On Mon, Apr 25, 2011 at 07:01:49PM +0200, Sven Arvidsson wrote: > On Fri, 2011-04-22 at 22:02 -0700, Tom Stellard wrote: > > R500 cards do support 1024 fragment shader instructions (512 ALU + 512 > > TEX), so I > > think the value of GL_MAX_PROGRAM_NATIVE_INSTRUCTIONS_ARB should be 1024.
I was wrong about this. Only r400 can do 512 ALU + 512 TEX. R500 is limited to 512 total instructions. > > I noticed that some OEMs marketed the card as having "1024 shader > instructions", but perhaps that's just confusion from the fact that it > does have 1024 VS instructions. > I'm just guessing, but since each instruction is capable of doing one vec3 and one scalar operation maybe they are counting 512 vec3 + 512 scalar = 1024 total instructions. The R500 Acceleration Document[1] counts instructions this way. -Tom [1] http://www.x.org/docs/AMD/R5xx_Acceleration_v1.5.pdf pg. 7 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
