From: Richard Stallman <rms@gnu.org>
Date: Wed, 20 Oct 1993 22:22:43 +0000 (+0000)
Subject: (INITIALIZE_TRAMPOLINE): Emit 3 flush instrutions.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=297c72b635e085bea63af0a9f7e9a7b958a41da0;p=gcc.git

(INITIALIZE_TRAMPOLINE): Emit 3 flush instrutions.

From-SVN: r5840
---

diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h
index a60f80b5639..e988bbf41cb 100644
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -1015,7 +1015,10 @@ extern union tree_node *current_function_decl;
    This takes 16 insns: 2 shifts & 2 ands (to split up addresses), 4 sethi
    (to load in opcodes), 4 iors (to merge address and opcodes), and 4 writes
    (to store insns).  This is a bit excessive.  Perhaps a different
-   mechanism would be better here.  */
+   mechanism would be better here.
+
+   Emit 3 FLUSH instructions (UNSPEC_VOLATILE 2) to synchonize the data
+   and instruction caches.  */
 
 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)			\
 {									\
@@ -1046,6 +1049,15 @@ extern union tree_node *current_function_decl;
   emit_move_insn (tem, g1_ori);						\
   emit_insn (gen_iorsi3 (low_cxt, low_cxt, tem));			\
   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 16)), low_cxt);\
+  emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode,			\
+		      gen_rtvec (1, plus_constant (TRAMP, 0)),		\
+		      2));						\
+  emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode,			\
+		      gen_rtvec (1, plus_constant (TRAMP, 8)),		\
+		      2));						\
+  emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode,			\
+		      gen_rtvec (1, plus_constant (TRAMP, 16)),		\
+		      2));						\
 }
 
 /* Generate necessary RTL for __builtin_saveregs().