diff options
Diffstat (limited to 'cpu/or1korbis.cpu')
| -rw-r--r-- | cpu/or1korbis.cpu | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/cpu/or1korbis.cpu b/cpu/or1korbis.cpu index 535bd28..6fbf40a 100644 --- a/cpu/or1korbis.cpu +++ b/cpu/or1korbis.cpu @@ -74,10 +74,25 @@ 25 26 INT - ((value pc) (sra SI (sub IAI value pc) (const 2))) + ((value pc) (sra IAI (sub IAI value pc) (const 2))) ((value pc) (add IAI (sll IAI value (const 2)) pc)) ) +; PC relative, 21-bit, 13 shifted to right, aligned. +; Note that the alignment means that we can't simplify relocations in the +; same way as we do for pc-relative, so we use ABS-ADDR instead of PCREL-ADDR. +(df f-disp21 + "disp21" + ((MACH ORBIS-MACHS) ABS-ADDR) + 20 + 21 + INT + ((value pc) + (sub IAI (sra IAI value (const 13)) (sra IAI pc (const 13)))) + ((value pc) + (sll IAI (add IAI value (sra IAI pc (const 13))) (const 13))) + ) + ; Immediates. (dnf f-uimm16 "uimm16" ((MACH ORBIS-MACHS)) 15 16) (df f-simm16 "simm16" ((MACH ORBIS-MACHS) SIGN-OPT) 15 16 INT #f #f) @@ -134,6 +149,7 @@ insn-opcode "insn main opcode enums" ((MACH ORBIS-MACHS)) OPC_ f-opcode (("J" #x00) ("JAL" #x01) + ("ADRP" #x02) ("BNF" #x03) ("BF" #x04) ("NOP" #x05) @@ -312,6 +328,15 @@ ) (define-operand + (name disp21) + (comment "pc-rel 21 bit") + (attrs (MACH ORBIS-MACHS)) + (type h-iaddr) + (index f-disp21) + (handlers (parse "disp21")) + ) + +(define-operand (name simm16) (comment "16-bit signed immediate") (attrs (MACH ORBIS-MACHS) SIGN-OPT) @@ -403,6 +428,14 @@ ) ) +(dni l-adrp "adrp reg/disp21" + ((MACH ORBIS-MACHS)) + "l.adrp $rD,${disp21}" + (+ OPC_ADRP rD disp21) + (set UWI rD disp21) + () + ) + (define-cti l-jal "jump and link (pc-relative iaddr)" |