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21264/EV68A Hardware Reference Manual
Alpha Instruction Set A–7
Alpha Instruction Summary
PKWB Opr 1C.36 Pack words to bytes
RC Mfc 18.E000 Read and clear
RET Mbr 1A.2 Return from subroutine
RPCC Mfc 18.C000 Read process cycle counter
RS Mfc 18.F000 Read and set
S4ADDL Opr 10.02 Scaled add longword by 4
S4ADDQ Opr 10.22 Scaled add quadword by 4
S4SUBL Opr 10.0B Scaled subtract longword by 4
S4SUBQ Opr 10.2B Scaled subtract quadword by 4
S8ADDL Opr 10.12 Scaled add longword by 8
S8ADDQ Opr 10.32 Scaled add quadword by 8
S8SUBL Opr 10.1B Scaled subtract longword by 8
S8SUBQ Opr 10.3B Scaled subtract quadword by 8
SEXTB Opr 1C.00 Sign extend byte
SEXTW Opr 1C.01 Sign extend word
SLL Opr 12.39 Shift left logical
SQRTF F-P 14.08A Square root F_floating
SQRTG F-P 14.0AA Square root G_floating
SQRTS F-P 14.08B Square root S_floating
SQRTT F-P 14.0AB Square root T_floating
SRA Opr 12.3C Shift right arithmetic
SRL Opr 12.34 Shift right logical
STB Mem 0E Store byte
STF Mem 24 Store F_floating
STG Mem 25 Store G_floating
STL Mem 2C Store longword
STL_C Mem 2E Store longword conditional
STQ Mem 2D Store quadword
STQ_C Mem 2F Store quadword conditional
STQ_U Mem 0F Store unaligned quadword
STS Mem 26 Store S_floating
STT Mem 27 Store T_floating
Table A–2 Architecture Instructions (Continued)
Mnemonic Format Opcode Description