Instructions assembleur XTENSA par fonctions

publication: 9 octobre 2023 / mis à jour 9 octobre 2023

Load instructions

L8UI,   \ 8-bit unsigned load (8-bit offset) 
L16SI,  \ 16-bit signed load (8-bit shifted offset) 
L16UI,  \ 16-bit unsigned load (8-bit shifted offset) 
L32I,   \ 32-bit load (8-bit shifted offset) 
L32R,   \ 32-bit load PC-relative (16-bit negative word offset)

Only the loads L32I, L32I.N, and L32R, can access InstRAM and InstROM locations.

Store instructions

S8I,    \ 8-bit store (8-bit offset) 
S16I,   \ 16-bit store (8-bit shifted offset) 
S32I,   \ 32-bit store (8-bit shifted offset)

Memory Access Ordering

MEMW,   \ Order memory accesses before with memory access after 
EXTW,   \ Order all external effects before with all external effects after

Jump and Call Instructions

CALL0,   \ CALL Call subroutine, PC-relative 
CALLX0,  \ CALLX Call subroutine, address in register  
J,       \ CALL Unconditional jump, PC-relative 
JX,      \ CALLX Unconditional jump, address in register 
RET,     \ CALLX Subroutine return—jump to return address.  
         \ Used to return from a routine called by CALL0/CALLX0

Conditional Branch Instructions

BEQZ,   \ Branch if equal to zero 
BNEZ,   \ Branch if not equal to zero 
BGEZ,   \ Branch if greater than or equal to zero 
BLTZ,   \ Branch if less than zero 
BEQI,   \ Branch if equal immediate 
BNEI,   \ Branch if not equal immediate 
BGEI,   \ Branch if greater than or equal immediate 
BLTI,   \ Branch if less than immediate 
BGEUI,  \ Branch if greater than or equal unsigned immediate 
BLTUI,  \ Branch if less than unsigned immediate2 
BBCI,   \ Branch if bit clear immediate 
BBSI,   \ Branch if bit set immediate 
BEQ,    \ Branch if equal 
BNE,    \ Branch if not equal 
BGE,    \ Branch if greater than or equal 
BLT,    \ Branch if less than 
BGEU,   \ Branch if greater than or equal unsigned 
BLTU,   \ Branch if less than Unsigned 
BANY,   \ Branch if any of masked bits set 
BNONE,  \ Branch if none of masked bits set (All Clear) 
BALL,   \ Branch if all of masked bits set 
BNALL,  \ Branch if not all of masked bits set 
BBC,    \ Branch if bit clear 
BBS,    \ Branch if bit set

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