MSP430 CMP operator

Posted by Ludicrous on Stack Overflow See other posts from Stack Overflow or by Ludicrous
Published on 2014-08-20T17:41:51Z Indexed on 2014/08/20 22:20 UTC
Read the original article Hit count: 326

Filed under:

assembly

|

msp430

Let's say I have the MSP430 assembly segment below:

r15:

439c

Memory map:

4390:   6045 0200 9c43 6400 8844 5044 363a 0000

Code:

448a:  cmp  #0x363a, 0x0(r15)
4490:  jnz  $+0x1c
4492:  Code continues
.
.
.
44ac: Jump to location

The goal is to have the Z flag high. To do this with a cmp, both src and dst must be equal. If I have 363a in the memory location of r15, why is it that the resulting cmp does not trigger the Z flag?

Through experimentation, I found that putting 3a36 in the memory location of r15 did in fact trigger the Z flag, but I don't understand why.

If anyone could bring this to light, I would greatly appreciate it.

If more information is needed, I will gladly provide it.

© Stack Overflow or respective owner

Related posts about assembly

More information wanted on error: CREATE ASSEMBLY for assembly failed because assembly failed verif

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a small application that uses SQL Server 2005 Express with CLR stored procedures. It has been successfully installed and runs on many computers running XP and Vista. To create the assembly the following SQL is executed (names changed to protect the innocent): CREATE ASSEMBLY myAssemblyName… >>> More
Installed SQL Server 2008 and now TFS is broken.

as seen on Server Fault - Search for 'Server Fault'
Hi, My W2K3 server was running TFS 2008 SP1, SQL Server 2005 Development edition. I installed SQL Server 2008 Standard. I installed it while leaving SQL Server 2005 alone. Upgrading was not possible due to the differences in editions of the SQL Servers. Now TFS is broken. On a client computer… >>> More
How to Specify AssemblyKeyFile Attribute in .NET Assembly and Issues

as seen on Microsoft .NET Support Team - Search for 'Microsoft .NET Support Team'
How to specify strong key file in assembly? Answer: You can specify snk file information using following line [assembly: AssemblyKeyFile(@"c:\Key2.snk")] Where to specify an strong key file (snk file)? Answer: You have two options to specify the AssemblyKeyFile infromation. 1. In… >>> More
Assembly Language Question: Display Characters to screen LIFO (Last In First Out) in assembly langua

as seen on Stack Overflow - Search for 'Stack Overflow'
Given a stack that displays characters to the screen First in First Out(FIFO), how do you switch it to display them Last in First Out(LIFO). Theoretically speaking... is it simply just sending the characters to print in reverse order? >>> More
c# - can you make a "weak" assembly reference to a strong named assembly

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, for various reasons i would rather not use strong named (signed) assemblies in my project. however, one of the projects is referenced by a sharepoint web part which means it must be signed. is it possible to have this assembly signed but when I reference it from other projects, to do so using… >>> More

Related posts about msp430

Support for MSP430x5xx processors on MSP430-gcc

as seen on Stack Overflow - Search for 'Stack Overflow'
How would I add support for a new MSP430 processor type on MSP430-gcc? E.g. msp430x5xx series. I understand I must produce the relevant .h / .o files but how do I integrate those in msp430-gcc ? >>> More
IAR MSP430 compiler internal error while compiling

as seen on Stack Overflow - Search for 'Stack Overflow'
IAR C/C++ Compiler for MSP430 5.10.1 [Evaluation] (5.10.1.20144) I get an illegal state internal error when attempting to compile the FreeRTOS 5.4 Task.c file (everything else compiles fine) Internal Error: [CoreUtil/General]: Illegal state The kick start version of IAR (MSP430 version) works… >>> More
TI MSP430 Interrupt source

as seen on Stack Overflow - Search for 'Stack Overflow'
Guys, I know that when working with the MSP430F2619 and TI's CCSv4, I can get more than one interrupt to use the same interrupt handler with code that looks something like this: #pragma vector=TIMERA1_VECTOR #pragma vector=TIMERA0_VECTOR __interrupt void Timer_A (void){ ServiceWatchdogTimer(); } My… >>> More
Timer a usage in msp430 in high compiler optimization mode

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have used timer A in MSP430 with high compiler optimization, but found that my timer code is failing when high compiler optimization used. When none optimization is used code works fine. This code is used to achieve 1 ms timer tick. timeOutCNT is increamented in interrupt. Following is the… >>> More
IAR Embedded Workbench MSP430 and *.lib files linking

as seen on Stack Overflow - Search for 'Stack Overflow'
I was assuming that it was a really simple task but I did not find anything relevant or my mistake. So putting my problem here i.e. I have some project for MSP430 which is actually in code composer studio. I have to run this whole code into IAR embedded workbench now. There are some library files(*… >>> More