf32_auxv_t))
michael@0: 	{
michael@0: 	    if (aux.a_type == AT_HWCAP)
michael@0: 	    {
michael@0: 		uint32_t hwcap = aux.a_un.a_val;
michael@0: 		/* hardcode these values to avoid depending on specific
michael@0: 		 * versions of the hwcap header, e.g. HWCAP_NEON
michael@0: 		 */
michael@0: 		arm_has_vfp = (hwcap & 64) != 0;
michael@0: 		arm_has_iwmmxt = (hwcap & 512) != 0;
michael@0: 		/* this flag is only present on kernel 2.6.29 */
michael@0: 		arm_has_neon = (hwcap & 4096) != 0;
michael@0: 	    }
michael@0: 	    else if (aux.a_type == AT_PLATFORM)
michael@0: 	    {
michael@0: 		const char *plat = (const char*) aux.a_un.a_val;
michael@0: 		if (strncmp (plat, "v7l", 3) == 0)
michael@0: 		{
michael@0: 		    arm_has_v7 = TRUE;
michael@0: 		    arm_has_v6 = TRUE;
michael@0: 		}
michael@0: 		else if (strncmp (plat, "v6l", 3) == 0)
michael@0: 		{
michael@0: 		    arm_has_v6 = TRUE;
michael@0: 		}
michael@0: 	    }
michael@0: 	}
michael@0: 	close (fd);
michael@0:     }
michael@0: 
michael@0:     arm_tests_initialized = TRUE;
michael@0: }
michael@0: 
michael@0: #endif /* Linux elf */
michael@0: 
michael@0: #if defined(USE_ARM_SIMD)
michael@0: pixman_bool_t
michael@0: pixman_have_arm_simd (void)
michael@0: {
michael@0:     if (!arm_tests_initialized)
michael@0: 	pixman_arm_read_auxv_or_cpu_features ();
michael@0: 
michael@0:     return arm_has_v6;
michael@0: }
michael@0: 
michael@0: #endif /* USE_ARM_SIMD */
michael@0: 
michael@0: #if defined(USE_ARM_NEON)
michael@0: pixman_bool_t
michael@0: pixman_have_arm_neon (void)
michael@0: {
michael@0:     if (!arm_tests_initialized)
michael@0: 	pixman_arm_read_auxv_or_cpu_features ();
michael@0: 
michael@0:     return arm_has_neon;
michael@0: }
michael@0: 
michael@0: #endif /* USE_ARM_NEON */
michael@0: 
michael@0: #if defined(USE_ARM_IWMMXT)
michael@0: pixman_bool_t
michael@0: pixman_have_arm_iwmmxt (void)
michael@0: {
michael@0:     if (!arm_tests_initialized)
michael@0: 	pixman_arm_read_auxv_or_cpu_features ();
michael@0: 
michael@0:     return arm_has_iwmmxt;
michael@0: }
michael@0: 
michael@0: #endif /* USE_ARM_IWMMXT */
michael@0: 
michael@0: #else /* !_MSC_VER && !Linux elf && !Android */
michael@0: 
michael@0: #define pixman_have_arm_simd() FALSE
michael@0: #define pixman_have_arm_neon() FALSE
michael@0: #define pixman_have_arm_iwmmxt() FALSE
michael@0: 
michael@0: #endif
michael@0: 
michael@0: #endif /* USE_ARM_SIMD || USE_ARM_NEON || USE_ARM_IWMMXT */
michael@0: 
michael@0: #if defined(USE_MIPS_DSPR2)
michael@0: 
michael@0: #if defined (__linux__) /* linux ELF */
michael@0: 
michael@0: pixman_bool_t
michael@0: pixman_have_mips_dspr2 (void)
michael@0: {
michael@0:     const char *search_string = "MIPS 74K";
michael@0:     const char *file_name = "/proc/cpuinfo";
michael@0:     /* Simple detection of MIPS DSP ASE (revision 2) at runtime for Linux.
michael@0:      * It is based on /proc/cpuinfo, which reveals hardware configuration
michael@0:      * to user-space applications.  According to MIPS (early 2010), no similar
michael@0:      * facility is universally available on the MIPS architectures, so it's up
michael@0:      * to individual OSes to provide such.
michael@0:      *
michael@0:      * Only currently available MIPS core that supports DSPr2 is 74K.
michael@0:      */
michael@0: 
michael@0:     char cpuinfo_line[256];
michael@0: 
michael@0:     FILE *f = NULL;
michael@0: 
michael@0:     if ((f = fopen (file_name, "r")) == NULL)
michael@0:         return FALSE;
michael@0: 
michael@0:     while (fgets (cpuinfo_line, sizeof (cpuinfo_line), f) != NULL)
michael@0:     {
michael@0:         if (strstr (cpuinfo_line, search_string) != NULL)
michael@0:         {
michael@0:             fclose (f);
michael@0:             return TRUE;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     fclose (f);
michael@0: 
michael@0:     /* Did not find string in the proc file. */
michael@0:     return FALSE;
michael@0: }
michael@0: 
michael@0: #else /* linux ELF */
michael@0: 
michael@0: #define pixman_have_mips_dspr2() FALSE
michael@0: 
michael@0: #endif /* linux ELF */
michael@0: 
michael@0: #endif /* USE_MIPS_DSPR2 */
michael@0: 
michael@0: #if defined(USE_X86_MMX) || defined(USE_SSE2)
michael@0: /* The CPU detection code needs to be in a file not compiled with
michael@0:  * "-mmmx -msse", as gcc would generate CMOV instructions otherwise
michael@0:  * that would lead to SIGILL instructions on old CPUs that don't have
michael@0:  * it.
michael@0:  */
michael@0: #if !defined(__amd64__) && !defined(__x86_64__) && !defined(_M_AMD64)
michael@0: 
michael@0: #ifdef HAVE_GETISAX
michael@0: #include <sys/auxv.h>
michael@0: #endif
michael@0: 
michael@0: typedef enum
michael@0: {
michael@0:     NO_FEATURES = 0,
michael@0:     MMX = 0x1,
michael@0:     MMX_EXTENSIONS = 0x2,
michael@0:     SSE = 0x6,
michael@0:     SSE2 = 0x8,
michael@0:     CMOV = 0x10
michael@0: } cpu_features_t;
michael@0: 
michael@0: 
michael@0: static unsigned int
michael@0: detect_cpu_features (void)
michael@0: {
michael@0:     unsigned int features = 0;
michael@0:     unsigned int result = 0;
michael@0: 
michael@0: #ifdef HAVE_GETISAX
michael@0:     if (getisax (&result, 1))
michael@0:     {
michael@0: 	if (result & AV_386_CMOV)
michael@0: 	    features |= CMOV;
michael@0: 	if (result & AV_386_MMX)
michael@0: 	    features |= MMX;
michael@0: 	if (result & AV_386_AMD_MMX)
michael@0: 	    features |= MMX_EXTENSIONS;
michael@0: 	if (result & AV_386_SSE)
michael@0: 	    features |= SSE;
michael@0: 	if (result & AV_386_SSE2)
michael@0: 	    features |= SSE2;
michael@0:     }
michael@0: #else
michael@0:     char vendor[13];
michael@0: #ifdef _MSC_VER
michael@0:     int vendor0 = 0, vendor1, vendor2;
michael@0: #endif
michael@0:     vendor[0] = 0;
michael@0:     vendor[12] = 0;
michael@0: 
michael@0: #ifdef __GNUC__
michael@0:     /* see p. 118 of amd64 instruction set manual Vol3 */
michael@0:     /* We need to be careful about the handling of %ebx and
michael@0:      * %esp here. We can't declare either one as clobbered
michael@0:      * since they are special registers (%ebx is the "PIC
michael@0:      * register" holding an offset to global data, %esp the
michael@0:      * stack pointer), so we need to make sure they have their
michael@0:      * original values when we access the output operands.
michael@0:      */
michael@0:     __asm__ (
michael@0:         "pushf\n"
michael@0:         "pop %%eax\n"
michael@0:         "mov %%eax, %%ecx\n"
michael@0:         "xor $0x00200000, %%eax\n"
michael@0:         "push %%eax\n"
michael@0:         "popf\n"
michael@0:         "pushf\n"
michael@0:         "pop %%eax\n"
michael@0:         "mov $0x0, %%edx\n"
michael@0:         "xor %%ecx, %%eax\n"
michael@0:         "jz 1f\n"
michael@0: 
michael@0:         "mov $0x00000000, %%eax\n"
michael@0:         "push %%ebx\n"
michael@0:         "cpuid\n"
michael@0:         "mov %%ebx, %%eax\n"
michael@0:         "pop %%ebx\n"
michael@0:         "mov %%eax, %1\n"
michael@0:         "mov %%edx, %2\n"
michael@0:         "mov %%ecx, %3\n"
michael@0:         "mov $0x00000001, %%eax\n"
michael@0:         "push %%ebx\n"
michael@0:         "cpuid\n"
michael@0:         "pop %%ebx\n"
michael@0:         "1:\n"
michael@0:         "mov %%edx, %0\n"
michael@0: 	: "=r" (result),
michael@0:         "=m" (vendor[0]),
michael@0:         "=m" (vendor[4]),
michael@0:         "=m" (vendor[8])
michael@0: 	:
michael@0: 	: "%eax", "%ecx", "%edx"
michael@0:         );
michael@0: 
michael@0: #elif defined (_MSC_VER)
michael@0: 
michael@0:     _asm {
michael@0: 	pushfd
michael@0: 	pop eax
michael@0: 	mov ecx, eax
michael@0: 	xor eax, 00200000h
michael@0: 	push eax
michael@0: 	popfd
michael@0: 	pushfd
michael@0: 	pop eax
michael@0: 	mov edx, 0
michael@0: 	xor eax, ecx
michael@0: 	jz nocpuid
michael@0: 
michael@0: 	mov eax, 0
michael@0: 	push ebx
michael@0: 	cpuid
michael@0: 	mov eax, ebx
michael@0: 	pop ebx
michael@0: 	mov vendor0, eax
michael@0: 	mov vendor1, edx
michael@0: 	mov vendor2, ecx
michael@0: 	mov eax, 1
michael@0: 	push ebx
michael@0: 	cpuid
michael@0: 	pop ebx
michael@0:     nocpuid:
michael@0: 	mov result, edx
michael@0:     }
michael@0:     memmove (vendor + 0, &vendor0, 4);
michael@0:     memmove (vendor + 4, &vendor1, 4);
michael@0:     memmove (vendor + 8, &vendor2, 4);
michael@0: 
michael@0: #else
michael@0: #   error unsupported compiler
michael@0: #endif
michael@0: 
michael@0:     features = 0;
michael@0:     if (result)
michael@0:     {
michael@0: 	/* result now contains the standard feature bits */
michael@0: 	if (result & (1 << 15))
michael@0: 	    features |= CMOV;
michael@0: 	if (result & (1 << 23))
michael@0: 	    features |= MMX;
michael@0: 	if (result & (1 << 25))
michael@0: 	    features |= SSE;
michael@0: 	if (result & (1 << 26))
michael@0: 	    features |= SSE2;
michael@0: 	if ((features & MMX) && !(features & SSE) &&
michael@0: 	    (strcmp (vendor, "AuthenticAMD") == 0 ||
michael@0: 	     strcmp (vendor, "Geode by NSC") == 0))
michael@0: 	{
michael@0: 	    /* check for AMD MMX extensions */
michael@0: #ifdef __GNUC__
michael@0: 	    __asm__ (
michael@0: 	        "	push %%ebx\n"
michael@0: 	        "	mov $0x80000000, %%eax\n"
michael@0: 	        "	cpuid\n"
michael@0: 	        "	xor %%edx, %%edx\n"
michael@0: 	        "	cmp $0x1, %%eax\n"
michael@0: 	        "	jge 2f\n"
michael@0: 	        "	mov $0x80000001, %%eax\n"
michael@0: 	        "	cpuid\n"
michael@0: 	        "2:\n"
michael@0: 	        "	pop %%ebx\n"
michael@0: 	        "	mov %%edx, %0\n"
michael@0: 		: "=r" (result)
michael@0: 		:
michael@0: 		: "%eax", "%ecx", "%edx"
michael@0: 	        );
michael@0: #elif defined _MSC_VER
michael@0: 	    _asm {
michael@0: 		push ebx
michael@0: 		mov eax, 80000000h
michael@0: 		cpuid
michael@0: 		xor edx, edx
michael@0: 		cmp eax, 1
michael@0: 		jge notamd
michael@0: 		mov eax, 80000001h
michael@0: 		cpuid
michael@0: 	    notamd:
michael@0: 		pop ebx
michael@0: 		mov result, edx
michael@0: 	    }
michael@0: #endif
michael@0: 	    if (result & (1 << 22))
michael@0: 		features |= MMX_EXTENSIONS;
michael@0: 	}
michael@0:     }
michael@0: #endif /* HAVE_GETISAX */
michael@0: 
michael@0:     return features;
michael@0: }
michael@0: 
michael@0: #ifdef USE_X86_MMX
michael@0: static pixman_bool_t
michael@0: pixman_have_mmx (void)
michael@0: {
michael@0:     static pixman_bool_t initialized = FALSE;
michael@0:     static pixman_bool_t mmx_present;
michael@0: 
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	unsigned int features = detect_cpu_features ();
michael@0: 	mmx_present = (features & (MMX | MMX_EXTENSIONS)) == (MMX | MMX_EXTENSIONS);
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0: 
michael@0:     return mmx_present;
michael@0: }
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_SSE2
michael@0: static pixman_bool_t
michael@0: pixman_have_sse2 (void)
michael@0: {
michael@0:     static pixman_bool_t initialized = FALSE;
michael@0:     static pixman_bool_t sse2_present;
michael@0: 
michael@0:     if (!initialized)
michael@0:     {
michael@0: 	unsigned int features = detect_cpu_features ();
michael@0: 	sse2_present = (features & (MMX | MMX_EXTENSIONS | SSE | SSE2)) == (MMX | MMX_EXTENSIONS | SSE | SSE2);
michael@0: 	initialized = TRUE;
michael@0:     }
michael@0: 
michael@0:     return sse2_present;
michael@0: }
michael@0: 
michael@0: #endif
michael@0: 
michael@0: #else /* __amd64__ */
michael@0: #ifdef USE_X86_MMX
michael@0: #define pixman_have_mmx() TRUE
michael@0: #endif
michael@0: #ifdef USE_SSE2
michael@0: #define pixman_have_sse2() TRUE
michael@0: #endif
michael@0: #endif /* __amd64__ */
michael@0: #endif
michael@0: 
michael@0: static pixman_bool_t
michael@0: disabled (const char *name)
michael@0: {
michael@0:     const char *env;
michael@0: 
michael@0:     if ((env = getenv ("PIXMAN_DISABLE")))
michael@0:     {
michael@0: 	do
michael@0: 	{
michael@0: 	    const char *end;
michael@0: 	    int len;
michael@0: 
michael@0: 	    if ((end = strchr (env, ' ')))
michael@0: 		len = end - env;
michael@0: 	    else
michael@0: 		len = strlen (env);
michael@0: 
michael@0: 	    if (strlen (name) == len && strncmp (name, env, len) == 0)
michael@0: 	    {
michael@0: 		printf ("pixman: Disabled %s implementation\n", name);
michael@0: 		return TRUE;
michael@0: 	    }
michael@0: 
michael@0: 	    env += len;
michael@0: 	}
michael@0: 	while (*env++);
michael@0:     }
michael@0: 
michael@0:     return FALSE;
michael@0: }
michael@0: 
michael@0: pixman_implementation_t *
michael@0: _pixman_choose_implementation (void)
michael@0: {
michael@0:     pixman_implementation_t *imp;
michael@0: 
michael@0:     imp = _pixman_implementation_create_general();
michael@0: 
michael@0:     if (!disabled ("fast"))
michael@0: 	imp = _pixman_implementation_create_fast_path (imp);
michael@0: 
michael@0: #ifdef USE_X86_MMX
michael@0:     if (!disabled ("mmx") && pixman_have_mmx ())
michael@0: 	imp = _pixman_implementation_create_mmx (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_SSE2
michael@0:     if (!disabled ("sse2") && pixman_have_sse2 ())
michael@0: 	imp = _pixman_implementation_create_sse2 (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_ARM_SIMD
michael@0:     if (!disabled ("arm-simd") && pixman_have_arm_simd ())
michael@0: 	imp = _pixman_implementation_create_arm_simd (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_ARM_IWMMXT
michael@0:     if (!disabled ("arm-iwmmxt") && pixman_have_arm_iwmmxt ())
michael@0: 	imp = _pixman_implementation_create_mmx (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_ARM_NEON
michael@0:     if (!disabled ("arm-neon") && pixman_have_arm_neon ())
michael@0: 	imp = _pixman_implementation_create_arm_neon (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_MIPS_DSPR2
michael@0:     if (!disabled ("mips-dspr2") && pixman_have_mips_dspr2 ())
michael@0: 	imp = _pixman_implementation_create_mips_dspr2 (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_VMX
michael@0:     if (!disabled ("vmx") && pixman_have_vmx ())
michael@0: 	imp = _pixman_implementation_create_vmx (imp);
michael@0: #endif
michael@0: 
michael@0:     imp = _pixman_implementation_create_noop (imp);
michael@0: 
michael@0:     return imp;
michael@0: }
michael@0: