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-rw-r--r--src/cpu/o3/regfile.hh157
1 files changed, 84 insertions, 73 deletions
diff --git a/src/cpu/o3/regfile.hh b/src/cpu/o3/regfile.hh
index a5cfa8f3c..ade5e4e56 100644
--- a/src/cpu/o3/regfile.hh
+++ b/src/cpu/o3/regfile.hh
@@ -24,15 +24,17 @@
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Kevin Lim
+ * Gabe Black
*/
-#ifndef __CPU_O3_CPU_REGFILE_HH__
-#define __CPU_O3_CPU_REGFILE_HH__
-
-// @todo: Destructor
+#ifndef __CPU_O3_REGFILE_HH__
+#define __CPU_O3_REGFILE_HH__
#include "arch/isa_traits.hh"
#include "arch/faults.hh"
+#include "arch/types.hh"
#include "base/trace.hh"
#include "config/full_system.hh"
#include "cpu/o3/comm.hh"
@@ -42,32 +44,40 @@
#endif
-// This really only depends on the ISA, and not the Impl. It might be nicer
-// to see if I can make it depend on nothing...
-// Things that are in the ifdef FULL_SYSTEM are pretty dependent on the ISA,
-// and should go in the AlphaFullCPU.
+#include <vector>
+/**
+ * Simple physical register file class.
+ * Right now this is specific to Alpha until we decide if/how to make things
+ * generic enough to support other ISAs.
+ */
template <class Impl>
class PhysRegFile
{
protected:
typedef TheISA::IntReg IntReg;
typedef TheISA::FloatReg FloatReg;
+ typedef TheISA::FloatRegBits FloatRegBits;
typedef TheISA::MiscRegFile MiscRegFile;
typedef TheISA::MiscReg MiscReg;
- //Note that most of the definitions of the IntReg, FloatReg, etc. exist
- //within the Impl/ISA class and not within this PhysRegFile class.
+ typedef union {
+ FloatReg d;
+ FloatRegBits q;
+ } PhysFloatReg;
- //Will need some way to allow stuff like swap_palshadow to access the
- //correct registers. Might require code changes to swap_palshadow and
- //other execution contexts.
+ // Note that most of the definitions of the IntReg, FloatReg, etc. exist
+ // within the Impl/ISA class and not within this PhysRegFile class.
- //Will make these registers public for now, but they probably should
- //be private eventually with some accessor functions.
+ // Will make these registers public for now, but they probably should
+ // be private eventually with some accessor functions.
public:
typedef typename Impl::FullCPU FullCPU;
+ /**
+ * Constructs a physical register file with the specified amount of
+ * integer and floating point registers.
+ */
PhysRegFile(unsigned _numPhysicalIntRegs,
unsigned _numPhysicalFloatRegs);
@@ -80,12 +90,13 @@ class PhysRegFile
// void serialize(std::ostream &os);
// void unserialize(Checkpoint *cp, const std::string &section);
+ /** Reads an integer register. */
uint64_t readIntReg(PhysRegIndex reg_idx)
{
assert(reg_idx < numPhysicalIntRegs);
DPRINTF(IEW, "RegFile: Access to int register %i, has data "
- "%i\n", int(reg_idx), intRegFile[reg_idx]);
+ "%#x\n", int(reg_idx), intRegFile[reg_idx]);
return intRegFile[reg_idx];
}
@@ -96,14 +107,15 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- FloatReg floatReg = floatRegFile.readReg(reg_idx, width);
+ FloatReg floatReg = floatRegFile[reg_idx].d;
DPRINTF(IEW, "RegFile: Access to %d byte float register %i, has "
- "data %8.8d\n", int(reg_idx), (double)floatReg);
+ "data %#x\n", int(reg_idx), floatRegFile[reg_idx].q);
return floatReg;
}
+ /** Reads a floating point register (double precision). */
FloatReg readFloatReg(PhysRegIndex reg_idx)
{
// Remove the base Float reg dependency.
@@ -111,14 +123,15 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- FloatReg floatReg = floatRegFile.readReg(reg_idx);
+ FloatReg floatReg = floatRegFile[reg_idx].d;
DPRINTF(IEW, "RegFile: Access to float register %i, has "
- "data %8.8d\n", int(reg_idx), (double)floatReg);
+ "data %#x\n", int(reg_idx), floatRegFile[reg_idx].q);
return floatReg;
}
+ /** Reads a floating point register as an integer. */
FloatRegBits readFloatRegBits(PhysRegIndex reg_idx, int width)
{
// Remove the base Float reg dependency.
@@ -126,10 +139,10 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- FloatRegBits floatRegBits = floatRegFile.readRegBits(reg_idx, width);
+ FloatRegBits floatRegBits = floatRegFile[reg_idx].q;
- DPRINTF(IEW, "RegFile: Access to %d byte float register %i as int, "
- "has data %lli\n", int(reg_idx), (uint64_t)floatRegBits);
+ DPRINTF(IEW, "RegFile: Access to float register %i as int, "
+ "has data %#x\n", int(reg_idx), (uint64_t)floatRegBits);
return floatRegBits;
}
@@ -141,24 +154,27 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- FloatRegBits floatRegBits = floatRegFile.readRegBits(reg_idx);
+ FloatRegBits floatRegBits = floatRegFile[reg_idx].q;
DPRINTF(IEW, "RegFile: Access to float register %i as int, "
- "has data %lli\n", int(reg_idx), (uint64_t)floatRegBits);
+ "has data %#x\n", int(reg_idx), (uint64_t)floatRegBits);
return floatRegBits;
}
+ /** Sets an integer register to the given value. */
void setIntReg(PhysRegIndex reg_idx, uint64_t val)
{
assert(reg_idx < numPhysicalIntRegs);
- DPRINTF(IEW, "RegFile: Setting int register %i to %lli\n",
+ DPRINTF(IEW, "RegFile: Setting int register %i to %#x\n",
int(reg_idx), val);
- intRegFile[reg_idx] = val;
+ if (reg_idx != TheISA::ZeroReg)
+ intRegFile[reg_idx] = val;
}
+ /** Sets a single precision floating point register to the given value. */
void setFloatReg(PhysRegIndex reg_idx, FloatReg val, int width)
{
// Remove the base Float reg dependency.
@@ -166,12 +182,14 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- DPRINTF(IEW, "RegFile: Setting float register %i to %8.8d\n",
- int(reg_idx), (double)val);
+ DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
+ int(reg_idx), (uint64_t)val);
- floatRegFile.setReg(reg_idx, val, width);
+ if (reg_idx != TheISA::ZeroReg)
+ floatRegFile[reg_idx].d = val;
}
+ /** Sets a double precision floating point register to the given value. */
void setFloatReg(PhysRegIndex reg_idx, FloatReg val)
{
// Remove the base Float reg dependency.
@@ -179,12 +197,14 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- DPRINTF(IEW, "RegFile: Setting float register %i to %8.8d\n",
- int(reg_idx), (double)val);
+ DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
+ int(reg_idx), (uint64_t)val);
- floatRegFile.setReg(reg_idx, val);
+ if (reg_idx != TheISA::ZeroReg)
+ floatRegFile[reg_idx].d = val;
}
+ /** Sets a floating point register to the given integer value. */
void setFloatRegBits(PhysRegIndex reg_idx, FloatRegBits val, int width)
{
// Remove the base Float reg dependency.
@@ -192,10 +212,10 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- DPRINTF(IEW, "RegFile: Setting float register %i to %lli\n",
+ DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
int(reg_idx), (uint64_t)val);
- floatRegFile.setRegBits(reg_idx, val, width);
+ floatRegFile[reg_idx].q = val;
}
void setFloatRegBits(PhysRegIndex reg_idx, FloatRegBits val)
@@ -205,81 +225,68 @@ class PhysRegFile
assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs);
- DPRINTF(IEW, "RegFile: Setting float register %i to %lli\n",
+ DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n",
int(reg_idx), (uint64_t)val);
- floatRegFile.setRegBits(reg_idx, val);
- }
-
- uint64_t readPC()
- {
- return pc;
+ floatRegFile[reg_idx].q = val;
}
- void setPC(uint64_t val)
+ MiscReg readMiscReg(int misc_reg, unsigned thread_id)
{
- pc = val;
+ return miscRegs[thread_id].readReg(misc_reg);
}
- void setNextPC(uint64_t val)
+ MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault,
+ unsigned thread_id)
{
- npc = val;
+ return miscRegs[thread_id].readRegWithEffect(misc_reg, fault,
+ cpu->tcBase(thread_id));
}
- //Consider leaving this stuff and below in some implementation specific
- //file as opposed to the general register file. Or have a derived class.
- MiscReg readMiscReg(int misc_reg)
+ Fault setMiscReg(int misc_reg, const MiscReg &val, unsigned thread_id)
{
- // Dummy function for now.
- // @todo: Fix this once proxy XC is used.
- return 0;
+ return miscRegs[thread_id].setReg(misc_reg, val);
}
- Fault setMiscReg(int misc_reg, const MiscReg &val)
+ Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val,
+ unsigned thread_id)
{
- // Dummy function for now.
- // @todo: Fix this once proxy XC is used.
- return NoFault;
+ return miscRegs[thread_id].setRegWithEffect(misc_reg, val,
+ cpu->tcBase(thread_id));
}
#if FULL_SYSTEM
int readIntrFlag() { return intrflag; }
+ /** Sets an interrupt flag. */
void setIntrFlag(int val) { intrflag = val; }
#endif
- // These should be private eventually, but will be public for now
- // so that I can hack around the initregs issue.
public:
/** (signed) integer register file. */
IntReg *intRegFile;
/** Floating point register file. */
- FloatReg *floatRegFile;
+ PhysFloatReg *floatRegFile;
/** Miscellaneous register file. */
- MiscRegFile miscRegs;
-
- /** Program counter. */
- Addr pc;
-
- /** Next-cycle program counter. */
- Addr npc;
+ MiscRegFile miscRegs[Impl::MaxThreads];
#if FULL_SYSTEM
private:
- // This is ISA specifc stuff; remove it eventually once ISAImpl is used
-// IntReg palregs[NumIntRegs]; // PAL shadow registers
int intrflag; // interrupt flag
- bool pal_shadow; // using pal_shadow registers
#endif
private:
+ /** CPU pointer. */
FullCPU *cpu;
public:
+ /** Sets the CPU pointer. */
void setCPU(FullCPU *cpu_ptr) { cpu = cpu_ptr; }
+ /** Number of physical integer registers. */
unsigned numPhysicalIntRegs;
+ /** Number of physical floating point registers. */
unsigned numPhysicalFloatRegs;
};
@@ -290,10 +297,14 @@ PhysRegFile<Impl>::PhysRegFile(unsigned _numPhysicalIntRegs,
numPhysicalFloatRegs(_numPhysicalFloatRegs)
{
intRegFile = new IntReg[numPhysicalIntRegs];
- floatRegFile = new FloatReg[numPhysicalFloatRegs];
+ floatRegFile = new PhysFloatReg[numPhysicalFloatRegs];
- memset(intRegFile, 0, sizeof(*intRegFile));
- memset(floatRegFile, 0, sizeof(*floatRegFile));
+ for (int i = 0; i < Impl::MaxThreads; ++i) {
+ miscRegs[i].clear();
+ }
+
+ memset(intRegFile, 0, sizeof(IntReg) * numPhysicalIntRegs);
+ memset(floatRegFile, 0, sizeof(PhysFloatReg) * numPhysicalFloatRegs);
}
-#endif // __CPU_O3_CPU_REGFILE_HH__
+#endif
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