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LR35902: Implement LD SP, HL and LD HL, SP+r8

This commit is contained in:
Jeffrey Pfau 2016-01-20 20:09:34 -08:00
parent 06e0908642
commit cbad932f45
2 changed files with 19 additions and 2 deletions
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4
src/lr35902/emitter-lr35902.h
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@ -258,8 +258,8 @@
DECLARE_INSTRUCTION_LR35902(EMITTER, PUSHAF), \
DECLARE_INSTRUCTION_LR35902(EMITTER, OR), \
DECLARE_INSTRUCTION_LR35902(EMITTER, RST30), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDHL_SP), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDSP_HL), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDAI), \
DECLARE_INSTRUCTION_LR35902(EMITTER, EI), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \

17
src/lr35902/isa-lr35902.c
View File

@ -214,6 +214,23 @@ DEFINE_INSTRUCTION_LR35902(LDHL_, \
cpu->executionState = LR35902_CORE_READ_PC; \
cpu->instruction = _LR35902InstructionLDHL_Bus;)
DEFINE_INSTRUCTION_LR35902(LDHL_SPDelay,
int diff = cpu->sp + (int8_t) cpu->bus;
LR35902WriteHL(cpu, diff);
cpu->executionState = LR35902_CORE_STALL;
cpu->f.z = 0;
cpu->f.n = 0;
cpu->f.c = !!(diff & 0xFFFF0000);
/* Figure out h flag*/)
DEFINE_INSTRUCTION_LR35902(LDHL_SP,
cpu->executionState = LR35902_CORE_READ_PC;
cpu->instruction = _LR35902InstructionLDHL_SPDelay;)
DEFINE_INSTRUCTION_LR35902(LDSP_HL,
cpu->sp = LR35902ReadHL(cpu);
cpu->executionState = LR35902_CORE_STALL;)
#define DEFINE_ALU_INSTRUCTION_LR35902_MEM(NAME, REG) \
DEFINE_INSTRUCTION_LR35902(NAME ## REG, \
cpu->executionState = LR35902_CORE_MEMORY_LOAD; \