Changed some wrong comments from my last commit and document some more

opcodes.

diff --git a/sys/i386/i386/math_emulate.c b/sys/i386/i386/math_emulate.c
index 1b15e61..0e7349c 100644 (file)
--- a/sys/i386/i386/math_emulate.c
+++ b/sys/i386/i386/math_emulate.c
@@ -6,7 +6,7 @@
  * [expediant "port" of linux 8087 emulator to 386BSD, with apologies -wfj]
  *
  *     from: 386BSD 0.1
  * [expediant "port" of linux 8087 emulator to 386BSD, with apologies -wfj]
  *
  *     from: 386BSD 0.1

- *     $Id: math_emulate.c,v 1.7 1994/01/29 22:07:16 nate Exp $
+ *     $Id: math_emulate.c,v 1.8 1994/04/26 22:51:48 ats Exp $

  */
 
 /*
  */
 
 /*


@@ -107,7 +107,7 @@ math_emulate(struct trapframe * info)
        switch (code) {
                case 0x1d0: /* fnop */
                        return(0);
        switch (code) {
                case 0x1d0: /* fnop */
                        return(0);

-               case 0x1d1: case 0x1d2: case 0x1d3:
+               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 */
                case 0x1d4: case 0x1d5: case 0x1d6: case 0x1d7:
                        math_abort(info,SIGILL);
                case 0x1e0: /* fchs */


@@ -118,13 +118,13 @@ math_emulate(struct trapframe * info)
                        return(0);
                case 0x1e2: case 0x1e3:
                        math_abort(info,SIGILL);
                        return(0);
                case 0x1e2: case 0x1e3:
                        math_abort(info,SIGILL);

-               case 0x1e4: /* fxtract */
-                       ftst(PST(0));   /* ?????? */
+               case 0x1e4: /* ftst */
+                       ftst(PST(0));

                        return(0);
                case 0x1e5: /* fxam */
                        printf("fxam not implemented\n\r");
                        math_abort(info,SIGILL);
                        return(0);
                case 0x1e5: /* fxam */
                        printf("fxam not implemented\n\r");
                        math_abort(info,SIGILL);

-               case 0x1e6: case 0x1e7:
+               case 0x1e6: case 0x1e7: /* fldenv */

                        math_abort(info,SIGILL);
                case 0x1e8: /* fld1 */
                        fpush();
                        math_abort(info,SIGILL);
                case 0x1e8: /* fld1 */
                        fpush();


@@ -156,10 +156,20 @@ math_emulate(struct trapframe * info)
                        return(0);
                case 0x1ef:
                        math_abort(info,SIGILL);
                        return(0);
                case 0x1ef:
                        math_abort(info,SIGILL);

-               case 0x1f0: case 0x1f1: case 0x1f2: case 0x1f3:
-               case 0x1f4: case 0x1f5: case 0x1f6: case 0x1f7:
-               case 0x1f8: case 0x1f9: case 0x1fa: case 0x1fb:
-               case 0x1fe: case 0x1ff:
+               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);
                        uprintf(
                         "math_emulate: instruction %04x not implemented\n",
                          code + 0xd800);