cpu: split flag checks per arch in av_cpu_max_align()

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

libavutil/aarch64/cpu.c

@@ -26,3 +26,12 @@ int ff_get_cpu_flags_aarch64(void)
            AV_CPU_FLAG_NEON  * HAVE_NEON  |
            AV_CPU_FLAG_VFP   * HAVE_VFP;
 }
+
+size_t ff_get_cpu_max_align_aarch64(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_NEON)
+        return 16;
+    return 8;
+}

libavutil/arm/cpu.c

@@ -151,3 +151,12 @@ int ff_get_cpu_flags_arm(void)
 }
 
 #endif
+
+size_t ff_get_cpu_max_align_arm(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_NEON)
+        return 16;
+    return 8;
+}

libavutil/cpu.c

@@ -184,12 +184,13 @@ int av_cpu_count(void)
 
 size_t av_cpu_max_align(void)
 {
-    int flags = av_get_cpu_flags();
-
-    if (flags & AV_CPU_FLAG_AVX)
-        return 32;
-    if (flags & (AV_CPU_FLAG_ALTIVEC | AV_CPU_FLAG_SSE | AV_CPU_FLAG_NEON))
-        return 16;
-
+    if (ARCH_AARCH64)
+        return ff_get_cpu_max_align_aarch64();
+    if (ARCH_ARM)
+        return ff_get_cpu_max_align_arm();
+    if (ARCH_PPC)
+        return ff_get_cpu_max_align_ppc();
+    if (ARCH_X86)
+        return ff_get_cpu_max_align_x86();
     return 8;
 }

libavutil/cpu_internal.h

@@ -41,4 +41,9 @@ int ff_get_cpu_flags_arm(void);
 int ff_get_cpu_flags_ppc(void);
 int ff_get_cpu_flags_x86(void);
 
+size_t ff_get_cpu_max_align_aarch64(void);
+size_t ff_get_cpu_max_align_arm(void);
+size_t ff_get_cpu_max_align_ppc(void);
+size_t ff_get_cpu_max_align_x86(void);
+
 #endif /* AVUTIL_CPU_INTERNAL_H */

libavutil/ppc/cpu.c

@@ -142,3 +142,12 @@ out:
 #endif /* HAVE_ALTIVEC */
     return 0;
 }
+
+size_t ff_get_cpu_max_align_ppc(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_ALTIVEC)
+        return 16;
+    return 8;
+}

libavutil/x86/cpu.c

@@ -233,3 +233,14 @@ int ff_get_cpu_flags_x86(void)
 
     return rval;
 }
+
+size_t ff_get_cpu_max_align_x86(void)
+{
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_AVX)
+        return 32;
+    if (flags & AV_CPU_FLAG_SSE)
+        return 16;
+    return 8;
+}