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author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:04 -0500 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:04 -0500 |
commit | 739f23c64c88c2c5d57085eae7687e16cb0a90f6 (patch) | |
tree | 84b67b86e49946fc739505e67b1c07ecfeeaa63f /src | |
parent | cb631d87c3cb676e9d25c3ffbcd76580a3393b05 (diff) | |
download | gem5-739f23c64c88c2c5d57085eae7687e16cb0a90f6.tar.xz |
ARM: Add base classes for VFP load/store multiple.
Diffstat (limited to 'src')
-rw-r--r-- | src/arch/arm/insts/macromem.cc | 60 | ||||
-rw-r--r-- | src/arch/arm/insts/macromem.hh | 8 |
2 files changed, 68 insertions, 0 deletions
diff --git a/src/arch/arm/insts/macromem.cc b/src/arch/arm/insts/macromem.cc index bb69f0991..35ec686fe 100644 --- a/src/arch/arm/insts/macromem.cc +++ b/src/arch/arm/insts/macromem.cc @@ -118,4 +118,64 @@ MacroMemOp::MacroMemOp(const char *mnem, ExtMachInst machInst, lastUop->setLastMicroop(); } +MacroVFPMemOp::MacroVFPMemOp(const char *mnem, ExtMachInst machInst, + OpClass __opClass, IntRegIndex rn, + RegIndex vd, bool single, bool up, + bool writeback, bool load, uint32_t offset) : + PredMacroOp(mnem, machInst, __opClass) +{ + const int maxMicroops = 17; + microOps = new StaticInstPtr[maxMicroops]; + int i = 0; + + // The lowest order bit selects fldmx (set) or fldmd (clear). These seem + // to be functionally identical except that fldmx is deprecated. For now + // we'll assume they're otherwise interchangable. + int count = (single ? offset : (offset / 2)); + if (count == 0 || count > NumFloatArchRegs) + warn_once("Bad offset field for VFP load/store multiple.\n"); + if (count == 0) { + // Force there to be at least one microop so the macroop makes sense. + writeback = true; + } + if (count > NumFloatArchRegs) + count = NumFloatArchRegs; + + uint32_t addr = 0; + + if (up) + addr = -4 * offset; + + for (int j = 0; j < count; j++) { + if (load) { + microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, + true, addr); + if (!single) + microOps[i++] = new MicroLdrFpUop(machInst, vd++, rn, + true, addr + 4); + } else { + microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, + true, addr); + if (!single) + microOps[i++] = new MicroStrFpUop(machInst, vd++, rn, + true, addr + 4); + } + addr += (single ? 4 : 8); + } + + if (writeback) { + if (up) { + microOps[i++] = + new MicroAddiUop(machInst, rn, rn, 4 * offset); + } else { + microOps[i++] = + new MicroSubiUop(machInst, rn, rn, 4 * offset); + } + } + + numMicroops = i; + assert(numMicroops <= maxMicroops); + microOps[numMicroops - 1]->setLastMicroop(); +} + } diff --git a/src/arch/arm/insts/macromem.hh b/src/arch/arm/insts/macromem.hh index 8cad32710..21a37a29e 100644 --- a/src/arch/arm/insts/macromem.hh +++ b/src/arch/arm/insts/macromem.hh @@ -101,6 +101,14 @@ class MacroMemOp : public PredMacroOp bool writeback, bool load, uint32_t reglist); }; +class MacroVFPMemOp : public PredMacroOp +{ + protected: + MacroVFPMemOp(const char *mnem, ExtMachInst machInst, OpClass __opClass, + IntRegIndex rn, RegIndex vd, bool single, bool up, + bool writeback, bool load, uint32_t offset); +}; + } #endif //__ARCH_ARM_INSTS_MACROMEM_HH__ |