pike.git/ src/ code/ amd64.c

2013-06-19

2013-06-19 19:08:20 by Henrik Grubbström (Grubba) <grubba@grubba.org>

• bfca6c903fa8ed00850c78c3163e14c42e8e4b8e (8 lines) (+4/-4) ^{[ Show | Annotate ]}
  Branch: 7.9

[amd64] Some constant folding in F_POS_INT_INDEX.

2364:    mov_mem_reg( sp_reg, -1*sizeof(struct svalue)+8, REG_RDX ); /* u.array */    /* -> arr[sizeof(arr)-b] */    mov_mem32_reg( REG_RDX, OFFSETOF(array,size), REG_RCX ); -  mov_imm_reg( b, REG_RBX); -  cmp_reg_reg( REG_RCX, REG_RBX ); -  jge( &label_A ); /* b >= RBX, index outside array */ -  shl_reg_imm( REG_RBX, 4 ); +  cmp_reg32_imm( REG_RCX, b ); +  jle( &label_A ); /* RCX <= b, index outside array */ +  mov_imm_reg( b * sizeof(struct svalue), REG_RBX);    add_reg_mem( REG_RBX, REG_RDX, OFFSETOF(array,item) );       /* This overwrites the array. */