sh4-dis.c

qemu虚拟机代码

/* 1111nnnn10011101 fldi1 <F_REG_N>    */{"fldi1",{F_REG_N},{HEX_F,REG_N,HEX_9,HEX_D}, arch_sh2e_up},

/* 1111nnnn00011101 flds <F_REG_N>,FPUL*/{"flds",{F_REG_N,FPUL_M},{HEX_F,REG_N,HEX_1,HEX_D}, arch_sh2e_up},

/* 1111nnnn00101101 float FPUL,<F_REG_N>*/{"float",{FPUL_M,F_REG_N},{HEX_F,REG_N,HEX_2,HEX_D}, arch_sh2e_up},
/* 1111nnn000101101 float FPUL,<D_REG_N>*/{"float",{FPUL_M,D_REG_N},{HEX_F,REG_N,HEX_2,HEX_D}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm1110 fmac FR0,<F_REG_M>,<F_REG_N>*/{"fmac",{F_FR0,F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_E}, arch_sh2e_up},

/* 1111nnnnmmmm1100 fmov <F_REG_M>,<F_REG_N>*/{"fmov",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_C}, arch_sh2e_up},
/* 1111nnn1mmmm1100 fmov <DX_REG_M>,<DX_REG_N>*/{"fmov",{DX_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_C}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm1000 fmov @<REG_M>,<F_REG_N>*/{"fmov",{A_IND_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_8}, arch_sh2e_up},
/* 1111nnn1mmmm1000 fmov @<REG_M>,<DX_REG_N>*/{"fmov",{A_IND_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_8}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm1010 fmov <F_REG_M>,@<REG_N>*/{"fmov",{F_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}, arch_sh2e_up},
/* 1111nnnnmmm11010 fmov <DX_REG_M>,@<REG_N>*/{"fmov",{DX_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm1001 fmov @<REG_M>+,<F_REG_N>*/{"fmov",{A_INC_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_9}, arch_sh2e_up},
/* 1111nnn1mmmm1001 fmov @<REG_M>+,<DX_REG_N>*/{"fmov",{A_INC_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_9}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm1011 fmov <F_REG_M>,@-<REG_N>*/{"fmov",{F_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}, arch_sh2e_up},
/* 1111nnnnmmm11011 fmov <DX_REG_M>,@-<REG_N>*/{"fmov",{DX_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm0110 fmov @(R0,<REG_M>),<F_REG_N>*/{"fmov",{A_IND_R0_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_6}, arch_sh2e_up},
/* 1111nnn1mmmm0110 fmov @(R0,<REG_M>),<DX_REG_N>*/{"fmov",{A_IND_R0_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_6}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmmm0111 fmov <F_REG_M>,@(R0,<REG_N>)*/{"fmov",{F_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}, arch_sh2e_up},
/* 1111nnnnmmm10111 fmov <DX_REG_M>,@(R0,<REG_N>)*/{"fmov",{DX_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}, arch_sh4_up | arch_sh2a_up},

/* 1111nnn1mmmm1000 fmov.d @<REG_M>,<DX_REG_N>*/{"fmov.d",{A_IND_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_8}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmm11010 fmov.d <DX_REG_M>,@<REG_N>*/{"fmov.d",{DX_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}, arch_sh4_up | arch_sh2a_up},

/* 1111nnn1mmmm1001 fmov.d @<REG_M>+,<DX_REG_N>*/{"fmov.d",{A_INC_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_9}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmm11011 fmov.d <DX_REG_M>,@-<REG_N>*/{"fmov.d",{DX_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}, arch_sh4_up | arch_sh2a_up},

/* 1111nnn1mmmm0110 fmov.d @(R0,<REG_M>),<DX_REG_N>*/{"fmov.d",{A_IND_R0_REG_M,DX_REG_N},{HEX_F,REG_N,REG_M,HEX_6}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnnmmm10111 fmov.d <DX_REG_M>,@(R0,<REG_N>)*/{"fmov.d",{DX_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}, arch_sh4_up | arch_sh2a_up},
/* 0011nnnnmmmm0001 0011dddddddddddd fmov.d <F_REG_M>,@(<DISP12>,<REG_N>) */
{"fmov.d",{DX_REG_M,A_DISP_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_3,DISP1_12BY8}, arch_sh2a_up | arch_op32},
/* 0011nnnnmmmm0001 0111dddddddddddd fmov.d @(<DISP12>,<REG_M>),F_REG_N */
{"fmov.d",{A_DISP_REG_M,DX_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_7,DISP0_12BY8}, arch_sh2a_up | arch_op32},

/* 1111nnnnmmmm1000 fmov.s @<REG_M>,<F_REG_N>*/{"fmov.s",{A_IND_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_8}, arch_sh2e_up},

/* 1111nnnnmmmm1010 fmov.s <F_REG_M>,@<REG_N>*/{"fmov.s",{F_REG_M,A_IND_N},{HEX_F,REG_N,REG_M,HEX_A}, arch_sh2e_up},

/* 1111nnnnmmmm1001 fmov.s @<REG_M>+,<F_REG_N>*/{"fmov.s",{A_INC_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_9}, arch_sh2e_up},

/* 1111nnnnmmmm1011 fmov.s <F_REG_M>,@-<REG_N>*/{"fmov.s",{F_REG_M,A_DEC_N},{HEX_F,REG_N,REG_M,HEX_B}, arch_sh2e_up},

/* 1111nnnnmmmm0110 fmov.s @(R0,<REG_M>),<F_REG_N>*/{"fmov.s",{A_IND_R0_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_6}, arch_sh2e_up},

/* 1111nnnnmmmm0111 fmov.s <F_REG_M>,@(R0,<REG_N>)*/{"fmov.s",{F_REG_M,A_IND_R0_REG_N},{HEX_F,REG_N,REG_M,HEX_7}, arch_sh2e_up},
/* 0011nnnnmmmm0001 0011dddddddddddd fmov.s <F_REG_M>,@(<DISP12>,<REG_N>) */
{"fmov.s",{F_REG_M,A_DISP_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_3,DISP1_12BY4}, arch_sh2a_up | arch_op32},
/* 0011nnnnmmmm0001 0111dddddddddddd fmov.s @(<DISP12>,<REG_M>),F_REG_N */
{"fmov.s",{A_DISP_REG_M,F_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_7,DISP0_12BY4}, arch_sh2a_up | arch_op32},

/* 1111nnnnmmmm0010 fmul <F_REG_M>,<F_REG_N>*/{"fmul",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_2}, arch_sh2e_up},
/* 1111nnn0mmm00010 fmul <D_REG_M>,<D_REG_N>*/{"fmul",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_2}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnn01001101 fneg <F_REG_N>     */{"fneg",{F_REG_N},{HEX_F,REG_N,HEX_4,HEX_D}, arch_sh2e_up},
/* 1111nnn001001101 fneg <D_REG_N>     */{"fneg",{D_REG_N},{HEX_F,REG_N,HEX_4,HEX_D}, arch_sh4_up | arch_sh2a_up},

/* 1111011111111101 fpchg               */{"fpchg",{0},{HEX_F,HEX_7,HEX_F,HEX_D}, arch_sh4a_up},

/* 1111101111111101 frchg               */{"frchg",{0},{HEX_F,HEX_B,HEX_F,HEX_D}, arch_sh4_up},

/* 1111nnn011111101 fsca FPUL,<D_REG_N> */{"fsca",{FPUL_M,D_REG_N},{HEX_F,REG_N_D,HEX_F,HEX_D}, arch_sh4_up},

/* 1111001111111101 fschg               */{"fschg",{0},{HEX_F,HEX_3,HEX_F,HEX_D}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnn01101101 fsqrt <F_REG_N>    */{"fsqrt",{F_REG_N},{HEX_F,REG_N,HEX_6,HEX_D}, arch_sh3e_up | arch_sh2a_up},
/* 1111nnn001101101 fsqrt <D_REG_N>    */{"fsqrt",{D_REG_N},{HEX_F,REG_N,HEX_6,HEX_D}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnn01111101 fsrra <F_REG_N>    */{"fsrra",{F_REG_N},{HEX_F,REG_N,HEX_7,HEX_D}, arch_sh4_up},

/* 1111nnnn00001101 fsts FPUL,<F_REG_N>*/{"fsts",{FPUL_M,F_REG_N},{HEX_F,REG_N,HEX_0,HEX_D}, arch_sh2e_up},

/* 1111nnnnmmmm0001 fsub <F_REG_M>,<F_REG_N>*/{"fsub",{F_REG_M,F_REG_N},{HEX_F,REG_N,REG_M,HEX_1}, arch_sh2e_up},
/* 1111nnn0mmm00001 fsub <D_REG_M>,<D_REG_N>*/{"fsub",{D_REG_M,D_REG_N},{HEX_F,REG_N,REG_M,HEX_1}, arch_sh4_up | arch_sh2a_up},

/* 1111nnnn00111101 ftrc <F_REG_N>,FPUL*/{"ftrc",{F_REG_N,FPUL_M},{HEX_F,REG_N,HEX_3,HEX_D}, arch_sh2e_up},
/* 1111nnnn00111101 ftrc <D_REG_N>,FPUL*/{"ftrc",{D_REG_N,FPUL_M},{HEX_F,REG_N,HEX_3,HEX_D}, arch_sh4_up | arch_sh2a_up},

/* 1111nn0111111101 ftrv XMTRX_M4,<V_REG_n>*/{"ftrv",{XMTRX_M4,V_REG_N},{HEX_F,REG_N_B01,HEX_F,HEX_D}, arch_sh4_up},

  /* 10000110nnnn0iii bclr #<imm>, <REG_N> */  {"bclr",{A_IMM, A_REG_N},{HEX_8,HEX_6,REG_N,IMM0_3c}, arch_sh2a_nofpu_up},
  /* 0011nnnn0iii1001 0000dddddddddddd bclr.b #<imm>,@(<DISP12>,<REG_N>) */
{"bclr.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_0,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
  /* 10000111nnnn1iii bld #<imm>, <REG_N> */   {"bld",{A_IMM, A_REG_N},{HEX_8,HEX_7,REG_N,IMM0_3s}, arch_sh2a_nofpu_up},
  /* 0011nnnn0iii1001 0011dddddddddddd bld.b #<imm>,@(<DISP12>,<REG_N>) */
{"bld.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_3,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
  /* 10000110nnnn1iii bset #<imm>, <REG_N> */  {"bset",{A_IMM, A_REG_N},{HEX_8,HEX_6,REG_N,IMM0_3s}, arch_sh2a_nofpu_up},
  /* 0011nnnn0iii1001 0001dddddddddddd bset.b #<imm>,@(<DISP12>,<REG_N>) */
{"bset.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_1,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
  /* 10000111nnnn0iii bst #<imm>, <REG_N> */   {"bst",{A_IMM, A_REG_N},{HEX_8,HEX_7,REG_N,IMM0_3c}, arch_sh2a_nofpu_up},
  /* 0011nnnn0iii1001 0010dddddddddddd bst.b #<imm>,@(<DISP12>,<REG_N>) */
{"bst.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_2,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
  /* 0100nnnn10010001 clips.b <REG_N> */       {"clips.b",{A_REG_N},{HEX_4,REG_N,HEX_9,HEX_1}, arch_sh2a_nofpu_up},
  /* 0100nnnn10010101 clips.w <REG_N> */       {"clips.w",{A_REG_N},{HEX_4,REG_N,HEX_9,HEX_5}, arch_sh2a_nofpu_up},
  /* 0100nnnn10000001 clipu.b <REG_N> */       {"clipu.b",{A_REG_N},{HEX_4,REG_N,HEX_8,HEX_1}, arch_sh2a_nofpu_up},
  /* 0100nnnn10000101 clipu.w <REG_N> */       {"clipu.w",{A_REG_N},{HEX_4,REG_N,HEX_8,HEX_5}, arch_sh2a_nofpu_up},
  /* 0100nnnn10010100 divs R0,<REG_N> */       {"divs",{A_R0,A_REG_N},{HEX_4,REG_N,HEX_9,HEX_4}, arch_sh2a_nofpu_up},
  /* 0100nnnn10000100 divu R0,<REG_N> */       {"divu",{A_R0,A_REG_N},{HEX_4,REG_N,HEX_8,HEX_4}, arch_sh2a_nofpu_up},
  /* 0100mmmm01001011 jsr/n @<REG_M>  */       {"jsr/n",{A_IND_M},{HEX_4,REG_M,HEX_4,HEX_B}, arch_sh2a_nofpu_up},
  /* 10000011dddddddd jsr/n @@(<disp>,TBR) */  {"jsr/n",{A_DISP2_TBR},{HEX_8,HEX_3,IMM0_8BY4}, arch_sh2a_nofpu_up},
  /* 0100mmmm11100101 ldbank @<REG_M>,R0 */    {"ldbank",{A_IND_M,A_R0},{HEX_4,REG_M,HEX_E,HEX_5}, arch_sh2a_nofpu_up},
  /* 0100mmmm11110001 movml.l <REG_M>,@-R15 */ {"movml.l",{A_REG_M,A_DEC_R15},{HEX_4,REG_M,HEX_F,HEX_1}, arch_sh2a_nofpu_up},
  /* 0100mmmm11110101 movml.l @R15+,<REG_M> */ {"movml.l",{A_INC_R15,A_REG_M},{HEX_4,REG_M,HEX_F,HEX_5}, arch_sh2a_nofpu_up},
  /* 0100mmmm11110000 movml.l <REG_M>,@-R15 */ {"movmu.l",{A_REG_M,A_DEC_R15},{HEX_4,REG_M,HEX_F,HEX_0}, arch_sh2a_nofpu_up},
  /* 0100mmmm11110100 movml.l @R15+,<REG_M> */ {"movmu.l",{A_INC_R15,A_REG_M},{HEX_4,REG_M,HEX_F,HEX_4}, arch_sh2a_nofpu_up},
  /* 0000nnnn00111001 movrt <REG_N> */         {"movrt",{A_REG_N},{HEX_0,REG_N,HEX_3,HEX_9}, arch_sh2a_nofpu_up},
  /* 0100nnnn10000000 mulr R0,<REG_N> */       {"mulr",{A_R0,A_REG_N},{HEX_4,REG_N,HEX_8,HEX_0}, arch_sh2a_nofpu_up},
  /* 0000000001101000 nott */                  {"nott",{A_END},{HEX_0,HEX_0,HEX_6,HEX_8}, arch_sh2a_nofpu_up},
  /* 0000000001011011 resbank */               {"resbank",{A_END},{HEX_0,HEX_0,HEX_5,HEX_B}, arch_sh2a_nofpu_up},
  /* 0000000001101011 rts/n */                 {"rts/n",{A_END},{HEX_0,HEX_0,HEX_6,HEX_B}, arch_sh2a_nofpu_up},
  /* 0000mmmm01111011 rtv/n <REG_M>*/          {"rtv/n",{A_REG_M},{HEX_0,REG_M,HEX_7,HEX_B}, arch_sh2a_nofpu_up},
  /* 0100nnnn11100001 stbank R0,@<REG_N>*/     {"stbank",{A_R0,A_IND_N},{HEX_4,REG_N,HEX_E,HEX_1}, arch_sh2a_nofpu_up},

/* 0011nnnn0iii1001 0100dddddddddddd band.b #<imm>,@(<DISP12>,<REG_N>) */
{"band.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_4,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnn0iii1001 1100dddddddddddd bandnot.b #<imm>,@(<DISP12>,<REG_N>) */
{"bandnot.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_C,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnn0iii1001 1011dddddddddddd bldnot.b #<imm>,@(<DISP12>,<REG_N>) */
{"bldnot.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_B,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnn0iii1001 0101dddddddddddd bor.b #<imm>,@(<DISP12>,<REG_N>) */
{"bor.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_5,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnn0iii1001 1101dddddddddddd bornot.b #<imm>,@(<DISP12>,<REG_N>) */
{"bornot.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_D,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnn0iii1001 0110dddddddddddd bxor.b #<imm>,@(<DISP12>,<REG_N>) */
{"bxor.b",{A_IMM,A_DISP_REG_N},{HEX_3,REG_N,IMM0_3Uc,HEX_9,HEX_6,DISP1_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0000nnnniiii0000 iiiiiiiiiiiiiiii movi20 #<imm>,<REG_N> */
{"movi20",{A_IMM,A_REG_N},{HEX_0,REG_N,IMM0_20_4,HEX_0,IMM0_20}, arch_sh2a_nofpu_up | arch_op32},
/* 0000nnnniiii0001 iiiiiiiiiiiiiiii movi20s #<imm>,<REG_N> */
{"movi20s",{A_IMM,A_REG_N},{HEX_0,REG_N,IMM0_20_4,HEX_1,IMM0_20BY8}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnnmmmm0001 1000dddddddddddd movu.b @(<DISP12>,<REG_M>),<REG_N> */
{"movu.b",{A_DISP_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_8,DISP0_12}, arch_sh2a_nofpu_up | arch_op32},
/* 0011nnnnmmmm0001 1001dddddddddddd movu.w @(<DISP12>,<REG_M>),<REG_N> */
{"movu.w",{A_DISP_REG_M,A_REG_N},{HEX_3,REG_N,REG_M,HEX_1,HEX_9,DISP0_12BY2}, arch_sh2a_nofpu_up | arch_op32},

{ 0, {0}, {0}, 0 } 
};

#endif

#ifdef ARCH_all
#define INCLUDE_SHMEDIA
#endif

static void print_movxy
  PARAMS ((const sh_opcode_info *, int, int, fprintf_ftype, void *));
static void print_insn_ddt PARAMS ((int, struct disassemble_info *));
static void print_dsp_reg PARAMS ((int, fprintf_ftype, void *));
static void print_insn_ppi PARAMS ((int, struct disassemble_info *));

static void
print_movxy (op, rn, rm, fprintf_fn, stream)
     const sh_opcode_info *op;
     int rn, rm;
     fprintf_ftype fprintf_fn;
     void *stream;
{
  int n;

  fprintf_fn (stream, "%s\t", op->name);
  for (n = 0; n < 2; n++)
    {
      switch (op->arg[n])
	{
	case A_IND_N:
	case AX_IND_N:
	case AXY_IND_N:
	case AY_IND_N:
	case AYX_IND_N:
	  fprintf_fn (stream, "@r%d", rn);
	  break;
	case A_INC_N:
	case AX_INC_N:
	case AXY_INC_N:
	case AY_INC_N:
	case AYX_INC_N:
	  fprintf_fn (stream, "@r%d+", rn);
	  break;
	case AX_PMOD_N:
	case AXY_PMOD_N:
	  fprintf_fn (stream, "@r%d+r8", rn);
	  break;
	case AY_PMOD_N:
	case AYX_PMOD_N:
	  fprintf_fn (stream, "@r%d+r9", rn);
	  break;
	case DSP_REG_A_M:
	  fprintf_fn (stream, "a%c", '0' + rm);
	  break;
	case DSP_REG_X:
	  fprintf_fn (stream, "x%c", '0' + rm);
	  break;
	case DSP_REG_Y:
	  fprintf_fn (stream, "y%c", '0' + rm);
	  break;
	case DSP_REG_AX:
	  fprintf_fn (stream, "%c%c",
		      (rm & 1) ? 'x' : 'a',
		      (rm & 2) ? '1' : '0');
	  break;
	case DSP_REG_XY:
	  fprintf_fn (stream, "%c%c",
		      (rm & 1) ? 'y' : 'x',
		      (rm & 2) ? '1' : '0');
	  break;
	case DSP_REG_AY:
	  fprintf_fn (stream, "%c%c",
		      (rm & 2) ? 'y' : 'a',
		      (rm & 1) ? '1' : '0');
	  break;
	case DSP_REG_YX:
	  fprintf_fn (stream, "%c%c",
		      (rm & 2) ? 'x' : 'y',
		      (rm & 1) ? '1' : '0');
	  break;
	default:
	  abort ();
	}
      if (n == 0)
	fprintf_fn (stream, ",");
    }
}

/* Print a double data transfer insn.  INSN is just the lower three
   nibbles of the insn, i.e. field a and the bit that indicates if
   a parallel processing insn follows.
   Return nonzero if a field b of a parallel processing insns follows.  */

static void
print_insn_ddt (insn, info)
     int insn;
     struct disassemble_info *info;
{
  fprintf_ftype fprintf_fn = info->fprintf_func;
  void *stream = info->stream;

  /* If this is just a nop, make sure to emit something.  */
  if (insn == 0x000)
    fprintf_fn (stream, "nopx\tnopy");

  /* If a parallel processing insn was printed before,
     and we got a non-nop, emit a tab.  */
  if ((ins