diff options
Diffstat (limited to 'opcodes/rx-decode.opc')
| -rw-r--r-- | opcodes/rx-decode.opc | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/opcodes/rx-decode.opc b/opcodes/rx-decode.opc index 2409f7f..12f6893 100644 --- a/opcodes/rx-decode.opc +++ b/opcodes/rx-decode.opc @@ -310,7 +310,7 @@ rx_decode_opcode (unsigned long pc AU, if (sd == 3 && ss == 3 && sz == 2 && rsrc == 0 && rdst == 0) { ID(nop2); - rx->syntax = "nop"; + SYNTAX ("nop\t; mov.l\tr0, r0"); } else { @@ -567,13 +567,23 @@ rx_decode_opcode (unsigned long pc AU, /* MAX */ /** 1111 1101 0111 im00 0100rdst max #%1, %0 */ - ID(max); DR(rdst); SC(IMMex(im)); + int val = IMMex (im); + if (im == 0 && (unsigned) val == 0x80000000 && rdst == 0) + { + ID (nop7); + SYNTAX("nop\t; max\t#0x80000000, r0"); + } + else + { + ID(max); + } + DR(rdst); SC(val); /** 1111 1100 0001 00ss rsrc rdst max %1%S1, %0 */ if (ss == 3 && rsrc == 0 && rdst == 0) { ID(nop3); - rx->syntax = "nop"; + SYNTAX("nop\t; max\tr0, r0"); } else { @@ -599,10 +609,38 @@ rx_decode_opcode (unsigned long pc AU, /* MUL */ /** 0110 0011 immm rdst mul #%1, %0 */ - ID(mul); DR(rdst); SC(immm); F_____; + if (immm == 1 && rdst == 0) + { + ID(nop2); + SYNTAX ("nop\t; mul\t#1, r0"); + } + else + { + ID(mul); + } + DR(rdst); SC(immm); F_____; /** 0111 01im 0001rdst mul #%1, %0 */ - ID(mul); DR(rdst); SC(IMMex(im)); F_____; + int val = IMMex(im); + if (val == 1 && rdst == 0) + { + SYNTAX("nop\t; mul\t#1, r0"); + switch (im) + { + case 2: ID(nop4); break; + case 3: ID(nop5); break; + case 0: ID(nop6); break; + default: + ID(mul); + SYNTAX("mul #%1, %0"); + break; + } + } + else + { + ID(mul); + } + DR(rdst); SC(val); F_____; /** 0100 11ss rsrc rdst mul %1%S1, %0 */ ID(mul); SP(ss, rsrc); DR(rdst); F_____; |