Add ppc optimization for clz and fixmul

Optimize ppc/ppc64 similar to i386/x86_64, approximately doubling
encoding speed on a Power Mac G5 running OS X 10.5.8.

1 files changed, 115 insertions, 0 deletions

diff --git a/libFDK/include/ppc/fixmul_ppc.h b/libFDK/include/ppc/fixmul_ppc.h
new file mode 100644
index 0000000..9e2745c
--- /dev/null
+++ b/libFDK/include/ppc/fixmul_ppc.h
@@ -0,0 +1,115 @@
+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+  All rights reserved.
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+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
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+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
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+Attention: Audio and Multimedia Departments - FDK AAC LL
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+----------------------------------------------------------------------------------------------------------- */
+
+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+   Author(s):
+   Description: fixed point intrinsics
+
+******************************************************************************/
+
+#if defined(__powerpc__) && (defined(__GNUC__) || defined(__xlC__))
+
+#define FUNCTION_fixmuldiv2_DD
+
+#define FUNCTION_fixmuldiv2BitExact_DD
+#define fixmuldiv2BitExact_DD(a,b) fixmuldiv2_DD(a,b)
+
+#define FUNCTION_fixmulBitExact_DD
+#define fixmulBitExact_DD(a,b) fixmul_DD(a,b)
+
+#define FUNCTION_fixmuldiv2BitExact_DS
+#define fixmuldiv2BitExact_DS(a,b) fixmuldiv2_DS(a,b)
+
+#define FUNCTION_fixmulBitExact_DS
+#define fixmulBitExact_DS(a,b) fixmul_DS(a,b)
+
+
+inline INT fixmuldiv2_DD (const INT a, const INT b)
+{
+  INT result;
+  __asm__ ("mulhw %0, %1, %2" : "=r" (result) : "r" (a), "r" (b));
+  return result;
+}
+
+#endif /* __powerpc__ && (__GNUC__ || __xlC__) */