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[Qemu-devel] [PATCH 2/3] tcg-hppa: Fix 64-bit argument ordering.
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 2/3] tcg-hppa: Fix 64-bit argument ordering. |
Date: |
Sat, 20 Feb 2010 11:32:23 -0800 |
---
tcg/tcg.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/tcg/tcg.c b/tcg/tcg.c
index e6a1caf..32345cc 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -596,7 +596,17 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned
int flags,
real_args++;
}
#endif
-#ifdef TCG_TARGET_WORDS_BIGENDIAN
+ /* If stack grows up, then we will be placing successive
+ arguments at lower addresses, which means we need to
+ reverse the order compared to how we would normally
+ treat either big or little-endian. For those arguments
+ that will wind up in registers, this still works for
+ HPPA (the only current STACK_GROWSUP target) since the
+ argument registers are *also* allocated in decreasing
+ order. If another such target is added, this logic may
+ have to get more complicated to differentiate between
+ stack arguments and register arguments. */
+#if defined(TCG_TARGET_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP)
*gen_opparam_ptr++ = args[i] + 1;
*gen_opparam_ptr++ = args[i];
#else
--
1.6.6