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authorGabe Black <gblack@eecs.umich.edu>2009-11-08 15:49:03 -0800
committerGabe Black <gblack@eecs.umich.edu>2009-11-08 15:49:03 -0800
commit8a4af3668dd8c45de4b98f3eb1fb2ef28bd369a2 (patch)
treecd0beb09718015568cd9adfd8edd75e710a37656 /src/arch/arm
parentbb903b6514b743e93e429929776639879d6c59a7 (diff)
downloadgem5-8a4af3668dd8c45de4b98f3eb1fb2ef28bd369a2.tar.xz
ARM: Support forcing load/store multiple to use user registers.
Diffstat (limited to 'src/arch/arm')
-rw-r--r--src/arch/arm/insts/macromem.hh25
-rw-r--r--src/arch/arm/intregs.hh7
-rw-r--r--src/arch/arm/isa.hh5
-rw-r--r--src/arch/arm/isa/formats/macromem.isa21
4 files changed, 32 insertions, 26 deletions
diff --git a/src/arch/arm/insts/macromem.hh b/src/arch/arm/insts/macromem.hh
index 541c9e3f5..714b8bb7e 100644
--- a/src/arch/arm/insts/macromem.hh
+++ b/src/arch/arm/insts/macromem.hh
@@ -84,33 +84,20 @@ class MicroMemOp : public MicroIntOp
*/
class ArmMacroMemoryOp : public PredMacroOp
{
- protected:
+ protected:
/// Memory request flags. See mem_req_base.hh.
unsigned memAccessFlags;
uint32_t reglist;
uint32_t ones;
- uint32_t puswl,
- prepost,
- up,
- psruser,
- writeback,
- loadop;
ArmMacroMemoryOp(const char *mnem, ExtMachInst _machInst,
OpClass __opClass)
- : PredMacroOp(mnem, _machInst, __opClass),
- memAccessFlags(0),
- reglist(machInst.regList), ones(0),
- puswl(machInst.puswl),
- prepost(machInst.puswl.prepost),
- up(machInst.puswl.up),
- psruser(machInst.puswl.psruser),
- writeback(machInst.puswl.writeback),
- loadop(machInst.puswl.loadOp)
+ : PredMacroOp(mnem, _machInst, __opClass), memAccessFlags(0),
+ reglist(machInst.regList), ones(0)
{
ones = number_of_ones(reglist);
- numMicroops = ones + writeback + 1;
+ numMicroops = ones + machInst.puswl.writeback + 1;
// Remember that writeback adds a uop
microOps = new StaticInstPtr[numMicroops];
}
@@ -121,7 +108,7 @@ class ArmMacroMemoryOp : public PredMacroOp
*/
class ArmMacroFPAOp : public PredMacroOp
{
- protected:
+ protected:
uint32_t puswl,
prepost,
up,
@@ -150,7 +137,7 @@ class ArmMacroFPAOp : public PredMacroOp
*/
class ArmMacroFMOp : public PredMacroOp
{
- protected:
+ protected:
uint32_t punwl,
prepost,
up,
diff --git a/src/arch/arm/intregs.hh b/src/arch/arm/intregs.hh
index b5f955c4b..0c2fc5fbb 100644
--- a/src/arch/arm/intregs.hh
+++ b/src/arch/arm/intregs.hh
@@ -324,6 +324,13 @@ INTREG_FIQ(unsigned index)
return IntRegFiqMap[index];
}
+static inline IntRegIndex
+intRegForceUser(unsigned index)
+{
+ assert(index < NUM_ARCH_INTREGS);
+ return (IntRegIndex)(index + NUM_INTREGS);
+}
+
}
#endif
diff --git a/src/arch/arm/isa.hh b/src/arch/arm/isa.hh
index f8359679b..a4a328614 100644
--- a/src/arch/arm/isa.hh
+++ b/src/arch/arm/isa.hh
@@ -125,8 +125,11 @@ namespace ArmISA
assert(reg >= 0);
if (reg < NUM_ARCH_INTREGS) {
return intRegMap[reg];
+ } else if (reg < NUM_INTREGS) {
+ return reg;
} else {
- assert(reg < NUM_INTREGS);
+ reg -= NUM_INTREGS;
+ assert(reg < NUM_ARCH_INTREGS);
return reg;
}
}
diff --git a/src/arch/arm/isa/formats/macromem.isa b/src/arch/arm/isa/formats/macromem.isa
index 8c8ba8a1a..9a3185af3 100644
--- a/src/arch/arm/isa/formats/macromem.isa
+++ b/src/arch/arm/isa/formats/macromem.isa
@@ -180,11 +180,12 @@ inline %(class_name)s::%(class_name)s(ExtMachInst machInst)
%(constructor)s;
uint32_t regs = reglist;
uint32_t addr = 0;
+ bool up = machInst.puswl.up;
if (!up)
addr = (ones << 2) - 4;
- if (prepost)
+ if (machInst.puswl.prepost)
addr += 4;
// Add 0 to Rn and stick it in ureg0.
@@ -198,10 +199,18 @@ inline %(class_name)s::%(class_name)s(ExtMachInst machInst)
reg++;
replaceBits(regs, reg, 0);
- if (loadop)
- microOps[i] = new MicroLdrUop(machInst, reg, INTREG_UREG0, addr);
- else
- microOps[i] = new MicroStrUop(machInst, reg, INTREG_UREG0, addr);
+ unsigned regIdx = reg;
+ if (machInst.puswl.psruser) {
+ regIdx = intRegForceUser(regIdx);
+ }
+
+ if (machInst.puswl.loadOp) {
+ microOps[i] =
+ new MicroLdrUop(machInst, regIdx, INTREG_UREG0, addr);
+ } else {
+ microOps[i] =
+ new MicroStrUop(machInst, regIdx, INTREG_UREG0, addr);
+ }
if (up)
addr += 4;
@@ -210,7 +219,7 @@ inline %(class_name)s::%(class_name)s(ExtMachInst machInst)
}
StaticInstPtr &lastUop = microOps[numMicroops - 1];
- if (writeback) {
+ if (machInst.puswl.writeback) {
if (up) {
lastUop = new MicroAddiUop(machInst, RN, RN, ones * 4);
} else {