[PATCH][ARM] add HFmode to arm_preferred_simd_mode

[Kugan]

Hi,

Is there any reason why HFmode is not there in arm_preferred_simd_mode?
NEON does support this.

Cross regression tested for arm-none-linux-gnueabi with qemu and no new
regressions.

Attached patch enables this. Is this OK for stage1.

Thanks,
Kugan

gcc/
+2014-02-14  Kugan Vivekanandarajah  <kug...@linaro.org>
+
+       * config/arm/arm.c (arm_preferred_simd_mode): Add HFmode to
+        preferred modes.



diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index b49f43e..bd90e85 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -28564,6 +28564,10 @@ arm_preferred_simd_mode (enum machine_mode mode)
   if (TARGET_NEON)
     switch (mode)
       {
+      case HFmode:
+       if (arm_fp16_format)
+         return TARGET_NEON_VECTORIZE_DOUBLE ? V4HFmode : V8HFmode;
+       break;
       case SFmode:
        return TARGET_NEON_VECTORIZE_DOUBLE ? V2SFmode : V4SFmode;
       case SImode: