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(cell relative_to)
27 case RC_ABSOLUTE_CELL:
28 return *(cell *)pointer;
30 return *(u32*)pointer;
32 return *(s32*)pointer + relative_to + 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) + relative_to;
39 case RC_RELATIVE_PPC_3:
40 return load_value_masked(rel_relative_ppc_3_mask,0) + relative_to;
41 case RC_RELATIVE_ARM_3:
42 return load_value_masked(rel_relative_arm_3_mask,2) + relative_to + sizeof(cell) * 2;
44 return load_value_masked(rel_indirect_arm_mask,0) + relative_to + sizeof(cell);
45 case RC_INDIRECT_ARM_PC:
46 return load_value_masked(rel_indirect_arm_mask,0) + relative_to + sizeof(cell) * 2;
48 critical_error("Bad rel class",rel_class);
53 fixnum instruction_operand::load_value()
55 return load_value(pointer);
58 /* Store a 32-bit value into a PowerPC LIS/ORI sequence */
59 void instruction_operand::store_value_2_2(fixnum value)
61 cell *ptr = (cell *)pointer;
62 ptr[-1] = ((ptr[-1] & ~0xffff) | ((value >> 16) & 0xffff));
63 ptr[ 0] = ((ptr[ 0] & ~0xffff) | (value & 0xffff));
66 /* Store a value into a bitfield of a PowerPC instruction */
67 void instruction_operand::store_value_masked(fixnum value, cell mask, fixnum shift)
69 cell *ptr = (cell *)pointer;
71 /* This is unaccurate but good enough */
72 fixnum test = (fixnum)mask >> 1;
73 if(value <= -test || value >= test)
74 critical_error("Value does not fit inside relocation",0);
76 *ptr = ((*ptr & ~mask) | ((value >> shift) & mask));
79 void instruction_operand::store_value(fixnum absolute_value)
81 fixnum relative_value = absolute_value - pointer;
85 case RC_ABSOLUTE_CELL:
86 *(cell *)pointer = absolute_value;
89 *(u32*)pointer = absolute_value;
92 *(s32*)pointer = relative_value - sizeof(u32);
94 case RC_ABSOLUTE_PPC_2_2:
95 store_value_2_2(absolute_value);
97 case RC_ABSOLUTE_PPC_2:
98 store_value_masked(absolute_value,rel_absolute_ppc_2_mask,0);
100 case RC_RELATIVE_PPC_2:
101 store_value_masked(relative_value,rel_relative_ppc_2_mask,0);
103 case RC_RELATIVE_PPC_3:
104 store_value_masked(relative_value,rel_relative_ppc_3_mask,0);
106 case RC_RELATIVE_ARM_3:
107 store_value_masked(relative_value - sizeof(cell) * 2,rel_relative_arm_3_mask,2);
109 case RC_INDIRECT_ARM:
110 store_value_masked(relative_value - sizeof(cell),rel_indirect_arm_mask,0);
112 case RC_INDIRECT_ARM_PC:
113 store_value_masked(relative_value - sizeof(cell) * 2,rel_indirect_arm_mask,0);
116 critical_error("Bad rel class",rel_class);