Re: [Qemu-devel] [5123] Fix y register loads and stores

[Vince Weaver <vince@csl.cornell.edu>]

> So something is wrong with the sign extension.  Unfortunately I won't have 
> time to look into this more until tomorrow, but I wanted to just get this out 
> there.

I did have time to look at it in the end.

Here's a patch that fixes my test case.  I'll have to look at the sparcv9 
manual closer to make sure it's the right thing to do.

Vince

--- ./target-sparc/translate.c.orig	2008-09-01 19:03:10.000000000 -0400
+++ ./target-sparc/translate.c	2008-09-01 19:02:54.000000000 -0400
@@ -793,8 +793,8 @@
      r_temp = tcg_temp_new(TCG_TYPE_I64);
      r_temp2 = tcg_temp_new(TCG_TYPE_I64);

-    tcg_gen_ext_tl_i64(r_temp, src2);
-    tcg_gen_ext_tl_i64(r_temp2, src1);
+    tcg_gen_ext_i32_i64(r_temp, src2);
+    tcg_gen_ext_i32_i64(r_temp2, src1);
      tcg_gen_mul_i64(r_temp2, r_temp, r_temp2);

      tcg_gen_shri_i64(r_temp, r_temp2, 32);