target/arm: Implement SVE reverse within elements

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180613015641.5667-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 34 insertions, 7 deletions

diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index cb7d101b57..4017b9eed1 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -238,6 +238,26 @@ static inline uint64_t expand_pred_s(uint8_t byte)
     return word[byte & 0x11];
 }
 
+/* Swap 16-bit words within a 32-bit word.  */
+static inline uint32_t hswap32(uint32_t h)
+{
+    return rol32(h, 16);
+}
+
+/* Swap 16-bit words within a 64-bit word.  */
+static inline uint64_t hswap64(uint64_t h)
+{
+    uint64_t m = 0x0000ffff0000ffffull;
+    h = rol64(h, 32);
+    return ((h & m) << 16) | ((h >> 16) & m);
+}
+
+/* Swap 32-bit words within a 64-bit word.  */
+static inline uint64_t wswap64(uint64_t h)
+{
+    return rol64(h, 32);
+}
+
 #define LOGICAL_PPPP(NAME, FUNC) \
 void HELPER(NAME)(void *vd, void *vn, void *vm, void *vg, uint32_t desc)  \
 {                                                                         \
@@ -616,6 +636,20 @@ DO_ZPZ(sve_neg_h, uint16_t, H1_2, DO_NEG)
 DO_ZPZ(sve_neg_s, uint32_t, H1_4, DO_NEG)
 DO_ZPZ_D(sve_neg_d, uint64_t, DO_NEG)
 
+DO_ZPZ(sve_revb_h, uint16_t, H1_2, bswap16)
+DO_ZPZ(sve_revb_s, uint32_t, H1_4, bswap32)
+DO_ZPZ_D(sve_revb_d, uint64_t, bswap64)
+
+DO_ZPZ(sve_revh_s, uint32_t, H1_4, hswap32)
+DO_ZPZ_D(sve_revh_d, uint64_t, hswap64)
+
+DO_ZPZ_D(sve_revw_d, uint64_t, wswap64)
+
+DO_ZPZ(sve_rbit_b, uint8_t, H1, revbit8)
+DO_ZPZ(sve_rbit_h, uint16_t, H1_2, revbit16)
+DO_ZPZ(sve_rbit_s, uint32_t, H1_4, revbit32)
+DO_ZPZ_D(sve_rbit_d, uint64_t, revbit64)
+
 /* Three-operand expander, unpredicated, in which the third operand is "wide".
  */
 #define DO_ZZW(NAME, TYPE, TYPEW, H, OP)                       \
@@ -1587,13 +1621,6 @@ void HELPER(sve_rev_b)(void *vd, void *vn, uint32_t desc)
     }
 }
 
-static inline uint64_t hswap64(uint64_t h)
-{
-    uint64_t m = 0x0000ffff0000ffffull;
-    h = rol64(h, 32);
-    return ((h & m) << 16) | ((h >> 16) & m);
-}
-
 void HELPER(sve_rev_h)(void *vd, void *vn, uint32_t desc)
 {
     intptr_t i, j, opr_sz = simd_oprsz(desc);