pike.git/ src/ code/ amd64.c

2014-08-07

2014-08-07 17:10:11 by Per Hedbor <ph@opera.com>

• 851d19baf4299d31ab38700105d5782c08d269eb (23 lines) (+12/-11) ^{[ Show | Annotate ]}
  Branch: 8.0

Generate more compact code for int+int.

1717:    {    ins_debug_instr_prologue(b, 0, 0);    amd64_load_sp_reg(); -  mov_mem8_reg( sp_reg, -sizeof(struct svalue)*2, P_REG_RAX ); -  shl_reg_imm( P_REG_RAX, 8 ); -  mov_mem8_reg( sp_reg,-sizeof(struct svalue), P_REG_RBX ); -  /* and_reg_imm( P_REG_RBX, 0x1f );*/ -  add_reg_reg( P_REG_RAX, P_REG_RBX ); -  /* and_reg_imm( P_REG_RAX, 0x1f1f ); */ -  cmp_reg32_imm( P_REG_RAX, (PIKE_T_INT<<8)|PIKE_T_INT ); -  jne( &label_A ); +  mov_mem_reg( sp_reg, -sizeof(struct svalue)*2, P_REG_RAX ); +  add_reg_mem( P_REG_RAX, sp_reg, -sizeof(struct svalue ) ); + #if PIKE_T_INT != 0 + #error This code assumes PIKE_T_INT is 0. +  /* cmp_reg32_imm( P_REG_RAX, 0 ); */ + #endif +  jnz( &label_A );    /* So. Both are actually integers. */    mov_mem_reg( sp_reg,    -sizeof(struct svalue)+OFFSETOF(svalue,u.integer),
1732:       add_reg_mem( P_REG_RAX,    sp_reg, -  -sizeof(struct svalue)*2+OFFSETOF(svalue,u.integer) -  ); +  -sizeof(struct svalue)*2+OFFSETOF(svalue,u.integer));       jo( &label_A );    amd64_add_sp( -1 ); -  mov_imm_mem( PIKE_T_INT,sp_reg, -sizeof(struct svalue)); +  /* the type only needs to be set if the subtype was set before. +  It was not, since the type check before would not have +  triggered. */    mov_reg_mem( P_REG_RAX, sp_reg,    -sizeof(struct svalue)+OFFSETOF(svalue,u.integer));    jmp( &label_B );