Use register writes in the Altivec code for stores because Altivec's handling

for unaligned writes is messy as hell.

If writes are batched this is somewhat easier to deal with (somewhat).

1 files changed, 16 insertions, 7 deletions

diff --git a/src/utils/simd_32/simd_altivec.h b/src/utils/simd_32/simd_altivec.h
index a925f6dbc..e63b9bdcc 100644
--- a/src/utils/simd_32/simd_altivec.h
+++ b/src/utils/simd_32/simd_altivec.h
@@ -65,21 +65,30 @@ class SIMD_Altivec
 
       void store_le(byte out[]) const
          {
-         u32bit* out_32 = reinterpret_cast<u32bit*>(out);
-
-         __vector unsigned char perm = vec_lvsl(0, (int*)0);
+         __vector unsigned char perm = vec_lvsl(0, (u32bit*)0);
 
          perm = vec_xor(perm, vec_splat_u8(3));
 
-         __vector unsigned int swapped = vec_perm(reg, reg, perm);
+         union {
+            __vector unsigned int V;
+            u32bit R[4];
+            } vec;
+
+         vec.V = vec_perm(reg, reg, perm);
 
-         vec_st(swapped, 0, out_32);
+         Botan::store_be(out, vec.R[0], vec.R[1], vec.R[2], vec.R[3]);
          }
 
       void store_be(byte out[]) const
          {
-         u32bit* out_32 = reinterpret_cast<u32bit*>(out);
-         vec_st(reg, 0, out_32);
+         union {
+            __vector unsigned int V;
+            u32bit R[4];
+            } vec;
+
+         vec.V = reg;
+
+         Botan::store_be(out, vec.R[0], vec.R[1], vec.R[2], vec.R[3]);
          }
 
       void rotate_left(u32bit rot)