Patchwork [v3,5/6] target-arm: Silence NaNs resulting from half-precision conversions

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Submitter Peter Maydell
Date Feb. 10, 2011, 11:29 a.m.
Message ID <1297337341-10815-6-git-send-email-peter.maydell@linaro.org>
Download mbox | patch
Permalink /patch/82601/
State New
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Comments

Peter Maydell - Feb. 10, 2011, 11:29 a.m.
Silence the NaNs that may result from half-precision conversion,
as we do for the other conversions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target-arm/helper.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

Patch

diff --git a/target-arm/helper.c b/target-arm/helper.c
index d29c42b..e427747 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -2627,14 +2627,22 @@  float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUState *env)
 {
     float_status *s = &env->vfp.fp_status;
     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
-    return float16_to_float32(make_float16(a), ieee, s);
+    float32 r = float16_to_float32(make_float16(a), ieee, s);
+    if (ieee) {
+        return float32_maybe_silence_nan(r);
+    }
+    return r;
 }
 
 uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUState *env)
 {
     float_status *s = &env->vfp.fp_status;
     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
-    return float16_val(float32_to_float16(a, ieee, s));
+    float16 r = float32_to_float16(a, ieee, s);
+    if (ieee) {
+        r = float16_maybe_silence_nan(r);
+    }
+    return float16_val(r);
 }
 
 float32 HELPER(recps_f32)(float32 a, float32 b, CPUState *env)