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author | Kartik K. Agaram <vc@akkartik.com> | 2018-01-24 21:01:47 -0800 |
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committer | Kartik K. Agaram <vc@akkartik.com> | 2018-01-24 21:14:31 -0800 |
commit | 871ea368d14d0ce474a7db20f13684bdcde2a7e1 (patch) | |
tree | 1a880b871739f1857a9ce2d501b2349a6152a6d8 /subx/012indirect_addressing.cc | |
parent | 631de5d9819531e7428a115e81c8e5e627609f52 (diff) | |
download | mu-871ea368d14d0ce474a7db20f13684bdcde2a7e1.tar.gz |
4189
Diffstat (limited to 'subx/012indirect_addressing.cc')
-rw-r--r-- | subx/012indirect_addressing.cc | 110 |
1 files changed, 55 insertions, 55 deletions
diff --git a/subx/012indirect_addressing.cc b/subx/012indirect_addressing.cc index ca6843d4..579c5255 100644 --- a/subx/012indirect_addressing.cc +++ b/subx/012indirect_addressing.cc @@ -7,15 +7,15 @@ # op ModR/M SIB displacement immediate 01 18 # add EBX to *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest 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 Special-cases") case 0: switch (rm) { default: // mod 0 is usually indirect addressing - trace(2, "run") << "effective address is mem at address 0x" << std::hex << Reg[rm].u << " (" << rname(rm) << ")" << end(); + trace(2, "run") << "effective address is 0x" << std::hex << Reg[rm].u << " (" << rname(rm) << ")" << end(); assert(Reg[rm].u + sizeof(int32_t) <= Mem.size()); result = reinterpret_cast<int32_t*>(&Mem.at(Reg[rm].u)); // rely on the host itself being in little-endian order break; @@ -32,15 +32,15 @@ case 0: # op ModR/M SIB displacement immediate 03 18 # add *EAX to EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: add effective address to EBX -+run: effective address is mem at address 0x60 (EAX) ++run: add r/m32 to EBX ++run: effective address is 0x60 (EAX) +run: storing 0x00000011 :(before "End Single-Byte Opcodes") case 0x03: { // add r/m32 to r32 uint8_t modrm = next(); uint8_t arg1 = (modrm>>3)&0x7; - trace(2, "run") << "add effective address to " << rname(arg1) << end(); + trace(2, "run") << "add r/m32 to " << rname(arg1) << end(); const int32_t* arg2 = effective_address(modrm); BINARY_ARITHMETIC_OP(+, Reg[arg1].i, *arg2); break; @@ -55,8 +55,8 @@ case 0x03: { // add r/m32 to r32 # op ModR/M SIB displacement immediate 29 18 # subtract EBX from *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: subtract EBX from effective address -+run: effective address is mem at address 0x60 (EAX) ++run: subtract EBX from r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0x00000009 //: @@ -68,15 +68,15 @@ case 0x03: { // add r/m32 to r32 # op ModR/M SIB displacement immediate 2b 18 # subtract *EAX from EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: subtract effective address from EBX -+run: effective address is mem at address 0x60 (EAX) ++run: subtract r/m32 from EBX ++run: effective address is 0x60 (EAX) +run: storing 0x00000009 :(before "End Single-Byte Opcodes") case 0x2b: { // subtract r/m32 from r32 uint8_t modrm = next(); uint8_t arg1 = (modrm>>3)&0x7; - trace(2, "run") << "subtract effective address from " << rname(arg1) << end(); + trace(2, "run") << "subtract r/m32 from " << rname(arg1) << end(); const int32_t* arg2 = effective_address(modrm); BINARY_ARITHMETIC_OP(-, Reg[arg1].i, *arg2); break; @@ -91,8 +91,8 @@ case 0x2b: { // subtract r/m32 from r32 # op ModR/M SIB displacement immediate 21 18 # and EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: and EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: and EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0x0000000d //: @@ -104,15 +104,15 @@ case 0x2b: { // subtract r/m32 from r32 # op ModR/M SIB displacement immediate 23 18 # and *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: and effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: and r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: storing 0x0000000d :(before "End Single-Byte Opcodes") case 0x23: { // and r/m32 with r32 uint8_t modrm = next(); uint8_t arg1 = (modrm>>3)&0x7; - trace(2, "run") << "and effective address with " << rname(arg1) << end(); + trace(2, "run") << "and r/m32 with " << rname(arg1) << end(); const int32_t* arg2 = effective_address(modrm); BINARY_BITWISE_OP(&, Reg[arg1].u, *arg2); break; @@ -127,8 +127,8 @@ case 0x23: { // and r/m32 with r32 # op ModR/M SIB displacement immediate 09 18 # or EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: or EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: or EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0xaabbccdd //: @@ -140,15 +140,15 @@ case 0x23: { // and r/m32 with r32 # op ModR/M SIB displacement immediate 0b 18 # or *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: or effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: or r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: storing 0xaabbccdd :(before "End Single-Byte Opcodes") case 0x0b: { // or r/m32 with r32 uint8_t modrm = next(); uint8_t arg1 = (modrm>>3)&0x7; - trace(2, "run") << "or effective address with " << rname(arg1) << end(); + trace(2, "run") << "or r/m32 with " << rname(arg1) << end(); const int32_t* arg2 = effective_address(modrm); BINARY_BITWISE_OP(|, Reg[arg1].u, *arg2); break; @@ -163,8 +163,8 @@ case 0x0b: { // or r/m32 with r32 # op ModR/M SIB displacement immediate 31 18 # xor EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: xor EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: xor EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0x0a0bccdd //: @@ -176,15 +176,15 @@ case 0x0b: { // or r/m32 with r32 # op ModR/M SIB displacement immediate 33 18 # xor *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: xor effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: xor r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: storing 0xaabbccdd :(before "End Single-Byte Opcodes") case 0x33: { // xor r/m32 with r32 uint8_t modrm = next(); uint8_t arg1 = (modrm>>3)&0x7; - trace(2, "run") << "xor effective address with " << rname(arg1) << end(); + trace(2, "run") << "xor r/m32 with " << rname(arg1) << end(); const int32_t* arg2 = effective_address(modrm); BINARY_BITWISE_OP(|, Reg[arg1].u, *arg2); break; @@ -199,8 +199,8 @@ case 0x33: { // xor r/m32 with r32 # op ModR/M SIB displacement immediate f7 03 # negate *EBX # ModR/M in binary: 00 (indirect mode) 000 (unused) 011 (dest EBX) -+run: 'not' of effective address -+run: effective address is mem at address 0x60 (EBX) ++run: 'not' of r/m32 ++run: effective address is 0x60 (EBX) +run: storing 0xf0f0ff00 //:: compare (cmp) @@ -212,8 +212,8 @@ case 0x33: { // xor r/m32 with r32 # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: compare EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: SF=0; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_lesser) @@ -223,8 +223,8 @@ case 0x33: { // xor r/m32 with r32 # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: compare EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: SF=1; ZF=0; OF=0 :(scenario compare_mem_at_r32_with_r32_equal) @@ -234,8 +234,8 @@ case 0x33: { // xor r/m32 with r32 # op ModR/M SIB displacement immediate 39 18 # compare EBX with *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare EBX with effective address -+run: effective address is mem at address 0x60 (EAX) ++run: compare EBX with r/m32 ++run: effective address is 0x60 (EAX) +run: SF=0; ZF=1; OF=0 //: @@ -247,15 +247,15 @@ case 0x33: { // xor r/m32 with r32 # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: compare r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: SF=0; ZF=0; OF=0 :(before "End Single-Byte Opcodes") case 0x3b: { // set SF if r32 < r/m32 uint8_t modrm = next(); uint8_t reg1 = (modrm>>3)&0x7; - trace(2, "run") << "compare effective address with " << rname(reg1) << end(); + trace(2, "run") << "compare r/m32 with " << rname(reg1) << end(); int32_t arg1 = Reg[reg1].i; int32_t* arg2 = effective_address(modrm); int32_t tmp1 = arg1 - *arg2; @@ -274,8 +274,8 @@ case 0x3b: { // set SF if r32 < r/m32 # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: compare r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: SF=1; ZF=0; OF=0 :(scenario compare_r32_with_mem_at_r32_equal) @@ -285,8 +285,8 @@ case 0x3b: { // set SF if r32 < r/m32 # op ModR/M SIB displacement immediate 3b 18 # compare *EAX with EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: compare effective address with EBX -+run: effective address is mem at address 0x60 (EAX) ++run: compare r/m32 with EBX ++run: effective address is 0x60 (EAX) +run: SF=0; ZF=1; OF=0 //:: copy (mov) @@ -297,8 +297,8 @@ case 0x3b: { // set SF if r32 < r/m32 # op ModR/M SIB displacement immediate 89 18 # copy EBX to *EAX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: copy EBX to effective address -+run: effective address is mem at address 0x60 (EAX) ++run: copy EBX to r/m32 ++run: effective address is 0x60 (EAX) +run: storing 0x000000af //: @@ -309,15 +309,15 @@ case 0x3b: { // set SF if r32 < r/m32 # op ModR/M SIB displacement immediate 8b 18 # copy *EAX to EBX # ModR/M in binary: 00 (indirect mode) 011 (src EAX) 000 (dest EAX) -+run: copy effective address to EBX -+run: effective address is mem at address 0x60 (EAX) ++run: copy r/m32 to EBX ++run: effective address is 0x60 (EAX) +run: storing 0x000000af :(before "End Single-Byte Opcodes") case 0x8b: { // copy r32 to r/m32 uint8_t modrm = next(); uint8_t reg1 = (modrm>>3)&0x7; - trace(2, "run") << "copy effective address to " << rname(reg1) << end(); + trace(2, "run") << "copy r/m32 to " << rname(reg1) << end(); int32_t* arg2 = effective_address(modrm); Reg[reg1].i = *arg2; trace(2, "run") << "storing 0x" << HEXWORD << *arg2 << end(); @@ -335,8 +335,8 @@ case 0x8b: { // copy r32 to r/m32 05 00 00 00 01 05 00 00 00 02 +run: inst: 0x00000001 -+run: jump to effective address -+run: effective address is mem at address 0x60 (EAX) ++run: jump to r/m32 ++run: effective address is 0x60 (EAX) +run: jumping to 0x00000008 +run: inst: 0x00000008 -run: inst: 0x00000003 @@ -347,7 +347,7 @@ case 0xff: { uint8_t subop = (modrm>>3)&0x7; // middle 3 'reg opcode' bits switch (subop) { case 4: { // jump to r/m32 - trace(2, "run") << "jump to effective address" << end(); + trace(2, "run") << "jump to r/m32" << end(); int32_t* arg2 = effective_address(modrm); EIP = *arg2; trace(2, "run") << "jumping to 0x" << HEXWORD << EIP << end(); @@ -367,14 +367,14 @@ case 0xff: { # op ModR/M SIB displacement immediate ff 30 # push *EAX to stack # ModR/M in binary: 00 (indirect mode) 110 (push r/m32) 000 (src EAX) -+run: push effective address -+run: effective address is mem at address 0x60 (EAX) ++run: push r/m32 ++run: effective address is 0x60 (EAX) +run: decrementing ESP to 0x00000010 +run: pushing value 0x000000af :(before "End Op ff Subops") case 6: { // push r/m32 to stack - trace(2, "run") << "push effective address" << end(); + trace(2, "run") << "push r/m32" << end(); const int32_t* val = effective_address(modrm); push(*val); break; @@ -389,8 +389,8 @@ case 6: { // push r/m32 to stack # op ModR/M SIB displacement immediate 8f 00 # pop stack into *EAX # ModR/M in binary: 00 (indirect mode) 000 (pop r/m32) 000 (dest EAX) -+run: pop into effective address -+run: effective address is mem at address 0x60 (EAX) ++run: pop into r/m32 ++run: effective address is 0x60 (EAX) +run: popping value 0x00000030 +run: incrementing ESP to 0x00000014 @@ -400,7 +400,7 @@ case 0x8f: { // pop stack into r/m32 uint8_t subop = (modrm>>3)&0x7; switch (subop) { case 0: { - trace(2, "run") << "pop into effective address" << end(); + trace(2, "run") << "pop into r/m32" << end(); int32_t* dest = effective_address(modrm); *dest = pop(); break; |