diff options
Diffstat (limited to 'src/core/arm/dyncom/arm_dyncom_thumb.cpp')
| -rw-r--r-- | src/core/arm/dyncom/arm_dyncom_thumb.cpp | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_thumb.cpp b/src/core/arm/dyncom/arm_dyncom_thumb.cpp index 2860af37..29272fd5 100644 --- a/src/core/arm/dyncom/arm_dyncom_thumb.cpp +++ b/src/core/arm/dyncom/arm_dyncom_thumb.cpp @@ -12,15 +12,9 @@ // with the following Thumb instruction held in the high 16-bits. Passing in two Thumb instructions // allows easier simulation of the special dual BL instruction. -tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) { - tdstate valid = t_uninitialized; - u32 tinstr = instr; - - // The endian should be judge here - if((addr & 0x3) != 0) - tinstr = instr >> 16; - else - tinstr &= 0xFFFF; +ThumbDecodeStatus TranslateThumbInstruction(u32 addr, u32 instr, u32* ainstr, u32* inst_size) { + ThumbDecodeStatus valid = ThumbDecodeStatus::UNINITIALIZED; + u32 tinstr = GetThumbInstruction(instr, addr); *ainstr = 0xDEADC0DE; // Debugging to catch non updates @@ -357,21 +351,21 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) { else *ainstr |= (tinstr & 0x00FF); } else if ((tinstr & 0x0F00) != 0x0E00) - valid = t_branch; + valid = ThumbDecodeStatus::BRANCH; else // UNDEFINED : cc=1110(AL) uses different format - valid = t_undefined; + valid = ThumbDecodeStatus::UNDEFINED; break; case 28: // B - valid = t_branch; + valid = ThumbDecodeStatus::BRANCH; break; case 29: - if(tinstr & 0x1) - valid = t_undefined; + if (tinstr & 0x1) + valid = ThumbDecodeStatus::UNDEFINED; else - valid = t_branch; + valid = ThumbDecodeStatus::BRANCH; break; case 30: // BL instruction 1 @@ -380,7 +374,7 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) { // simulation simple (from the user perspective) we check if the following instruction is // the second half of this BL, and if it is we simulate it immediately - valid = t_branch; + valid = ThumbDecodeStatus::BRANCH; break; case 31: // BL instruction 2 @@ -389,7 +383,7 @@ tdstate thumb_translate(u32 addr, u32 instr, u32* ainstr, u32* inst_size) { // ever be matched with the fmt19 "BL instruction 1" instruction. However, we do allow the // simulation of it on its own, with undefined results if r14 is not suitably initialised. - valid = t_branch; + valid = ThumbDecodeStatus::BRANCH; break; } |