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1.1 root 1: ;; GCC assembler includefile for AS1750
2: ;;
3: ;; Macros defined:
4: ;; EFLR.M #d,#s Load the three regs starting at R#s to R#d following.
5: ;; RET.M #fs Return from function (uses the framesize #fs)
6:
7:
8: UC SET 15
9:
10: ; Return from function ; parameter: framesize
11: MACRO RET.M
12: IF `1` > 0
13: IF `1` <= 16
14: AISP R14,`1`
15: ELSE
16: AIM R14,`1`
17: ENDIF
18: ENDIF
19: LR R15,R14
20: URS R15
21: ENDMACRO
22:
23: ; Useful instructions missing from the 1750A standard:
24:
25: ; Extended Float Load from Registers
26: MACRO EFLR.M ; args : #1=dest-regno, #2=source-regno
27: ONE SET `1` + 2
28: TWO SET `2` + 2
29: IF `1` >= `2` || `1`+2 < `2`
30: LR R`ONE`,R`TWO`
31: DLR R`1`,R`2`
32: ELSE
33: DLR R`1`,R`2`
34: LR R`ONE`,R`TWO`
35: DLR R`1`,R`1` ; Just to update condition codes
36: ENDIF
37: ENDMACRO
38:
39: ; The following leave the condition codes haywire. But that is
40: ; accounted for (see notice_update_cc in config/1750a.c.)
41:
42: ; Double ANd Register with Register
43: MACRO DANR.M
44: ONE SET `1` + 1
45: TWO SET `2` + 1
46: ANDR R`1`,R`2`
47: ANDR R`ONE`,R`TWO`
48: ENDMACRO
49:
50: ; Double OR Register with Register
51: MACRO DORR.M
52: ONE SET `1` + 1
53: TWO SET `2` + 1
54: ORR R`1`,R`2`
55: ORR R`ONE`,R`TWO`
56: ENDMACRO
57:
58: ; Double eXoR Register with Register
59: MACRO DXRR.M
60: ONE SET `1` + 1
61: TWO SET `2` + 1
62: XORR R`1`,R`2`
63: XORR R`ONE`,R`TWO`
64: ENDMACRO
65:
66: ; Double Nand Register with register
67: MACRO DNR.M
68: ONE SET `1` + 1
69: TWO SET `2` + 1
70: NR R`1`,R`2`
71: NR R`ONE`,R`TWO`
72: ENDMACRO
73:
1.1.1.2 ! root 74: ; Unsigned Compare Immediate
! 75:
! 76: MACRO UCIM.M
! 77: LAST SET `1` + 3
! 78: PSHM R`1`,R`LAST`
! 79: LO SET `1` + 1
! 80: LR R`LO`,R`1`
! 81: XORR R`1`,R`1`
! 82: HI SET `1` + 2
! 83: XORR R`HI`,R`HI`
! 84: LIM R`LAST`,`2`
! 85: DCR R`1`,R`HI`
! 86: POPM R`1`,R`LAST`
! 87: ENDMACRO
! 88:
! 89:
! 90: ; Unsigned Compare Register with register
! 91:
! 92: MACRO UCR.M
! 93: PSHM R10,R13 ; R12 and R13 are assumed not to be input parameters
! 94: LR R13,R`2`
! 95: LR R11,R`1`
! 96: XORR R12,R12
! 97: XORR R10,R10
! 98: DCR R10,R12
! 99: POPM R10,R13
! 100: ENDMACRO
! 101:
! 102:
! 103: ; Unsigned Compare register with memory
! 104:
! 105: MACRO UC.M
! 106: PSHM R10,R13
! 107: L R13,`2`
! 108: LR R11,R`1`
! 109: XORR R12,R12
! 110: XORR R10,R10
! 111: DCR R10,R12
! 112: POPM R10,R13
! 113: ENDMACRO
! 114:
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