From 99c494bae943aaa41c65d00fdf8edbf498159575 Mon Sep 17 00:00:00 2001
From: Lioncash <mathew1800@gmail.com>
Date: Fri, 8 Mar 2019 06:24:03 -0500
Subject: [PATCH] common/fp/unpacked: Add FPRoundCV

Corresponds to the equivalent pseudocode within the ARMv8 reference
manual. This will be necessary for supporting half-precision
floating-point.

This also makes use of it within FPConvert
---
 src/common/fp/op/FPConvert.cpp | 2 +-
 src/common/fp/unpacked.h       | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/common/fp/op/FPConvert.cpp b/src/common/fp/op/FPConvert.cpp
index 49524906..87f965a7 100644
--- a/src/common/fp/op/FPConvert.cpp
+++ b/src/common/fp/op/FPConvert.cpp
@@ -93,7 +93,7 @@ FPT_TO FPConvert(FPT_FROM op, FPCR fpcr, RoundingMode rounding_mode, FPSR& fpsr)
         return FPInfo<FPT_TO>::Zero(sign);
     }
 
-    return FPRoundBase<FPT_TO>(value, fpcr, rounding_mode, fpsr);
+    return FPRoundCV<FPT_TO>(value, fpcr, rounding_mode, fpsr);
 }
 
 template u64 FPConvert<u64, u32>(u32 op, FPCR fpcr, RoundingMode rounding_mode, FPSR& fpsr);
diff --git a/src/common/fp/unpacked.h b/src/common/fp/unpacked.h
index 943ee461..ae206c19 100644
--- a/src/common/fp/unpacked.h
+++ b/src/common/fp/unpacked.h
@@ -69,6 +69,12 @@ FPT FPRound(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
     return FPRoundBase<FPT>(op, fpcr, rounding, fpsr);
 }
 
+template<typename FPT>
+FPT FPRoundCV(FPUnpacked op, FPCR fpcr, RoundingMode rounding, FPSR& fpsr) {
+    fpcr.FZ16(false);
+    return FPRoundBase<FPT>(op, fpcr, rounding, fpsr);
+}
+
 template<typename FPT>
 FPT FPRound(FPUnpacked op, FPCR fpcr, FPSR& fpsr) {
     return FPRound<FPT>(op, fpcr, fpcr.RMode(), fpsr);