mirror of http://shamusworld.gotdns.org/git/rmac
150 lines
6.5 KiB
C
150 lines
6.5 KiB
C
//
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// RMAC - Renamed Macro Assembler for the Atari Jaguar Console System
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// DSP56K_AMODE.H - Addressing Modes for Motorola DSP56001
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// Copyright (C) 199x Landon Dyer, 2011-2021 Reboot and Friends
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// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
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// Source utilised with the kind permission of Landon Dyer
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//
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#ifndef __DSP56K_AMODE_H__
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#define __DSP56K_AMODE_H__
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#include "rmac.h"
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#include "amode.h"
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// Addressing-mode masks
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#define M_ACC56 0x00000001L // Accumulators A=A2:A1:A0 and B=B2:B1:B0
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#define M_ACC48 0x00000002L // Accumulators AB=A1:B1, BA=B1:A1, A10=A1:A0, B10=B1:B0
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#define M_ACC24 0x00000004L // Accumulators A0, A1, B0 and B1
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#define M_ACC8 0x00000008L // Accumulators A2 and B2
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#define M_INP48 0x00000010L // Input registers X=X1:X0 and Y=Y1:Y0
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#define M_ALU24 0x00000020L // Data ALU input registers X1, X0, Y1, Y0
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#define M_DSPIM 0x00000040L // #data
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#define M_DSPIM12 0x00000080L // #data
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//#define M_DSPIM24 0x0000010 // #data
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#define M_DSPPCU 0x00000200L // Program control unit registers PC, MR, CCR, SR, OMR, LA, LC, SP, SS, SSH, SSL
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#define M_DSPEA 0x00000400L // Effective addressing modes (Rn)-Nn, (Rn)+Nn, (Rn)-, (Rn)+, (Rn), (Rn+Nn), -(Rn), <absolute address>
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#define M_DSPAA 0x00000800L // 6-bit Absolute Short Address
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#define M_DSPPP 0x00001000L // 6-bit I/O Short Address
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#define M_DSPM 0x00002000L // Modifier registers M0-M7
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#define M_DSPR 0x00004000L // Address registers R0-R7
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#define M_DSPN 0x00008000L // Address offset registers N0-N7
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#define M_DSPABS12 0x00010000L // xxx.12bit
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#define M_DSPABS24 0x00020000L // xxx.24bit
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#define M_DSPABS06 0x00040000L // xxx.6bit
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#define M_DSPABS16 0x00080000L // xxx.16bit
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#define M_DSPIM8 0x00100000L // #data
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#define M_ALL48 (M_ACC56|M_INP48|M_ALU24) // Input registers X=X1:X0, Y=Y1:Y0, A=A2:A1:A0, B=B2:B1:B0, X0, X1, Y0, Y1
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#define C_DD (M_ALU24) // 4 registers in data ALU: x0, x1, y0, y1
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#define C_DDD (M_ACC56|M_ACC24|M_ACC8) // 8 accumulators in data ALU: a0, b0, a2, b2, a1, b1, a, b
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#define C_LLL (M_ACC56|M_ACC48|M_INP48) // 8 extended-precision registers in data ALU: a10, b10, x, y, a, b, ab, ba
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#define C_FFF (M_DSPM) // 8 address modifier registers in address ALU: m0-m7
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#define C_NNN (M_DSPN) // 8 address offset registers in address ALU: n0-n7
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#define C_TTT (M_DSPR) // 8 address registers in address: r0-r7
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#define C_GGG (M_DSPPCU) // 8 program controller registers: sr, omr, sp, ssh, la, lc
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#define C_A18 (M_ALU24|C_DDD|C_LLL|C_FFF|C_NNN|C_TTT|C_GGG) // All of the above registers
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#define C_DSPABS24 (M_DSPABS06|M_DSPABS12|M_DSPABS16|M_DSPABS24) // Everything up to 24-bit addresses
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#define C_DSPABSEA (C_DSPABS24|M_DSPEA) // All absolute addresses and all other ea addressing modes
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#define C_DSPABS16 (M_DSPABS06|M_DSPABS12|M_DSPABS16) // Everything up to 16-bit addresses
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#define C_LUADST (M_DSPR|M_DSPN) // Mask for LUA instruction destination
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#define C_MOVEC (M_DSPM|M_DSPPCU) // M0-M7 and SR, OMR, LA, LC, SP, SS, SSH, SSL
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#define C_DSPIM (M_DSPIM8 | M_DSPIM | M_DSPIM12) // All the immmediate sizes we want to alias
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// Xn Input Register X1 or X0 (24 Bits)
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// Yn Input Register Y1 or Y0 (24 Bits)
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// An Accumulator Registers A2, A1, A0 (A2 <20> 8 Bits, A1 and A0 <20> 24 Bits)
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// Bn Accumulator Registers B2, B1, B0 (B2 <20> 8 Bits, B1 and B0 <20> 24 Bits)
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// X Input Register X = X1: X0 (48 Bits)
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// Y Input Register Y = Y1: Y0 (48 Bits)
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// A Accumulator A = A2: A1: A0 (56 Bits)*
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// B Accumulator B = B2: B1: B0 (56 BIts)*
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// AB Accumulators A and B = A1: B1 (48 Bits)*
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// BA Accumulators B and A = B1: A1 (48 Bits)*
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// A10 Accumulator A = A1: A0 (48 Bits)
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// B10 Accumulator B= B1:B0 (48 bits)
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// Attribute masks
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#define PARMOVE 0x00000001L
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#define NOPARMO 0x00000000L
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// DSP EA modes
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#define DSP_EA_POSTDEC 0b00000000
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#define DSP_EA_POSTINC 0b00001000
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#define DSP_EA_POSTDEC1 0b00010000
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#define DSP_EA_POSTINC1 0b00011000
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#define DSP_EA_NOUPD 0b00100000
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#define DSP_EA_INDEX 0b00101000
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#define DSP_EA_PREDEC1 0b00111000
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#define DSP_EA_ABS 0b00110000
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#define DSP_EA_IMM 0b00110100
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// Mnemonic table structure
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#define MNTABDSP struct _mntabdsp
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MNTABDSP {
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LONG mn0, mn1; // Addressing modes
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WORD mnattr; // Attributes (PARMOVE, ...)
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LONG mninst; // Instruction mask
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WORD mncont; // Continuation (or -1)
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int (* mnfunc)(LONG); // Mnemonic builder
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};
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// Addressing mode variables, output of dsp_amode()
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extern int dsp_am0; // Addressing mode
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extern int dsp_a0reg; // Register
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extern int dsp_am1; // Addressing mode
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extern int dsp_a1reg; // Register
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extern int dsp_am2; // Addressing mode
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extern int dsp_a2reg; // Register
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extern int dsp_am3; // Addressing mode
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extern int dsp_a3reg; // Register
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extern TOKEN dsp_a0expr[EXPRSIZE]; // Expression
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extern uint64_t dsp_a0exval; // Expression's value
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extern WORD dsp_a0exattr; // Expression's attribute
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extern SYM * dsp_a0esym; // External symbol involved in expr
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extern LONG dsp_a0memspace; // Addressing mode's memory space (P, X, Y)
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extern LONG dsp_a0perspace; // Peripheral space (X, Y - used in movep)
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extern TOKEN dsp_a1expr[EXPRSIZE]; // Expression
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extern uint64_t dsp_a1exval; // Expression's value
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extern WORD dsp_a1exattr; // Expression's attribute
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extern SYM * dsp_a1esym; // External symbol involved in expr
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extern LONG dsp_a1memspace; // Addressing mode's memory space (P, X, Y)
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extern LONG dsp_a1perspace; // Peripheral space (X, Y - used in movep)
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extern TOKEN dsp_a2expr[EXPRSIZE]; // Expression
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extern uint64_t dsp_a2exval; // Expression's value
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extern WORD dsp_a2exattr; // Expression's attribute
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extern SYM * dsp_a2esym; // External symbol involved in expr
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extern TOKEN dsp_a3expr[EXPRSIZE]; // Expression
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extern uint64_t dsp_a3exval; // Expression's value
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extern WORD dsp_a3exattr; // Expression's attribute
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extern SYM * dsp_a3esym; // External symbol involved in expr
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extern int dsp_k; // Multiplications sign
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extern TOKEN dspImmedEXPR[EXPRSIZE]; // Expression
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extern uint64_t dspImmedEXVAL; // Expression's value
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extern WORD dspImmedEXATTR; // Expression's attribute
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extern SYM * dspImmedESYM; // External symbol involved in expr
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extern int deposit_extra_ea; // Optional effective address extension
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// Extra ea deposit modes
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enum
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{
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DEPOSIT_EXTRA_WORD = 1,
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DEPOSIT_EXTRA_FIXUP = 2,
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};
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// Prototypes
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int dsp_amode(int maxea);
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LONG parmoves(WORD dest);
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int dsp_tcc4(LONG inst);
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#endif // __DSP56K_AMODE_H__
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