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One
and One Memory Access Instruction in Parallel
Ireg
/* Add on Sign while incrementing an Ireg and loading a data reg-
ister based on the previous value of the Ireg. */
r7.h=r7.l=sign(r2.h)*r3.h + sign(r2.l)*r3.l || i0+=m3 ||
r0=[i0] ;
/* Add/subtract two vector values while incrementing an Ireg and
loading a data register. */
R2 = R2 +|+ R4, R4 = R2 -|- R4 (ASR) || I0 += M0 (BREV) || R1 =
[I0] ;
/* Multiply and accumulate to Accumulator while loading a data
register and storing a data register using an Ireg pointer. */
A1=R2.L*R1.L, A0=R2.H*R1.H || R2.H=W[I2++] || [I3++]=R3 ;
/* Multiply and accumulate while loading two data registers. One
load uses an Ireg pointer. */
A1+=R0.L*R2.H,A0+=R0.L*R2.L || R2.L=W[I2++] || R0=[I1--] ;
R3.H=(A1+=R0.L*R1.H), R3.L=(A0+=R0.L*R1.L) || R0=[P0++] ||
R1=[I0] ;
/* Pack two vector values while storing a data register using an
Ireg pointer and loading another data register. */
R1=PACK(R1.H,R0.H) || [I0++]=R0 || R2.L=W[I2++] ;
One
Instruction in Parallel
Ireg
/* Multiply-Accumulate to a Data register while incrementing an
Ireg. */
r6=(a0+=r3.h*r2.h)(fu) || i2-=m0 ;
/* which the assembler expands into:
r6=(a0+=r3.h*r2.h)(fu) || i2-=m0 || nop ; */
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
Issuing Parallel Instructions
20-9
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