From ca7b945c7330064f494436611bd35fce6107abf6 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Thu, 3 Jul 2014 08:52:45 -0700
Subject: alpha: Fix lround implementations

Use chopped rounding to add 0.5.
---
 sysdeps/alpha/fpu/s_lround.c  | 8 ++++----
 sysdeps/alpha/fpu/s_lroundf.c | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'sysdeps')

diff --git a/sysdeps/alpha/fpu/s_lround.c b/sysdeps/alpha/fpu/s_lround.c
index dedb98e31a..52a88b6b56 100644
--- a/sysdeps/alpha/fpu/s_lround.c
+++ b/sysdeps/alpha/fpu/s_lround.c
@@ -25,11 +25,11 @@
 long int
 __lround (double x)
 {
-  double adj;
+  double adj, y;
 
-  adj = 0x1.fffffffffffffp-2;	/* nextafter (0.5, 0.0) */
-  adj = copysign (adj, x);
-  return x + adj;
+  adj = copysign (0.5, x);
+  asm("addt/suc %1,%2,%0" : "=&f"(y) : "f"(x), "f"(adj));
+  return y;
 }
 
 strong_alias (__lround, __llround)
diff --git a/sysdeps/alpha/fpu/s_lroundf.c b/sysdeps/alpha/fpu/s_lroundf.c
index 650004dbc1..ebbb1295a4 100644
--- a/sysdeps/alpha/fpu/s_lroundf.c
+++ b/sysdeps/alpha/fpu/s_lroundf.c
@@ -25,11 +25,11 @@
 long int
 __lroundf (float x)
 {
-  float adj;
+  float adj, y;
 
-  adj = 0x1.fffffep-2;		/* nextafterf (0.5f, 0.0f) */
-  adj = copysignf (adj, x);
-  return x + adj;
+  adj = copysignf (0.5f, x);
+  asm("adds/suc %1,%2,%0" : "=&f"(y) : "f"(x), "f"(adj));
+  return y;
 }
 
 strong_alias (__lroundf, __llroundf)
-- 
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