Mercurial > hg > truffle
diff src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 20438:166d744df0de
8055494: Add C2 x86 intrinsic for BigInteger::multiplyToLen() method
Summary: Add new C2 intrinsic for BigInteger::multiplyToLen() on x86 in 64-bit VM.
Reviewed-by: roland
author | kvn |
---|---|
date | Tue, 02 Sep 2014 12:48:45 -0700 |
parents | 04d32e7fad07 |
children | 7848fc12602b |
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--- a/src/cpu/x86/vm/stubGenerator_x86_64.cpp Tue Sep 09 19:18:13 2014 +0000 +++ b/src/cpu/x86/vm/stubGenerator_x86_64.cpp Tue Sep 02 12:48:45 2014 -0700 @@ -3677,6 +3677,70 @@ return start; } + + /** + * Arguments: + * + * Input: + * c_rarg0 - x address + * c_rarg1 - x length + * c_rarg2 - y address + * c_rarg3 - y lenth + * not Win64 + * c_rarg4 - z address + * c_rarg5 - z length + * Win64 + * rsp+40 - z address + * rsp+48 - z length + */ + address generate_multiplyToLen() { + __ align(CodeEntryAlignment); + StubCodeMark mark(this, "StubRoutines", "multiplyToLen"); + + address start = __ pc(); + // Win64: rcx, rdx, r8, r9 (c_rarg0, c_rarg1, ...) + // Unix: rdi, rsi, rdx, rcx, r8, r9 (c_rarg0, c_rarg1, ...) + const Register x = rdi; + const Register xlen = rax; + const Register y = rsi; + const Register ylen = rcx; + const Register z = r8; + const Register zlen = r11; + + // Next registers will be saved on stack in multiply_to_len(). + const Register tmp1 = r12; + const Register tmp2 = r13; + const Register tmp3 = r14; + const Register tmp4 = r15; + const Register tmp5 = rbx; + + BLOCK_COMMENT("Entry:"); + __ enter(); // required for proper stackwalking of RuntimeStub frame + +#ifndef _WIN64 + __ movptr(zlen, r9); // Save r9 in r11 - zlen +#endif + setup_arg_regs(4); // x => rdi, xlen => rsi, y => rdx + // ylen => rcx, z => r8, zlen => r11 + // r9 and r10 may be used to save non-volatile registers +#ifdef _WIN64 + // last 2 arguments (#4, #5) are on stack on Win64 + __ movptr(z, Address(rsp, 6 * wordSize)); + __ movptr(zlen, Address(rsp, 7 * wordSize)); +#endif + + __ movptr(xlen, rsi); + __ movptr(y, rdx); + __ multiply_to_len(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5); + + restore_arg_regs(); + + __ leave(); // required for proper stackwalking of RuntimeStub frame + __ ret(0); + + return start; + } + #undef __ #define __ masm-> @@ -3917,6 +3981,11 @@ generate_safefetch("SafeFetchN", sizeof(intptr_t), &StubRoutines::_safefetchN_entry, &StubRoutines::_safefetchN_fault_pc, &StubRoutines::_safefetchN_continuation_pc); +#ifdef COMPILER2 + if (UseMultiplyToLenIntrinsic) { + StubRoutines::_multiplyToLen = generate_multiplyToLen(); + } +#endif } public: