6 /* Load a 32-bit value from a PowerPC LIS/ORI sequence */
7 fixnum instruction_operand::load_value_2_2()
9 cell *ptr = (cell *)pointer;
10 cell hi = (ptr[-1] & 0xffff);
11 cell lo = (ptr[ 0] & 0xffff);
15 /* Load a value from a bitfield of a PowerPC instruction */
16 fixnum instruction_operand::load_value_masked(cell mask, fixnum shift)
18 cell *ptr = (cell *)pointer;
20 return (*ptr & mask) << shift;
23 fixnum instruction_operand::load_value()
27 case RC_ABSOLUTE_CELL:
28 return *(cell *)pointer;
30 return *(u32*)pointer;
32 return *(s32*)pointer + pointer + sizeof(u32);
33 case RC_ABSOLUTE_PPC_2_2:
34 return load_value_2_2();
35 case RC_ABSOLUTE_PPC_2:
36 return load_value_masked(rel_absolute_ppc_2_mask,0);
37 case RC_RELATIVE_PPC_2:
38 return load_value_masked(rel_relative_ppc_2_mask,0) + pointer;
39 case RC_RELATIVE_PPC_3:
40 return load_value_masked(rel_relative_ppc_3_mask,0) + pointer;
41 case RC_RELATIVE_ARM_3:
42 return load_value_masked(rel_relative_arm_3_mask,2) + pointer + sizeof(cell) * 2;
44 return load_value_masked(rel_indirect_arm_mask,0) + pointer + sizeof(cell);
45 case RC_INDIRECT_ARM_PC:
46 return load_value_masked(rel_indirect_arm_mask,0) + pointer + sizeof(cell) * 2;
48 critical_error("Bad rel class",rel_class);
53 /* Store a 32-bit value into a PowerPC LIS/ORI sequence */
54 void instruction_operand::store_value_2_2(fixnum value)
56 cell *ptr = (cell *)pointer;
57 ptr[-1] = ((ptr[-1] & ~0xffff) | ((value >> 16) & 0xffff));
58 ptr[ 0] = ((ptr[ 0] & ~0xffff) | (value & 0xffff));
61 /* Store a value into a bitfield of a PowerPC instruction */
62 void instruction_operand::store_value_masked(fixnum value, cell mask, fixnum shift)
64 cell *ptr = (cell *)pointer;
66 /* This is unaccurate but good enough */
67 fixnum test = (fixnum)mask >> 1;
68 if(value <= -test || value >= test)
69 critical_error("Value does not fit inside relocation",0);
71 *ptr = ((*ptr & ~mask) | ((value >> shift) & mask));
74 void instruction_operand::store_value(fixnum absolute_value)
76 fixnum relative_value = absolute_value - pointer;
80 case RC_ABSOLUTE_CELL:
81 *(cell *)pointer = absolute_value;
84 *(u32*)pointer = absolute_value;
87 *(s32*)pointer = relative_value - sizeof(u32);
89 case RC_ABSOLUTE_PPC_2_2:
90 store_value_2_2(absolute_value);
92 case RC_ABSOLUTE_PPC_2:
93 store_value_masked(absolute_value,rel_absolute_ppc_2_mask,0);
95 case RC_RELATIVE_PPC_2:
96 store_value_masked(relative_value,rel_relative_ppc_2_mask,0);
98 case RC_RELATIVE_PPC_3:
99 store_value_masked(relative_value,rel_relative_ppc_3_mask,0);
101 case RC_RELATIVE_ARM_3:
102 store_value_masked(relative_value - sizeof(cell) * 2,rel_relative_arm_3_mask,2);
104 case RC_INDIRECT_ARM:
105 store_value_masked(relative_value - sizeof(cell),rel_indirect_arm_mask,0);
107 case RC_INDIRECT_ARM_PC:
108 store_value_masked(relative_value - sizeof(cell) * 2,rel_indirect_arm_mask,0);
111 critical_error("Bad rel class",rel_class);