From 377ef731a85773788ae328e638698d27691bd77d Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Tue, 17 Oct 2017 12:35:21 -0700
Subject: [PATCH] target/arm: Use vector infrastructure for aa64 mov/not/neg
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-a64.c | 42 ++++++++++++++++++++++++++++++++++++------
 1 file changed, 36 insertions(+), 6 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 5a4e62ae0f..11310f1a7a 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -86,6 +86,7 @@ typedef void CryptoThreeOpIntFn(TCGv_ptr, TCGv_ptr, TCGv_i32);
 typedef void CryptoThreeOpFn(TCGv_ptr, TCGv_ptr, TCGv_ptr);
 
 /* Note that the gvec expanders operate on offsets + sizes.  */
+typedef void GVecGen2Fn(unsigned, uint32_t, uint32_t, uint32_t, uint32_t);
 typedef void GVecGen3Fn(unsigned, uint32_t, uint32_t,
                         uint32_t, uint32_t, uint32_t);
 
@@ -631,6 +632,14 @@ static TCGv_ptr get_fpstatus_ptr(void)
     return statusptr;
 }
 
+/* Expand a 2-operand AdvSIMD vector operation using an expander function.  */
+static void gen_gvec_fn2(DisasContext *s, bool is_q, int rd, int rn,
+                         GVecGen2Fn *gvec_fn, int vece)
+{
+    gvec_fn(vece, vec_full_reg_offset(s, rd), vec_full_reg_offset(s, rn),
+            is_q ? 16 : 8, vec_full_reg_size(s));
+}
+
 /* Expand a 3-operand AdvSIMD vector operation using an expander function.  */
 static void gen_gvec_fn3(DisasContext *s, bool is_q, int rd, int rn, int rm,
                          GVecGen3Fn *gvec_fn, int vece)
@@ -4596,14 +4605,17 @@ static void handle_fp_1src_double(DisasContext *s, int opcode, int rd, int rn)
     TCGv_i64 tcg_op;
     TCGv_i64 tcg_res;
 
+    switch (opcode) {
+    case 0x0: /* FMOV */
+        gen_gvec_fn2(s, false, rd, rn, tcg_gen_gvec_mov, 0);
+        return;
+    }
+
     fpst = get_fpstatus_ptr();
     tcg_op = read_fp_dreg(s, rn);
     tcg_res = tcg_temp_new_i64();
 
     switch (opcode) {
-    case 0x0: /* FMOV */
-        tcg_gen_mov_i64(tcg_res, tcg_op);
-        break;
     case 0x1: /* FABS */
         gen_helper_vfp_absd(tcg_res, tcg_op);
         break;
@@ -9185,7 +9197,11 @@ static void disas_simd_3same_logic(DisasContext *s, uint32_t insn)
         gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_andc, 0);
         return;
     case 2: /* ORR */
-        gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_or, 0);
+        if (rn == rm) { /* MOV */
+            gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_mov, 0);
+        } else {
+            gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_or, 0);
+        }
         return;
     case 3: /* ORN */
         gen_gvec_fn3(s, is_q, rd, rn, rm, tcg_gen_gvec_orc, 0);
@@ -10059,8 +10075,7 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         return;
     case 0x5: /* CNT, NOT, RBIT */
         if (u && size == 0) {
-            /* NOT: adjust size so we can use the 64-bits-at-a-time loop. */
-            size = 3;
+            /* NOT */
             break;
         } else if (u && size == 1) {
             /* RBIT */
@@ -10312,6 +10327,21 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
         tcg_rmode = NULL;
     }
 
+    switch (opcode) {
+    case 0x5:
+        if (u && size == 0) { /* NOT */
+            gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_not, 0);
+            return;
+        }
+        break;
+    case 0xb:
+        if (u) { /* NEG */
+            gen_gvec_fn2(s, is_q, rd, rn, tcg_gen_gvec_neg, size);
+            return;
+        }
+        break;
+    }
+
     if (size == 3) {
         /* All 64-bit element operations can be shared with scalar 2misc */
         int pass;
-- 
2.11.4.GIT