mirror of
https://github.com/elliotnunn/powermac-rom.git
synced 2024-06-04 05:29:32 +00:00
71 lines
1.8 KiB
ArmAsm
71 lines
1.8 KiB
ArmAsm
MACRO
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_bitequate &bitnum, &name ; _bitequate 16, MyLabel => MyLabel=0x00008000, bMyLabel=16
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&name equ 1 << (31-&bitnum)
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b&name equ &bitnum
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ENDM
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########################################################################
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MACRO
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_align &arg ; Macro necessary because PPCAsm versions vary
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my_align set 1 << (&arg)
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my_mask set my_align - 1
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my_offset set * - CodeBase
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my_pad set (my_align - (my_offset & my_mask)) & my_mask
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IF my_pad
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dcb.l my_pad>>2, 0x48000004
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ENDIF
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ENDM
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########################################################################
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MACRO
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lisori ®, &val ; NK's preferred way to load 32-bit immediate
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lis ®, ((&val) >> 16) & 0xffff
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ori ®, ®, (&val) & 0xffff
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ENDM
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########################################################################
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MACRO
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_kaddr &rd, &rs, &label ; Get address of label given CodeBase reg
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addi &rd, &rs, (&label-CodeBase)
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ENDM
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########################################################################
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MACRO
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_ori &rd, &rs, &imm
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IF (&imm) & 0xFFFF0000 THEN
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oris&dot &rd, &rs, ((&imm) >> 16) & 0xFFFF ; beware sign ext!
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ELSE
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ori&dot &rd, &rs, &imm
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ENDIF
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ENDM
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########################################################################
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MACRO
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_mvbit &rd, &bd, &rs, &bs
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rlwimi &rd, &rs, (32 + &bs - &bd) % 32, &bd, &bd
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ENDM
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########################################################################
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MACRO
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_mvbit0 &rd, &bd, &rs, &bs
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rlwinm &rd, &rs, (32 + &bs - &bd) % 32, &bd, &bd
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ENDM
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########################################################################
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MACRO
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_clrNCBCache &scr==r0
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li &scr, -1
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stw &scr, KDP.NCBCacheLA0(r1)
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stw &scr, KDP.NCBCacheLA1(r1)
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stw &scr, KDP.NCBCacheLA2(r1)
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stw &scr, KDP.NCBCacheLA3(r1)
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ENDM
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