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| author | Kartik K. Agaram <vc@akkartik.com> | 2018-01-24 21:01:47 -0800 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2018-01-24 21:14:31 -0800 |
| commit | 871ea368d14d0ce474a7db20f13684bdcde2a7e1 (patch) | |
| tree | 1a880b871739f1857a9ce2d501b2349a6152a6d8 /subx/014index_addressing.cc | |
| parent | 631de5d9819531e7428a115e81c8e5e627609f52 (diff) | |
| download | mu-871ea368d14d0ce474a7db20f13684bdcde2a7e1.tar.gz | |
4189
Diffstat (limited to 'subx/014index_addressing.cc')
| -rw-r--r-- | subx/014index_addressing.cc | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/subx/014index_addressing.cc b/subx/014index_addressing.cc index 8e032f38..723a243a 100644 --- a/subx/014index_addressing.cc +++ b/subx/014index_addressing.cc @@ -8,8 +8,8 @@ 01 1c 20 # add EBX to *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EBX) 100 (dest in SIB) # SIB in binary: 00 (scale 1) 100 (no index) 000 (base EAX) -+run: add EBX to effective address -+run: effective address is mem at address 0x60 (EAX) ++run: add EBX to r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0x00000011 :(before "End Mod 0 Special-cases") @@ -45,13 +45,13 @@ uint32_t effective_address_from_sib(uint8_t mod) { uint8_t index = (sib>>3)&0x7; if (index == ESP) { // ignore index and scale - trace(2, "run") << "effective address is mem at address 0x" << std::hex << Reg[base].u << " (" << rname(base) << ")" << end(); + trace(2, "run") << "effective address is 0x" << std::hex << Reg[base].u << " (" << rname(base) << ")" << end(); return Reg[base].u; } else { uint8_t scale = (1 << (sib>>6)); uint32_t addr = Reg[base].u + Reg[index].i*scale; // treat index register as signed. Maybe base as well? But we'll always ensure it's non-negative. - trace(2, "run") << "effective address is mem at address 0x" << std::hex << addr << " (" << rname(base) << " + " << rname(index) << "*" << NUM(scale) << ")" << end(); + trace(2, "run") << "effective address is 0x" << std::hex << addr << " (" << rname(base) << " + " << rname(index) << "*" << NUM(scale) << ")" << end(); return addr; } } @@ -65,6 +65,6 @@ uint32_t effective_address_from_sib(uint8_t mod) { 01 1c 08 # add EBX to *(EAX+ECX) # ModR/M in binary: 00 (indirect mode) 011 (src EBX) 100 (dest in SIB) # SIB in binary: 00 (scale 1) 001 (index ECX) 000 (base EAX) -+run: add EBX to effective address -+run: effective address is mem at address 0x60 (EAX + ECX*1) ++run: add EBX to r/m32 ++run: effective address is 0x60 (EAX + ECX*1) +run: storing 0x00000011 |