[Qemu-arm] [PATCH v2 54/67] target/arm: Implement SVE prefetches

[Richard Henderson]

Signed-off-by: Richard Henderson <address@hidden>
---
 target/arm/translate-sve.c |  9 +++++++++
 target/arm/sve.decode      | 23 +++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index ca49b94924..63c7a0e8d8 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -3958,3 +3958,12 @@ static void trans_ST1_zprz(DisasContext *s, arg_ST1_zprz 
*a, uint32_t insn)
     do_mem_zpz(s, a->rd, a->pg, a->rm, a->scale * a->msz,
                cpu_reg_sp(s, a->rn), fn);
 }
+
+/*
+ * Prefetches
+ */
+
+static void trans_PRF(DisasContext *s, arg_PRF *a, uint32_t insn)
+{
+    /* Prefetch is a nop within QEMU.  */
+}
diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index edd9340c02..f0144aa2d0 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -801,6 +801,29 @@ LD1RQ_zprr 1010010 .. 00 ..... 000 ... ..... ..... \
 LD1RQ_zpri     1010010 .. 00 0.... 001 ... ..... ..... \
                @rpri_load_msz nreg=0
 
+# SVE 32-bit gather prefetch (scalar plus 32-bit scaled offsets)
+PRF            1000010 00 -1 ----- 0-- --- ----- 0 ----
+
+# SVE 32-bit gather prefetch (vector plus immediate)
+PRF            1000010 -- 00 ----- 111 --- ----- 0 ----
+
+# SVE contiguous prefetch (scalar plus immediate)
+PRF            1000010 11 1- ----- 0-- --- ----- 0 ----
+
+# SVE contiguous prefetch (scalar plus scalar)
+PRF            1000010 -- 00 ----- 110 --- ----- 0 ----
+
+### SVE Memory 64-bit Gather Group
+
+# SVE 64-bit gather prefetch (scalar plus 64-bit scaled offsets)
+PRF            1100010 00 11 ----- 1-- --- ----- 0 ----
+
+# SVE 64-bit gather prefetch (scalar plus unpacked 32-bit scaled offsets)
+PRF            1100010 00 -1 ----- 0-- --- ----- 0 ----
+
+# SVE 64-bit gather prefetch (vector plus immediate)
+PRF            1100010 -- 00 ----- 111 --- ----- 0 ----
+
 ### SVE Memory Store Group
 
 # SVE store predicate register
-- 
2.14.3