doc vx_wspawn

Author: buggy213

docs/isa.md

@@ -253,7 +253,7 @@ vx_spawn rs1, rs2
 ```
 
 Activates warps 1 up to the value of `rs1` in the "leader" lane, if not already active. Has no effect on warp 0.
-Also sets `PC` of newly active warps to the value of `rs2` in the "leader" lane. 
+Sets `PC` of newly active warps to the value of `rs2` in the "leader" lane. Sets tmask of newly active warps to all 1's.  
 
 Note: this will eventually be superceded by command processor + neutrino