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;; GCC assembler includefile for AS1750
;;
;; Macros defined:
;; EFLR.M #d,#s Load the three regs starting at R#s to R#d following.
;; RET.M #fs Return from function (uses the framesize #fs)
UC SET 15
; Return from function ; parameter: framesize
MACRO RET.M
IF `1` > 0
IF `1` <= 16
AISP R14,`1`
ELSE
AIM R14,`1`
ENDIF
ENDIF
LR R15,R14
URS R15
ENDMACRO
; Useful instructions missing from the 1750A standard:
; Extended Float Load from Registers
MACRO EFLR.M ; args : #1=dest-regno, #2=source-regno
ONE SET `1` + 2
TWO SET `2` + 2
IF `1` >= `2` || `1`+2 < `2`
LR R`ONE`,R`TWO`
DLR R`1`,R`2`
ELSE
DLR R`1`,R`2`
LR R`ONE`,R`TWO`
DLR R`1`,R`1` ; Just to update condition codes
ENDIF
ENDMACRO
; The following leave the condition codes haywire. But that is
; accounted for (see notice_update_cc in config/1750a.c.)
; Double ANd Register with Register
MACRO DANR.M
ONE SET `1` + 1
TWO SET `2` + 1
ANDR R`1`,R`2`
ANDR R`ONE`,R`TWO`
ENDMACRO
; Double OR Register with Register
MACRO DORR.M
ONE SET `1` + 1
TWO SET `2` + 1
ORR R`1`,R`2`
ORR R`ONE`,R`TWO`
ENDMACRO
; Double eXoR Register with Register
MACRO DXRR.M
ONE SET `1` + 1
TWO SET `2` + 1
XORR R`1`,R`2`
XORR R`ONE`,R`TWO`
ENDMACRO
; Double Nand Register with register
MACRO DNR.M
ONE SET `1` + 1
TWO SET `2` + 1
NR R`1`,R`2`
NR R`ONE`,R`TWO`
ENDMACRO
; Unsigned Compare Immediate
MACRO UCIM.M
LAST SET `1` + 3
PSHM R`1`,R`LAST`
LO SET `1` + 1
LR R`LO`,R`1`
XORR R`1`,R`1`
HI SET `1` + 2
XORR R`HI`,R`HI`
LIM R`LAST`,`2`
DCR R`1`,R`HI`
POPM R`1`,R`LAST`
ENDMACRO
; Unsigned Compare Register with register
MACRO UCR.M
PSHM R10,R13 ; R12 and R13 are assumed not to be input parameters
LR R13,R`2`
LR R11,R`1`
XORR R12,R12
XORR R10,R10
DCR R10,R12
POPM R10,R13
ENDMACRO
; Unsigned Compare register with memory
MACRO UC.M
PSHM R10,R13
L R13,`2`
LR R11,R`1`
XORR R12,R12
XORR R10,R10
DCR R10,R12
POPM R10,R13
ENDMACRO
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