[Qemu-devel] [PATCH 22/42] target-ppc: add vs{l,r} instructions.

[Nathan Froyd]

Signed-off-by: Nathan Froyd <address@hidden>
---
 target-ppc/helper.h    |    2 ++
 target-ppc/op_helper.c |   35 +++++++++++++++++++++++++++++++++++
 target-ppc/translate.c |    2 ++
 3 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index cf2a655..5f94e9f 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -176,6 +176,8 @@ DEF_HELPER_3(vsubuws, void, avr, avr, avr)
 DEF_HELPER_3(vrlb, void, avr, avr, avr)
 DEF_HELPER_3(vrlh, void, avr, avr, avr)
 DEF_HELPER_3(vrlw, void, avr, avr, avr)
+DEF_HELPER_3(vsl, void, avr, avr, avr)
+DEF_HELPER_3(vsr, void, avr, avr, avr)
 
 DEF_HELPER_1(efscfsi, i32, i32)
 DEF_HELPER_1(efscfui, i32, i32)
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index b44a97d..7d72767 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -2264,6 +2264,41 @@ VROTATE(h, u16)
 VROTATE(w, u32)
 #undef VROTATE
 
+#if defined(WORDS_BIGENDIAN)
+#define LEFT 0
+#define RIGHT 1
+#else
+#define LEFT 1
+#define RIGHT 0
+#endif
+#define VSHIFT(suffix, leftp)                                           \
+    void helper_vs##suffix (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)   \
+    {                                                                   \
+        int shift = b->u8[LO_IDX*0x15] & 0x7;                           \
+        int doit = 1;                                                   \
+        VECTOR_FOR (u8) {                                               \
+            doit = doit && ((b->u8[i] & 0x7) == shift);                 \
+        }                                                               \
+        if (doit) {                                                     \
+            if (shift == 0) {                                           \
+                return;                                                 \
+            } else if (leftp) {                                         \
+                uint64_t carry = a->u64[LO_IDX] >> (64 - shift);        \
+                r->u64[HI_IDX] = (a->u64[HI_IDX] << shift) | carry;     \
+                r->u64[LO_IDX] <<= shift;                               \
+            } else {                                                    \
+                uint64_t carry = a->u64[HI_IDX] << (64 - shift);        \
+                r->u64[LO_IDX] = (a->u64[LO_IDX] >> shift) | carry;     \
+                r->u64[HI_IDX] >>= shift;                               \
+            }                                                           \
+        }                                                               \
+    }
+VSHIFT(l, LEFT)
+VSHIFT(r, RIGHT)
+#undef VSHIFT
+#undef LEFT
+#undef RIGHT
+
 #define VSL(suffix, element)                                            \
     void helper_vsl##suffix (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)  \
     {                                                                   \
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 5bcbeb0..c072d54 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -6290,6 +6290,8 @@ GEN_VXFORM(vsubsws, 1920);
 GEN_VXFORM(vrlb, 4);
 GEN_VXFORM(vrlh, 68);
 GEN_VXFORM(vrlw, 132);
+GEN_VXFORM(vsl, 452);
+GEN_VXFORM(vsr, 708);
 
 #define GEN_VXRFORM1(opname, name, str, xo, rc)                         \
     GEN_HANDLER2(name, str, 0x4, (xo >> 1) & 0x1f, ((xo >> 6) & 0x1f) | (rc << 
4), 0x00000000, PPC_ALTIVEC) \
-- 
1.6.0.5