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Rework self modifying code handling.

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Code blocks now have a varying level of granularity in the page and dirty masks.
Most blocks have 64-byte granularity, but blocks that are repeatedly modified
drop to 1-byte granularity. This reduces the maximum size of the affected block
significantly, but reduces recompilation due to data located too close to code.

If the block is still marked as dirty, then it is recompiled without any
immediate instruction parameters being baked into the recompiled code, instead
being fetched from the RAM array as needed. This severely reduces recompilation
rates on some SMC-heavy games, eg Duke Nukem 3D, System Shock, Screamer etc,
giving a major speedup.
This commit is contained in:
SarahW 2019-03-16 14:53:26 +00:00
commit ab124776a0
36 changed files with 1719 additions and 233 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/codegen_ir_defs.h
View file

@ -76,6 +76,12 @@
#define UOP_MOV_INT_DOUBLE (UOP_TYPE_PARAMS_REGS | 0x26)
/*UOP_MOV_INT_DOUBLE_64 - dest_reg = (int)src_reg_a. New rounding control in src_reg_b, old rounding control in src_reg_c*/
#define UOP_MOV_INT_DOUBLE_64 (UOP_TYPE_PARAMS_REGS | 0x27)
/*UOP_MOV_REG_PTR - dest_reg = *p*/
#define UOP_MOV_REG_PTR (UOP_TYPE_PARAMS_REGS | UOP_TYPE_PARAMS_POINTER | 0x28)
/*UOP_MOVZX_REG_PTR_8 - dest_reg = *(uint8_t *)p*/
#define UOP_MOVZX_REG_PTR_8 (UOP_TYPE_PARAMS_REGS | UOP_TYPE_PARAMS_POINTER | 0x29)
/*UOP_MOVZX_REG_PTR_16 - dest_reg = *(uint16_t *)p*/
#define UOP_MOVZX_REG_PTR_16 (UOP_TYPE_PARAMS_REGS | UOP_TYPE_PARAMS_POINTER | 0x2a)
/*UOP_ADD - dest_reg = src_reg_a + src_reg_b*/
#define UOP_ADD (UOP_TYPE_PARAMS_REGS | 0x30)
/*UOP_ADD_IMM - dest_reg = src_reg_a + immediate*/
@ -338,6 +344,7 @@ typedef struct ir_data_t
{
uop_t uops[UOP_NR_MAX];
int wr_pos;
struct codeblock_t *block;
} ir_data_t;
static inline uop_t *uop_alloc(ir_data_t *ir, uint32_t uop_type)
@ -667,6 +674,9 @@ static inline void uop_gen_reg_src2_pointer(uint32_t uop_type, ir_data_t *ir, in
#define uop_MOV(ir, dst_reg, src_reg) uop_gen_reg_dst_src1(UOP_MOV, ir, dst_reg, src_reg)
#define uop_MOV_IMM(ir, reg, imm) uop_gen_reg_dst_imm(UOP_MOV_IMM, ir, reg, imm)
#define uop_MOV_PTR(ir, reg, p) uop_gen_reg_dst_pointer(UOP_MOV_PTR, ir, reg, p)
#define uop_MOV_REG_PTR(ir, reg, p) uop_gen_reg_dst_pointer(UOP_MOV_REG_PTR, ir, reg, p)
#define uop_MOVZX_REG_PTR_8(ir, reg, p) uop_gen_reg_dst_pointer(UOP_MOVZX_REG_PTR_8, ir, reg, p)
#define uop_MOVZX_REG_PTR_16(ir, reg, p) uop_gen_reg_dst_pointer(UOP_MOVZX_REG_PTR_16, ir, reg, p)
#define uop_MOVSX(ir, dst_reg, src_reg) uop_gen_reg_dst_src1(UOP_MOVSX, ir, dst_reg, src_reg)
#define uop_MOVZX(ir, dst_reg, src_reg) uop_gen_reg_dst_src1(UOP_MOVZX, ir, dst_reg, src_reg)
#define uop_MOV_DOUBLE_INT(ir, dst_reg, src_reg) uop_gen_reg_dst_src1(UOP_MOV_DOUBLE_INT, ir, dst_reg, src_reg)