[Qemu-devel] [PATCH v3 25/31] arm/translate-a64: add FP16 FSQRT to simd_two_reg_misc_fp16

["Alex Bennée" <alex.bennee@linaro.org>]

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
v2
  remove superfluous helpers
---
 target/arm/helper-a64.c    | 13 +++++++++++++
 target/arm/helper-a64.h    |  1 +
 target/arm/translate-a64.c |  5 +++++
 3 files changed, 19 insertions(+)

diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index 92a0d55a9c..afb25ad20c 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -828,3 +828,16 @@ uint32_t HELPER(advsimd_f16touinth)(float16 a, void *fpstp)
     }
     return float16_to_uint16(a, fpst);
 }
+
+/*
+ * Square Root and Reciprocal square root
+ */
+
+float16 HELPER(sqrt_f16)(float16 a, void *fpstp)
+{
+    float_status *s = fpstp;
+
+    return float16_sqrt(a, s);
+}
+
+
diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 339323fc3d..ef4ddfe9d8 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -80,3 +80,4 @@ DEF_HELPER_2(advsimd_rinth_exact, f16, f16, ptr)
 DEF_HELPER_2(advsimd_rinth, f16, f16, ptr)
 DEF_HELPER_2(advsimd_f16tosinth, i32, f16, ptr)
 DEF_HELPER_2(advsimd_f16touinth, i32, f16, ptr)
+DEF_HELPER_2(sqrt_f16, f16, f16, ptr)
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index a7e99e2a2f..ba3926262e 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -11388,6 +11388,8 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
     case 0x6f: /* FNEG */
         need_fpst = false;
         break;
+    case 0x7f: /* FSQRT (vector) */
+        break;
     default:
         fprintf(stderr, "%s: insn %#04x fpop %#2x\n", __func__, insn, fpop);
         g_assert_not_reached();
@@ -11502,6 +11504,9 @@ static void disas_simd_two_reg_misc_fp16(DisasContext *s, uint32_t insn)
             case 0x6f: /* FNEG */
                 tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
                 break;
+            case 0x7f: /* FSQRT */
+                gen_helper_sqrt_f16(tcg_res, tcg_op, tcg_fpstatus);
+                break;
             default:
                 g_assert_not_reached();
             }
-- 
2.15.1