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Topic: Instruction set


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JVM

In the News (Thu 21 Mar 19)

  
  The ARM Instruction Set Architecture
The ARMv4T architecture added the 16-bit Thumb® instruction set which enabled compilers to generate more compact code (memory savings of up to 35% over the equivalent 32-bit code), while retaining all the benefits of a 32-bit system.
The Thumb changes added a few new instructions along with improvements to Thumb/ARM interworking, greatly improving compiler capabilities and the ability to mix and match ARM versus Thumb routines to balance code size and performance.
The ‘E’ instruction set extensions were designed to provide a DSP capability in a general purpose CPU, resulting in improved performance and flexibility.
www.arm.com /products/CPUs/architecture.html   (1217 words)

  
 PA-RISC 2.0 instruction set architecture (HTML)
All of HP PA-RISC 2.0 instruction set architecture (HTML)
j - pa-risc 2 instruction completers and pseudo-ops
The information contained in this document is subject to change without notice.
h21007.www2.hp.com /dspp/tech/tech_TechDocumentDetailPage_IDX/1,1701,959,00.html   (150 words)

  
  Instruction Set Architecture - LinuxMIPS
This is the basic MIPS instruction set as implemented by the original R2000 and R3000 processors.
The FPU's instruction set was improved by support of 64-bit loads and stores which half the number of instructions need to load or store a double precission floating point register on MIPS I. edit] MIPS III
The R8000 was the first to implement the MIPS IV instruction set.
www.linux-mips.org /wiki/Instruction_Set_Architecture   (583 words)

  
  Embedded.com - Instruction Set Simulation in C   (Site not responding. Last check: )
The instruction set consists of 35 fixed-size opcodes.
Typical instruction set simulators are programs that load the development code in the form of a binary executable.
An alternative approach is to simulate the instruction set as a collection of C functions and macros.
www.embedded.com /story/OEG20020226S0045   (2439 words)

  
  Atari "Sally" (6502) Instruction Set
In decimal mode, N and V are set after the high-order nibble is added or subtracted but before it is decimal-corrected, according to binary rules.
Z is always set according to binary mode, not decimal.
V is set according to the function: (A
www.xmission.com /~trevin/atari/6502_insn_set.html   (280 words)

  
 The Instruction Set File   (Site not responding. Last check: )
An instruction set file consists of a list of instructions that belong to that instruction set, each of which is followed by a series of numbers that define how that instruction should be used.
This instruction reads the contents of the organism's memory at the position of the read-head, and copy that to the position of the write-head.
The BX register will be set to the distance to the complement from the current position of the instruction-pointer, and the CX register will be set to the size of the template.
dllab.caltech.edu /avida/v2.0/docs/inst_set.html   (1159 words)

  
 Chapter Five Instruction Set Architecture   (Site not responding. Last check: )
To encode an instruction we must pick a unique numeric opcode value for each instruction (clearly, two different instructions cannot share the same numeric value or the CPU will not be able to differentiate them when it attempts to decode the opcode value).
If you were using the instruction encoding appearing in Figure 5.2 for your opcode format, it might not be a bad idea to reserve one block of 64 one-byte opcodes, half (4,096) of the two-byte instructions, and half (1,048,576) of the three-byte opcodes for future use.
Intel studied their instruction set and came to the conclusion that in a 32-bit environment, programs were more likely to use eight-bit and 32-bit operands far more often than 16-bit operands.
webster.cs.ucr.edu /AoA/Linux/HTML/ISA.html   (10790 words)

  
 VM Spec The Java Virtual Machine Instruction Set
A Java virtual machine instruction consists of an opcode specifying the operation to be performed, followed by zero or more operands embodying values to be operated upon.
Some instructions are presented as members of a family of related instructions sharing a single description, format, and operand stack diagram.
In the description of the Java virtual machine instructions, the effect of an instruction's execution on the operand stack (§3.6.2) of the current frame (§3.6) is represented textually, with the stack growing from left to right and each value represented separately.
java.sun.com /docs/books/vmspec/2nd-edition/html/Instructions.doc.html   (1041 words)

  
 Chapter Four
As with the LOAD instructions, the value stored in either the accumulator or the registers, depending on which instruction is used, is not changed by the execution of the instruction.
These instructions perform the indicated operations directly on the flags of the processor status register, and their operation, which is self-explanatory, is further described in Appendix 1.
These four SHIFT instructions are used to multiply or divide by powers of 2, since by rotating bits to the left, we double a number, and by rotating bits to the right, we effectively divide a number by 2.
www.atariarchives.org /alp/chapter_4.php   (3093 words)

  
 Chapter Eleven The MMX Instruction Set   (Site not responding. Last check: )
The MMX instruction set supports four different data types: an eight-byte array, a four-word array, a two element double word array, and a quadword object.
11.4 The Purpose of the MMX Instruction Set
One drawback to the MMX instruction set is that it is not general purpose.
webster.cs.ucr.edu /AoA/Windows/HTML/TheMMXInstructionSet.html   (3686 words)

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