[Qemu-devel] [PATCH v2 26/42] target/arm: Convert VDIV to decodetree

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

Convert the VDIV 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         | 21 +--------------------
 target/arm/vfp.decode          |  5 +++++
 3 files changed, 16 insertions(+), 20 deletions(-)

diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
index 12da3b8acb8..6af99605d5c 100644
--- a/target/arm/translate-vfp.inc.c
+++ b/target/arm/translate-vfp.inc.c
@@ -1471,3 +1471,13 @@ static bool trans_VSUB_dp(DisasContext *s, arg_VSUB_sp *a)
 {
     return do_vfp_3op_dp(s, gen_helper_vfp_subd, a->vd, a->vn, a->vm, false);
 }
+
+static bool trans_VDIV_sp(DisasContext *s, arg_VDIV_sp *a)
+{
+    return do_vfp_3op_sp(s, gen_helper_vfp_divs, a->vd, a->vn, a->vm, false);
+}
+
+static bool trans_VDIV_dp(DisasContext *s, arg_VDIV_sp *a)
+{
+    return do_vfp_3op_dp(s, gen_helper_vfp_divd, a->vd, a->vn, a->vm, false);
+}
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 18d4f9933ad..a9ec6eaef80 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1374,22 +1374,6 @@ static TCGv_ptr get_fpstatus_ptr(int neon)
     return statusptr;
 }
 
-#define VFP_OP2(name)                                                 \
-static inline void gen_vfp_##name(int dp)                             \
-{                                                                     \
-    TCGv_ptr fpst = get_fpstatus_ptr(0);                              \
-    if (dp) {                                                         \
-        gen_helper_vfp_##name##d(cpu_F0d, cpu_F0d, cpu_F1d, fpst);    \
-    } else {                                                          \
-        gen_helper_vfp_##name##s(cpu_F0s, cpu_F0s, cpu_F1s, fpst);    \
-    }                                                                 \
-    tcg_temp_free_ptr(fpst);                                          \
-}
-
-VFP_OP2(div)
-
-#undef VFP_OP2
-
 static inline void gen_vfp_abs(int dp)
 {
     if (dp)
@@ -3109,7 +3093,7 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
             rn = VFP_SREG_N(insn);
 
             switch (op) {
-            case 0 ... 7:
+            case 0 ... 8:
                 /* Already handled by decodetree */
                 return 1;
             default:
@@ -3295,9 +3279,6 @@ static int disas_vfp_insn(DisasContext *s, uint32_t insn)
             for (;;) {
                 /* Perform the calculation.  */
                 switch (op) {
-                case 8: /* div: fn / fm */
-                    gen_vfp_div(dp);
-                    break;
                 case 10: /* VFNMA : fd = muladd(-fd,  fn, fm) */
                 case 11: /* VFNMS : fd = muladd(-fd, -fn, fm) */
                 case 12: /* VFMA  : fd = muladd( fd,  fn, fm) */
diff --git a/target/arm/vfp.decode b/target/arm/vfp.decode
index de56f44efc9..de305f60e18 100644
--- a/target/arm/vfp.decode
+++ b/target/arm/vfp.decode
@@ -137,3 +137,8 @@ VSUB_sp      ---- 1110 0.11 .... .... 1010 .1.0 .... \
              vm=%vm_sp vn=%vn_sp vd=%vd_sp
 VSUB_dp      ---- 1110 0.11 .... .... 1011 .1.0 .... \
              vm=%vm_dp vn=%vn_dp vd=%vd_dp
+
+VDIV_sp      ---- 1110 1.00 .... .... 1010 .0.0 .... \
+             vm=%vm_sp vn=%vn_sp vd=%vd_sp
+VDIV_dp      ---- 1110 1.00 .... .... 1011 .0.0 .... \
+             vm=%vm_dp vn=%vn_dp vd=%vd_dp
-- 
2.20.1