Position-Independent Code

Generating Position-Independent Code

NOP

 

 

LDW

-24(%sp),%rp

; restore the original rp

LDSID

(%rp),%r1

 

MTSP

%r1,%sr0

 

BE,N

0(%sr0,%rp) ; inter-space return

For More Information:

The remainder of this section describes how compilers generate PIC for the following addressing situations:

•“PIC Requirements for Compilers and Assembly Code”

•“Long Calls”

•“Long Branches and Switch Tables”

•“Assigned GOTO Statements”

•“Literal References”

•“Global and Static Variable References”

•“Procedure Labels”

You can use these guidelines to write assembly language programs that generate PIC object code. For details on assembly language, refer to the Assembler Reference Manual and PA-RISC 2.0 Architecture.

PIC Requirements for Compilers and Assembly Code

The linkage table pointer register, %r19, must be stored at %sp−32 by all PIC routines. This can be done once on procedure entry. %r19 must also be restored on return from a procedure call. The value should have been stored in %sp−32 (and possibly in a callee-saves register). If the PIC routine makes several procedure calls, the routine should copy %r19 into a callee-saves register as well, to avoid a memory reference when restoring %r19 upon return from each procedure call. Just like %r27 (%dp), the compilers treat %r19 as a reserved register whenever PIC mode is in effect.

In general, references to code are handled by the linker, and the compilers act differently only in the few cases where they would have generated long calls or long branches. References to data, however, need a new fixup request to identify indirect references through the linkage table, and the code generated will change slightly.

264

Chapter 7

Page 263 Page 265
Page 264
Image 264
Kenwood HP 9000 manual For More Information, PIC Requirements for Compilers and Assembly Code, 264
Page 263 Page 265

HP 9000 specifications

The Kenwood HP 9000 is a cutting-edge home appliance designed for culinary enthusiasts seeking to elevate their cooking experience. This powerful kitchen machine stands out for its multi-functionality, combining the roles of a food processor, blender, and mixer into one sleek unit.

One of the flagship features of the Kenwood HP 9000 is its robust motor, which delivers exceptional performance across various tasks. With a powerful motor that operates at multiple speeds, users can tackle everything from kneading dough to finely chopping vegetables with ease. The variable speed control allows for precision, ensuring that every ingredient is processed to perfection according to individual preferences.

The HP 9000 comes equipped with a variety of attachments that enhance its versatility. Among these are a stainless-steel mixing bowl, a dough hook, a whisk, and multiple cutting blades. This extensive array of accessories means that users can whip up delightful pastries, create homemade pasta, or prepare smoothies with minimal hassle. Each attachment is designed for easy attachment and removal, making the transition between tasks seamless and efficient.

Another key characteristic of the Kenwood HP 9000 is its advanced safety features. The design incorporates mechanisms that prevent the machine from operating unless all components are securely in place. This not only gives users peace of mind while cooking but also ensures longevity for the appliance, reducing the risk of wear and tear over time.

In terms of design, the HP 9000 is both modern and aesthetically pleasing. Its ergonomic shape and compact size make it easy to store and use in various kitchen settings, while the high-quality materials used in its construction guarantee durability and longevity. The user interface is intuitive, with clearly labeled buttons that facilitate operation, ensuring that even novice cooks can navigate the machine effortlessly.

Additionally, the Kenwood HP 9000 features innovative technologies, such as an integrated digital timer and a pulse function for added control during food preparation. These features enhance cooking precision, allowing users to achieve consistent results every time.

In summary, the Kenwood HP 9000 is an exceptional kitchen appliance that combines power, versatility, and safety. With its advanced features and user-friendly design, it is an ideal choice for anyone looking to simplify their cooking process while achieving professional-level results. Whether you're whipping up a quick meal or tackling an elaborate recipe, the HP 9000 is a reliable companion that will inspire culinary creativity.
Top Page Image Contents