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comparison src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 3892:baf763f388e6

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7059037: Use BIS for zeroing on T4 Summary: Use BIS for zeroing new allocated big (2Kb and more) objects and arrays. Reviewed-by: never, twisti, ysr
author kvn
date Fri, 26 Aug 2011 08:52:22 -0700
parents 3d42f82cd811
children 2f9b79ddb05c
comparison
equal deleted inserted replaced
3891:ac8738449b6f 3892:baf763f388e6
3066 __ BIND(L_failed); 3066 __ BIND(L_failed);
3067 __ retl(); 3067 __ retl();
3068 __ delayed()->sub(G0, 1, O0); // return -1 3068 __ delayed()->sub(G0, 1, O0); // return -1
3069 return start; 3069 return start;
3070 } 3070 }
3071
3072 //
3073 // Generate stub for heap zeroing.
3074 // "to" address is aligned to jlong (8 bytes).
3075 //
3076 // Arguments for generated stub:
3077 // to: O0
3078 // count: O1 treated as signed (count of HeapWord)
3079 // count could be 0
3080 //
3081 address generate_zero_aligned_words(const char* name) {
3082 __ align(CodeEntryAlignment);
3083 StubCodeMark mark(this, "StubRoutines", name);
3084 address start = __ pc();
3085
3086 const Register to = O0; // source array address
3087 const Register count = O1; // HeapWords count
3088 const Register temp = O2; // scratch
3089
3090 Label Ldone;
3091 __ sllx(count, LogHeapWordSize, count); // to bytes count
3092 // Use BIS for zeroing
3093 __ bis_zeroing(to, count, temp, Ldone);
3094 __ bind(Ldone);
3095 __ retl();
3096 __ delayed()->nop();
3097 return start;
3098 }
3071 3099
3072 void generate_arraycopy_stubs() { 3100 void generate_arraycopy_stubs() {
3073 address entry; 3101 address entry;
3074 address entry_jbyte_arraycopy; 3102 address entry_jbyte_arraycopy;
3075 address entry_jshort_arraycopy; 3103 address entry_jshort_arraycopy;
3193 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); 3221 StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill");
3194 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); 3222 StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill");
3195 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); 3223 StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill");
3196 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); 3224 StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill");
3197 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); 3225 StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill");
3226
3227 if (UseBlockZeroing) {
3228 StubRoutines::_zero_aligned_words = generate_zero_aligned_words("zero_aligned_words");
3229 }
3198 } 3230 }
3199 3231
3200 void generate_initial() { 3232 void generate_initial() {
3201 // Generates all stubs and initializes the entry points 3233 // Generates all stubs and initializes the entry points
3202 3234