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diff --git a/libgimpbase/gimpcpuaccel.h b/libgimpbase/gimpcpuaccel.h
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+++ b/libgimpbase/gimpcpuaccel.h
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_BASE_H_INSIDE__) && !defined (GIMP_BASE_COMPILATION)
+#error "Only <libgimpbase/gimpbase.h> can be included directly."
+#endif
+
+#ifndef __GIMP_CPU_ACCEL_H__
+#define __GIMP_CPU_ACCEL_H__
+
+G_BEGIN_DECLS
+
+
+/**
+ * GimpCpuAccelFlags:
+ * @GIMP_CPU_ACCEL_NONE:        None
+ * @GIMP_CPU_ACCEL_X86_MMX:     MMX
+ * @GIMP_CPU_ACCEL_X86_3DNOW:   3dNow
+ * @GIMP_CPU_ACCEL_X86_MMXEXT:  MMXEXT
+ * @GIMP_CPU_ACCEL_X86_SSE:     SSE
+ * @GIMP_CPU_ACCEL_X86_SSE2:    SSE2
+ * @GIMP_CPU_ACCEL_X86_SSE3:    SSE3
+ * @GIMP_CPU_ACCEL_X86_SSSE3:   SSSE3
+ * @GIMP_CPU_ACCEL_X86_SSE4_1:  SSE4_1
+ * @GIMP_CPU_ACCEL_X86_SSE4_2:  SSE4_2
+ * @GIMP_CPU_ACCEL_X86_AVX:     AVX
+ * @GIMP_CPU_ACCEL_PPC_ALTIVEC: Altivec
+ *
+ * Types of detectable CPU accelerations
+ **/
+typedef enum
+{
+  GIMP_CPU_ACCEL_NONE        = 0x0,
+
+  /* x86 accelerations */
+  GIMP_CPU_ACCEL_X86_MMX     = 0x80000000,
+  GIMP_CPU_ACCEL_X86_3DNOW   = 0x40000000,
+  GIMP_CPU_ACCEL_X86_MMXEXT  = 0x20000000,
+  GIMP_CPU_ACCEL_X86_SSE     = 0x10000000,
+  GIMP_CPU_ACCEL_X86_SSE2    = 0x08000000,
+  GIMP_CPU_ACCEL_X86_SSE3    = 0x02000000,
+  GIMP_CPU_ACCEL_X86_SSSE3   = 0x01000000,
+  GIMP_CPU_ACCEL_X86_SSE4_1  = 0x00800000,
+  GIMP_CPU_ACCEL_X86_SSE4_2  = 0x00400000,
+  GIMP_CPU_ACCEL_X86_AVX     = 0x00200000,
+
+  /* powerpc accelerations */
+  GIMP_CPU_ACCEL_PPC_ALTIVEC = 0x04000000
+} GimpCpuAccelFlags;
+
+
+GimpCpuAccelFlags  gimp_cpu_accel_get_support (void);
+
+
+/* for internal use only */
+void               gimp_cpu_accel_set_use     (gboolean use);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_CPU_ACCEL_H__ */