4071

subx: conditional jump instructions

Lots of boilerplate here. This commit really strains my 'copyista'
ethic. But I think it's still clearer to see each instruction
implemented independently than to try to create a macro or something
like that.

1 files changed, 0 insertions, 46 deletions

diff --git a/subx/013immediate_addressing.cc b/subx/013immediate_addressing.cc
index e97b9f6c..dd1ce4c0 100644
--- a/subx/013immediate_addressing.cc
+++ b/subx/013immediate_addressing.cc
@@ -366,49 +366,3 @@ case 0xc7: {  // copy imm32 to r32
   *arg1 = arg2;
   break;
 }
-
-//:: jump
-
-:(scenario jump_rel8)
-# op  ModRM   SIB   displacement  immediate
-  eb                05                        # skip 1 instruction
-  05                              00 00 00 01
-  05                              00 00 00 02
-+run: inst: 0x00000001
-+run: jump 5
-+run: inst: 0x00000008
--run: inst: 0x00000003
-
-:(before "End Single-Byte Opcodes")
-case 0xeb: {  // jump rel8
-  int8_t offset = static_cast<int>(next());
-  trace(2, "run") << "jump " << NUM(offset) << end();
-  EIP += offset;
-  break;
-}
-
-//:
-
-:(scenario jump_rel16)
-# op  ModRM   SIB   displacement  immediate
-  e9                05 00                     # skip 1 instruction
-  05                              00 00 00 01
-  05                              00 00 00 02
-+run: inst: 0x00000001
-+run: jump 5
-+run: inst: 0x00000009
--run: inst: 0x00000003
-
-:(before "End Single-Byte Opcodes")
-case 0xe9: {  // jump rel8
-  int16_t offset = imm16();
-  trace(2, "run") << "jump " << offset << end();
-  EIP += offset;
-  break;
-}
-:(code)
-int16_t imm16() {
-  int16_t result = next();
-  result |= (next()<<8);
-  return result;
-}