#include <stdint.h>
#include <stdlib.h>

Classes
struct	lh5801_insn_class_desc

struct	lh5801_insn

Typedefs
typedef uint8_t	ut8

Enumerations
enum	lh5801_insn_class { LH5801_INSNC_ADC , LH5801_INSNC_ADI , LH5801_INSNC_DCA , LH5801_INSNC_ADR , LH5801_INSNC_SBC , LH5801_INSNC_SBI , LH5801_INSNC_DCS , LH5801_INSNC_AND , LH5801_INSNC_ANI , LH5801_INSNC_ORA , LH5801_INSNC_ORI , LH5801_INSNC_EOR , LH5801_INSNC_EAI , LH5801_INSNC_INC , LH5801_INSNC_DEC , LH5801_INSNC_CPA , LH5801_INSNC_CPI , LH5801_INSNC_BIT , LH5801_INSNC_BII , LH5801_INSNC_LDA , LH5801_INSNC_LDE , LH5801_INSNC_LIN , LH5801_INSNC_LDI , LH5801_INSNC_LDX , LH5801_INSNC_STA , LH5801_INSNC_SDE , LH5801_INSNC_SIN , LH5801_INSNC_STX , LH5801_INSNC_PSH , LH5801_INSNC_POP , LH5801_INSNC_ATT , LH5801_INSNC_TTA , LH5801_INSNC_TIN , LH5801_INSNC_CIN , LH5801_INSNC_ROL , LH5801_INSNC_ROR , LH5801_INSNC_SHL , LH5801_INSNC_SHR , LH5801_INSNC_DRL , LH5801_INSNC_DRR , LH5801_INSNC_AEX , LH5801_INSNC_SEC , LH5801_INSNC_REC , LH5801_INSNC_CDV , LH5801_INSNC_ATP , LH5801_INSNC_SPU , LH5801_INSNC_RPU , LH5801_INSNC_SPV , LH5801_INSNC_RPV , LH5801_INSNC_SDP , LH5801_INSNC_RDP , LH5801_INSNC_ITA , LH5801_INSNC_SIE , LH5801_INSNC_RIE , LH5801_INSNC_AM0 , LH5801_INSNC_AM1 , LH5801_INSNC_NOP , LH5801_INSNC_HLT , LH5801_INSNC_OFF , LH5801_INSNC_JMP , LH5801_INSNC_BCH , LH5801_INSNC_BCC , LH5801_INSNC_LOP , LH5801_INSNC_SJP , LH5801_INSNC_VEJ , LH5801_INSNC_VMJ , LH5801_INSNC_VCC , LH5801_INSNC_RTN , LH5801_INSNC_RTI , LH5801_INSNC_NUMBER }

Functions
int	lh5801_decode (struct lh5801_insn , const uint8_t , int)

void	lh5801_print_insn (char out, int size, const struct lh5801_insn )

Variables
const struct lh5801_insn_class_desc	lh5801_insn_class_descs [LH5801_INSNC_NUMBER]

Typedef Documentation

◆ ut8

typedef uint8_t ut8

Definition at line 11 of file lh5801.h.

Enumeration Type Documentation

◆ lh5801_insn_class

enum lh5801_insn_class

Enumerator
LH5801_INSNC_ADC
LH5801_INSNC_ADI
LH5801_INSNC_DCA
LH5801_INSNC_ADR
LH5801_INSNC_SBC
LH5801_INSNC_SBI
LH5801_INSNC_DCS
LH5801_INSNC_AND
LH5801_INSNC_ANI
LH5801_INSNC_ORA
LH5801_INSNC_ORI
LH5801_INSNC_EOR
LH5801_INSNC_EAI
LH5801_INSNC_INC
LH5801_INSNC_DEC
LH5801_INSNC_CPA
LH5801_INSNC_CPI
LH5801_INSNC_BIT
LH5801_INSNC_BII
LH5801_INSNC_LDA
LH5801_INSNC_LDE
LH5801_INSNC_LIN
LH5801_INSNC_LDI
LH5801_INSNC_LDX
LH5801_INSNC_STA
LH5801_INSNC_SDE
LH5801_INSNC_SIN
LH5801_INSNC_STX
LH5801_INSNC_PSH
LH5801_INSNC_POP
LH5801_INSNC_ATT
LH5801_INSNC_TTA
LH5801_INSNC_TIN
LH5801_INSNC_CIN
LH5801_INSNC_ROL
LH5801_INSNC_ROR
LH5801_INSNC_SHL
LH5801_INSNC_SHR
LH5801_INSNC_DRL
LH5801_INSNC_DRR
LH5801_INSNC_AEX
LH5801_INSNC_SEC
LH5801_INSNC_REC
LH5801_INSNC_CDV
LH5801_INSNC_ATP
LH5801_INSNC_SPU
LH5801_INSNC_RPU
LH5801_INSNC_SPV
LH5801_INSNC_RPV
LH5801_INSNC_SDP
LH5801_INSNC_RDP
LH5801_INSNC_ITA
LH5801_INSNC_SIE
LH5801_INSNC_RIE
LH5801_INSNC_AM0
LH5801_INSNC_AM1
LH5801_INSNC_NOP
LH5801_INSNC_HLT
LH5801_INSNC_OFF
LH5801_INSNC_JMP
LH5801_INSNC_BCH
LH5801_INSNC_BCC
LH5801_INSNC_LOP
LH5801_INSNC_SJP
LH5801_INSNC_VEJ
LH5801_INSNC_VMJ
LH5801_INSNC_VCC
LH5801_INSNC_RTN
LH5801_INSNC_RTI
LH5801_INSNC_NUMBER

Definition at line 14 of file lh5801.h.

                        {
     LH5801_INSNC_ADC,
     LH5801_INSNC_ADI,
     LH5801_INSNC_DCA,
     LH5801_INSNC_ADR,
     LH5801_INSNC_SBC,
     LH5801_INSNC_SBI,
     LH5801_INSNC_DCS,
     LH5801_INSNC_AND,
     LH5801_INSNC_ANI,
     LH5801_INSNC_ORA,
     LH5801_INSNC_ORI,
     LH5801_INSNC_EOR,
     LH5801_INSNC_EAI,
     LH5801_INSNC_INC,
     LH5801_INSNC_DEC,
     LH5801_INSNC_CPA,
     LH5801_INSNC_CPI,
     LH5801_INSNC_BIT,
     LH5801_INSNC_BII,
     LH5801_INSNC_LDA,
     LH5801_INSNC_LDE,
     LH5801_INSNC_LIN,
     LH5801_INSNC_LDI,
     LH5801_INSNC_LDX,
     LH5801_INSNC_STA,
     LH5801_INSNC_SDE,
     LH5801_INSNC_SIN,
     LH5801_INSNC_STX,
     LH5801_INSNC_PSH,
     LH5801_INSNC_POP,
     LH5801_INSNC_ATT,
     LH5801_INSNC_TTA,
     LH5801_INSNC_TIN,
     LH5801_INSNC_CIN,
     LH5801_INSNC_ROL,
     LH5801_INSNC_ROR,
     LH5801_INSNC_SHL,
     LH5801_INSNC_SHR,
     LH5801_INSNC_DRL,
     LH5801_INSNC_DRR,
     LH5801_INSNC_AEX,
     LH5801_INSNC_SEC,
     LH5801_INSNC_REC,
     LH5801_INSNC_CDV,
     LH5801_INSNC_ATP,
     LH5801_INSNC_SPU,
     LH5801_INSNC_RPU,
     LH5801_INSNC_SPV,
     LH5801_INSNC_RPV,
     LH5801_INSNC_SDP,
     LH5801_INSNC_RDP,
     LH5801_INSNC_ITA,
     LH5801_INSNC_SIE,
     LH5801_INSNC_RIE,
     LH5801_INSNC_AM0,
     LH5801_INSNC_AM1,
     LH5801_INSNC_NOP,
     LH5801_INSNC_HLT,
     LH5801_INSNC_OFF,
     LH5801_INSNC_JMP,
     LH5801_INSNC_BCH,
     LH5801_INSNC_BCC,
     LH5801_INSNC_LOP,
     LH5801_INSNC_SJP,
     LH5801_INSNC_VEJ,
     LH5801_INSNC_VMJ,
     LH5801_INSNC_VCC,
     LH5801_INSNC_RTN,
     LH5801_INSNC_RTI,
  
     LH5801_INSNC_NUMBER
 };

Function Documentation

◆ lh5801_decode()

int lh5801_decode	(	struct lh5801_insn *	insn,
		const uint8_t *	buf,
		int	len
	)

Definition at line 674 of file lh5801.c.

                                                                      {
     int fd = (buf[0] == 0xfd);
     int type = -1;
     unsigned i;
     struct lh5801_insn_desc desc;
  
     if (fd) {
         buf++;
         len--;
     }
  
     if (len == 0)
         return 0;
  
     /* Find the correct opcode */
     for (i = 0; i < ARRAY_LENGTH(lh5801_insn_descs); i++) {
         ut8 byte = *buf;
         unsigned fmt;
         unsigned ifmt_reg;
  
         desc = lh5801_insn_descs[i];
         fmt = desc.format;
         ifmt_reg = fmt & LH5801_IFMT_REG_MASK;
  
         if (!lh5801_ifmt_fd_matches(fmt, fd))
             continue;
  
         /* Ignore instructions referencing the register number 3. */
         if (ifmt_reg == LH5801_IFMT_RREG && (byte >> 4) % 4 == 3)
             continue;
  
         /* Reduce the opcode byte to the relevant bits */
         if (ifmt_reg == LH5801_IFMT_RREG)
             byte &= 0xcf; /* xxRRxxxx */
         if (fmt & LH5801_IFMT_COND)
             byte &= 0xf1; /* xxxxCCCx */
         if (fmt & LH5801_IFMT_BCH)
             byte &= 0xef; /* xxxSxxxx */
  
         if (byte == desc.opcode) {
             type = i;
             break;
         }
  
         /* The short vector subroutine jump instructions require
          * special treatment. */
         if (fmt & LH5801_IFMT_VEJ) {
             if (!(byte & 1) && byte >= 0xc0 && byte <= 0xf6) {
                 type = i;
                 break;
             }
         }
     }
     if (type == -1)
         return -1;
  
     /* fill the insn structure. */
     insn->iclass = desc.iclass;
     insn->type = type;
     insn->fd = fd;
     insn->opcode = buf[0];
     switch (LH5801_IFMT_IMMS(desc.format)) {
     case 3: insn->imm[2] = buf[3]; // fallthrough
     case 2: insn->imm[1] = buf[2]; // fallthrough
     case 1: insn->imm[0] = buf[1]; // fallthrough
     }
  
     /* return the instruction length */
     return fd + 1 + LH5801_IFMT_IMMS(desc.format);
 }

References ARRAY_LENGTH, desc, lh5801_insn::fd, fd, i, lh5801_insn::iclass, lh5801_insn::imm, len, LH5801_IFMT_BCH, LH5801_IFMT_COND, lh5801_ifmt_fd_matches(), LH5801_IFMT_IMMS, LH5801_IFMT_REG_MASK, LH5801_IFMT_RREG, LH5801_IFMT_VEJ, lh5801_insn_descs, lh5801_insn::opcode, lh5801_insn::type, and type.

Referenced by disassemble().

◆ lh5801_print_insn()

void lh5801_print_insn	(	char *	out,
		int	size,
		const struct lh5801_insn *	insn
	)

Definition at line 792 of file lh5801.c.

                                                                             {
     const struct lh5801_insn_class_desc *iclass =
         &lh5801_insn_class_descs[insn->iclass];
     const struct lh5801_insn_desc desc = lh5801_insn_descs[insn->type];
     const char *mnem = iclass->mnem;
     char mnembuf[4];
     char regbuf[8];
  
     /* Conditional instructions have special mnemonics. */
     if (desc.format & LH5801_IFMT_COND) {
         mnembuf[0] = mnem[0]; /* the first character is the same. */
         mnembuf[1] = "chzv"[(insn->opcode >> 2) % 4]; /* which flag */
         mnembuf[2] = (insn->opcode & 2) ? 's' : 'r'; /* set or reset */
         mnembuf[3] = '\0';
         mnem = mnembuf;
     }
  
     /*
      * operand print modes:
      * IMM0:    rl/rh,      REG|LOW, REG|HIGH
      *      r,      REG
      *      (r),        REG|MEM  -> would MEM imply FD_MOD?
      *      s,p     S, P
      *      vej i       VEJ
      * IMM1:    IMM0,i      IMM1
      *      a,i     ACCU
      * IMM2:    ij (jump)
      *      (ij)
      *      s,ij    (ldi)
      * IMM3:    (ij),k
      */
  
     switch (desc.format & ~LH5801_IFMT_RMODE_MASK & ~LH5801_IFMT_COND & ~LH5801_IFMT_FD_MASK) {
     case LH5801_IFMT_VEJ:
         snprintf(out, size, "%s %02xh", mnem, insn->opcode);
         break;
     case LH5801_IFMT_IMM0:
         snprintf(out, size, "%s", mnem);
         break;
     case LH5801_IFMT_IMM0 | LH5801_IFMT_RREG:
     case LH5801_IFMT_IMM0 | LH5801_IFMT_AREG:
     case LH5801_IFMT_IMM0 | LH5801_IFMT_SREG:
     case LH5801_IFMT_IMM0 | LH5801_IFMT_PREG:
         snprintf(out, size, "%s %s", mnem, print_reg(regbuf, insn));
         break;
     case LH5801_IFMT_IMM1:
         snprintf(out, size, "%s %02xh", mnem, insn->imm[0]);
         break;
     case LH5801_IFMT_IMM1 | LH5801_IFMT_RREG:
     case LH5801_IFMT_IMM1 | LH5801_IFMT_AREG:
     case LH5801_IFMT_IMM1 | LH5801_IFMT_SREG:
     case LH5801_IFMT_IMM1 | LH5801_IFMT_PREG:
         snprintf(out, size, "%s %s, %02xh", mnem,
             print_reg(regbuf, insn), insn->imm[0]);
         break;
     case LH5801_IFMT_IMM1 | LH5801_IFMT_BCH:
         snprintf(out, size, "%s %c%02xh", mnem,
             (insn->opcode & 0x10) ? '-' : '+', insn->imm[0]);
         break;
     case LH5801_IFMT_IMM2:
         if (desc.format & LH5801_IFMT_FD_MOD) {
             snprintf(out, size, "%s %s(%02x%02xh)", mnem,
                 insn->fd ? "#" : "",
                 insn->imm[0], insn->imm[1]);
         } else {
             snprintf(out, size, "%s %02x%02xh", mnem,
                 insn->imm[0], insn->imm[1]);
         }
         break;
     case LH5801_IFMT_IMM3:
         if (desc.format & LH5801_IFMT_FD_MOD) {
             snprintf(out, size, "%s %s(%02x%02xh), %02xh", mnem,
                 insn->fd ? "#" : "",
                 insn->imm[0], insn->imm[1], insn->imm[2]);
         } else {
             snprintf(out, size, "imm3 invalid format");
         }
         break;
     default:
         snprintf(out, size, "%s, BUG: unknown format 0x%x -> 0x%x",
             mnem, desc.format,
             desc.format & ~LH5801_IFMT_RMODE_MASK &
                 ~LH5801_IFMT_COND & ~LH5801_IFMT_FD_MASK);
     }
 }

References desc, lh5801_insn::fd, lh5801_insn_desc::iclass, lh5801_insn::iclass, lh5801_insn::imm, LH5801_IFMT_AREG, LH5801_IFMT_BCH, LH5801_IFMT_COND, LH5801_IFMT_FD_MASK, LH5801_IFMT_FD_MOD, LH5801_IFMT_IMM0, LH5801_IFMT_IMM1, LH5801_IFMT_IMM2, LH5801_IFMT_IMM3, LH5801_IFMT_PREG, LH5801_IFMT_RMODE_MASK, LH5801_IFMT_RREG, LH5801_IFMT_SREG, LH5801_IFMT_VEJ, lh5801_insn_class_descs, lh5801_insn_descs, mnem, lh5801_insn::opcode, out, print_reg(), snprintf, and lh5801_insn::type.

Referenced by disassemble().

Variable Documentation

◆ lh5801_insn_class_descs

const struct lh5801_insn_class_desc lh5801_insn_class_descs[LH5801_INSNC_NUMBER]

Definition at line 11 of file lh5801.h.

Classes

Typedefs

Enumerations

Functions

Variables