static void do_emu(struct info * info) { unsigned short code; temp_real tmp; char * address; if (I387.cwd & I387.swd & 0x3f) I387.swd |= 0x8000; else I387.swd &= 0x7fff; ORIG_EIP = EIP; /* 0x0007 means user code space */ if (CS != 0x000F) { printk("math_emulate: %04x:%08x\n\r",CS,EIP); panic("Math emulation needed in kernel"); } code = get_fs_word((unsigned short *) EIP); bswapw(code); code &= 0x7ff; I387.fip = EIP; *(unsigned short *) &I387.fcs = CS; *(1+(unsigned short *) &I387.fcs) = code; EIP += 2; switch (code) { case 0x1d0: /* fnop */ return; case 0x1d1: case 0x1d2: case 0x1d3: case 0x1d4: case 0x1d5: case 0x1d6: case 0x1d7: math_abort(info,SIGILL); case 0x1e0: ST(0).exponent ^= 0x8000; return; case 0x1e1: ST(0).exponent &= 0x7fff; return; case 0x1e2: case 0x1e3: math_abort(info,SIGILL); case 0x1e4: ftst(PST(0)); return; case 0x1e5: printk("fxam not implemented\n\r"); math_abort(info,SIGILL); case 0x1e6: case 0x1e7: math_abort(info,SIGILL); case 0x1e8: fpush(); ST(0) = CONST1; return; case 0x1e9: fpush(); ST(0) = CONSTL2T; return; case 0x1ea: fpush(); ST(0) = CONSTL2E; return; case 0x1eb: fpush(); ST(0) = CONSTPI; return; case 0x1ec: fpush(); ST(0) = CONSTLG2; return; case 0x1ed: fpush(); ST(0) = CONSTLN2; return; case 0x1ee: fpush(); ST(0) = CONSTZ; return; case 0x1ef: math_abort(info,SIGILL); case 0x1fa: fsqrt(PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x1f0: case 0x1f1: case 0x1f2: case 0x1f3: case 0x1f4: case 0x1f5: case 0x1f6: case 0x1f7: case 0x1f8: case 0x1f9: case 0x1fb: case 0x1fd: case 0x1fe: case 0x1ff: printk("%04x fxxx not implemented\n\r",code + 0xd800); math_abort(info,SIGILL); case 0x1fc: frndint(PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x2e9: fucom(PST(1),PST(0)); fpop(); fpop(); return; case 0x3d0: case 0x3d1: return; case 0x3e2: I387.swd &= 0x7f00; return; case 0x3e3: I387.cwd = 0x037f; I387.swd = 0x0000; I387.twd = 0x0000; return; case 0x3e4: return; case 0x6d9: fcom(PST(1),PST(0)); fpop(); fpop(); return; case 0x7e0: *(short *) &EAX = I387.swd; return; } switch (code >> 3) { case 0x18: fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x19: fmul(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x1a: fcom(PST(code & 7),PST(0)); return; case 0x1b: fcom(PST(code & 7),PST(0)); fpop(); return; case 0x1c: real_to_real(&ST(code & 7),&tmp); tmp.exponent ^= 0x8000; fadd(PST(0),&tmp,&tmp); real_to_real(&tmp,&ST(0)); return; case 0x1d: ST(0).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x1e: fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x1f: fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 0x38: fpush(); ST(0) = ST((code+1) & 7); return; case 0x39: fxchg(&ST(0),&ST(code & 7)); return; case 0x3b: ST(code & 7) = ST(0); fpop(); return; case 0x98: fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0x99: fmul(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0x9a: fcom(PST(code & 7),PST(0)); return; case 0x9b: fcom(PST(code & 7),PST(0)); fpop(); return; case 0x9c: ST(code & 7).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0x9d: real_to_real(&ST(0),&tmp); tmp.exponent ^= 0x8000; fadd(PST(code & 7),&tmp,&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0x9e: fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0x9f: fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); return; case 0xb8: printk("ffree not implemented\n\r"); math_abort(info,SIGILL); case 0xb9: fxchg(&ST(0),&ST(code & 7)); return; case 0xba: ST(code & 7) = ST(0); return; case 0xbb: ST(code & 7) = ST(0); fpop(); return; case 0xbc: fucom(PST(code & 7),PST(0)); return; case 0xbd: fucom(PST(code & 7),PST(0)); fpop(); return; case 0xd8: fadd(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xd9: fmul(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xda: fcom(PST(code & 7),PST(0)); fpop(); return; case 0xdc: ST(code & 7).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xdd: real_to_real(&ST(0),&tmp); tmp.exponent ^= 0x8000; fadd(PST(code & 7),&tmp,&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xde: fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xdf: fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return; case 0xf8: printk("ffree not implemented\n\r"); math_abort(info,SIGILL); fpop(); return; case 0xf9: fxchg(&ST(0),&ST(code & 7)); return; case 0xfa: case 0xfb: ST(code & 7) = ST(0); fpop(); return; } switch ((code>>3) & 0xe7) { case 0x22: put_short_real(PST(0),info,code); return; case 0x23: put_short_real(PST(0),info,code); fpop(); return; case 0x24: address = ea(info,code); for (code = 0 ; code < 7 ; code++) { ((long *) & I387)[code] = get_fs_long((unsigned long *) address); address += 4; } return; case 0x25: address = ea(info,code); *(unsigned short *) &I387.cwd = get_fs_word((unsigned short *) address); return; case 0x26: address = ea(info,code); verify_area(address,28); for (code = 0 ; code < 7 ; code++) { put_fs_long( ((long *) & I387)[code], (unsigned long *) address); address += 4; } return; case 0x27: address = ea(info,code); verify_area(address,2); put_fs_word(I387.cwd,(short *) address); return; case 0x62: put_long_int(PST(0),info,code); return; case 0x63: put_long_int(PST(0),info,code); fpop(); return; case 0x65: fpush(); get_temp_real(&tmp,info,code); real_to_real(&tmp,&ST(0)); return; case 0x67: put_temp_real(PST(0),info,code); fpop(); return; case 0xa2: put_long_real(PST(0),info,code); return; case 0xa3: put_long_real(PST(0),info,code); fpop(); return; case 0xa4: address = ea(info,code); for (code = 0 ; code < 27 ; code++) { ((long *) & I387)[code] = get_fs_long((unsigned long *) address); address += 4; } return; case 0xa6: address = ea(info,code); verify_area(address,108); for (code = 0 ; code < 27 ; code++) { put_fs_long( ((long *) & I387)[code], (unsigned long *) address); address += 4; } I387.cwd = 0x037f; I387.swd = 0x0000; I387.twd = 0x0000; return; case 0xa7: address = ea(info,code); verify_area(address,2); put_fs_word(I387.swd,(short *) address); return; case 0xe2: put_short_int(PST(0),info,code); return; case 0xe3: put_short_int(PST(0),info,code); fpop(); return; case 0xe4: fpush(); get_BCD(&tmp,info,code); real_to_real(&tmp,&ST(0)); return; case 0xe5: fpush(); get_longlong_int(&tmp,info,code); real_to_real(&tmp,&ST(0)); return; case 0xe6: put_BCD(PST(0),info,code); fpop(); return; case 0xe7: put_longlong_int(PST(0),info,code); fpop(); return; } switch (code >> 9) { case 0: get_short_real(&tmp,info,code); break; case 1: get_long_int(&tmp,info,code); break; case 2: get_long_real(&tmp,info,code); break; case 4: get_short_int(&tmp,info,code); } switch ((code>>3) & 0x27) { case 0: fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 1: fmul(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 2: fcom(&tmp,PST(0)); return; case 3: fcom(&tmp,PST(0)); fpop(); return; case 4: tmp.exponent ^= 0x8000; fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 5: ST(0).exponent ^= 0x8000; fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; case 6: fdiv(PST(0),&tmp,&tmp); real_to_real(&tmp,&ST(0)); return; case 7: fdiv(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return; } if ((code & 0x138) == 0x100) { fpush(); real_to_real(&tmp,&ST(0)); return; } printk("Unknown math-insns: %04x:%08x %04x\n\r",CS,EIP,code); math_abort(info,SIGFPE); }
static int math_emulate(struct trapframe * info) { unsigned short code; temp_real tmp; char * address; u_long oldeip; /* ever used fp? */ if ((((struct pcb *)curproc->p_addr)->pcb_flags & FP_SOFTFP) == 0) { ((struct pcb *)curproc->p_addr)->pcb_flags |= FP_SOFTFP; I387.cwd = 0x037f; I387.swd = 0x0000; I387.twd = 0x0000; } if (I387.cwd & I387.swd & 0x3f) I387.swd |= 0x8000; else I387.swd &= 0x7fff; oldeip = info->tf_eip; /* 0x001f means user code space */ if ((u_short)info->tf_cs != 0x001F) { printf("math_emulate: %04x:%08lx\n", (u_short)info->tf_cs, oldeip); panic("?Math emulation needed in kernel?"); } code = get_fs_word((unsigned short *) oldeip); bswapw(code); code &= 0x7ff; I387.fip = oldeip; *(unsigned short *) &I387.fcs = (u_short) info->tf_cs; *(1+(unsigned short *) &I387.fcs) = code; info->tf_eip += 2; switch (code) { case 0x1d0: /* fnop */ return(0); case 0x1d1: case 0x1d2: case 0x1d3: /* fst to 32-bit mem */ case 0x1d4: case 0x1d5: case 0x1d6: case 0x1d7: math_abort(info,SIGILL); case 0x1e0: /* fchs */ ST(0).exponent ^= 0x8000; return(0); case 0x1e1: /* fabs */ ST(0).exponent &= 0x7fff; return(0); case 0x1e2: case 0x1e3: math_abort(info,SIGILL); case 0x1e4: /* ftst */ ftst(PST(0)); return(0); case 0x1e5: /* fxam */ printf("fxam not implemented\n"); math_abort(info,SIGILL); case 0x1e6: case 0x1e7: /* fldenv */ math_abort(info,SIGILL); case 0x1e8: /* fld1 */ fpush(); ST(0) = CONST1; return(0); case 0x1e9: /* fld2t */ fpush(); ST(0) = CONSTL2T; return(0); case 0x1ea: /* fld2e */ fpush(); ST(0) = CONSTL2E; return(0); case 0x1eb: /* fldpi */ fpush(); ST(0) = CONSTPI; return(0); case 0x1ec: /* fldlg2 */ fpush(); ST(0) = CONSTLG2; return(0); case 0x1ed: /* fldln2 */ fpush(); ST(0) = CONSTLN2; return(0); case 0x1ee: /* fldz */ fpush(); ST(0) = CONSTZ; return(0); case 0x1ef: math_abort(info,SIGILL); case 0x1f0: /* f2xm1 */ case 0x1f1: /* fyl2x */ case 0x1f2: /* fptan */ case 0x1f3: /* fpatan */ case 0x1f4: /* fxtract */ case 0x1f5: /* fprem1 */ case 0x1f6: /* fdecstp */ case 0x1f7: /* fincstp */ case 0x1f8: /* fprem */ case 0x1f9: /* fyl2xp1 */ case 0x1fa: /* fsqrt */ case 0x1fb: /* fsincos */ case 0x1fe: /* fsin */ case 0x1ff: /* fcos */ uprintf( "math_emulate: instruction %04x not implemented\n", code + 0xd800); math_abort(info,SIGILL); case 0x1fc: /* frndint */ frndint(PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x1fd: /* fscale */ /* incomplete and totally inadequate -wfj */ Fscale(PST(0), PST(1), &tmp); real_to_real(&tmp,&ST(0)); return(0); /* 19 Sep 92*/ case 0x2e9: /* ????? */ /* if this should be a fucomp ST(0),ST(1) , it must be a 0x3e9 ATS */ fucom(PST(1),PST(0)); fpop(); fpop(); return(0); case 0x3d0: case 0x3d1: /* fist ?? */ return(0); case 0x3e2: /* fclex */ I387.swd &= 0x7f00; return(0); case 0x3e3: /* fninit */ I387.cwd = 0x037f; I387.swd = 0x0000; I387.twd = 0x0000; return(0); case 0x3e4: return(0); case 0x6d9: /* fcompp */ fcom(PST(1),PST(0)); fpop(); fpop(); return(0); case 0x7e0: /* fstsw ax */ *(short *) &info->tf_eax = I387.swd; return(0); } switch (code >> 3) { case 0x18: /* fadd */ fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x19: /* fmul */ fmul(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x1a: /* fcom */ fcom(PST(code & 7),PST(0)); return(0); case 0x1b: /* fcomp */ fcom(PST(code & 7),PST(0)); fpop(); return(0); case 0x1c: /* fsubr */ real_to_real(&ST(code & 7),&tmp); tmp.exponent ^= 0x8000; fadd(PST(0),&tmp,&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x1d: /* fsub */ ST(0).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x1e: /* fdivr */ fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x1f: /* fdiv */ fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 0x38: /* fld */ fpush(); ST(0) = ST((code & 7)+1); /* why plus 1 ????? ATS */ return(0); case 0x39: /* fxch */ fxchg(&ST(0),&ST(code & 7)); return(0); case 0x3b: /* ??? ??? wrong ???? ATS */ ST(code & 7) = ST(0); fpop(); return(0); case 0x98: /* fadd */ fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0x99: /* fmul */ fmul(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0x9a: /* ???? , my manual don't list a direction bit for fcom , ??? ATS */ fcom(PST(code & 7),PST(0)); return(0); case 0x9b: /* same as above , ATS */ fcom(PST(code & 7),PST(0)); fpop(); return(0); case 0x9c: /* fsubr */ ST(code & 7).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0x9d: /* fsub */ real_to_real(&ST(0),&tmp); tmp.exponent ^= 0x8000; fadd(PST(code & 7),&tmp,&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0x9e: /* fdivr */ fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0x9f: /* fdiv */ fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); return(0); case 0xb8: /* ffree */ printf("ffree not implemented\n"); math_abort(info,SIGILL); case 0xb9: /* fstp ???? where is the pop ? ATS */ fxchg(&ST(0),&ST(code & 7)); return(0); case 0xba: /* fst */ ST(code & 7) = ST(0); return(0); case 0xbb: /* ????? encoding of fstp to mem ? ATS */ ST(code & 7) = ST(0); fpop(); return(0); case 0xbc: /* fucom */ fucom(PST(code & 7),PST(0)); return(0); case 0xbd: /* fucomp */ fucom(PST(code & 7),PST(0)); fpop(); return(0); case 0xd8: /* faddp */ fadd(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xd9: /* fmulp */ fmul(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xda: /* ??? encoding of ficom with 16 bit mem ? ATS */ fcom(PST(code & 7),PST(0)); fpop(); return(0); case 0xdc: /* fsubrp */ ST(code & 7).exponent ^= 0x8000; fadd(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xdd: /* fsubp */ real_to_real(&ST(0),&tmp); tmp.exponent ^= 0x8000; fadd(PST(code & 7),&tmp,&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xde: /* fdivrp */ fdiv(PST(0),PST(code & 7),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xdf: /* fdivp */ fdiv(PST(code & 7),PST(0),&tmp); real_to_real(&tmp,&ST(code & 7)); fpop(); return(0); case 0xf8: /* fild 16-bit mem ???? ATS */ printf("ffree not implemented\n"); math_abort(info,SIGILL); fpop(); return(0); case 0xf9: /* ????? ATS */ fxchg(&ST(0),&ST(code & 7)); return(0); case 0xfa: /* fist 16-bit mem ? ATS */ case 0xfb: /* fistp 16-bit mem ? ATS */ ST(code & 7) = ST(0); fpop(); return(0); } switch ((code>>3) & 0xe7) { case 0x22: put_short_real(PST(0),info,code); return(0); case 0x23: put_short_real(PST(0),info,code); fpop(); return(0); case 0x24: address = ea(info,code); for (code = 0 ; code < 7 ; code++) { ((long *) & I387)[code] = get_fs_long((unsigned long *) address); address += 4; } return(0); case 0x25: address = ea(info,code); *(unsigned short *) &I387.cwd = get_fs_word((unsigned short *) address); return(0); case 0x26: address = ea(info,code); /*verify_area(address,28);*/ for (code = 0 ; code < 7 ; code++) { put_fs_long( ((long *) & I387)[code], (unsigned long *) address); address += 4; } return(0); case 0x27: address = ea(info,code); /*verify_area(address,2);*/ put_fs_word(I387.cwd,(short *) address); return(0); case 0x62: put_long_int(PST(0),info,code); return(0); case 0x63: put_long_int(PST(0),info,code); fpop(); return(0); case 0x65: fpush(); get_temp_real(&tmp,info,code); real_to_real(&tmp,&ST(0)); return(0); case 0x67: put_temp_real(PST(0),info,code); fpop(); return(0); case 0xa2: put_long_real(PST(0),info,code); return(0); case 0xa3: put_long_real(PST(0),info,code); fpop(); return(0); case 0xa4: address = ea(info,code); for (code = 0 ; code < 27 ; code++) { ((long *) & I387)[code] = get_fs_long((unsigned long *) address); address += 4; } return(0); case 0xa6: address = ea(info,code); /*verify_area(address,108);*/ for (code = 0 ; code < 27 ; code++) { put_fs_long( ((long *) & I387)[code], (unsigned long *) address); address += 4; } I387.cwd = 0x037f; I387.swd = 0x0000; I387.twd = 0x0000; return(0); case 0xa7: address = ea(info,code); /*verify_area(address,2);*/ put_fs_word(I387.swd,(short *) address); return(0); case 0xe2: put_short_int(PST(0),info,code); return(0); case 0xe3: put_short_int(PST(0),info,code); fpop(); return(0); case 0xe4: fpush(); get_BCD(&tmp,info,code); real_to_real(&tmp,&ST(0)); return(0); case 0xe5: fpush(); get_longlong_int(&tmp,info,code); real_to_real(&tmp,&ST(0)); return(0); case 0xe6: put_BCD(PST(0),info,code); fpop(); return(0); case 0xe7: put_longlong_int(PST(0),info,code); fpop(); return(0); } switch (code >> 9) { case 0: get_short_real(&tmp,info,code); break; case 1: get_long_int(&tmp,info,code); break; case 2: get_long_real(&tmp,info,code); break; case 4: get_short_int(&tmp,info,code); } switch ((code>>3) & 0x27) { case 0: fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 1: fmul(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 2: fcom(&tmp,PST(0)); return(0); case 3: fcom(&tmp,PST(0)); fpop(); return(0); case 4: tmp.exponent ^= 0x8000; fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 5: ST(0).exponent ^= 0x8000; fadd(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); case 6: fdiv(PST(0),&tmp,&tmp); real_to_real(&tmp,&ST(0)); return(0); case 7: fdiv(&tmp,PST(0),&tmp); real_to_real(&tmp,&ST(0)); return(0); } if ((code & 0x138) == 0x100) { fpush(); real_to_real(&tmp,&ST(0)); return(0); } printf("Unknown math-insns: %04x:%08x %04x\n",(u_short)info->tf_cs, info->tf_eip,code); math_abort(info,SIGFPE); }