--- a/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp Thu Jul 18 09:35:02 2013 -0700
+++ b/hotspot/src/cpu/x86/vm/stubGenerator_x86_64.cpp Fri Jul 19 13:59:25 2013 -0700
@@ -279,7 +279,7 @@
__ stmxcsr(mxcsr_save);
__ movl(rax, mxcsr_save);
__ andl(rax, MXCSR_MASK); // Only check control and mask bits
- ExternalAddress mxcsr_std(StubRoutines::x86::mxcsr_std());
+ ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
__ cmp32(rax, mxcsr_std);
__ jcc(Assembler::equal, skip_ldmx);
__ ldmxcsr(mxcsr_std);
@@ -729,17 +729,18 @@
if (CheckJNICalls) {
Label ok_ret;
+ ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
__ push(rax);
__ subptr(rsp, wordSize); // allocate a temp location
__ stmxcsr(mxcsr_save);
__ movl(rax, mxcsr_save);
__ andl(rax, MXCSR_MASK); // Only check control and mask bits
- __ cmpl(rax, *(int *)(StubRoutines::x86::mxcsr_std()));
+ __ cmp32(rax, mxcsr_std);
__ jcc(Assembler::equal, ok_ret);
__ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
- __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std()));
+ __ ldmxcsr(mxcsr_std);
__ bind(ok_ret);
__ addptr(rsp, wordSize);
@@ -3767,12 +3768,35 @@
return stub->entry_point();
}
+ void create_control_words() {
+ // Round to nearest, 53-bit mode, exceptions masked
+ StubRoutines::_fpu_cntrl_wrd_std = 0x027F;
+ // Round to zero, 53-bit mode, exception mased
+ StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F;
+ // Round to nearest, 24-bit mode, exceptions masked
+ StubRoutines::_fpu_cntrl_wrd_24 = 0x007F;
+ // Round to nearest, 64-bit mode, exceptions masked
+ StubRoutines::_fpu_cntrl_wrd_64 = 0x037F;
+ // Round to nearest, 64-bit mode, exceptions masked
+ StubRoutines::_mxcsr_std = 0x1F80;
+ // Note: the following two constants are 80-bit values
+ // layout is critical for correct loading by FPU.
+ // Bias for strict fp multiply/divide
+ StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000
+ StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000;
+ StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff;
+ // Un-Bias for strict fp multiply/divide
+ StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000
+ StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000;
+ StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff;
+ }
+
// Initialization
void generate_initial() {
// Generates all stubs and initializes the entry points
- // This platform-specific stub is needed by generate_call_stub()
- StubRoutines::x86::_mxcsr_std = generate_fp_mask("mxcsr_std", 0x0000000000001F80);
+ // This platform-specific settings are needed by generate_call_stub()
+ create_control_words();
// entry points that exist in all platforms Note: This is code
// that could be shared among different platforms - however the