diff options
Diffstat (limited to 'src/asmjit/arm/a64rapass.cpp')
| -rw-r--r-- | src/asmjit/arm/a64rapass.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/asmjit/arm/a64rapass.cpp b/src/asmjit/arm/a64rapass.cpp index 597ae5c..9e81473 100644 --- a/src/asmjit/arm/a64rapass.cpp +++ b/src/asmjit/arm/a64rapass.cpp @@ -713,6 +713,48 @@ ASMJIT_FAVOR_SPEED Error ARMRAPass::_rewrite(BaseNode* first, BaseNode* stop) no mem.clearRegHome(); mem.addOffsetLo32(offset); } + + // Rewrite `loadAddressOf()` construct. + if (node->type() == NodeType::kInst) { + InstNode* inst = node->as<InstNode>(); + if (inst->realId() == Inst::kIdAdr && inst->opCount() == 2) { + int64_t offset = mem.offset(); + if (!mem.hasBase()) { + inst->setId(Inst::kIdMov); + inst->setOp(1, Imm(offset)); + } + else { + InstId op = offset < 0 ? Inst::kIdSub : Inst::kIdAdd; + uint64_t val = offset < 0 ? Support::neg(uint64_t(offset)) : uint64_t(offset); + + GpX base = GpX(mem.baseId()); + + inst->setId(op); + inst->setOpCount(3); + inst->setOp(1, base); + inst->setOp(2, Imm(val)); + + if (val > 0xFFFu && (val & ~uint64_t(0xFFF000u)) != 0) { + const Operand_& dst = inst->op(0); + // Use two operations if the stack address is greater than 4095. + if (val <= 0xFFFFFFu) { + cc()->_setCursor(inst->prev()); + cc()->_emitI(op, dst, base, Imm(val & 0xFFFu)); + + inst->setOp(1, dst); + inst->setOp(2, Imm(val & 0xFFF000u)); + } + else { + cc()->_setCursor(inst->prev()); + cc()->_emitI(Inst::kIdMov, inst->op(0), Imm(val)); + + inst->setOp(1, base); + inst->setOp(2, dst); + } + } + } + } + } } } } |