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-rw-r--r--pixman/pixman/pixman-mmx.c13
-rw-r--r--pixman/pixman/pixman-x86.c337
2 files changed, 157 insertions, 193 deletions
diff --git a/pixman/pixman/pixman-mmx.c b/pixman/pixman/pixman-mmx.c
index 3b04199ca..dfca50954 100644
--- a/pixman/pixman/pixman-mmx.c
+++ b/pixman/pixman/pixman-mmx.c
@@ -105,8 +105,17 @@ _mm_shuffle_pi16 (__m64 __A, int8_t const __N)
return ret;
}
# else
-# define _mm_shuffle_pi16(A, N) \
- ((__m64) __builtin_ia32_pshufw ((__v4hi)(__m64)(A), (int)(N)))
+# define _mm_shuffle_pi16(A, N) \
+ ({ \
+ __m64 ret; \
+ \
+ asm ("pshufw %2, %1, %0\n\t" \
+ : "=y" (ret) \
+ : "y" (A), "K" ((const int8_t)N) \
+ ); \
+ \
+ ret; \
+ })
# endif
# endif
diff --git a/pixman/pixman/pixman-x86.c b/pixman/pixman/pixman-x86.c
index 52ad3dfd5..57e4d1f35 100644
--- a/pixman/pixman/pixman-x86.c
+++ b/pixman/pixman/pixman-x86.c
@@ -32,249 +32,204 @@
* that would lead to SIGILL instructions on old CPUs that don't have
* it.
*/
-#if !defined(__amd64__) && !defined(__x86_64__) && !defined(_M_AMD64)
-
-#ifdef HAVE_GETISAX
-#include <sys/auxv.h>
-#endif
typedef enum
{
- NO_FEATURES = 0,
- MMX = 0x1,
- MMX_EXTENSIONS = 0x2,
- SSE = 0x6,
- SSE2 = 0x8,
- CMOV = 0x10
+ X86_MMX = (1 << 0),
+ X86_MMX_EXTENSIONS = (1 << 1),
+ X86_SSE = (1 << 2) | X86_MMX_EXTENSIONS,
+ X86_SSE2 = (1 << 3),
+ X86_CMOV = (1 << 4)
} cpu_features_t;
+#ifdef HAVE_GETISAX
-static unsigned int
+#include <sys/auxv.h>
+
+static cpu_features_t
detect_cpu_features (void)
{
- unsigned int features = 0;
+ cpu_features_t features = 0;
unsigned int result = 0;
-
-#ifdef HAVE_GETISAX
+
if (getisax (&result, 1))
{
if (result & AV_386_CMOV)
- features |= CMOV;
+ features |= X86_CMOV;
if (result & AV_386_MMX)
- features |= MMX;
+ features |= X86_MMX;
if (result & AV_386_AMD_MMX)
- features |= MMX_EXTENSIONS;
+ features |= X86_MMX_EXTENSIONS;
if (result & AV_386_SSE)
- features |= SSE;
+ features |= X86_SSE;
if (result & AV_386_SSE2)
- features |= SSE2;
+ features |= X86_SSE2;
}
+
+ return features;
+}
+
+#else
+
+#define _PIXMAN_X86_64 \
+ (defined(__amd64__) || defined(__x86_64__) || defined(_M_AMD64))
+
+static pixman_bool_t
+have_cpuid (void)
+{
+#if _PIXMAN_X86_64 || defined (_MSC_VER)
+
+ return TRUE;
+
+#elif defined (__GNUC__)
+ uint32_t result;
+
+ __asm__ volatile (
+ "pushf" "\n\t"
+ "pop %%eax" "\n\t"
+ "mov %%eax, %%ecx" "\n\t"
+ "xor $0x00200000, %%eax" "\n\t"
+ "push %%eax" "\n\t"
+ "popf" "\n\t"
+ "pushf" "\n\t"
+ "pop %%eax" "\n\t"
+ "xor %%ecx, %%eax" "\n\t"
+ "mov %%eax, %0" "\n\t"
+ : "=r" (result)
+ :
+ : "%eax", "%ecx");
+
+ return !!result;
+
#else
- char vendor[13];
-#ifdef _MSC_VER
- int vendor0 = 0, vendor1, vendor2;
+#error "Unknown compiler"
#endif
- vendor[0] = 0;
- vendor[12] = 0;
-
-#ifdef __GNUC__
- /* see p. 118 of amd64 instruction set manual Vol3 */
- /* We need to be careful about the handling of %ebx and
- * %esp here. We can't declare either one as clobbered
+}
+
+static void
+pixman_cpuid (uint32_t feature,
+ uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d)
+{
+#if defined (__GNUC__)
+
+#if _PIXMAN_X86_64
+ __asm__ volatile (
+ "cpuid" "\n\t"
+ : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d)
+ : "a" (feature));
+#else
+ /* On x86-32 we need to be careful about the handling of %ebx
+ * and %esp. We can't declare either one as clobbered
* since they are special registers (%ebx is the "PIC
* register" holding an offset to global data, %esp the
- * stack pointer), so we need to make sure they have their
- * original values when we access the output operands.
+ * stack pointer), so we need to make sure that %ebx is
+ * preserved, and that %esp has its original value when
+ * accessing the output operands.
*/
- __asm__ (
- "pushf\n"
- "pop %%eax\n"
- "mov %%eax, %%ecx\n"
- "xor $0x00200000, %%eax\n"
- "push %%eax\n"
- "popf\n"
- "pushf\n"
- "pop %%eax\n"
- "mov $0x0, %%edx\n"
- "xor %%ecx, %%eax\n"
- "jz 1f\n"
-
- "mov $0x00000000, %%eax\n"
- "push %%ebx\n"
- "cpuid\n"
- "mov %%ebx, %%eax\n"
- "pop %%ebx\n"
- "mov %%eax, %1\n"
- "mov %%edx, %2\n"
- "mov %%ecx, %3\n"
- "mov $0x00000001, %%eax\n"
- "push %%ebx\n"
- "cpuid\n"
- "pop %%ebx\n"
- "1:\n"
- "mov %%edx, %0\n"
- : "=r" (result),
- "=m" (vendor[0]),
- "=m" (vendor[4]),
- "=m" (vendor[8])
- :
- : "%eax", "%ecx", "%edx"
- );
-
+ __asm__ volatile (
+ "xchg %%ebx, %1" "\n\t"
+ "cpuid" "\n\t"
+ "xchg %%ebx, %1" "\n\t"
+ : "=a" (*a), "=r" (*b), "=c" (*c), "=d" (*d)
+ : "a" (feature));
+#endif
+
#elif defined (_MSC_VER)
-
- _asm {
- pushfd
- pop eax
- mov ecx, eax
- xor eax, 00200000h
- push eax
- popfd
- pushfd
- pop eax
- mov edx, 0
- xor eax, ecx
- jz nocpuid
-
- mov eax, 0
- push ebx
- cpuid
- mov eax, ebx
- pop ebx
- mov vendor0, eax
- mov vendor1, edx
- mov vendor2, ecx
- mov eax, 1
- push ebx
- cpuid
- pop ebx
- nocpuid:
- mov result, edx
- }
- memmove (vendor + 0, &vendor0, 4);
- memmove (vendor + 4, &vendor1, 4);
- memmove (vendor + 8, &vendor2, 4);
-
+ int info[4];
+
+ __cpuid (info, feature);
+
+ *a = info[0];
+ *b = info[1];
+ *c = info[2];
+ *d = info[3];
#else
-# error unsupported compiler
+#error Unknown compiler
#endif
-
- features = 0;
- if (result)
+}
+
+static cpu_features_t
+detect_cpu_features (void)
+{
+ uint32_t a, b, c, d;
+ cpu_features_t features = 0;
+
+ if (!have_cpuid())
+ return features;
+
+ /* Get feature bits */
+ pixman_cpuid (0x01, &a, &b, &c, &d);
+ if (d & (1 << 15))
+ features |= X86_CMOV;
+ if (d & (1 << 23))
+ features |= X86_MMX;
+ if (d & (1 << 25))
+ features |= X86_SSE;
+ if (d & (1 << 26))
+ features |= X86_SSE2;
+
+ /* Check for AMD specific features */
+ if ((features & X86_MMX) && !(features & X86_SSE))
{
- /* result now contains the standard feature bits */
- if (result & (1 << 15))
- features |= CMOV;
- if (result & (1 << 23))
- features |= MMX;
- if (result & (1 << 25))
- features |= SSE;
- if (result & (1 << 26))
- features |= SSE2;
- if ((features & MMX) && !(features & SSE) &&
- (strcmp (vendor, "AuthenticAMD") == 0 ||
- strcmp (vendor, "Geode by NSC") == 0))
+ char vendor[13];
+
+ /* Get vendor string */
+ memset (vendor, 0, sizeof vendor);
+
+ pixman_cpuid (0x00, &a, &b, &c, &d);
+ memcpy (vendor + 0, &b, 4);
+ memcpy (vendor + 4, &d, 4);
+ memcpy (vendor + 8, &c, 4);
+
+ if (strcmp (vendor, "AuthenticAMD") == 0 ||
+ strcmp (vendor, "Geode by NSC") == 0)
{
- /* check for AMD MMX extensions */
-#ifdef __GNUC__
- __asm__ (
- " push %%ebx\n"
- " mov $0x80000000, %%eax\n"
- " cpuid\n"
- " xor %%edx, %%edx\n"
- " cmp $0x1, %%eax\n"
- " jge 2f\n"
- " mov $0x80000001, %%eax\n"
- " cpuid\n"
- "2:\n"
- " pop %%ebx\n"
- " mov %%edx, %0\n"
- : "=r" (result)
- :
- : "%eax", "%ecx", "%edx"
- );
-#elif defined _MSC_VER
- _asm {
- push ebx
- mov eax, 80000000h
- cpuid
- xor edx, edx
- cmp eax, 1
- jge notamd
- mov eax, 80000001h
- cpuid
- notamd:
- pop ebx
- mov result, edx
- }
-#endif
- if (result & (1 << 22))
- features |= MMX_EXTENSIONS;
+ pixman_cpuid (0x80000000, &a, &b, &c, &d);
+ if (a >= 0x80000001)
+ {
+ pixman_cpuid (0x80000001, &a, &b, &c, &d);
+
+ if (d & (1 << 22))
+ features |= X86_MMX_EXTENSIONS;
+ }
}
}
-#endif /* HAVE_GETISAX */
-
+
return features;
}
-#ifdef USE_X86_MMX
-static pixman_bool_t
-pixman_have_mmx (void)
-{
- static pixman_bool_t initialized = FALSE;
- static pixman_bool_t mmx_present;
-
- if (!initialized)
- {
- unsigned int features = detect_cpu_features ();
- mmx_present = (features & (MMX | MMX_EXTENSIONS)) == (MMX | MMX_EXTENSIONS);
- initialized = TRUE;
- }
-
- return mmx_present;
-}
#endif
-#ifdef USE_SSE2
static pixman_bool_t
-pixman_have_sse2 (void)
+have_feature (cpu_features_t feature)
{
- static pixman_bool_t initialized = FALSE;
- static pixman_bool_t sse2_present;
-
+ static pixman_bool_t initialized;
+ static cpu_features_t features;
+
if (!initialized)
{
- unsigned int features = detect_cpu_features ();
- sse2_present = (features & (MMX | MMX_EXTENSIONS | SSE | SSE2)) == (MMX | MMX_EXTENSIONS | SSE | SSE2);
+ features = detect_cpu_features();
initialized = TRUE;
}
-
- return sse2_present;
-}
-#endif
-
-#else /* __amd64__ */
-#ifdef USE_X86_MMX
-#define pixman_have_mmx() TRUE
-#endif
-#ifdef USE_SSE2
-#define pixman_have_sse2() TRUE
-#endif
-#endif /* __amd64__ */
+ return (features & feature) == feature;
+}
#endif
pixman_implementation_t *
_pixman_x86_get_implementations (pixman_implementation_t *imp)
{
+#define MMX_BITS (X86_MMX | X86_MMX_EXTENSIONS)
+#define SSE2_BITS (X86_MMX | X86_MMX_EXTENSIONS | X86_SSE | X86_SSE2)
+
#ifdef USE_X86_MMX
- if (!_pixman_disabled ("mmx") && pixman_have_mmx())
+ if (!_pixman_disabled ("mmx") && have_feature (MMX_BITS))
imp = _pixman_implementation_create_mmx (imp);
#endif
#ifdef USE_SSE2
- if (!_pixman_disabled ("sse2") && pixman_have_sse2())
+ if (!_pixman_disabled ("sse2") && have_feature (SSE2_BITS))
imp = _pixman_implementation_create_sse2 (imp);
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 02:14:08 +0000