From 592f35ac0ff8d525fad2dc606b53b4cd8b84fd69 Mon Sep 17 00:00:00 2001
From: Ali Saidi <saidi@eecs.umich.edu>
Date: Fri, 2 Feb 2007 18:04:42 -0500
Subject: fix mostly floating point related

src/arch/sparc/floatregfile.cc:
    fix fp read/writing to registers... looking for suggestions on cleaner ways if anyone has them
src/arch/sparc/isa/decoder.isa:
    fix some fp implementations
src/arch/sparc/isa/formats/basic.isa:
    add new fp op class that 0 cexec in fsr and sets rounding mode for the up comming op
src/arch/sparc/isa/includes.isa:
    include the appropriate header files for the rounding code
src/arch/sparc/miscregfile.cc:
    print fsr out when it's read/written and the Sparc traceflgas in on
src/cpu/exetrace.cc:
    fix printing of float registers

--HG--
extra : convert_revision : 49faab27f2e786a8455f9ca0f3f0132380c9d992
---
 src/arch/sparc/isa/formats/basic.isa | 39 ++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'src/arch/sparc/isa/formats/basic.isa')

diff --git a/src/arch/sparc/isa/formats/basic.isa b/src/arch/sparc/isa/formats/basic.isa
index e8762a205..fac523aeb 100644
--- a/src/arch/sparc/isa/formats/basic.isa
+++ b/src/arch/sparc/isa/formats/basic.isa
@@ -103,3 +103,42 @@ def format BasicOperate(code, *flags) {{
         decode_block = BasicDecode.subst(iop)
         exec_output = BasicExecute.subst(iop)
 }};
+
+def format FpBasic(code, *flags) {{
+        fp_code = """
+    Fsr = insertBits(Fsr,4,0,0);
+#if defined(__sun) || defined (__OpenBSD__)
+    fp_rnd newrnd = FP_RN;
+    switch (Fsr<31:30>) {
+      case 0: newrnd = FP_RN; break;
+      case 1: newrnd = FP_RZ; break;
+      case 2: newrnd = FP_RP; break;
+      case 3: newrnd = FP_RM; break;
+    }
+    fp_rnd oldrnd = fpsetround(newrnd);
+#else
+    int newrnd = FE_TONEAREST;
+    switch (Fsr<31:30>) {
+      case 0: newrnd = FE_TONEAREST; break;
+      case 1: newrnd = FE_TOWARDZERO; break;
+      case 2: newrnd = FE_UPWARD; break;
+      case 3: newrnd = FE_DOWNWARD; break;
+    }
+    int oldrnd = fegetround();
+    fesetround(newrnd);
+#endif
+"""
+        fp_code += code
+        fp_code += """
+#if defined(__sun) || defined (__OpenBSD__)
+    fpsetround(oldrnd);
+#else
+    fesetround(oldrnd);
+#endif
+"""
+        iop = InstObjParams(name, Name, 'SparcStaticInst', fp_code, flags)
+        header_output = BasicDeclare.subst(iop)
+        decoder_output = BasicConstructor.subst(iop)
+        decode_block = BasicDecode.subst(iop)
+        exec_output = BasicExecute.subst(iop)
+}};
-- 
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