target/arm: Implement SVE prefetches

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180627043328.11531-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 11541b1..c73c3fc 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -4303,3 +4303,24 @@ static bool trans_ST1_zprz(DisasContext *s, arg_ST1_zprz *a, uint32_t insn)
                cpu_reg_sp(s, a->rn), fn);
     return true;
 }
+
+/*
+ * Prefetches
+ */
+
+static bool trans_PRF(DisasContext *s, arg_PRF *a, uint32_t insn)
+{
+    /* Prefetch is a nop within QEMU.  */
+    sve_access_check(s);
+    return true;
+}
+
+static bool trans_PRF_rr(DisasContext *s, arg_PRF_rr *a, uint32_t insn)
+{
+    if (a->rm == 31) {
+        return false;
+    }
+    /* Prefetch is a nop within QEMU.  */
+    sve_access_check(s);
+    return true;
+}