Power ISA™ Version 2.03 - Power.org

Version 2.03
Vector Multiply Halfwords, Odd, Signed,
Modulo, Fractional and Accumulate into
Words
EVX-form
evmhosmfaaw RT,RA,RB
4 RT RA RB 1295
0 6 11 16 21 31
Vector Multiply Halfwords, Odd, Signed,
Modulo, Fractional and Accumulate
Negative into Words
EVX-form
evmhosmfanw RT,RA,RB
4 RT RA RB 1423
0 6 11 16 21 31
temp 0:31 (RA) 16:31 × sf (RB) 16:31
RT 0:31 (ACC) 0:31 + temp 0:31
temp 0:31 (RA) 48:63 × sf (RB) 48:63
RT 32:63 (ACC) 32:63 + temp 0:31
ACC 0:63 (RT) 0:63
For each word element in the accumulator, the corresponding
odd-numbered halfword signed fractional elements
in RA and RB are multiplied. The 32 bits of each
intermediate product are added to the contents of the
corresponding accumulator word and the results are
placed into the corresponding RT words and into the
accumulator.
Special Registers Altered:
ACC
temp 0:31 (RA) 16:31 × sf (RB) 16:31
RT 0:31 (ACC) 0:31 - temp 0:31
temp 0:31 (RA) 48:63 × sf (RB) 48:63
RT 32:63 (ACC) 32:63 - temp 0:31
ACC 0:63 (RT) 0:63
For each word element in the accumulator, the corresponding
odd-numbered halfword signed fractional elements
in RA and RB are multiplied. The 32 bits of each
intermediate product are subtracted from the contents
of the corresponding accumulator word and the results
are placed into the corresponding RT words and into
the accumulator.
Special Registers Altered:
ACC
Vector Multiply Halfwords, Odd, Signed,
Modulo, Integer
EVX-form
Vector Multiply Halfwords, Odd, Signed,
Modulo, Integer to AccumulatorEVX-form
evmhosmi
RT,RA,RB
evmhosmia RT,RA,RB
4 RT RA RB 1037
0 6 11 16 21 31
4 RT RA RB 1069
0 6 11 16 21 31
RT 0:31 (RA) 16:31 × si (RB) 16:31
RT 32:63 (RA) 48:63 × si (RB) 48:63
The corresponding odd-numbered halfword
signed-integer elements in RA and RB are multiplied.
The two 32-bit products are placed into the corresponding
words of RT.
Special Registers Altered:
None
RT 0:31 (RA) 16:31 × si (RB) 16:31
RT 32:63 (RA) 48:63 × si (RB) 48:63
ACC 0:63 (RT) 0:63
The corresponding odd-numbered halfword
signed-integer elements in RA and RB are multiplied.
The two 32-bit products are placed into the corresponding
words of RT and into the accumulator.
Special Registers Altered:
ACC
Chapter 6. Signal Processing Engine (SPE)
225