DSP main page,
DSP System calls.
DMA System calls.
DSP Host Communication Example.
DMA Handshaked Communication Example.
The macr instruction multiplies the signed 24-bits value in the x0 register by the signed 24-bits value in the y0 register, adds the resulting product to the 56-bit B accumulator and then rounds the result into the B1 portion of the accumulator. In parallel, the old value in B1 is stored in the in 24-bits x1 register and a 24-bits value is fetched from the Y data space with the address in the 16-bits r4 register and stored in the 24-bits y1 register. The r4 register is postincremented by the value in the 16-bits n4 register.macr x0,y0,B B,x1 Y:(r4)+n4,y1