Mercurial > hg > graal-jvmci-8
comparison src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp @ 1914:ae065c367d93
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 |
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date | Tue, 02 Nov 2010 09:00:37 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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1913:3b2dea75431e | 1914:ae065c367d93 |
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1 /* | 1 /* |
2 * Copyright (c) 2006, 2009, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 2006, 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. |
63 | 63 |
64 int VM_Version::platform_features(int features) { | 64 int VM_Version::platform_features(int features) { |
65 // getisax(2), SI_ARCHITECTURE_32, and SI_ARCHITECTURE_64 are | 65 // getisax(2), SI_ARCHITECTURE_32, and SI_ARCHITECTURE_64 are |
66 // supported on Solaris 10 and later. | 66 // supported on Solaris 10 and later. |
67 if (os::Solaris::supports_getisax()) { | 67 if (os::Solaris::supports_getisax()) { |
68 #ifndef PRODUCT | |
69 if (PrintMiscellaneous && Verbose) | |
70 tty->print_cr("getisax(2) supported."); | |
71 #endif | |
72 | 68 |
73 // Check 32-bit architecture. | 69 // Check 32-bit architecture. |
74 do_sysinfo(SI_ARCHITECTURE_32, "sparc", &features, v8_instructions_m); | 70 do_sysinfo(SI_ARCHITECTURE_32, "sparc", &features, v8_instructions_m); |
75 | 71 |
76 // Check 64-bit architecture. | 72 // Check 64-bit architecture. |
79 // Extract valid instruction set extensions. | 75 // Extract valid instruction set extensions. |
80 uint_t av; | 76 uint_t av; |
81 uint_t avn = os::Solaris::getisax(&av, 1); | 77 uint_t avn = os::Solaris::getisax(&av, 1); |
82 assert(avn == 1, "should only return one av"); | 78 assert(avn == 1, "should only return one av"); |
83 | 79 |
80 #ifndef PRODUCT | |
81 if (PrintMiscellaneous && Verbose) | |
82 tty->print_cr("getisax(2) returned: " PTR32_FORMAT, av); | |
83 #endif | |
84 | |
84 if (av & AV_SPARC_MUL32) features |= hardware_mul32_m; | 85 if (av & AV_SPARC_MUL32) features |= hardware_mul32_m; |
85 if (av & AV_SPARC_DIV32) features |= hardware_div32_m; | 86 if (av & AV_SPARC_DIV32) features |= hardware_div32_m; |
86 if (av & AV_SPARC_FSMULD) features |= hardware_fsmuld_m; | 87 if (av & AV_SPARC_FSMULD) features |= hardware_fsmuld_m; |
87 if (av & AV_SPARC_V8PLUS) features |= v9_instructions_m; | 88 if (av & AV_SPARC_V8PLUS) features |= v9_instructions_m; |
88 if (av & AV_SPARC_POPC) features |= hardware_popc_m; | 89 if (av & AV_SPARC_POPC) features |= hardware_popc_m; |
89 if (av & AV_SPARC_VIS) features |= vis1_instructions_m; | 90 if (av & AV_SPARC_VIS) features |= vis1_instructions_m; |
90 if (av & AV_SPARC_VIS2) features |= vis2_instructions_m; | 91 if (av & AV_SPARC_VIS2) features |= vis2_instructions_m; |
92 | |
93 // Next values are not defined before Solaris 10 | |
94 // but Solaris 8 is used for jdk6 update builds. | |
95 #ifndef AV_SPARC_ASI_BLK_INIT | |
96 #define AV_SPARC_ASI_BLK_INIT 0x0080 /* ASI_BLK_INIT_xxx ASI */ | |
97 #endif | |
98 #ifndef AV_SPARC_FMAF | |
99 #define AV_SPARC_FMAF 0x0100 /* Sparc64 Fused Multiply-Add */ | |
100 #endif | |
101 if (av & AV_SPARC_ASI_BLK_INIT) features |= blk_init_instructions_m; | |
102 if (av & AV_SPARC_FMAF) features |= fmaf_instructions_m; | |
91 } else { | 103 } else { |
92 // getisax(2) failed, use the old legacy code. | 104 // getisax(2) failed, use the old legacy code. |
93 #ifndef PRODUCT | 105 #ifndef PRODUCT |
94 if (PrintMiscellaneous && Verbose) | 106 if (PrintMiscellaneous && Verbose) |
95 tty->print_cr("getisax(2) not supported."); | 107 tty->print_cr("getisax(2) is not supported."); |
96 #endif | 108 #endif |
97 | 109 |
98 char tmp; | 110 char tmp; |
99 size_t bufsize = sysinfo(SI_ISALIST, &tmp, 1); | 111 size_t bufsize = sysinfo(SI_ISALIST, &tmp, 1); |
100 char* buf = (char*) malloc(bufsize); | 112 char* buf = (char*) malloc(bufsize); |