From: Michael Nolan <mtnolan2640@gmail.com>
Date: Thu, 21 May 2020 18:49:25 +0000 (-0400)
Subject: Add third cr register select field to decoder
X-Git-Tag: div_pipeline~975
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c2894be6f028aa621782afbad0fbbd8271e5a6f6;p=soc.git

Add third cr register select field to decoder
---

diff --git a/src/soc/decoder/power_decoder2.py b/src/soc/decoder/power_decoder2.py
index 16f47b40..dbd87f96 100644
--- a/src/soc/decoder/power_decoder2.py
+++ b/src/soc/decoder/power_decoder2.py
@@ -280,6 +280,7 @@ class DecodeCRIn(Elaboratable):
         self.insn_in = Signal(32, reset_less=True)
         self.cr_bitfield = Data(3, "cr_bitfield")
         self.cr_bitfield_b = Data(3, "cr_bitfield_b")
+        self.cr_bitfield_o = Data(3, "cr_bitfield_o")
         self.whole_reg = Signal(reset_less=True)
 
     def elaborate(self, platform):
@@ -296,16 +297,18 @@ class DecodeCRIn(Elaboratable):
                 comb += self.cr_bitfield.data.eq(0)
                 comb += self.cr_bitfield.ok.eq(1)
             with m.Case(CRInSel.BI):
-                comb += self.cr_bitfield.data.eq(self.dec.BI[3:5])
+                comb += self.cr_bitfield.data.eq(self.dec.BI[2:5])
                 comb += self.cr_bitfield.ok.eq(1)
             with m.Case(CRInSel.BFA):
                 comb += self.cr_bitfield.data.eq(self.dec.FormX.BFA[0:-1])
                 comb += self.cr_bitfield.ok.eq(1)
             with m.Case(CRInSel.BA_BB):
-                comb += self.cr_bitfield.data.eq(self.dec.BA[3:5])
+                comb += self.cr_bitfield.data.eq(self.dec.BA[2:5])
                 comb += self.cr_bitfield.ok.eq(1)
-                comb += self.cr_bitfield_b.data.eq(self.dec.BB[3:5])
+                comb += self.cr_bitfield_b.data.eq(self.dec.BB[2:5])
                 comb += self.cr_bitfield_b.ok.eq(1)
+                comb += self.cr_bitfield_o.data.eq(self.dec.BT[2:5])
+                comb += self.cr_bitfield_o.ok.eq(1)
             with m.Case(CRInSel.BC):
                 comb += self.cr_bitfield.data.eq(self.dec.BC[0:-1])
                 comb += self.cr_bitfield.ok.eq(1)
@@ -345,7 +348,7 @@ class DecodeCROut(Elaboratable):
                 comb += self.cr_bitfield.data.eq(self.dec.FormX.BF[0:-1])
                 comb += self.cr_bitfield.ok.eq(1)
             with m.Case(CROutSel.BT):
-                comb += self.cr_bitfield.data.eq(self.dec.FormXL.BT[3:5])
+                comb += self.cr_bitfield.data.eq(self.dec.FormXL.BT[2:5])
                 comb += self.cr_bitfield.ok.eq(1)
             with m.Case(CROutSel.WHOLE_REG):
                 comb += self.whole_reg.eq(1)
@@ -384,6 +387,7 @@ class Decode2ToExecute1Type(RecordObject):
 
         self.read_cr1 = Data(3, name="cr_in1")
         self.read_cr2 = Data(3, name="cr_in2")
+        self.read_cr3 = Data(3, name="cr_in2")
         self.read_cr_whole = Signal(reset_less=True)
         self.write_cr = Data(3, name="cr_out")
         self.write_cr_whole = Signal(reset_less=True)
@@ -491,6 +495,7 @@ class PowerDecode2(Elaboratable):
 
         comb += self.e.read_cr1.eq(dec_cr_in.cr_bitfield)
         comb += self.e.read_cr2.eq(dec_cr_in.cr_bitfield_b)
+        comb += self.e.read_cr3.eq(dec_cr_in.cr_bitfield_o)
         comb += self.e.read_cr_whole.eq(dec_cr_in.whole_reg)
 
         comb += self.e.write_cr.eq(dec_cr_out.cr_bitfield)
diff --git a/src/soc/decoder/test/test_decoder_gas.py b/src/soc/decoder/test/test_decoder_gas.py
index 09ee27c5..08862575 100644
--- a/src/soc/decoder/test/test_decoder_gas.py
+++ b/src/soc/decoder/test/test_decoder_gas.py
@@ -422,13 +422,15 @@ class CROp:
 
     def check_results(self, pdecode2):
         cr1 = yield pdecode2.e.read_cr1.data
-        assert cr1 == self.ba//8
+        assert cr1 == self.ba//4
 
         cr2 = yield pdecode2.e.read_cr2.data
-        assert cr2 == self.bb//8
+        assert cr2 == self.bb//4
 
         cr_out = yield pdecode2.e.write_cr.data
-        assert cr_out == self.bt//8
+        cr3 = yield pdecode2.e.read_cr3.data
+        assert cr_out == self.bt//4
+        assert cr3 == self.bt//4