libavutil/ppc/util_altivec.h : fix load_with_perm_vec() add marcos vcswapi2s() vcswapc() VEC_SPLAT16() VEC_SLD16() for POWER LE

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/ppc/util_altivec.h

@@ -46,9 +46,21 @@
 #define WORD_s1 0x14,0x15,0x16,0x17
 #define WORD_s2 0x18,0x19,0x1a,0x1b
 #define WORD_s3 0x1c,0x1d,0x1e,0x1f
-
 #define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d}
 
+#define SWP_W2S0 0x02,0x03,0x00,0x01
+#define SWP_W2S1 0x06,0x07,0x04,0x05
+#define SWP_W2S2 0x0a,0x0b,0x08,0x09
+#define SWP_W2S3 0x0e,0x0f,0x0c,0x0d
+#define SWP_W2Ss0 0x12,0x13,0x10,0x11
+#define SWP_W2Ss1 0x16,0x17,0x14,0x15
+#define SWP_W2Ss2 0x1a,0x1b,0x18,0x19
+#define SWP_W2Ss3 0x1e,0x1f,0x1c,0x1d
+#define vcswapi2s(a,b,c,d) (const vector unsigned char){SWP_W2S ## a, SWP_W2S ## b, SWP_W2S ## c, SWP_W2S ## d}
+
+#define vcswapc() \
+  (const vector unsigned char){0x0f,0x0e,0x0d,0x0c,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00}
+
 
 // Transpose 8x8 matrix of 16-bit elements (in-place)
 #define TRANSPOSE8(a,b,c,d,e,f,g,h) \
@@ -103,8 +115,15 @@ static inline vector unsigned char unaligned_load(int offset, const uint8_t *src
     register vector unsigned char mask = vec_lvsl(offset, src);
     return vec_perm(first, second, mask);
 }
+static inline vec_u8 load_with_perm_vec(int offset, const uint8_t *src, vec_u8 perm_vec)
+{
+    vec_u8 a = vec_ld(offset, src);
+    vec_u8 b = vec_ld(offset+15, src);
+    return vec_perm(a, b, perm_vec);
+}
 #else
 #define unaligned_load(a,b) VEC_LD(a,b)
+#define load_with_perm_vec(a,b,c) VEC_LD(a,b)
 #endif
 
 
@@ -112,12 +131,6 @@ static inline vector unsigned char unaligned_load(int offset, const uint8_t *src
  * loads vector known misalignment
  * @param perm_vec the align permute vector to combine the two loads from lvsl
  */
-static inline vec_u8 load_with_perm_vec(int offset, const uint8_t *src, vec_u8 perm_vec)
-{
-    vec_u8 a = vec_ld(offset, src);
-    vec_u8 b = vec_ld(offset+15, src);
-    return vec_perm(a, b, perm_vec);
-}
 
 #define vec_unaligned_load(b)  VEC_LD(0, b)
 
@@ -135,6 +148,17 @@ static inline vec_u8 load_with_perm_vec(int offset, const uint8_t *src, vec_u8 p
 #define VEC_ST(a,b,c) vec_vsx_st(a,b,c)
 #endif
 
+#if HAVE_BIGENDIAN
+#define VEC_SPLAT16(a,b) vec_splat((vec_s16)a, b)
+#else
+#define VEC_SPLAT16(a,b) vec_splat((vec_s16)(vec_perm(a, a, vcswapi2s(0,1,2,3))), b)
+#endif
+
+#if HAVE_BIGENDIAN
+#define VEC_SLD16(a,b,c) vec_sld(a, b, c)
+#else
+#define VEC_SLD16(a,b,c) vec_sld(b, a, c)
+#endif
 
 #endif /* HAVE_ALTIVEC */