diff options
Diffstat (limited to 'py/asmx86.h')
| -rw-r--r-- | py/asmx86.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/py/asmx86.h b/py/asmx86.h index 5d0fc70e3..1f4cfaf55 100644 --- a/py/asmx86.h +++ b/py/asmx86.h @@ -24,6 +24,14 @@ * THE SOFTWARE. */ +// 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 + #define ASM_X86_PASS_COMPUTE (1) #define ASM_X86_PASS_EMIT (2) @@ -45,8 +53,8 @@ #define ASM_X86_CC_JL (0xc) // less, signed #define REG_RET REG_EAX -#define REG_ARG_1 REG_EDI -#define REG_ARG_2 REG_ESI +#define REG_ARG_1 REG_EBX +#define REG_ARG_2 REG_ECX #define REG_ARG_3 REG_EDX typedef struct _asm_x86_t asm_x86_t; @@ -71,6 +79,7 @@ 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, mp_uint_t 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); |