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From: David Williams <davidwilliams@ozemail.com.au> Date: Sun, 3 Oct 1999 11:16:17 +1000 A while ago I got some help to implement some atomic operation using constraints within inline assembler. I now need to do a similar thing but it got complicated. After some trial and error I got the following bit of code to produce the desired assembler - but it seems quite messy. My question is there a better way to produce the same result? asm(" move.L %0,%%d0" : : "m" (InpMasks[digChan]) : "%%d0"); asm(" OR.L %%d0,%0" : "m=" (EZ328_IMR) : : "%%d0"); Note: InpMasks[digChan] references a 32 bit value from an array of 32 bit values. EZ328_IMR is memory address of 32 bit hardware register (interrupt mask register in this case). You should be able to do something along the lines of asm ("or.l %1,%0" : "=m" (EZ328_IMR) : "d" (InpMasks[digChan])) When gcc sees the `d' constraint on the input operand, it will load the value into a data register. Ian ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com
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