[Qemu-devel] [PATCH v2 07/14] target/arm: Implement FCVT (scalar, fixed-point) for fp16

[Richard Henderson]

Cc: qemu-sta...@nongnu.org
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 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 d794744aec..e19d97e8f1 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -5460,8 +5460,7 @@ 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;
     }
@@ -5480,6 +5479,20 @@ static void disas_fp_fixed_conv(DisasContext *s, 
uint32_t insn)
         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;
+    }
+
     if (!fp_access_check(s)) {
         return;
     }
-- 
2.14.3