diff options
| -rw-r--r-- | subx/014indirect_addressing.cc | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/subx/014indirect_addressing.cc b/subx/014indirect_addressing.cc index dd00c614..3767c46d 100644 --- a/subx/014indirect_addressing.cc +++ b/subx/014indirect_addressing.cc @@ -874,7 +874,7 @@ void test_add_r32_to_mem_at_r32_plus_disp8() { } :(before "End Mod Special-cases(addr)") -case 1: // indirect + disp8 addressing +case 1: { // indirect + disp8 addressing switch (rm) { default: addr = Reg[rm].u; @@ -882,11 +882,16 @@ case 1: // indirect + disp8 addressing break; // End Mod 1 Special-cases(addr) } + int8_t displacement = static_cast<int8_t>(next()); if (addr > 0) { - addr += static_cast<int8_t>(next()); + addr += displacement; trace(Callstack_depth+1, "run") << "effective address is 0x" << HEXWORD << addr << " (after adding disp8)" << end(); } + else { + trace(Callstack_depth+1, "run") << "null address; skipping displacement" << end(); + } break; +} :(code) void test_add_r32_to_mem_at_r32_plus_negative_disp8() { |