[Qemu-devel] [PATCH 5/9] target/arm: Implement FMOV (general) for fp16

[Richard Henderson <richard.henderson@linaro.org>]

Adding the fp16 moves to/from general registers.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate-a64.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index f2241d8174..36bb5f6f08 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -5375,6 +5375,15 @@ static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof)
             tcg_gen_st_i64(tcg_rn, cpu_env, fp_reg_hi_offset(s, rd));
             clear_vec_high(s, true, rd);
             break;
+        case 3:
+            /* 16 bit */
+            tmp = tcg_temp_new_i64();
+            tcg_gen_ext16u_i64(tmp, tcg_rn);
+            write_fp_dreg(s, rd, tmp);
+            tcg_temp_free_i64(tmp);
+            break;
+        default:
+            g_assert_not_reached();
         }
     } else {
         TCGv_i64 tcg_rd = cpu_reg(s, rd);
@@ -5392,6 +5401,12 @@ static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof)
             /* 64 bits from top half */
             tcg_gen_ld_i64(tcg_rd, cpu_env, fp_reg_hi_offset(s, rn));
             break;
+        case 3:
+            /* 16 bit */
+            tcg_gen_ld16u_i64(tcg_rd, cpu_env, fp_reg_offset(s, rn, MO_16));
+            break;
+        default:
+            g_assert_not_reached();
         }
     }
 }
@@ -5431,10 +5446,15 @@ static void disas_fp_int_conv(DisasContext *s, uint32_t insn)
         case 0xa: /* 64 bit */
         case 0xd: /* 64 bit to top half of quad */
             break;
+        case 0x6: /* 16-bit */
+            if (arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
+                break;
+            }
+            /* fallthru */
         default:
             /* all other sf/type/rmode combinations are invalid */
             unallocated_encoding(s);
-            break;
+            return;
         }
 
         if (!fp_access_check(s)) {
-- 
2.14.3