Lets put some things straight,
AMD Q1 CPU market share
AMD Q2 CPU market share
In Q1 2011
AMD had ~35 25,8% of the Desktop Market (units shipped) with an ASP(Average Selling Price) of $54,16
AMD's Desktop Total Revenue in K$s $598,497
Intel's Desktop Total Revenue in K$s $2,872,036
In Q2 2011
AMD had ~37 26,9% of the Desktop Market (units shipped) with an ASP(Average Selling Price) of $51,14
AMD's Desktop Total Revenue in K$s $574,381
Intel's Desktop Total Revenue in K$s $2,717,361
I believe they doing ok in Desktop, they are just not competitive in the Performance Desktop market where high ASP makes more profits.
Their APUs (Llano and Bobcat) seams to be doing great and we already know they will release Trinity in Q1 2012.
Server Market
We can all see that Server market has the Highest ASP and that translates to higher profits. Intel makes more revenue in the Server market alone than AMD does in all three markets combined.
In Q1 2011
AMD had ~7,3 6,8% of the Server Market (units shipped) with an ASP(Average Selling Price) of $379.03
AMD's Server Total Revenue in K$s $109,161
Intel's Server Total Revenue in K$s $2,194,026
In Q2 2011
AMD had ~6,23 5,9% of the Server Market (units shipped) with an ASP(Average Selling Price) of $336.94
AMD's Server Total Revenue in K$s $82,214
Intel's Server Total Revenue in K$s $2,235,818
Mobile Market
The biggest market is the Mobile, especially for Intel the Mobile market revenue is almost the same as the combined of Server and Desktop.
In Q1 2011
AMD had ~15,22 13,2% of the Mobile Market (units shipped) with an ASP(Average Selling Price) of $36.98
AMD's Mobile Total Revenue in K$s $259,688
Intel's Mobile Total Revenue in K$s $4,152,149
In Q2 2011
AMD had ~17,25 14,7% of the Mobile Market (units shipped) with an ASP(Average Selling Price) of $40.06
AMD's Mobile Total Revenue in K$s $309,467
Intel's Mobile Total Revenue in K$s $4,341,669
AMD has
33-40 25-30% of Desktop market share and i believe they will try to keep this margins but they will try to raise ASP and profits if possible. AMD simple doesnt need to try catch Intel in Desktop High End.
Mobile is the biggest x86 market both in units shipped and in revenue. Server market has the highest ASP and the highest profits. In both of this two markets AMD lags behind by substantial margins against Intel.
It seams that Bobcat and Llano has raised both market share and revenue in the Mobile market and it is only logical for AMD to really focus more in this segment than Desktop. Fusion will be their weapon and they have to continue releasing a new product every year with better availability. Mobile market is shifting to lower power laptops and Tablets and Bobcat architecture with ATIs iGPU can give them an advantage in performance per Watt.
Server has the highest ASPs and thats where higher profits are. I believe Bulldozer architecture will give them an advantage in selected areas. They are targeting specific workloads with bulldozer like Cloud, Virtualization etc.
It seams AMD will not try to compete directly with Intel and they will focus in areas where they will be able to catch a bigger market share. That doesnt mean they will exit the Desktop market in favor of ARM.
Edit: Correction of Market Share percentages (units shipped)