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-rw-r--r--src/devices/cpu/dsp56156/tables.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/devices/cpu/dsp56156/tables.h b/src/devices/cpu/dsp56156/tables.h
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index 00000000000..9ef1dc76b32
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+++ b/src/devices/cpu/dsp56156/tables.h
@@ -0,0 +1,93 @@
+// license:BSD-3-Clause
+// copyright-holders:Andrew Gardner
+#ifndef DSP56156_TABLES_H
+#define DSP56156_TABLES_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "dsp56156.h"
+
+namespace DSP_56156
+{
+#define BITSn(CUR,MASK) (dsp56156_op_maskn(CUR,MASK))
+
+enum bitsModified {BM_NONE = 0x0, BM_LOW = 0x1, BM_MIDDLE = 0x2, BM_HIGH = 0x4};
+
+enum bfShift {BBB_UPPER, BBB_MIDDLE, BBB_LOWER, BBB_INVALID};
+enum reg_id {iX, iX0, iX1,
+ iY, iY0, iY1,
+ iA, iA0, iA1, iA2,
+ iB, iB0, iB1, iB2,
+ iR0, iR1, iR2, iR3,
+ iN0, iN1, iN2, iN3,
+ iM0, iM1, iM2, iM3,
+ iLC, iSR, iOMR, iSP, iSSH, iSSL, iLA, iMR, iCCR,
+ iF, iFHAT,
+ iINVALID, iWEIRD};
+
+enum op_mnem {oCC, oGE, oNE, oPL,
+ oNN, oEC, oLC, oGT,
+ oCS, oLT, oEQ, oMI,
+ oNR, oES, oLS, oLE,
+ oSS, oSU, oUU, oINVALID};
+
+
+bfShift decode_BBB_table(uint16_t BBB);
+void decode_cccc_table(const uint16_t cccc, op_mnem& mnemonic);
+void decode_DDDDD_table(const uint16_t DDDDD, reg_id& SD);
+void decode_DD_table(const uint16_t DD, reg_id& SD);
+void decode_DDF_table(const uint16_t DD, const uint16_t F, reg_id& S, reg_id& D);
+void decode_EE_table(const uint16_t EE, reg_id& D);
+void decode_F_table(const uint16_t F, reg_id& SD);
+void decode_h0hF_table(const uint16_t h0h, uint16_t F, reg_id& S, reg_id& D);
+void decode_HH_table(const uint16_t HH, reg_id& SD);
+void decode_HHH_table(const uint16_t HHH, reg_id& SD);
+void decode_IIIIx_table(const uint16_t IIII, const uint16_t x, reg_id& S, reg_id& D);
+void decode_JJJF_table(const uint16_t JJJ, const uint16_t F, reg_id& S, reg_id& D);
+void decode_JJF_table(const uint16_t JJ, const uint16_t F, reg_id& S, reg_id& D);
+void decode_JF_table(const uint16_t J, const uint16_t F, reg_id& S, reg_id& D);
+void decode_kSign_table(const uint16_t k, std::string& plusMinus);
+void decode_KKK_table(const uint16_t KKK, reg_id& D1, reg_id& D2);
+void decode_NN_table(uint16_t NN, reg_id& ret);
+void decode_TT_table(uint16_t TT, reg_id& ret);
+void decode_QQF_table(const uint16_t QQ, const uint16_t F, reg_id& S1, reg_id& S2, reg_id& D);
+void decode_QQF_special_table(const uint16_t QQ, const uint16_t F, reg_id& S1, reg_id& S2, reg_id& D);
+void decode_QQQF_table(const uint16_t QQQ, const uint16_t F, reg_id& S1, reg_id& S2, reg_id& D);
+void decode_RR_table(uint16_t RR, reg_id& ret);
+void decode_rr_table(uint16_t rr, reg_id& ret);
+void decode_s_table(const uint16_t s, op_mnem& arithmetic);
+void decode_ss_table(const uint16_t ss, op_mnem& arithmetic);
+void decode_uuuuF_table(const uint16_t uuuu, const uint16_t F, std::string& arg, reg_id& S, reg_id& D);
+void decode_Z_table(const uint16_t Z, std::string& ea);
+
+void assemble_ea_from_m_table(const uint16_t m, const int n, std::string& ea);
+void assemble_eas_from_mm_table(uint16_t mm, int n1, int n2, std::string& ea1, std::string& ea2);
+void assemble_ea_from_MM_table(uint16_t MM, int n, std::string& ea);
+void assemble_ea_from_q_table(uint16_t q, int n, std::string& ea);
+void assemble_ea_from_t_table(uint16_t t, uint16_t val, std::string& ea);
+void assemble_ea_from_z_table(uint16_t z, int n, std::string& ea);
+void assemble_D_from_P_table(uint16_t P, uint16_t ppppp, std::string& D);
+void assemble_arguments_from_W_table(uint16_t W, char ma, const reg_id& SD, const std::string& ea, std::string& S, std::string& D);
+void assemble_arguments_from_W_table(uint16_t W, char ma, const std::string& SD, const std::string& ea, std::string& S, std::string& D);
+void assemble_reg_from_W_table(uint16_t W, char ma, const reg_id& SD, const int8_t xx, std::string& S, std::string& D);
+void assemble_address_from_IO_short_address(uint16_t pp, std::string& ea);
+
+int8_t get_6_bit_signed_value(uint16_t bits);
+
+// Helpers
+uint16_t dsp56156_op_maskn(uint16_t cur, uint16_t mask);
+
+bool registerOverlap(const reg_id& r0, const size_t bmd, const reg_id& r1);
+
+uint16_t regValue16(dsp56156_core* cpustate, const reg_id& reg);
+void setReg16(dsp56156_core* cpustate, const uint16_t& value, const reg_id& reg);
+
+std::string regIdAsString(const reg_id& regId);
+std::string opMnemonicAsString(const op_mnem& mnem);
+reg_id stringAsRegID(const std::string& str);
+uint8_t regIDAsNum(const reg_id& regId);
+
+
+}
+#endif