add circuitpython code

1 files changed, 215 insertions, 0 deletions

diff --git a/circuitpython/py/asmx86.h b/circuitpython/py/asmx86.h
new file mode 100644
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--- /dev/null
+++ b/circuitpython/py/asmx86.h
@@ -0,0 +1,215 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_PY_ASMX86_H
+#define MICROPY_INCLUDED_PY_ASMX86_H
+
+#include "py/mpconfig.h"
+#include "py/misc.h"
+#include "py/asmbase.h"
+
+// x86 cdecl calling convention is:
+//  - args passed on the stack in reverse order
+//  - return value in EAX
+//  - caller cleans up the stack after a call
+//  - stack must be aligned to 16-byte boundary before all calls
+//  - EAX, ECX, EDX are caller-save
+//  - EBX, ESI, EDI, EBP, ESP, EIP are callee-save
+
+// In the functions below, argument order follows x86 docs and generally
+// the destination is the first argument.
+// NOTE: this is a change from the old convention used in this file and
+// some functions still use the old (reverse) convention.
+
+#define ASM_X86_REG_EAX (0)
+#define ASM_X86_REG_ECX (1)
+#define ASM_X86_REG_EDX (2)
+#define ASM_X86_REG_EBX (3)
+#define ASM_X86_REG_ESP (4)
+#define ASM_X86_REG_EBP (5)
+#define ASM_X86_REG_ESI (6)
+#define ASM_X86_REG_EDI (7)
+
+// x86 passes values on the stack, but the emitter is register based, so we need
+// to define registers that can temporarily hold the function arguments.  They
+// need to be defined here so that asm_x86_call_ind can push them onto the stack
+// before the call.
+#define ASM_X86_REG_ARG_1 ASM_X86_REG_EAX
+#define ASM_X86_REG_ARG_2 ASM_X86_REG_ECX
+#define ASM_X86_REG_ARG_3 ASM_X86_REG_EDX
+#define ASM_X86_REG_ARG_4 ASM_X86_REG_EBX
+
+// condition codes, used for jcc and setcc (despite their j-name!)
+#define ASM_X86_CC_JB  (0x2) // below, unsigned
+#define ASM_X86_CC_JAE (0x3) // above or equal, unsigned
+#define ASM_X86_CC_JZ  (0x4)
+#define ASM_X86_CC_JE  (0x4)
+#define ASM_X86_CC_JNZ (0x5)
+#define ASM_X86_CC_JNE (0x5)
+#define ASM_X86_CC_JBE (0x6) // below or equal, unsigned
+#define ASM_X86_CC_JA  (0x7) // above, unsigned
+#define ASM_X86_CC_JL  (0xc) // less, signed
+#define ASM_X86_CC_JGE (0xd) // greater or equal, signed
+#define ASM_X86_CC_JLE (0xe) // less or equal, signed
+#define ASM_X86_CC_JG  (0xf) // greater, signed
+
+typedef struct _asm_x86_t {
+    mp_asm_base_t base;
+    int num_locals;
+} asm_x86_t;
+
+static inline void asm_x86_end_pass(asm_x86_t *as) {
+    (void)as;
+}
+
+void asm_x86_mov_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+size_t asm_x86_mov_i32_to_r32(asm_x86_t *as, int32_t src_i32, int dest_r32);
+void asm_x86_mov_r8_to_mem8(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
+void asm_x86_mov_r16_to_mem16(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
+void asm_x86_mov_r32_to_mem32(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
+void asm_x86_mov_mem8_to_r32zx(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);
+void asm_x86_mov_mem16_to_r32zx(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);
+void asm_x86_mov_mem32_to_r32(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);
+void asm_x86_and_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_or_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_xor_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_shl_r32_cl(asm_x86_t *as, int dest_r32);
+void asm_x86_shr_r32_cl(asm_x86_t *as, int dest_r32);
+void asm_x86_sar_r32_cl(asm_x86_t *as, int dest_r32);
+void asm_x86_add_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_sub_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_mul_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
+void asm_x86_cmp_r32_with_r32(asm_x86_t *as, int src_r32_a, int src_r32_b);
+void asm_x86_test_r8_with_r8(asm_x86_t *as, int src_r32_a, int src_r32_b);
+void asm_x86_test_r32_with_r32(asm_x86_t *as, int src_r32_a, int src_r32_b);
+void asm_x86_setcc_r8(asm_x86_t *as, mp_uint_t jcc_type, int dest_r8);
+void asm_x86_jmp_reg(asm_x86_t *as, int src_r86);
+void asm_x86_jmp_label(asm_x86_t *as, mp_uint_t label);
+void asm_x86_jcc_label(asm_x86_t *as, mp_uint_t jcc_type, mp_uint_t label);
+void asm_x86_entry(asm_x86_t *as, int num_locals);
+void asm_x86_exit(asm_x86_t *as);
+void asm_x86_mov_arg_to_r32(asm_x86_t *as, int src_arg_num, int dest_r32);
+void asm_x86_mov_local_to_r32(asm_x86_t *as, int src_local_num, int dest_r32);
+void asm_x86_mov_r32_to_local(asm_x86_t *as, int src_r32, int dest_local_num);
+void asm_x86_mov_local_addr_to_r32(asm_x86_t *as, int local_num, int dest_r32);
+void asm_x86_mov_reg_pcrel(asm_x86_t *as, int dest_r64, mp_uint_t label);
+void asm_x86_call_ind(asm_x86_t *as, size_t fun_id, mp_uint_t n_args, int temp_r32);
+
+// Holds a pointer to mp_fun_table
+#define ASM_X86_REG_FUN_TABLE ASM_X86_REG_EBP
+
+#if defined(GENERIC_ASM_API) && GENERIC_ASM_API
+
+// The following macros provide a (mostly) arch-independent API to
+// generate native code, and are used by the native emitter.
+
+#define ASM_WORD_SIZE (4)
+
+#define REG_RET ASM_X86_REG_EAX
+#define REG_ARG_1 ASM_X86_REG_ARG_1
+#define REG_ARG_2 ASM_X86_REG_ARG_2
+#define REG_ARG_3 ASM_X86_REG_ARG_3
+#define REG_ARG_4 ASM_X86_REG_ARG_4
+
+// caller-save, so can be used as temporaries
+#define REG_TEMP0 ASM_X86_REG_EAX
+#define REG_TEMP1 ASM_X86_REG_ECX
+#define REG_TEMP2 ASM_X86_REG_EDX
+
+// callee-save, so can be used as locals
+#define REG_LOCAL_1 ASM_X86_REG_EBX
+#define REG_LOCAL_2 ASM_X86_REG_ESI
+#define REG_LOCAL_3 ASM_X86_REG_EDI
+#define REG_LOCAL_NUM (3)
+
+// Holds a pointer to mp_fun_table
+#define REG_FUN_TABLE ASM_X86_REG_FUN_TABLE
+
+#define ASM_T               asm_x86_t
+#define ASM_END_PASS        asm_x86_end_pass
+#define ASM_ENTRY           asm_x86_entry
+#define ASM_EXIT            asm_x86_exit
+
+#define ASM_JUMP            asm_x86_jmp_label
+#define ASM_JUMP_IF_REG_ZERO(as, reg, label, bool_test) \
+    do { \
+        if (bool_test) { \
+            asm_x86_test_r8_with_r8(as, reg, reg); \
+        } else { \
+            asm_x86_test_r32_with_r32(as, reg, reg); \
+        } \
+        asm_x86_jcc_label(as, ASM_X86_CC_JZ, label); \
+    } while (0)
+#define ASM_JUMP_IF_REG_NONZERO(as, reg, label, bool_test) \
+    do { \
+        if (bool_test) { \
+            asm_x86_test_r8_with_r8(as, reg, reg); \
+        } else { \
+            asm_x86_test_r32_with_r32(as, reg, reg); \
+        } \
+        asm_x86_jcc_label(as, ASM_X86_CC_JNZ, label); \
+    } while (0)
+#define ASM_JUMP_IF_REG_EQ(as, reg1, reg2, label) \
+    do { \
+        asm_x86_cmp_r32_with_r32(as, reg1, reg2); \
+        asm_x86_jcc_label(as, ASM_X86_CC_JE, label); \
+    } while (0)
+#define ASM_JUMP_REG(as, reg) asm_x86_jmp_reg((as), (reg))
+#define ASM_CALL_IND(as, idx) asm_x86_call_ind(as, idx, mp_f_n_args[idx], ASM_X86_REG_EAX)
+
+#define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_x86_mov_r32_to_local((as), (reg_src), (local_num))
+#define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
+#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
+#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest))
+#define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_x86_mov_local_to_r32((as), (local_num), (reg_dest))
+#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x86_mov_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_x86_mov_local_addr_to_r32((as), (local_num), (reg_dest))
+#define ASM_MOV_REG_PCREL(as, reg_dest, label) asm_x86_mov_reg_pcrel((as), (reg_dest), (label))
+
+#define ASM_LSL_REG(as, reg) asm_x86_shl_r32_cl((as), (reg))
+#define ASM_LSR_REG(as, reg) asm_x86_shr_r32_cl((as), (reg))
+#define ASM_ASR_REG(as, reg) asm_x86_sar_r32_cl((as), (reg))
+#define ASM_OR_REG_REG(as, reg_dest, reg_src) asm_x86_or_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_XOR_REG_REG(as, reg_dest, reg_src) asm_x86_xor_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_AND_REG_REG(as, reg_dest, reg_src) asm_x86_and_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_x86_add_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_x86_sub_r32_r32((as), (reg_dest), (reg_src))
+#define ASM_MUL_REG_REG(as, reg_dest, reg_src) asm_x86_mul_r32_r32((as), (reg_dest), (reg_src))
+
+#define ASM_LOAD_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem32_to_r32((as), (reg_base), 0, (reg_dest))
+#define ASM_LOAD_REG_REG_OFFSET(as, reg_dest, reg_base, word_offset) asm_x86_mov_mem32_to_r32((as), (reg_base), 4 * (word_offset), (reg_dest))
+#define ASM_LOAD8_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem8_to_r32zx((as), (reg_base), 0, (reg_dest))
+#define ASM_LOAD16_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem16_to_r32zx((as), (reg_base), 0, (reg_dest))
+#define ASM_LOAD32_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem32_to_r32((as), (reg_base), 0, (reg_dest))
+
+#define ASM_STORE_REG_REG(as, reg_src, reg_base) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 0)
+#define ASM_STORE_REG_REG_OFFSET(as, reg_src, reg_base, word_offset) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 4 * (word_offset))
+#define ASM_STORE8_REG_REG(as, reg_src, reg_base) asm_x86_mov_r8_to_mem8((as), (reg_src), (reg_base), 0)
+#define ASM_STORE16_REG_REG(as, reg_src, reg_base) asm_x86_mov_r16_to_mem16((as), (reg_src), (reg_base), 0)
+#define ASM_STORE32_REG_REG(as, reg_src, reg_base) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 0)
+
+#endif // GENERIC_ASM_API
+
+#endif // MICROPY_INCLUDED_PY_ASMX86_H