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Added basic loop unrolling. Blocks that end in a JMP, LOOP or conditional branch to a previous instruction in the block will be unrolled up to 10 times.

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This commit is contained in:
SarahW 2019-03-25 19:07:51 +00:00
commit 7e099c277e
9 changed files with 594 additions and 148 deletions
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15
src/codegen_ops_jump.c
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@ -16,9 +16,10 @@ uint32_t ropJMP_r8(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t f
if (!(op_32 & 0x100))
dest_addr &= 0xffff;
uop_MOV_IMM(ir, IREG_pc, dest_addr);
if (offset < 0)
codegen_can_unroll(block, ir, op_pc+1, dest_addr);
codegen_mark_code_present(block, cs+op_pc, 1);
return -1;
return dest_addr;
}
uint32_t ropJMP_r16(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
@ -27,18 +28,20 @@ uint32_t ropJMP_r16(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t
dest_addr &= 0xffff;
uop_MOV_IMM(ir, IREG_pc, dest_addr);
if (offset < 0)
codegen_can_unroll(block, ir, op_pc+1, dest_addr);
codegen_mark_code_present(block, cs+op_pc, 2);
return -1;
return dest_addr;
}
uint32_t ropJMP_r32(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)
{
uint32_t offset = fastreadl(cs + op_pc);
uint32_t dest_addr = op_pc+4+offset;
uop_MOV_IMM(ir, IREG_pc, dest_addr);
if (offset < 0)
codegen_can_unroll(block, ir, op_pc+1, dest_addr);
codegen_mark_code_present(block, cs+op_pc, 4);
return -1;
return dest_addr;
}
uint32_t ropJMP_far_16(codeblock_t *block, ir_data_t *ir, uint8_t opcode, uint32_t fetchdat, uint32_t op_32, uint32_t op_pc)