5 instruction_operand::instruction_operand(relocation_entry rel,
6 code_block* compiled, cell index)
10 pointer((cell) compiled->entry_point() + rel.rel_offset()) {}
12 /* Load a 32-bit value from a PowerPC LIS/ORI sequence */
13 fixnum instruction_operand::load_value_2_2() {
14 uint32_t* ptr = (uint32_t*)pointer;
15 cell hi = (ptr[-2] & 0xffff);
16 cell lo = (ptr[-1] & 0xffff);
20 /* Load a 64-bit value from a PowerPC LIS/ORI/SLDI/ORIS/ORI sequence */
21 fixnum instruction_operand::load_value_2_2_2_2() {
22 uint32_t* ptr = (uint32_t*)pointer;
23 uint64_t hhi = (ptr[-5] & 0xffff);
24 uint64_t hlo = (ptr[-4] & 0xffff);
25 uint64_t lhi = (ptr[-2] & 0xffff);
26 uint64_t llo = (ptr[-1] & 0xffff);
27 uint64_t val = hhi << 48 | hlo << 32 | lhi << 16 | llo;
31 /* Load a value from a bitfield of a PowerPC instruction */
32 fixnum instruction_operand::load_value_masked(cell mask, cell bits,
34 int32_t* ptr = (int32_t*)(pointer - sizeof(uint32_t));
36 return (((*ptr & (int32_t) mask) << bits) >> bits) << shift;
39 fixnum instruction_operand::load_value(cell relative_to) {
40 switch (rel.rel_class()) {
41 case RC_ABSOLUTE_CELL:
42 return *(cell*)(pointer - sizeof(cell));
44 return *(uint32_t*)(pointer - sizeof(uint32_t));
46 return *(int32_t*)(pointer - sizeof(uint32_t)) + relative_to;
47 case RC_ABSOLUTE_PPC_2_2:
48 return load_value_2_2();
49 case RC_ABSOLUTE_PPC_2:
50 return load_value_masked(rel_absolute_ppc_2_mask, 16, 0);
51 case RC_RELATIVE_PPC_2_PC:
52 return load_value_masked(rel_relative_ppc_2_mask, 16, 0) + relative_to -
54 case RC_RELATIVE_PPC_3_PC:
55 return load_value_masked(rel_relative_ppc_3_mask, 6, 0) + relative_to - 4;
56 case RC_RELATIVE_ARM_3:
57 return load_value_masked(rel_relative_arm_3_mask, 6, 2) + relative_to +
60 return load_value_masked(rel_indirect_arm_mask, 20, 0) + relative_to;
61 case RC_INDIRECT_ARM_PC:
62 return load_value_masked(rel_indirect_arm_mask, 20, 0) + relative_to +
65 return *(uint16_t*)(pointer - sizeof(uint16_t));
67 return *(uint8_t*)(pointer - sizeof(uint8_t));
68 case RC_ABSOLUTE_PPC_2_2_2_2:
69 return load_value_2_2_2_2();
71 critical_error("Bad rel class", rel.rel_class());
76 fixnum instruction_operand::load_value() { return load_value(pointer); }
78 code_block* instruction_operand::load_code_block(cell relative_to) {
79 return ((code_block*)load_value(relative_to) - 1);
82 code_block* instruction_operand::load_code_block() {
83 return load_code_block(pointer);
86 /* Store a 32-bit value into a PowerPC LIS/ORI sequence */
87 void instruction_operand::store_value_2_2(fixnum value) {
88 uint32_t* ptr = (uint32_t*)pointer;
89 ptr[-2] = ((ptr[-2] & ~0xffff) | ((value >> 16) & 0xffff));
90 ptr[-1] = ((ptr[-1] & ~0xffff) | (value & 0xffff));
93 /* Store a 64-bit value into a PowerPC LIS/ORI/SLDI/ORIS/ORI sequence */
94 void instruction_operand::store_value_2_2_2_2(fixnum value) {
96 uint32_t* ptr = (uint32_t*)pointer;
97 ptr[-5] = ((ptr[-5] & ~0xffff) | ((val >> 48) & 0xffff));
98 ptr[-4] = ((ptr[-4] & ~0xffff) | ((val >> 32) & 0xffff));
99 ptr[-2] = ((ptr[-2] & ~0xffff) | ((val >> 16) & 0xffff));
100 ptr[-1] = ((ptr[-1] & ~0xffff) | ((val >> 0) & 0xffff));
103 /* Store a value into a bitfield of a PowerPC instruction */
104 void instruction_operand::store_value_masked(fixnum value, cell mask,
106 uint32_t* ptr = (uint32_t*)(pointer - sizeof(uint32_t));
107 *ptr = (uint32_t)((*ptr & ~mask) | ((value >> shift) & mask));
110 void instruction_operand::store_value(fixnum absolute_value) {
111 fixnum relative_value = absolute_value - pointer;
113 switch (rel.rel_class()) {
114 case RC_ABSOLUTE_CELL:
115 *(cell*)(pointer - sizeof(cell)) = absolute_value;
118 *(uint32_t*)(pointer - sizeof(uint32_t)) = (uint32_t) absolute_value;
121 *(int32_t*)(pointer - sizeof(int32_t)) = (int32_t) relative_value;
123 case RC_ABSOLUTE_PPC_2_2:
124 store_value_2_2(absolute_value);
126 case RC_ABSOLUTE_PPC_2:
127 store_value_masked(absolute_value, rel_absolute_ppc_2_mask, 0);
129 case RC_RELATIVE_PPC_2_PC:
130 store_value_masked(relative_value + 4, rel_relative_ppc_2_mask, 0);
132 case RC_RELATIVE_PPC_3_PC:
133 store_value_masked(relative_value + 4, rel_relative_ppc_3_mask, 0);
135 case RC_RELATIVE_ARM_3:
136 store_value_masked(relative_value - sizeof(cell), rel_relative_arm_3_mask,
139 case RC_INDIRECT_ARM:
140 store_value_masked(relative_value, rel_indirect_arm_mask, 0);
142 case RC_INDIRECT_ARM_PC:
143 store_value_masked(relative_value - sizeof(cell), rel_indirect_arm_mask,
147 *(uint16_t*)(pointer - sizeof(uint16_t)) = (uint16_t) absolute_value;
150 *(uint8_t*)(pointer - sizeof(uint8_t)) = (uint8_t) absolute_value;
152 case RC_ABSOLUTE_PPC_2_2_2_2:
153 store_value_2_2_2_2(absolute_value);
156 critical_error("Bad rel class", rel.rel_class());
161 void instruction_operand::store_code_block(code_block* compiled) {
162 store_value((cell) compiled->entry_point());