all repos — mgba @ fc132b4d938f8d19936b9d93863f1d3eab8234ce

mGBA Game Boy Advance Emulator

Some instructions can write to pc directly
Jeffrey Pfau jeffrey@endrift.com
Sat, 02 Nov 2013 17:07:58 -0700
commit

fc132b4d938f8d19936b9d93863f1d3eab8234ce

parent

01d4672f560d734065b4ac2d412917cee47b85ae

1 files changed, 2 insertions(+), 0 deletions(-)

jump to
M src/arm/decoder-thumb.c → src/arm/decoder-thumb.c 
@@ -139,6 +139,7 @@ DEFINE_THUMB_DECODER(NAME, MNEMONIC, \
 		info->op1.reg = (opcode & 0x0007) | H1; \
 		info->op2.reg = ((opcode >> 3) & 0x0007) | H2; \
 		info->accessesSpecialRegisters = info->op1.reg > 12 || info->op2.reg > 12; \
+		info->branches = info->op1.reg == ARM_PC; \
 		info->affectsCPSR = CPSR; \
 		info->operandFormat = ARM_OPERAND_REGISTER_1 | \
 			AFFECTED | \

@@ -224,6 +225,7 @@ DEFINE_THUMB_DECODER(NAME, MNEMONIC, \
 		info->memory.baseReg = RN; \
 		info->accessesSpecialRegisters = SPECIAL_REG; \
 		info->op1.immediate = (opcode & 0xFF) | ADDITIONAL_REG; \
+		info->branches = info->op1.immediate & (1 << ARM_PC); \
 		info->operandFormat = ARM_OPERAND_MEMORY_1; \
 		info->memory.format = ARM_MEMORY_REGISTER_BASE | \
 			ARM_MEMORY_POST_INCREMENT;)