diff options
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/arm/dyncom/arm_dyncom_thumb.cpp | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/src/core/arm/dyncom/arm_dyncom_thumb.cpp b/src/core/arm/dyncom/arm_dyncom_thumb.cpp index 2fc8170be..83b532aac 100644 --- a/src/core/arm/dyncom/arm_dyncom_thumb.cpp +++ b/src/core/arm/dyncom/arm_dyncom_thumb.cpp @@ -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} |