[Qemu-devel] [PATCH 78/99] target/arm: Implement FCVT (scalar, fixed-point) for fp16

[Michael Roth]

From: Richard Henderson <address@hidden>

Cc: address@hidden
Reviewed-by: Alex Bennée <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
Tested-by: Alex Bennée <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
(cherry picked from commit 2752728016bef06e7c9cfb961019272859beeca4)
Signed-off-by: Michael Roth <address@hidden>
---
 target/arm/translate-a64.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 33be611bdb..c5be901b5f 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -5454,8 +5454,21 @@ static void disas_fp_fixed_conv(DisasContext *s, 
uint32_t insn)
     bool sf = extract32(insn, 31, 1);
     bool itof;
 
-    if (sbit || (type > 1)
-        || (!sf && scale < 32)) {
+    if (sbit || (!sf && scale < 32)) {
+        unallocated_encoding(s);
+        return;
+    }
+
+    switch (type) {
+    case 0: /* float32 */
+    case 1: /* float64 */
+        break;
+    case 3: /* float16 */
+        if (arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+            break;
+        }
+        /* fallthru */
+    default:
         unallocated_encoding(s);
         return;
     }
-- 
2.17.1