• Assembly instructions to opcode conversion
    Hello, I would like to know if there is any pattern that the compiler follows to write the correspoding opcode into the .hex file I tried to figure out patterns, but there is always some other instruction...
  • Where can we find the opcode for ARMv8 instructions?
    Note: This was originally posted on 24th August 2012 at http://forums.arm.com I had download the toolchain for ARMv8( http://gcc.gnu.org/ml/gcc-patches/2012-05/msg01694.html ),and I want find the encoding...
  • About Opcodes in 8051 Instruction Set Manual
    http://www.keil.com/support/man/docs/is51/is51_opcodes.htm lists 8051 instructions by HEX code. I had saw a line and make me confused. Why MOV direct, R8 appear in Hex Code 90 ? I mean, in other...
  • armasm push unknown opcode error
    Note: This was originally posted on 8th April 2008 at http://forums.arm.com Hi, I am trying to compile a .s file using armasm. But i am getting this error "VectorTransform.s", line 8: Error: A1163E: Unknown...
  • undefined instruction exception
    We are using ARM Toolset , Toolchain MDK-ARM Professional Version 5.21a and Device is LPC2388. We are trying to create a "undefined instruction exception" on a "BL" instruction in the thumb mode...