From f47aa77982509d14bcc84cd47ec38f588b6ac832 Mon Sep 17 00:00:00 2001
From: Angus Gratton <gus@projectgus.com>
Date: Tue, 15 Sep 2015 15:09:42 +1000
Subject: [PATCH] Moved DoubleLoadStorageHandler to end of functions, improve
fast path l8ui performance
This allows a conditional branch that previously required a full jump instruction not to require it.
---
core/exception_unaligned_load.S.inc | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/core/exception_unaligned_load.S.inc b/core/exception_unaligned_load.S.inc
index 5540f72..03c9830 100644
--- a/core/exception_unaligned_load.S.inc
+++ b/core/exception_unaligned_load.S.inc
@@ -94,15 +94,6 @@ InnerLoadStoreExceptionHandler:
rfe
- .literal_position
-/* "Fix" LoadStoreException exceptions that are l8/l16 from an Instruction region,
- DoubleException exception variant (ie load happened in a level1 exception handler). */
-DoubleExceptionLoadStoreHandler:
- addi sp, sp, -0x18
- s32i a2, sp, 0x08
- rsr.epc2 a2
- j InnerLoadStoreExceptionHandler
-
/* Check the load instruction a2 for an l16si/16ui instruction
First test for a signed vs unsigned load.
@@ -187,4 +178,13 @@ DoubleExceptionLoadStoreHandler:
wsr.excsave1 a4
j .Lafter_write_value
+ .literal_position
+/* "Fix" LoadStoreException exceptions that are l8/l16 from an Instruction region,
+ DoubleException exception variant (ie load happened in a level1 exception handler). */
+DoubleExceptionLoadStoreHandler:
+ addi sp, sp, -0x18
+ s32i a2, sp, 0x08
+ rsr.epc2 a2
+ j InnerLoadStoreExceptionHandler
+
/* End of InnerUserLoadStoreExceptionHandler */