target/arm: Convert FJCVTZS to decodetree

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241211163036.2297116-34-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode
index 5e170cec7a86b0593ef19e9cb13207a935a8c925..cd109616184e22b6a03301bf7a07769d9874674b 100644 (file)
--- a/target/arm/tcg/a64.decode
+++ b/target/arm/tcg/a64.decode
@@ -1363,6 +1363,8 @@ FCVTZU_g        . 0011110 .. 111001 000000 ..... .....  @icvt
 FCVTAS_g        . 0011110 .. 100100 000000 ..... .....  @icvt
 FCVTAU_g        . 0011110 .. 100101 000000 ..... .....  @icvt
 
+FJCVTZS         0 0011110 01 111110 000000 ..... .....  @rr
+
 # Floating-point data processing (1 source)
 
 FMOV_s          00011110 .. 1 000000 10000 ..... .....      @rr_hsd

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 67227e26767dc0e8002c5f64a61975fe71e4b71e..d260b45ddb2ac7c89023a5d2e305724c25bafd54 100644 (file)
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -8714,6 +8714,26 @@ TRANS(FCVTZU_g, do_fcvt_g, a, FPROUNDING_ZERO, false)
 TRANS(FCVTAS_g, do_fcvt_g, a, FPROUNDING_TIEAWAY, true)
 TRANS(FCVTAU_g, do_fcvt_g, a, FPROUNDING_TIEAWAY, false)
 
+static bool trans_FJCVTZS(DisasContext *s, arg_FJCVTZS *a)
+{
+    if (!dc_isar_feature(aa64_jscvt, s)) {
+        return false;
+    }
+    if (fp_access_check(s)) {
+        TCGv_i64 t = read_fp_dreg(s, a->rn);
+        TCGv_ptr fpstatus = fpstatus_ptr(FPST_FPCR);
+
+        gen_helper_fjcvtzs(t, t, fpstatus);
+
+        tcg_gen_ext32u_i64(cpu_reg(s, a->rd), t);
+        tcg_gen_extrh_i64_i32(cpu_ZF, t);
+        tcg_gen_movi_i32(cpu_CF, 0);
+        tcg_gen_movi_i32(cpu_NF, 0);
+        tcg_gen_movi_i32(cpu_VF, 0);
+    }
+    return true;
+}
+
 static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof)
 {
     /* FMOV: gpr to or from float, double, or top half of quad fp reg,
@@ -8775,20 +8795,6 @@ static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof)
     }
 }
 
-static void handle_fjcvtzs(DisasContext *s, int rd, int rn)
-{
-    TCGv_i64 t = read_fp_dreg(s, rn);
-    TCGv_ptr fpstatus = fpstatus_ptr(FPST_FPCR);
-
-    gen_helper_fjcvtzs(t, t, fpstatus);
-
-    tcg_gen_ext32u_i64(cpu_reg(s, rd), t);
-    tcg_gen_extrh_i64_i32(cpu_ZF, t);
-    tcg_gen_movi_i32(cpu_CF, 0);
-    tcg_gen_movi_i32(cpu_NF, 0);
-    tcg_gen_movi_i32(cpu_VF, 0);
-}
-
 /* Floating point <-> integer conversions
  *   31   30  29 28       24 23  22  21 20   19 18 16 15         10 9  5 4  0
  * +----+---+---+-----------+------+---+-------+-----+-------------+----+----+
@@ -8843,13 +8849,6 @@ static void disas_fp_int_conv(DisasContext *s, uint32_t insn)
             break;
 
         case 0b00111110: /* FJCVTZS */
-            if (!dc_isar_feature(aa64_jscvt, s)) {
-                goto do_unallocated;
-            } else if (fp_access_check(s)) {
-                handle_fjcvtzs(s, rd, rn);
-            }
-            break;
-
         default:
         do_unallocated:
             unallocated_encoding(s);