By James S. Evans
ISBN-10: 0131013726
ISBN-13: 9780131013728
Itanium(R) structure for Programmers is a complete creation to the step forward features of the hot 64-bit Itanium structure. utilizing general command-line instruments and vast examples, the authors remove darkness from the Itanium layout in the broader context of latest machine structure through a step by step research of Itanium meeting language. assurance includes:The power of Explicitly Parallel guide Computing (EPIC) Itanium guideline codecs and addressing modes thoughts resembling the sign in stack engine (RSE) and large predication process calls and procedure-calling mechanisms Floating-point operations I/O recommendations, from basic debugging to using documents Optimization of output from open resource, Intel, and HP-UX compilersAn crucial source for either computing pros and scholars of structure or meeting language, Itanium structure for Programmers contains huge revealed and Web-based references, plus many numeric, essay, and programming routines for every bankruptcy.
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Extra resources for Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles
Example text
MOVE TEMP TO SQ1. ADD DIFF2 TO DIFF1 GIVING DIFF1. ADD DIFF1 TO TEMP GIVING TEMP. MOVE TEMP TO SQ2. ADD DIFF2 TO DIFF1 GIVING DIFF1. ADD DIFF1 TO TEMP GIVING TEMP. MOVE TEMP TO SQ3. DISPLAY-RESULTS SECTION. DISPLAY OUTPUT-FIELD. * EXIT PROGRAM. END PROGRAM SQUARES. It should be evident that the pattern of first adjusting diff1, then using diff1 to adjust temp, and finally storing temp as the next square could be iterated any desired number of times to compute sq4, etc. 2 Assembly Language for Itanium Architecture Now let us transform the expression of this algorithm from a 3GL implementation into a 2GL equivalent in Itanium assembly language.
Learning assembly language is a good way to learn about computer architecture. We showed what a simple algorithm looks like expressed in assembly language for Itanium architecture, and contrasted that to high-level languages. This chapter included two mathematical topics. First, the recently standardized prefixes for naming certain powers of two, versus certain powers of ten, for describing computer storage were introduced. We then discussed how computers typically represent signed and unsigned integers, in anticipation of a continuing need for that understanding.
At the assembly language level, each instruction specifies one fundamental operation to be performed by the CPU. Instructions can be classified into six basic categories: 1. Data movement instructions move data from one location in memory to another, between memory and registers, among registers, or between memory and I/O devices. 2. Arithmetic instructions perform various mathematical operations, such as the addition of one quantity to another. 3. Logical instructions perform Boolean operations, such as AND, OR, and EXCLUSIVE OR.
Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles by James S. Evans
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