diff options
Diffstat (limited to 'src/assembler_ops.py')
| -rw-r--r-- | src/assembler_ops.py | 56 |
1 files changed, 27 insertions, 29 deletions
diff --git a/src/assembler_ops.py b/src/assembler_ops.py index 0177140..2313bfd 100644 --- a/src/assembler_ops.py +++ b/src/assembler_ops.py @@ -3,16 +3,21 @@ from assembler_eval import * from dataclasses import dataclass @dataclass +class Options: + stack_pointer = "RG" + csr_scratch = "RF" + +@dataclass class Meta: address: int - options: dict[str, str] + options: Options def make_alr(meta: Meta, alu_op: str, left: str, right: str, target: str) -> list[int]: """ALR 0000 TTTL LLRR RSSS""" - target_e = eval_expr(target) - left_e = eval_expr(left) - right_e = eval_expr(right) - alu_op_e = eval_expr(alu_op) + target_e = eval_expr(target, bits=3) + left_e = eval_expr(left, bits=3) + right_e = eval_expr(right, bits=3) + alu_op_e = eval_expr(alu_op, bits=3) word = (0b0000 << 12) + \ (target_e << 9) + \ (left_e << 6) + \ @@ -22,12 +27,10 @@ def make_alr(meta: Meta, alu_op: str, left: str, right: str, target: str) -> lis def make_ali(meta: Meta, alu_op: str, left: str, imm: str, target: str) -> list[int]: """ALI 0001 TTTL LLII ISSS""" - target_e = eval_expr(target) - left_e = eval_expr(left) - imm_e = eval_expr(imm) - if imm_e >= 2**3: - raise Exception("ALI immediate value does not fit in 3 bits: " + str(imm_e)) - alu_op_e = eval_expr(alu_op) + target_e = eval_expr(target, bits=3) + left_e = eval_expr(left, bits=3) + imm_e = eval_expr(imm, bits=3) + alu_op_e = eval_expr(alu_op, bits=3) word = (0b0001 << 12) + \ (target_e << 9) + \ (left_e << 6) + \ @@ -37,8 +40,8 @@ def make_ali(meta: Meta, alu_op: str, left: str, imm: str, target: str) -> list[ def make_ldr(meta: Meta, to_reg: str, addr_reg: str) -> list[int]: """LDR 0010 TTTR RRXX XXXX""" - to_reg_e = eval_expr(to_reg) - addr_reg_e = eval_expr(addr_reg) + to_reg_e = eval_expr(to_reg, bits=3) + addr_reg_e = eval_expr(addr_reg, bits=3) word = (0b0010 << 12) + \ (to_reg_e << 9) + \ (addr_reg_e << 6) @@ -46,8 +49,8 @@ def make_ldr(meta: Meta, to_reg: str, addr_reg: str) -> list[int]: def make_str(meta: Meta, from_reg: str, addr_reg: str) -> list[int]: """STR 0011 TTTR RRXX XXXX""" - from_reg_e = eval_expr(from_reg) - addr_reg_e = eval_expr(addr_reg) + from_reg_e = eval_expr(from_reg, bits=3) + addr_reg_e = eval_expr(addr_reg, bits=3) word = (0b0011 << 12) + \ (from_reg_e << 9) + \ (addr_reg_e << 6) @@ -55,8 +58,8 @@ def make_str(meta: Meta, from_reg: str, addr_reg: str) -> list[int]: def make_ldi(meta: Meta, to_reg: str, imm: str) -> list[int]: """LDI 0100 TTTI IIII IIII""" - to_reg_e = eval_expr(to_reg) - imm_e = eval_expr(imm) + to_reg_e = eval_expr(to_reg, bits=3) + imm_e = eval_expr(imm, bits=9) word = (0b0100 << 12) + \ (to_reg_e << 9) + \ imm_e @@ -64,26 +67,23 @@ def make_ldi(meta: Meta, to_reg: str, imm: str) -> list[int]: def make_jpr(meta: Meta, addr_reg: str) -> list[int]: """JPR 0101 XXXR RRXX XXXX""" - addr_reg_e = eval_expr(addr_reg) + addr_reg_e = eval_expr(addr_reg, bits=3) word = (0b0101 << 12) + \ (addr_reg_e << 6) return [word] def make_jpi(meta: Meta, imm: str) -> list[int]: """JPI 0110 XXXI IIII IIII""" - imm_e = eval_expr(imm) + imm_e = eval_expr(imm, bits=9) imm_e = imm_e - meta.address - 1 - if imm_e >= 2**9: - raise Exception("JPI relative value does not fit in 9 bits: " + str(imm_e)) - word = (0b0110 << 12) + \ imm_e return [word] def make_brr(meta: Meta, flag_s: str, addr_reg: str) -> list[int]: """brr 0111 XFFR RRXX XXXX""" - flag_s_e = eval_expr(flag_s) - addr_reg_e = eval_expr(addr_reg) + flag_s_e = eval_expr(flag_s, bits=2) + addr_reg_e = eval_expr(addr_reg, bits=3) word = (0b0111 << 12) + \ (flag_s_e << 9) + \ (addr_reg_e << 6) @@ -91,11 +91,9 @@ def make_brr(meta: Meta, flag_s: str, addr_reg: str) -> list[int]: def make_bri(meta: Meta, flag_s: str, imm: str) -> list[int]: """BRI 1000 XFFI IIII IIII""" - flag_s_e = eval_expr(flag_s) - imm_e = eval_expr(imm) + flag_s_e = eval_expr(flag_s, bits=2) + imm_e = eval_expr(imm, bits=9) imm_e = imm_e - meta.address - 1 - if imm_e >= 2**9: - raise Exception("BRI relative value does not fit in 9 bits: " + str(imm_e)) word = (0b1000 << 12) + \ (flag_s_e << 9) + \ imm_e @@ -103,7 +101,7 @@ def make_bri(meta: Meta, flag_s: str, imm: str) -> list[int]: def make_lpc(meta: Meta, target: str) -> list[int]: """LPC 1001 TTTX XXXX XXXX""" - target_e = eval_expr(target) + target_e = eval_expr(target, bits=3) word = (0b1001 << 12) + \ (target_e << 9) return [word] |