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Merge pull request #838 from lioncash/thumb 

arm_dyncom_thumb: Implement missing instructions.
This commit is contained in:
Lioncash 2015-05-31 22:19:31 -04:00
parent 0414ad20cb c00781a908
commit 1974da272d
1 changed files with 40 additions and 3 deletions
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43
src/core/arm/dyncom/arm_dyncom_thumb.cpp
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@ -274,9 +274,46 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) {
? 0xE24DDF00 // SUB
: 0xE28DDF00) // ADD
|(tinstr & 0x007F); // off7
} else if ((tinstr & 0x0F00) == 0x0e00)
*ainstr = 0xEF000000 | 0x180000; // base | BKPT mask
else {
} else if ((tinstr & 0x0F00) == 0x0e00) {
// BKPT
*ainstr = 0xEF000000 // base
| BITS(tinstr, 0, 3) // imm4 field;
| (BITS(tinstr, 4, 7) << 8); // beginning 4 bits of imm12
} else if ((tinstr & 0x0F00) == 0x0200) {
static const ARMword subset[4] = {
0xE6BF0070, // SXTH
0xE6AF0070, // SXTB
0xE6FF0070, // UXTH
0xE6EF0070, // UXTB
};
*ainstr = subset[BITS(tinstr, 6, 7)] // base
| (BITS(tinstr, 0, 2) << 12) // Rd
| BITS(tinstr, 3, 5); // Rm
} else if ((tinstr & 0x0F00) == 0x600) {
if (BIT(tinstr, 5) == 0) {
// SETEND
*ainstr = 0xF1010000 // base
| (BIT(tinstr, 3) << 9); // endian specifier
} else {
// CPS
*ainstr = 0xF1080000 // base
| (BIT(tinstr, 0) << 6) // fiq bit
| (BIT(tinstr, 1) << 7) // irq bit
| (BIT(tinstr, 2) << 8) // abort bit
| (BIT(tinstr, 4) << 18); // enable bit
}
} else if ((tinstr & 0x0F00) == 0x0a00) {
static const ARMword subset[3] = {
0xE6BF0F30, // REV
0xE6BF0FB0, // REV16
0xE6FF0FB0, // REVSH
};
*ainstr = subset[BITS(tinstr, 6, 7)] // base
| (BITS(tinstr, 0, 2) << 12) // Rd
| BITS(tinstr, 3, 5); // Rm
} else {
static const ARMword subset[4] = {
0xE92D0000, // STMDB sp!,{rlist}
0xE92D4000, // STMDB sp!,{rlist,lr}