Mercurial > hg > truffle
diff src/cpu/x86/vm/c1_LIRGenerator_x86.cpp @ 6084:6759698e3140
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 | 5cceda753a4a |
children | 8b0a4867acf0 |
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--- a/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp Mon May 14 09:36:00 2012 -0700 +++ b/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp Tue May 15 10:10:23 2012 +0200 @@ -823,7 +823,7 @@ void LIRGenerator::do_MathIntrinsic(Intrinsic* x) { - assert(x->number_of_arguments() == 1, "wrong type"); + assert(x->number_of_arguments() == 1 || (x->number_of_arguments() == 2 && x->id() == vmIntrinsics::_dpow), "wrong type"); LIRItem value(x->argument_at(0), this); bool use_fpu = false; @@ -834,6 +834,8 @@ case vmIntrinsics::_dtan: case vmIntrinsics::_dlog: case vmIntrinsics::_dlog10: + case vmIntrinsics::_dexp: + case vmIntrinsics::_dpow: use_fpu = true; } } else { @@ -843,20 +845,37 @@ value.load_item(); LIR_Opr calc_input = value.result(); + LIR_Opr calc_input2 = NULL; + if (x->id() == vmIntrinsics::_dpow) { + LIRItem extra_arg(x->argument_at(1), this); + if (UseSSE < 2) { + extra_arg.set_destroys_register(); + } + extra_arg.load_item(); + calc_input2 = extra_arg.result(); + } LIR_Opr calc_result = rlock_result(x); - // sin and cos need two free fpu stack slots, so register two temporary operands + // sin, cos, pow and exp need two free fpu stack slots, so register + // two temporary operands LIR_Opr tmp1 = FrameMap::caller_save_fpu_reg_at(0); LIR_Opr tmp2 = FrameMap::caller_save_fpu_reg_at(1); if (use_fpu) { LIR_Opr tmp = FrameMap::fpu0_double_opr; + int tmp_start = 1; + if (calc_input2 != NULL) { + __ move(calc_input2, tmp); + tmp_start = 2; + calc_input2 = tmp; + } __ move(calc_input, tmp); calc_input = tmp; calc_result = tmp; - tmp1 = FrameMap::caller_save_fpu_reg_at(1); - tmp2 = FrameMap::caller_save_fpu_reg_at(2); + + tmp1 = FrameMap::caller_save_fpu_reg_at(tmp_start); + tmp2 = FrameMap::caller_save_fpu_reg_at(tmp_start + 1); } switch(x->id()) { @@ -867,6 +886,8 @@ case vmIntrinsics::_dtan: __ tan (calc_input, calc_result, tmp1, tmp2); break; case vmIntrinsics::_dlog: __ log (calc_input, calc_result, tmp1); break; case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1); break; + case vmIntrinsics::_dexp: __ exp (calc_input, calc_result, tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break; + case vmIntrinsics::_dpow: __ pow (calc_input, calc_input2, calc_result, tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break; default: ShouldNotReachHere(); }