diff options
| -rw-r--r-- | cgias.c | 51 | ||||
| -rw-r--r-- | cgiwas.c | 81 |
2 files changed, 124 insertions, 8 deletions
@@ -1910,6 +1910,57 @@ static void as_div_instruction (struct instruction *instruction) d_reg=instruction->instruction_parameters[1].parameter_data.reg.r; + if (instruction->instruction_parameters[0].parameter_type==P_IMMEDIATE){ + int i,log2i; + + i=instruction->instruction_parameters[0].parameter_data.i; + + if (! ((i & (i-1))==0 && i>0)){ + internal_error_in_function ("as_div_instruction"); + return; + } + + if (i==1) + return; + + log2i=0; + while (i>1){ + i=i>>1; + ++log2i; + } + + as_move_r_r (d_reg,REGISTER_O0); + + if (log2i==1){ + /* sar */ + store_c (0301); + store_c (0300 | (7<<3) | reg_num (REGISTER_O0)); + store_c (31); + + as_r_r (0053,REGISTER_O0,d_reg); /* sub */ + } else { + /* sar */ + store_c (0301); + store_c (0300 | (7<<3) | reg_num (d_reg)); + store_c (31); + + /* and */ + if (d_reg==EAX) + store_c (045); + else + as_r (0201,040,d_reg); + store_l ((1<<log2i)-1); + + as_r_r (0003,REGISTER_O0,d_reg); /* add */ + } + + store_c (0301); + store_c (0300 | (7<<3) | reg_num (d_reg)); + store_c (log2i); + + return; + } + switch (d_reg){ case REGISTER_D0: as_move_r_r (REGISTER_A1,REGISTER_O0); @@ -1507,6 +1507,71 @@ static void w_as_div_instruction (struct instruction *instruction) d_reg=instruction->instruction_parameters[1].parameter_data.reg.r; + if (instruction->instruction_parameters[0].parameter_type==P_IMMEDIATE){ + int i,log2i; + + i=instruction->instruction_parameters[0].parameter_data.i; + + if (! ((i & (i-1))==0 && i>0)){ + internal_error_in_function ("w_as_div_instruction"); + return; + } + + if (i==1) + return; + + log2i=0; + while (i>1){ + i=i>>1; + ++log2i; + } + + w_as_opcode_movl(); + w_as_register_register_newline (d_reg,REGISTER_O0); + + if (log2i==1){ + w_as_opcode ("sar"); + if (intel_asm) + w_as_register_comma (REGISTER_O0); + w_as_immediate (31); + if (!intel_asm) + w_as_comma_register (REGISTER_O0); + w_as_newline(); + + w_as_opcode ("sub"); + w_as_register_register_newline (REGISTER_O0,d_reg); + } else { + w_as_opcode ("sar"); + if (intel_asm) + w_as_register_comma (d_reg); + w_as_immediate (31); + if (!intel_asm) + w_as_comma_register (d_reg); + w_as_newline(); + + w_as_opcode ("and"); + if (intel_asm) + w_as_register_comma (d_reg); + w_as_immediate ((1<<log2i)-1); + if (!intel_asm) + w_as_comma_register (d_reg); + w_as_newline(); + + w_as_opcode ("add"); + w_as_register_register_newline (REGISTER_O0,d_reg); + } + + w_as_opcode ("sar"); + if (intel_asm) + w_as_register_comma (d_reg); + w_as_immediate (log2i); + if (!intel_asm) + w_as_comma_register (d_reg); + w_as_newline(); + + return; + } + switch (d_reg){ case REGISTER_D0: w_as_opcode_movl(); @@ -1524,10 +1589,10 @@ static void w_as_div_instruction (struct instruction *instruction) fprintf (assembly_file,"dword ptr "); if (instruction->instruction_parameters[0].parameter_type==P_INDIRECT && instruction->instruction_parameters[0].parameter_data.reg.r==REGISTER_A1) - { - w_as_indirect (instruction->instruction_parameters[0].parameter_offset,REGISTER_O0); - } else - w_as_parameter (&instruction->instruction_parameters[0]); + { + w_as_indirect (instruction->instruction_parameters[0].parameter_offset,REGISTER_O0); + } else + w_as_parameter (&instruction->instruction_parameters[0]); } w_as_newline(); @@ -1651,10 +1716,10 @@ static void w_as_mod_instruction (struct instruction *instruction) fprintf (assembly_file,"dword ptr "); if (instruction->instruction_parameters[0].parameter_type==P_INDIRECT && instruction->instruction_parameters[0].parameter_data.reg.r==REGISTER_A1) - { - w_as_indirect (instruction->instruction_parameters[0].parameter_offset,REGISTER_O0); - } else - w_as_parameter (&instruction->instruction_parameters[0]); + { + w_as_indirect (instruction->instruction_parameters[0].parameter_offset,REGISTER_O0); + } else + w_as_parameter (&instruction->instruction_parameters[0]); } w_as_newline(); |