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| author | Guillaume Sanchez <guillaumesa@google.com> | 2015-03-30 17:55:45 +0100 |
|---|---|---|
| committer | Guillaume Sanchez <guillaumesa@google.com> | 2015-04-09 12:24:10 +0100 |
| commit | 0f88e87085b7cf6544dadff3f555773966a6853e (patch) | |
| tree | ea0ae17c712b995e258f1f749a1b8cd98b1fa34b /compiler/utils | |
| parent | c4bd0e6a7f4839ea99222f06979cc2369cb9bf10 (diff) | |
| download | android_art-0f88e87085b7cf6544dadff3f555773966a6853e.tar.gz android_art-0f88e87085b7cf6544dadff3f555773966a6853e.tar.bz2 android_art-0f88e87085b7cf6544dadff3f555773966a6853e.zip | |
Speedup div/rem by constants on x86 and x86_64
This is done using the algorithms in Hacker's Delight chapter 10.
Change-Id: I7bacefe10067569769ed31a1f7834f796fb41119
Diffstat (limited to 'compiler/utils')
| -rw-r--r-- | compiler/utils/x86_64/assembler_x86_64.cc | 8 | ||||
| -rw-r--r-- | compiler/utils/x86_64/assembler_x86_64.h | 1 | ||||
| -rw-r--r-- | compiler/utils/x86_64/assembler_x86_64_test.cc | 4 |
3 files changed, 13 insertions, 0 deletions
diff --git a/compiler/utils/x86_64/assembler_x86_64.cc b/compiler/utils/x86_64/assembler_x86_64.cc index bd155ed788..b8c757c05d 100644 --- a/compiler/utils/x86_64/assembler_x86_64.cc +++ b/compiler/utils/x86_64/assembler_x86_64.cc @@ -1597,6 +1597,14 @@ void X86_64Assembler::imull(CpuRegister reg) { } +void X86_64Assembler::imulq(CpuRegister reg) { + AssemblerBuffer::EnsureCapacity ensured(&buffer_); + EmitRex64(reg); + EmitUint8(0xF7); + EmitOperand(5, Operand(reg)); +} + + void X86_64Assembler::imull(const Address& address) { AssemblerBuffer::EnsureCapacity ensured(&buffer_); EmitOptionalRex32(address); diff --git a/compiler/utils/x86_64/assembler_x86_64.h b/compiler/utils/x86_64/assembler_x86_64.h index 495f74f498..e2fd5fbb80 100644 --- a/compiler/utils/x86_64/assembler_x86_64.h +++ b/compiler/utils/x86_64/assembler_x86_64.h @@ -465,6 +465,7 @@ class X86_64Assembler FINAL : public Assembler { void imull(CpuRegister reg, const Immediate& imm); void imull(CpuRegister reg, const Address& address); + void imulq(CpuRegister src); void imulq(CpuRegister dst, CpuRegister src); void imulq(CpuRegister reg, const Immediate& imm); void imulq(CpuRegister reg, const Address& address); diff --git a/compiler/utils/x86_64/assembler_x86_64_test.cc b/compiler/utils/x86_64/assembler_x86_64_test.cc index 00f508b23f..c2052c7732 100644 --- a/compiler/utils/x86_64/assembler_x86_64_test.cc +++ b/compiler/utils/x86_64/assembler_x86_64_test.cc @@ -269,6 +269,10 @@ TEST_F(AssemblerX86_64Test, AddlImm) { DriverStr(Repeatri(&x86_64::X86_64Assembler::addl, 4U, "add ${imm}, %{reg}"), "addli"); } +TEST_F(AssemblerX86_64Test, ImulqReg1) { + DriverStr(RepeatR(&x86_64::X86_64Assembler::imulq, "imulq %{reg}"), "imulq"); +} + TEST_F(AssemblerX86_64Test, ImulqRegs) { DriverStr(RepeatRR(&x86_64::X86_64Assembler::imulq, "imulq %{reg2}, %{reg1}"), "imulq"); } |