Mercurial > hg > graal-jvmci-8

comparison src/cpu/sparc/vm/vm_version_sparc.cpp @ 1914:ae065c367d93

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
6987135: Performance regression on Intel platform with 32-bits edition between 6u13 and 6u14. Summary: Use hardware DIV instruction for long division by constant when it is faster than code with multiply. Reviewed-by: never
author kvn
date Tue, 02 Nov 2010 09:00:37 -0700
parents f55c4f82ab9d
children f95d63e2154a
comparison
equal deleted inserted replaced
1913:3b2dea75431e 1914:ae065c367d93
1 /* 1 /*
2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
78 // aligned on a single instruction boundary 78 // aligned on a single instruction boundary
79 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { 79 if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) {
80 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); 80 FLAG_SET_DEFAULT(InteriorEntryAlignment, 4);
81 } 81 }
82 if (is_niagara1_plus()) { 82 if (is_niagara1_plus()) {
83 if (AllocatePrefetchStyle > 0 && FLAG_IS_DEFAULT(AllocatePrefetchStyle)) { 83 if (has_blk_init() && AllocatePrefetchStyle > 0 &&
84 FLAG_IS_DEFAULT(AllocatePrefetchStyle)) {
84 // Use BIS instruction for allocation prefetch. 85 // Use BIS instruction for allocation prefetch.
85 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3); 86 FLAG_SET_DEFAULT(AllocatePrefetchStyle, 3);
86 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { 87 if (FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
87 // Use smaller prefetch distance on N2 with BIS 88 // Use smaller prefetch distance on N2 with BIS
88 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64); 89 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 64);
116 // Currently not supported anywhere. 117 // Currently not supported anywhere.
117 FLAG_SET_DEFAULT(UseFPUForSpilling, false); 118 FLAG_SET_DEFAULT(UseFPUForSpilling, false);
118 #endif 119 #endif
119 120
120 char buf[512]; 121 char buf[512];
121 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s", 122 jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
122 (has_v8() ? ", has_v8" : ""), 123 (has_v8() ? ", has_v8" : ""),
123 (has_v9() ? ", has_v9" : ""), 124 (has_v9() ? ", has_v9" : ""),
124 (has_hardware_popc() ? ", popc" : ""), 125 (has_hardware_popc() ? ", popc" : ""),
125 (has_vis1() ? ", has_vis1" : ""), 126 (has_vis1() ? ", has_vis1" : ""),
126 (has_vis2() ? ", has_vis2" : ""), 127 (has_vis2() ? ", has_vis2" : ""),
128 (has_blk_init() ? ", has_blk_init" : ""),
127 (is_ultra3() ? ", is_ultra3" : ""), 129 (is_ultra3() ? ", is_ultra3" : ""),
128 (is_sun4v() ? ", is_sun4v" : ""), 130 (is_sun4v() ? ", is_sun4v" : ""),
129 (is_niagara1() ? ", is_niagara1" : ""), 131 (is_niagara1() ? ", is_niagara1" : ""),
130 (is_niagara1_plus() ? ", is_niagara1_plus" : ""), 132 (is_niagara1_plus() ? ", is_niagara1_plus" : ""),
133 (is_sparc64() ? ", is_sparc64" : ""),
131 (!has_hardware_mul32() ? ", no-mul32" : ""), 134 (!has_hardware_mul32() ? ", no-mul32" : ""),
132 (!has_hardware_div32() ? ", no-div32" : ""), 135 (!has_hardware_div32() ? ", no-div32" : ""),
133 (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); 136 (!has_hardware_fsmuld() ? ", no-fsmuld" : ""));
134 137
135 // buf is started with ", " or is empty 138 // buf is started with ", " or is empty