Handle load flags (e.g., sign/zero extension, NaN boxing) at the end of ReadMem() regardless of whether RevMem or MemH is used.
Previously, the integer/floating-point load execute functions performed the operation on the destination register regardless of whether RevMem or MemH was used, causing a garbage temporary result in the destination register if MemH was used.
Use memcpy() and separate 1/2/4-byte variables to make the code C++-compliant and independent of host machine's endianness. Previously, the code assumed a little-endian host and performed undefined behavior with pointer casting, which violates the C/C++ strict aliasing rule (it is undefined behavior to cast a pointer from one type to another and then dereference it, unless the second type is a char).
Add another pseudoinstruction: ra as destination register is implicit in jal instruction -- objdump and other disassemblers do not list ra as a destination register but make it implicit by leaving it out of the disassembly -- only non-ra destination registers are explicitly listed in disassembly.
Handle load flags (e.g., sign/zero extension, NaN boxing) at the end of
ReadMem()regardless of whetherRevMemorMemHis used.Previously, the integer/floating-point load execute functions performed the operation on the destination register regardless of whether
RevMemorMemHwas used, causing a garbage temporary result in the destination register ifMemHwas used.Use
memcpy()and separate 1/2/4-byte variables to make the code C++-compliant and independent of host machine's endianness. Previously, the code assumed a little-endian host and performed undefined behavior with pointer casting, which violates the C/C++ strict aliasing rule (it is undefined behavior to cast a pointer from one type to another and then dereference it, unless the second type is achar).Add another pseudoinstruction:
raas destination register is implicit injalinstruction --objdumpand other disassemblers do not listraas a destination register but make it implicit by leaving it out of the disassembly -- only non-radestination registers are explicitly listed in disassembly.