From 7a4d66554399710b474a4497cbbe4bc5846f4f04 Mon Sep 17 00:00:00 2001
From: "Ben.Lippmeier@anu.edu.au" <unknown>
Date: Wed, 21 Jan 2009 05:23:34 +0000
Subject: [PATCH] SPARC NCG: Add a SPARC version of rts_mkInt64 that handles
 misaligned closure payloads.

---
 rts/RtsAPI.c |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/rts/RtsAPI.c b/rts/RtsAPI.c
index d0bdead..9fa0e01 100644
--- a/rts/RtsAPI.c
+++ b/rts/RtsAPI.c
@@ -74,6 +74,31 @@ rts_mkInt32 (Capability *cap, HsInt32 i)
   return p;
 }
 
+
+#ifdef sparc_HOST_ARCH
+/* The closures returned by allocateLocal are only guaranteed to be 32 bit
+   aligned, because that's the size of pointers. SPARC v9 can't do
+   misaligned loads/stores, so we have to write the 64bit word in chunks         */
+
+HaskellObj
+rts_mkInt64 (Capability *cap, HsInt64 i_)
+{
+  StgInt64 i   = (StgInt64)i_;
+  StgInt32 *tmp;
+
+  StgClosure *p = (StgClosure *)allocateLocal(cap,CONSTR_sizeW(0,2));
+  SET_HDR(p, I64zh_con_info, CCS_SYSTEM);
+
+  tmp    = (StgInt32*)&(p->payload[0]);
+
+  tmp[0] = (StgInt32)((StgInt64)i >> 32);
+  tmp[1] = (StgInt32)i;		/* truncate high 32 bits */
+
+  return p;
+}
+
+#else
+
 HaskellObj
 rts_mkInt64 (Capability *cap, HsInt64 i)
 {
@@ -85,6 +110,9 @@ rts_mkInt64 (Capability *cap, HsInt64 i)
   return p;
 }
 
+#endif /* sparc_HOST_ARCH */
+
+
 HaskellObj
 rts_mkWord (Capability *cap, HsWord i)
 {
-- 
1.7.10.4