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comparison src/cpu/x86/vm/x86_64.ad @ 6084:6759698e3140

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7133857: exp() and pow() should use the x87 ISA on x86 Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2. Reviewed-by: kvn, never, twisti
author roland
date Tue, 15 May 2012 10:10:23 +0200
parents fd09f2d8283e
children ccaa67adfe5b
comparison
equal deleted inserted replaced
6057:8f972594effc 6084:6759698e3140
9821 Opcode(0xD9), Opcode(0xF1), // fyl2x 9821 Opcode(0xD9), Opcode(0xF1), // fyl2x
9822 Push_ResultXD(dst)); 9822 Push_ResultXD(dst));
9823 ins_pipe( pipe_slow ); 9823 ins_pipe( pipe_slow );
9824 %} 9824 %}
9825 9825
9826 9826 instruct powD_reg(regD dst, regD src0, regD src1, rax_RegI rax, rdx_RegI rdx, rcx_RegI rcx, rFlagsReg cr) %{
9827 match(Set dst (PowD src0 src1)); // Raise src0 to the src1'th power
9828 effect(KILL rax, KILL rdx, KILL rcx, KILL cr);
9829 format %{ "fast_pow $src0 $src1 -> $dst // KILL $rax, $rcx, $rdx" %}
9830 ins_encode %{
9831 __ subptr(rsp, 8);
9832 __ movdbl(Address(rsp, 0), $src1$$XMMRegister);
9833 __ fld_d(Address(rsp, 0));
9834 __ movdbl(Address(rsp, 0), $src0$$XMMRegister);
9835 __ fld_d(Address(rsp, 0));
9836 __ fast_pow();
9837 __ fstp_d(Address(rsp, 0));
9838 __ movdbl($dst$$XMMRegister, Address(rsp, 0));
9839 __ addptr(rsp, 8);
9840 %}
9841 ins_pipe( pipe_slow );
9842 %}
9843
9844 instruct expD_reg(regD dst, regD src, rax_RegI rax, rdx_RegI rdx, rcx_RegI rcx, rFlagsReg cr) %{
9845 match(Set dst (ExpD src));
9846 effect(KILL rax, KILL rcx, KILL rdx, KILL cr);
9847 format %{ "fast_exp $dst -> $src // KILL $rax, $rcx, $rdx" %}
9848 ins_encode %{
9849 __ subptr(rsp, 8);
9850 __ movdbl(Address(rsp, 0), $src$$XMMRegister);
9851 __ fld_d(Address(rsp, 0));
9852 __ fast_exp();
9853 __ fstp_d(Address(rsp, 0));
9854 __ movdbl($dst$$XMMRegister, Address(rsp, 0));
9855 __ addptr(rsp, 8);
9856 %}
9857 ins_pipe( pipe_slow );
9858 %}
9827 9859
9828 //----------Arithmetic Conversion Instructions--------------------------------- 9860 //----------Arithmetic Conversion Instructions---------------------------------
9829 9861
9830 instruct roundFloat_nop(regF dst) 9862 instruct roundFloat_nop(regF dst)
9831 %{ 9863 %{