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[patch, simulator, mips] Add rdhwr instruction to mips simulator
- From: "Steve Ellcey " <sellcey at mips dot com>
- To: <gdb-patches at sourceware dot org>
- Cc: <fu at mips dot com>
- Date: Wed, 3 Oct 2012 12:34:18 -0700
- Subject: [patch, simulator, mips] Add rdhwr instruction to mips simulator
While testing GCC with the mips-mti-elf target and using the GNU simulator
I noticed that some tests (like gcc.dg/builtins-64.c) were failing on mips32r2
with synci enabled. This is because the rdhwr instruction was not implemented
in the simulator.
This patch (created by Chao-ying and tested by me) adds the rdhwr instruction
to the mips simulator and fixes the gcc.dg/builtins-64.c failure.
OK to checkin?
Steve Ellcey
sellcey@mips.com
2012-10-04 Chao-ying Fu <fu@mips.com>
Steve Ellcey <sellcey@mips.com>
* mips/mips3264r2.igen (rdhwr): New.
diff --git a/sim/mips/mips3264r2.igen b/sim/mips/mips3264r2.igen
index c52ec3b..e0b6d5b 100644
--- a/sim/mips/mips3264r2.igen
+++ b/sim/mips/mips3264r2.igen
@@ -241,6 +241,17 @@
}
+011111,00000,5.RT,5.RD,00000,111011::32::RDHWR
+"rdhwr r<RT>, r<RD>"
+*mips32r2:
+*mips64r2:
+{
+ // Return 0 for all hardware registers currently
+ GPR[RT] = EXTEND32 (0);
+ TRACE_ALU_RESULT1 (GPR[RT]);
+}
+
+
011111,00000,5.RT,5.RD,00010,100000::32::WSBH
"wsbh r<RD>, r<RT>"
*mips32r2: