target/arm: Implement SME RDSVL, ADDSVL, ADDSPL

These SME instructions are nominally within the SVE decode space,
so we add them to sve.decode and translate-sve.c.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-18-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index 96e934c1ea..95016e49e9 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -1286,6 +1286,19 @@ static bool trans_ADDVL(DisasContext *s, arg_ADDVL *a)
     return true;
 }
 
+static bool trans_ADDSVL(DisasContext *s, arg_ADDSVL *a)
+{
+    if (!dc_isar_feature(aa64_sme, s)) {
+        return false;
+    }
+    if (sme_enabled_check(s)) {
+        TCGv_i64 rd = cpu_reg_sp(s, a->rd);
+        TCGv_i64 rn = cpu_reg_sp(s, a->rn);
+        tcg_gen_addi_i64(rd, rn, a->imm * streaming_vec_reg_size(s));
+    }
+    return true;
+}
+
 static bool trans_ADDPL(DisasContext *s, arg_ADDPL *a)
 {
     if (!dc_isar_feature(aa64_sve, s)) {
@@ -1299,6 +1312,19 @@ static bool trans_ADDPL(DisasContext *s, arg_ADDPL *a)
     return true;
 }
 
+static bool trans_ADDSPL(DisasContext *s, arg_ADDSPL *a)
+{
+    if (!dc_isar_feature(aa64_sme, s)) {
+        return false;
+    }
+    if (sme_enabled_check(s)) {
+        TCGv_i64 rd = cpu_reg_sp(s, a->rd);
+        TCGv_i64 rn = cpu_reg_sp(s, a->rn);
+        tcg_gen_addi_i64(rd, rn, a->imm * streaming_pred_reg_size(s));
+    }
+    return true;
+}
+
 static bool trans_RDVL(DisasContext *s, arg_RDVL *a)
 {
     if (!dc_isar_feature(aa64_sve, s)) {
@@ -1311,6 +1337,18 @@ static bool trans_RDVL(DisasContext *s, arg_RDVL *a)
     return true;
 }
 
+static bool trans_RDSVL(DisasContext *s, arg_RDSVL *a)
+{
+    if (!dc_isar_feature(aa64_sme, s)) {
+        return false;
+    }
+    if (sme_enabled_check(s)) {
+        TCGv_i64 reg = cpu_reg(s, a->rd);
+        tcg_gen_movi_i64(reg, a->imm * streaming_vec_reg_size(s));
+    }
+    return true;
+}
+
 /*
  *** SVE Compute Vector Address Group
  */