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LR35902: Increment double-wide adds

This commit is contained in:
Jeffrey Pfau 2016-01-17 03:04:10 -08:00
parent 7a104c07a7
commit 4271d89129
3 changed files with 25 additions and 6 deletions
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8
src/lr35902/emitter-lr35902.h
View File

@ -19,7 +19,7 @@
DECLARE_INSTRUCTION_LR35902(EMITTER, LDB_), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, ADDHL_BC), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDA_BC), \
DECLARE_INSTRUCTION_LR35902(EMITTER, DECBC), \
DECLARE_INSTRUCTION_LR35902(EMITTER, INCC), \
@ -35,7 +35,7 @@
DECLARE_INSTRUCTION_LR35902(EMITTER, LDD_), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, JR), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, ADDHL_DE), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDA_DE), \
DECLARE_INSTRUCTION_LR35902(EMITTER, DECDE), \
DECLARE_INSTRUCTION_LR35902(EMITTER, INCE), \
@ -51,7 +51,7 @@
DECLARE_INSTRUCTION_LR35902(EMITTER, LDH_), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, JRZ), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, ADDHL_HL), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDA_IHL), \
DECLARE_INSTRUCTION_LR35902(EMITTER, DECHL), \
DECLARE_INSTRUCTION_LR35902(EMITTER, INCL), \
@ -67,7 +67,7 @@
DECLARE_INSTRUCTION_LR35902(EMITTER, LDHL_), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, JRC), \
DECLARE_INSTRUCTION_LR35902(EMITTER, STUB), \
DECLARE_INSTRUCTION_LR35902(EMITTER, ADDHL_SP), \
DECLARE_INSTRUCTION_LR35902(EMITTER, LDA_DHL), \
DECLARE_INSTRUCTION_LR35902(EMITTER, DECSP), \
DECLARE_INSTRUCTION_LR35902(EMITTER, INCA), \

20
src/lr35902/isa-lr35902.c
View File

@ -435,6 +435,25 @@ DEFINE_INCDEC_WIDE_INSTRUCTION_LR35902(BC);
DEFINE_INCDEC_WIDE_INSTRUCTION_LR35902(DE);
DEFINE_INCDEC_WIDE_INSTRUCTION_LR35902(HL);
#define DEFINE_ADD_HL_INSTRUCTION_LR35902(REG, L, H) \
DEFINE_INSTRUCTION_LR35902(ADDHL_ ## REG ## Finish, \
int diff = H + cpu->h + cpu->f.c; \
cpu->h = diff; \
cpu->f.c = diff >= 0x100; \
cpu->f.n = 0; \
/* TODO: Find explanation of H flag */) \
DEFINE_INSTRUCTION_LR35902(ADDHL_ ## REG, \
int diff = L + cpu->l; \
cpu->l = diff; \
cpu->f.c = diff >= 0x100; \
cpu->executionState = LR35902_CORE_STALL; \
cpu->instruction = _LR35902InstructionADDHL_ ## REG ## Finish;)
DEFINE_ADD_HL_INSTRUCTION_LR35902(BC, cpu->c, cpu->b);
DEFINE_ADD_HL_INSTRUCTION_LR35902(DE, cpu->e, cpu->d);
DEFINE_ADD_HL_INSTRUCTION_LR35902(HL, cpu->l, cpu->h);
DEFINE_ADD_HL_INSTRUCTION_LR35902(SP, (cpu->sp & 0xFF), (cpu->sp >> 8));
#define DEFINE_INC_INSTRUCTION_LR35902(NAME, OPERAND) \
DEFINE_INSTRUCTION_LR35902(INC ## NAME, \
@ -505,7 +524,6 @@ DEFINE_INSTRUCTION_LR35902(DECSP,
cpu->instruction = _LR35902InstructionPOP ## REG ## Delay; \
cpu->executionState = LR35902_CORE_MEMORY_LOAD;) \
DEFINE_INSTRUCTION_LR35902(PUSH ## REG ## Finish, \
cpu->instruction = _LR35902InstructionNOP; \
cpu->executionState = LR35902_CORE_STALL;) \
DEFINE_INSTRUCTION_LR35902(PUSH ## REG ## Delay, \
--cpu->sp; \

3
src/lr35902/lr35902.h
View File

@ -43,7 +43,8 @@ enum LR35902ExecutionState {
LR35902_CORE_MEMORY_LOAD = 4,
LR35902_CORE_MEMORY_STORE = 8,
LR35902_CORE_READ_PC = 12,
LR35902_CORE_STALL = 16
LR35902_CORE_STALL = 16,
LR35902_CORE_OP2 = 20
};
struct LR35902Memory {