356 lines
8.8 KiB
NASM
356 lines
8.8 KiB
NASM
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;
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;
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; Copyright (C) Microsoft Corporation, 1986
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;
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; This Module contains Proprietary Information of Microsoft
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; Corporation and should be treated as Confidential.
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;
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subttl emdisp.asm - Dispatch Tables
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page
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;*********************************************************************;
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; ;
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; Dispatch Tables ;
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; ;
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;*********************************************************************;
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; dispatch tables
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; These tables are based upon the layout of the 8087 instructions
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;
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; 8087 instruction fields: |escape|MF|Arith|MOD|Op|r/m|disp1|disp2|
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; field length in bits: 5 2 1 2 3 3 8 8
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;
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; Disp1 and Disp2 are optional address bytes present only if MOD <> 11.
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; When (MOD <> 11) r/m describes which regs (SI,DI,BX,BP) are added to
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; Disp1 and Disp2 to calculate the effective address. This form
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; (memory format) is used for Loads, Stores, Compares, and Arithmetic
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; When using memory format MF determines the Type of the Memory operand
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; i.e. Single Real, Double real, Single Integer, or Double Integer
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; Arith is 0 for Arithmetic opetations (and compares), set to 1 otherwise
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; Op mostly determines which type of operation to do though when not in
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; memory format some of that is coded into MF and r/m
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; All of the tables are set up to do a jump based upon one or more of the
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; above fields. The outline for decoding instructions is:
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;
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; IF (memory format) THEN
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; Assemble Effective Address (using MOD and r/m and EffectiveAddressTab)
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; IF (Arith) THEN
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; Load to the stack (using MF and FLDsdriTab)
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; Do the Arithmetic Operation (using Op and ArithmeticOpTab)
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; ELSE (memory format non- arithmetic)
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; Do the operation (using Op and NonArithOpMemTab and
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; depending on the case MF and one of the FLD or FST Tabs)
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; ENDIF
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; ELSE (Register format)
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; IF (Arith) THEN
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; Test r/m for legit Stack reference
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; Do the Arithmetic Operation (using Op and ArithmeticOpTab)
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; ELSE (non-arithmetic register format)
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; Do the operation (using Op and NonArithOpRegTab and
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; depending on the case r/m and one of:
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; Constants, Miscellaneous, Transcendental, or Various Tabs)
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EVEN
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glb <EA286Tab>
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eWORD EA286Tab ; Uses |r/m|MOD| for indexing
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edw BXSI0D
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edw BXSI1D
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edw BXSI2D
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edw NoEffectiveAddress
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edw BXDI0D
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edw BXDI1D
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edw BXDI2D
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edw NoEffectiveAddress
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edw BPSI0D
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edw BPSI1D
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edw BPSI2D
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edw NoEffectiveAddress
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edw BPDI0D
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edw BPDI1D
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edw BPDI2D
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edw NoEffectiveAddress
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edw DSSI0D
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edw DSSI1D
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edw DSSI2D
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edw NoEffectiveAddress
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edw DSDI0D
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edw DSDI1D
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edw DSDI2D
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edw NoEffectiveAddress
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edw DSXI2D
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edw BPXI1D
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edw BPXI2D
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edw NoEffectiveAddress
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edw BXXI0D
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edw BXXI1D
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edw BXXI2D
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edw NoEffectiveAddress
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ifdef i386
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glb <EA386Tab>
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eWORD EA386Tab ; Uses |r/m|MOD| for indexing
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edw Exx00 ; eax
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw Exx00 ; ecx
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw Exx00 ; edx
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw Exx00 ; ebx
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw SIB00 ; esp (S-I-B follows)
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edw SIB01
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edw SIB10
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edw NoEffectiveAddress
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edw Direct386 ; ebp (00 = direct addressing)
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw Exx00 ; esi
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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edw Exx00 ; edi
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edw Exx01
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edw Exx10
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edw NoEffectiveAddress
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endif ;i386
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glb <ArithmeticOpTab>
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eWORD ArithmeticOpTab ; Uses |Op| for indexing
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edw ADDRQQ ;FADD
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edw MUDRQQ ;FMUL
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edw eFCOM ;FCOM
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edw eFCOMP ;FCOMP
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edw SUDRQQ ;FSUB
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edw SVDRQQ ;FSUBR
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edw DIDRQQ ;FDIV
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edw DRDRQQ ;FDIVR
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glb <NonArithOpMemTab>
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eWORD NonArithOpMemTab ; Uses |Op| for indexing
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edw eFLDsdri ;load(single/double,real/integer)
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edw UNUSED ;reserved
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edw eFSTsdri ;Store(single/double,real/integer)
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edw eFSTPsdri ;Store and POP (single/double,real/integer)
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edw UNUSED ;reserved
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edw eFLDtempORcw ;Load(TempReal or LongInteger), FLDCW
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edw UNUSED ;reserved
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edw eFSTtempORcw ;Store(TempReal or LongInteger), FSTCW ,FSTSW
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glb <NonArithOpRegTab>
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eWORD NonArithOpRegTab ; Uses |Op| for indexing
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edw eFLDregOrFFREE ;load(register), FFREE
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edw eFXCHGreg ;FXCHG
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edw eFSTreg ;Store(register),FNOP
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edw eFSTPreg ;Store and POP (register)
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edw eMISCELANEOUS ;FCHS, FABS, FTST, FXAM, FINIT, FENI, FDISI, FCLEX
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edw eFLDconstants ;FLD1, FLDL2T, FLDL2E, FLDPI, FLDLG2, FLDLN2, FLDZ
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edw etranscendental ;F2XM1, FYL2X, FPTAN, FPATAN, FXTRACT, FDECSTP, FINCSTP
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edw eVARIOUS ;FPREM, FYL2XP1, FSQRT, FRNDINT, FSCALE
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glb <FLDsdriTab>
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eWORD FLDsdriTab ; Uses |MF| for indexing
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edw eFLDsr ;load single real
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edw eFLDdi ;load double integer
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edw eFLDdr ;load double real
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edw eFLDsi ;load single integer
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glb <FSTsdriTab>
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eWORD FSTsdriTab ; Uses |MF| for indexing
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edw eFSTsr ;store single real
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edw eFSTdi ;store double integer
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edw eFSTdr ;store double real
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edw eFSTsi ;store single integer
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glb <FLDtempORcwTab>
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eWORD FLDtempORcwTab ; Uses |MF| for indexing
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edw eFLDCW ;load control word
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edw eFLDtemp ;load temp real
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edw UNUSED ;reserved
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edw eFLDlongint ;load long integer
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glb <FSTtempORcwTab>
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eWORD FSTtempORcwTab ; Uses |MF| for indexing
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edw eFSTCW ;store control word
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edw eFSTtemp ;store temp real
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edw eFSTSW ;store status word
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edw eFSTlongint ;store long integer
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glb <FLDconstantsTab>
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eWORD FLDconstantsTab ; Uses |r/m| for indexing
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edw eFLD1
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edw eFLDL2T
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edw eFLDL2E
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edw eFLDPI
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edw eFLDLG2
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edw eFLDLN2
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edw eFLDZ
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edw UNUSED ;reserved
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glb <TranscendentalTab>
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eWORD TranscendentalTab ; Uses |r/m| for indexing
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edw eF2XM1
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edw eFYL2X
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edw eFPTAN
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edw eFPATAN
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edw eFXTRACT
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edw UNUSED ;reserved
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edw eFDECSTP
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edw eFINCSTP
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glb <VariousTab>
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eWORD VariousTab ; Uses |r/m| for indexing
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edw eFPREM
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edw eFYL2XP1
|
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edw eFSQRT
|
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edw UNUSED ;reserved
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edw eFRNDINT
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edw eFSCALE
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edw UNUSED ;reserved
|
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edw UNUSED ;reserved
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glb <COMtab>
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eWORD COMtab ; SI DI
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edw COMvalidvalid ; valid valid
|
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edw COMsignSI ; valid zero
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edw COMincomprable ; valid NAN
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edw COMsignDIinf ; valid INF
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edw COMsignDI ; zero valid
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edw COMequal ; zero zero
|
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edw COMincomprable ; zero NAN
|
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edw COMsignDIinf ; zero INF
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edw COMincomprable ; NAN valid
|
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edw COMincomprable ; NAN zero
|
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edw COMincomprable ; NAN NAN
|
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edw COMincomprable ; NAN INF
|
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|
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edw COMsignSIinf ; INF valid
|
|||
|
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edw COMsignSIinf ; INF zero
|
|||
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edw COMincomprable ; INF NAN
|
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edw COMinfinf ; INF INF
|
|||
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|
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glb <TSTtab>
|
|||
|
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|
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eWORD TSTtab
|
|||
|
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edw COMsignSI ; valid
|
|||
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edw COMequal ; zero
|
|||
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edw COMincomprable ; NAN
|
|||
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edw COMsignSIinf ; INF
|
|||
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|||
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|
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|
glb <ADDJMPTAB>
|
|||
|
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|
|||
|
|
eWORD ADDJMPTAB
|
|||
|
|
eWORD TAJRQQ
|
|||
|
|
edw RADRQQ ; 0000 D Valid non-0, S Valid non-0
|
|||
|
|
edw DDD ; 0001 D Valid non-0, S 0
|
|||
|
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edw SSINV ; 0010 D Valid non-0, S NAN
|
|||
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|
edw SSS ; 0011 D Valid non-0, S Inf
|
|||
|
|
edw SSS ; 0100 D 0, S Valid non-0
|
|||
|
|
edw DDD ; 0101 D 0, S 0
|
|||
|
|
edw SSINV ; 0110 D 0, S NAN
|
|||
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edw SSS ; 0111 D 0, S Inf
|
|||
|
|
edw DDINV ; 1000 D NAN, S Valid non-0
|
|||
|
|
edw DDINV ; 1001 D NAN, S 0
|
|||
|
|
edw BIGNAN ; 1010 D NAN, S NAN
|
|||
|
|
edw DDINV ; 1011 D NAN, S Inf
|
|||
|
|
edw DDD ; 1100 D Inf, S Valid non-0
|
|||
|
|
edw DDD ; 1101 D Inf, S 0
|
|||
|
|
edw SSINV ; 1110 D Inf, S NAN
|
|||
|
|
edw INFINF ; 1111 D Inf, S Inf
|
|||
|
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|
|||
|
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|
|||
|
|
glb <MULJMPTAB>
|
|||
|
|
|
|||
|
|
eWORD MULJMPTAB
|
|||
|
|
eWORD TMJRQQ
|
|||
|
|
edw RMDRQQ ; 0000 D Valid non-0, S Valid non-0
|
|||
|
|
edw ZEROS ; 0001 D Valid non-0, S 0
|
|||
|
|
edw SSINV ; 0010 D Valid non-0, S NAN
|
|||
|
|
edw INFS ; 0011 D Valid non-0, S Inf
|
|||
|
|
edw ZEROS ; 0100 D 0, S Valid non-0
|
|||
|
|
edw ZEROS ; 0101 D 0, S 0
|
|||
|
|
edw SSINV ; 0110 D 0, S NAN
|
|||
|
|
edw INDINV ; 0111 D 0, S Inf
|
|||
|
|
edw DDINV ; 1000 D NAN, S Valid non-0
|
|||
|
|
edw DDINV ; 1001 D NAN, S 0
|
|||
|
|
edw BIGNAN ; 1010 D NAN, S NAN
|
|||
|
|
edw DDINV ; 1011 D NAN, S Inf
|
|||
|
|
edw INFS ; 1100 D Inf, S Valid non-0
|
|||
|
|
edw INDINV ; 1101 D Inf, S 0
|
|||
|
|
edw SSINV ; 1110 D Inf, S NAN
|
|||
|
|
edw INFS ; 1111 D Inf, S Inf
|
|||
|
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|
|||
|
|
|
|||
|
|
glb <DIVJMPTAB>
|
|||
|
|
|
|||
|
|
eWORD DIVJMPTAB
|
|||
|
|
eWORD TDJRQQ
|
|||
|
|
edw RDDRQQ ; 0000 D Valid non-0, S Valid non-0
|
|||
|
|
edw ZEROS ; 0001 D Valid non-0, S 0
|
|||
|
|
edw SSINV ; 0010 D Valid non-0, S NAN
|
|||
|
|
edw INFS ; 0011 D Valid non-0, S Inf
|
|||
|
|
edw DIV0 ; 0100 D 0, S Valid non-0
|
|||
|
|
edw D0INDINV ; 0101 D 0, S 0
|
|||
|
|
edw D0SSINV ; 0110 D 0, S NAN
|
|||
|
|
edw DIV0 ; 0111 D 0, S Inf
|
|||
|
|
edw DDINV ; 1000 D NAN, S Valid non-0
|
|||
|
|
edw DDINV ; 1001 D NAN, S 0
|
|||
|
|
edw BIGNAN ; 1010 D NAN, S NAN
|
|||
|
|
edw DDINV ; 1011 D NAN, S Inf
|
|||
|
|
edw ZEROS ; 1100 D Inf, S Valid non-0
|
|||
|
|
edw ZEROS ; 1101 D Inf, S 0
|
|||
|
|
edw SSINV ; 1110 D Inf, S NAN
|
|||
|
|
edw INDINV ; 1111 D Inf, S Inf
|
|||
|
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|
|||
|
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|
|||
|
|
glb <XAMtab>
|
|||
|
|
|
|||
|
|
; Tag Flag C3 C2 C1 C0 meaning
|
|||
|
|
XAMtab DB 04H ; 00 0 0 1 0 0 Positive Normal
|
|||
|
|
DB 06H ; 00 1 0 1 1 0 Negative Normal
|
|||
|
|
DB 40H ; 01 0 1 0 0 0 Positive Zero
|
|||
|
|
DB 42H ; 01 1 1 0 1 0 Negative Zero
|
|||
|
|
DB 01H ; 10 0 0 0 0 1 Positive NAN
|
|||
|
|
DB 03H ; 10 1 0 0 1 1 Negative NAN
|
|||
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DB 05H ; 11 0 0 1 0 1 Positive Infinity
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DB 07H ; 11 1 0 1 1 1 Negative Infinity
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