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-rw-r--r--clang/lib/Headers/altivec.h130
1 files changed, 109 insertions, 21 deletions
diff --git a/clang/lib/Headers/altivec.h b/clang/lib/Headers/altivec.h
index 74ce08aa6fe..252d3fbba6d 100644
--- a/clang/lib/Headers/altivec.h
+++ b/clang/lib/Headers/altivec.h
@@ -73,6 +73,9 @@ vec_perm(vector bool int __a, vector bool int __b, vector unsigned char __c);
static vector float __ATTRS_o_ai
vec_perm(vector float __a, vector float __b, vector unsigned char __c);
+static vector unsigned char __ATTRS_o_ai
+vec_xor(vector unsigned char __a, vector unsigned char __b);
+
/* vec_abs */
#define __builtin_altivec_abs_v16qi vec_abs
@@ -4281,11 +4284,27 @@ vec_vpkswus(vector unsigned int __a, vector unsigned int __b)
/* vec_perm */
+// The vperm instruction is defined architecturally with a big-endian bias.
+// For little endian, we swap the input operands and invert the permute
+// control vector. Only the rightmost 5 bits matter, so we could use
+// a vector of all 31s instead of all 255s to perform the inversion.
+// However, when the PCV is not a constant, using 255 has an advantage
+// in that the vec_xor can be recognized as a vec_nor (and for P8 and
+// later, possibly a vec_nand).
+
vector signed char __ATTRS_o_ai
vec_perm(vector signed char __a, vector signed char __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector signed char)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector signed char)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector unsigned char __ATTRS_o_ai
@@ -4293,22 +4312,46 @@ vec_perm(vector unsigned char __a,
vector unsigned char __b,
vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector unsigned char)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector unsigned char)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector bool char __ATTRS_o_ai
vec_perm(vector bool char __a, vector bool char __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector bool char)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector bool char)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector short __ATTRS_o_ai
vec_perm(vector short __a, vector short __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector short)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector short)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector unsigned short __ATTRS_o_ai
@@ -4316,49 +4359,104 @@ vec_perm(vector unsigned short __a,
vector unsigned short __b,
vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector unsigned short)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector unsigned short)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector bool short __ATTRS_o_ai
vec_perm(vector bool short __a, vector bool short __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector bool short)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector bool short)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector pixel __ATTRS_o_ai
vec_perm(vector pixel __a, vector pixel __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector pixel)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector pixel)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector int __ATTRS_o_ai
vec_perm(vector int __a, vector int __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector int)__builtin_altivec_vperm_4si(__b, __a, __d);
+#else
return (vector int)__builtin_altivec_vperm_4si(__a, __b, __c);
+#endif
}
vector unsigned int __ATTRS_o_ai
vec_perm(vector unsigned int __a, vector unsigned int __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector unsigned int)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector unsigned int)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector bool int __ATTRS_o_ai
vec_perm(vector bool int __a, vector bool int __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector bool int)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector bool int)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
vector float __ATTRS_o_ai
vec_perm(vector float __a, vector float __b, vector unsigned char __c)
{
+#ifdef __LITTLE_ENDIAN__
+ vector unsigned char __d = {255,255,255,255,255,255,255,255,
+ 255,255,255,255,255,255,255,255};
+ __d = vec_xor(__c, __d);
+ return (vector float)
+ __builtin_altivec_vperm_4si((vector int)__b, (vector int)__a, __d);
+#else
return (vector float)
__builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+#endif
}
/* vec_vperm */
@@ -4366,8 +4464,7 @@ vec_perm(vector float __a, vector float __b, vector unsigned char __c)
static vector signed char __ATTRS_o_ai
vec_vperm(vector signed char __a, vector signed char __b, vector unsigned char __c)
{
- return (vector signed char)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector unsigned char __ATTRS_o_ai
@@ -4375,22 +4472,19 @@ vec_vperm(vector unsigned char __a,
vector unsigned char __b,
vector unsigned char __c)
{
- return (vector unsigned char)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector bool char __ATTRS_o_ai
vec_vperm(vector bool char __a, vector bool char __b, vector unsigned char __c)
{
- return (vector bool char)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector short __ATTRS_o_ai
vec_vperm(vector short __a, vector short __b, vector unsigned char __c)
{
- return (vector short)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector unsigned short __ATTRS_o_ai
@@ -4398,49 +4492,43 @@ vec_vperm(vector unsigned short __a,
vector unsigned short __b,
vector unsigned char __c)
{
- return (vector unsigned short)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector bool short __ATTRS_o_ai
vec_vperm(vector bool short __a, vector bool short __b, vector unsigned char __c)
{
- return (vector bool short)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector pixel __ATTRS_o_ai
vec_vperm(vector pixel __a, vector pixel __b, vector unsigned char __c)
{
- return (vector pixel)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector int __ATTRS_o_ai
vec_vperm(vector int __a, vector int __b, vector unsigned char __c)
{
- return (vector int)__builtin_altivec_vperm_4si(__a, __b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector unsigned int __ATTRS_o_ai
vec_vperm(vector unsigned int __a, vector unsigned int __b, vector unsigned char __c)
{
- return (vector unsigned int)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector bool int __ATTRS_o_ai
vec_vperm(vector bool int __a, vector bool int __b, vector unsigned char __c)
{
- return (vector bool int)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
static vector float __ATTRS_o_ai
vec_vperm(vector float __a, vector float __b, vector unsigned char __c)
{
- return (vector float)
- __builtin_altivec_vperm_4si((vector int)__a, (vector int)__b, __c);
+ return vec_perm(__a, __b, __c);
}
/* vec_re */
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