diff options
| author | Ajax <commial@gmail.com> | 2017-01-09 17:22:49 +0100 |
|---|---|---|
| committer | Ajax <commial@gmail.com> | 2017-01-09 17:27:36 +0100 |
| commit | 5a8bb06aa4f359b1091d0bc10e86524264b60c3d (patch) | |
| tree | c9c80ddb9a66ef572d09ef1fe15159b9094df329 | |
| parent | edf8a67791cd7e3255cce048f2deb1bea436485c (diff) | |
| download | miasm-5a8bb06aa4f359b1091d0bc10e86524264b60c3d.tar.gz miasm-5a8bb06aa4f359b1091d0bc10e86524264b60c3d.zip | |
LLVM: use llvm.ctpop for 'parity' operation
| -rw-r--r-- | miasm2/jitter/llvmconvert.py | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/miasm2/jitter/llvmconvert.py b/miasm2/jitter/llvmconvert.py index 4031d8f2..32d4764c 100644 --- a/miasm2/jitter/llvmconvert.py +++ b/miasm2/jitter/llvmconvert.py @@ -197,10 +197,11 @@ class LLVMContext_JIT(LLVMContext): def add_op(self): "Add operations functions" - p8 = llvm_ir.PointerType(LLVMType.IntType(8)) + i8 = LLVMType.IntType(8) + p8 = llvm_ir.PointerType(i8) itype = LLVMType.IntType(64) - self.add_fc({"parity": {"ret": LLVMType.IntType(1), - "args": [itype]}}) + self.add_fc({"llvm.ctpop.i8": {"ret": i8, + "args": [i8]}}) self.add_fc({"rot_left": {"ret": itype, "args": [itype, itype, @@ -381,8 +382,7 @@ class LLVMFunction(): # Operation translation ## Basics - op_translate = {'parity': 'parity', - 'cpuid': 'cpuid', + op_translate = {'cpuid': 'cpuid', } ## Add the size as first argument op_translate_with_size = {'<<<': 'rot_left', @@ -711,6 +711,16 @@ class LLVMFunction(): self.update_cache(expr, ret) return ret + if op == "parity": + assert len(expr.args) == 1 + arg = self.add_ir(expr.args[0]) + truncated = builder.trunc(arg, LLVMType.IntType(8)) + bitcount = builder.call(self.mod.get_global("llvm.ctpop.i8"), + [truncated]) + ret = builder.not_(builder.trunc(bitcount, LLVMType.IntType(1))) + self.update_cache(expr, ret) + return ret + if op == "segm": fc_ptr = self.mod.get_global("segm2addr") |