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comparison src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 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 da4be62fb889
children 1d7922586cf6
comparison
equal deleted inserted replaced
6057:8f972594effc 6084:6759698e3140
2926 __ fstp_d(Address(rsp, 0)); 2926 __ fstp_d(Address(rsp, 0));
2927 __ movdbl(xmm0, Address(rsp, 0)); 2927 __ movdbl(xmm0, Address(rsp, 0));
2928 __ addq(rsp, 8); 2928 __ addq(rsp, 8);
2929 __ ret(0); 2929 __ ret(0);
2930 } 2930 }
2931 2931 {
2932 // The intrinsic version of these seem to return the same value as 2932 StubCodeMark mark(this, "StubRoutines", "exp");
2933 // the strict version. 2933 StubRoutines::_intrinsic_exp = (double (*)(double)) __ pc();
2934 StubRoutines::_intrinsic_exp = SharedRuntime::dexp; 2934
2935 StubRoutines::_intrinsic_pow = SharedRuntime::dpow; 2935 __ subq(rsp, 8);
2936 __ movdbl(Address(rsp, 0), xmm0);
2937 __ fld_d(Address(rsp, 0));
2938 __ exp_with_fallback(0);
2939 __ fstp_d(Address(rsp, 0));
2940 __ movdbl(xmm0, Address(rsp, 0));
2941 __ addq(rsp, 8);
2942 __ ret(0);
2943 }
2944 {
2945 StubCodeMark mark(this, "StubRoutines", "pow");
2946 StubRoutines::_intrinsic_pow = (double (*)(double,double)) __ pc();
2947
2948 __ subq(rsp, 8);
2949 __ movdbl(Address(rsp, 0), xmm1);
2950 __ fld_d(Address(rsp, 0));
2951 __ movdbl(Address(rsp, 0), xmm0);
2952 __ fld_d(Address(rsp, 0));
2953 __ pow_with_fallback(0);
2954 __ fstp_d(Address(rsp, 0));
2955 __ movdbl(xmm0, Address(rsp, 0));
2956 __ addq(rsp, 8);
2957 __ ret(0);
2958 }
2936 } 2959 }
2937 2960
2938 #undef __ 2961 #undef __
2939 #define __ masm-> 2962 #define __ masm->
2940 2963