[Qemu-devel] [PATCH v2 30/42] target/arm: Convert VNEG to decodetree

[Peter Maydell <peter.maydell@linaro.org>]

Convert the VNEG instruction to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-vfp.inc.c | 10 ++++++++++
 target/arm/translate.c         |  6 +-----
 target/arm/vfp.decode          |  5 +++++
 3 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
index d0282f1f921..6e06b2a130a 100644
--- a/target/arm/translate-vfp.inc.c
+++ b/target/arm/translate-vfp.inc.c
@@ -1898,3 +1898,13 @@ static bool trans_VABS_dp(DisasContext *s, arg_VABS_dp *a)
 {
     return do_vfp_2op_dp(s, gen_helper_vfp_absd, a->vd, a->vm);
 }
+
+static bool trans_VNEG_sp(DisasContext *s, arg_VNEG_sp *a)
+{
+    return do_vfp_2op_sp(s, gen_helper_vfp_negs, a->vd, a->vm);
+}
+
+static bool trans_VNEG_dp(DisasContext *s, arg_VNEG_dp *a)
+{
+    return do_vfp_2op_dp(s, gen_helper_vfp_negd, a->vd, a->vm);
+}
diff --git a/target/arm/translate.c b/target/arm/translate.c
index dc9076a60a3..b0eecb6ca8f 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -3098,7 +3098,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
                 return 1;
             case 15:
                 switch (rn) {
-                case 1:
+                case 1 ... 2:
                     /* Already handled by decodetree */
                     return 1;
                 default:
@@ -3112,7 +3112,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
                 /* rn is opcode, encoded as per VFP_SREG_N. */
                 switch (rn) {
                 case 0x00: /* vmov */
-                case 0x02: /* vneg */
                 case 0x03: /* vsqrt */
                     break;
 
@@ -3291,9 +3290,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
                     case 0: /* cpy */
                         /* no-op */
                         break;
-                    case 2: /* neg */
-                        gen_vfp_neg(dp);
-                        break;
                     case 3: /* sqrt */
                         gen_vfp_sqrt(dp);
                         break;
diff --git a/target/arm/vfp.decode b/target/arm/vfp.decode
index 7035861c270..79e41963be4 100644
--- a/target/arm/vfp.decode
+++ b/target/arm/vfp.decode
@@ -161,3 +161,8 @@ VABS_sp      ---- 1110 1.11 0000 .... 1010 11.0 .... \
              vd=%vd_sp vm=%vm_sp
 VABS_dp      ---- 1110 1.11 0000 .... 1011 11.0 .... \
              vd=%vd_dp vm=%vm_dp
+
+VNEG_sp      ---- 1110 1.11 0001 .... 1010 01.0 .... \
+             vd=%vd_sp vm=%vm_sp
+VNEG_dp      ---- 1110 1.11 0001 .... 1011 01.0 .... \
+             vd=%vd_dp vm=%vm_dp
-- 
2.20.1