Special Registers Altered:
None
-
-# [DRAFT] Twin Multiply and Subtract Doubleword
-
-* msubed RT,RA,RB,RC
-
-Pseudocode:
-
- <!-- SVP64: RA,RB,RC,RT have EXTRA2, RS as below -->
- <!-- bit 8 of EXTRA is clear: RS.[s|v]=RT.[s|v]+VL -->
- <!-- bit 8 of EXTRA is set : RS.[s|v]=RC.[s|v] -->
- prod[0:127] <- (RA) * (RB)
- sub[0:127] <- EXTZ(RC) - prod
- RT <- sub[64:127]
- RS <- sub[0:63]
-
-Special Registers Altered:
-
- None