target/arm: Convert VFP VMLS to decodetree

Convert the VFP VMLS instruction to decodetree.

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

1 files changed, 38 insertions, 0 deletions

diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
index 4f922dc840..00f64401dd 100644
--- a/target/arm/translate-vfp.inc.c
+++ b/target/arm/translate-vfp.inc.c
@@ -1303,3 +1303,41 @@ static bool trans_VMLA_dp(DisasContext *s, arg_VMLA_sp *a)
 {
     return do_vfp_3op_dp(s, gen_VMLA_dp, a->vd, a->vn, a->vm, true);
 }
+
+static void gen_VMLS_sp(TCGv_i32 vd, TCGv_i32 vn, TCGv_i32 vm, TCGv_ptr fpst)
+{
+    /*
+     * VMLS: vd = vd + -(vn * vm)
+     * Note that order of inputs to the add matters for NaNs.
+     */
+    TCGv_i32 tmp = tcg_temp_new_i32();
+
+    gen_helper_vfp_muls(tmp, vn, vm, fpst);
+    gen_helper_vfp_negs(tmp, tmp);
+    gen_helper_vfp_adds(vd, vd, tmp, fpst);
+    tcg_temp_free_i32(tmp);
+}
+
+static bool trans_VMLS_sp(DisasContext *s, arg_VMLS_sp *a)
+{
+    return do_vfp_3op_sp(s, gen_VMLS_sp, a->vd, a->vn, a->vm, true);
+}
+
+static void gen_VMLS_dp(TCGv_i64 vd, TCGv_i64 vn, TCGv_i64 vm, TCGv_ptr fpst)
+{
+    /*
+     * VMLS: vd = vd + -(vn * vm)
+     * Note that order of inputs to the add matters for NaNs.
+     */
+    TCGv_i64 tmp = tcg_temp_new_i64();
+
+    gen_helper_vfp_muld(tmp, vn, vm, fpst);
+    gen_helper_vfp_negd(tmp, tmp);
+    gen_helper_vfp_addd(vd, vd, tmp, fpst);
+    tcg_temp_free_i64(tmp);
+}
+
+static bool trans_VMLS_dp(DisasContext *s, arg_VMLS_sp *a)
+{
+    return do_vfp_3op_dp(s, gen_VMLS_dp, a->vd, a->vn, a->vm, true);
+}