Hi
ASIC is application specific integraed circuit and u need to design tings there.The way u design the things will be imlemented.There are no inbuilt things as in an FPGA.u have dedicated multipliers.
However all ASIC synthesis tools do have a library in which all multiplier types are present and you need to give directives to get a particular type of arithmetic unit.
ex
module mul(a,b,c);
input a;
input b;
output c;
assign c=a*b;
//ur directives go here like directive ="booth"
//i am not sure of the exact directive format
//u need to have designware foundation libraries.
//this is for synopsys DC
endmodle
This is a simple code.
---will there be enough multipliers in asic or not?
U can implement howmuch ever u want.Not like FPGA limited resources