diff options
Diffstat (limited to 'qtmips_machine/core.cpp')
| -rw-r--r-- | qtmips_machine/core.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/qtmips_machine/core.cpp b/qtmips_machine/core.cpp index fd6c6f4..5ce0c70 100644 --- a/qtmips_machine/core.cpp +++ b/qtmips_machine/core.cpp @@ -133,7 +133,7 @@ struct Core::dtExecute Core::execute(const struct dtDecode &dt) { std::uint32_t alu_sec = dt.val_rt; if (dt.alusrc) - alu_sec = ((dt.inst.immediate() & 0x8000) << 16) | (dt.inst.immediate() & 0x7FFF); // Sign extend to 32bit + alu_sec = ((dt.inst.immediate() & 0x8000) ? 0xFFFF0000 : 0) | (dt.inst.immediate()); // Sign extend to 32bit return { .inst = dt.inst, @@ -217,7 +217,7 @@ void Core::handle_pc(const struct dtDecode &dt) { } if (branch) - regs->pc_jmp((std::int32_t)(((dt.inst.immediate() & 0x7fff) << 2) | ((dt.inst.immediate() & 0x8000) << 16))); + regs->pc_jmp((std::int32_t)(((dt.inst.immediate() & 0x8000) ? 0xFFFF0000 : 0) | (dt.inst.immediate() << 2))); else regs->pc_inc(); } |