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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 14:29:10 +0000
commit2aa4a82499d4becd2284cdb482213d541b8804dd (patch)
treeb80bf8bf13c3766139fbacc530efd0dd9d54394c /third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
firefox-upstream.zip
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js')
-rw-r--r--third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js32
1 files changed, 32 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js b/third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js
new file mode 100644
index 0000000000..d9f492f759
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js
@@ -0,0 +1,32 @@
+// Copyright (c) 2004 by Arthur Langereis (arthur_ext at domain xfinitegames, tld com
+
+// 1 op = 6 ANDs, 3 SHRs, 3 SHLs, 4 assigns, 2 ADDs
+// O(1)
+function fast3bitlookup(b) {
+var c, bi3b = 0xE994; // 0b1110 1001 1001 0100; // 3 2 2 1 2 1 1 0
+c = 3 & (bi3b >> ((b << 1) & 14));
+c += 3 & (bi3b >> ((b >> 2) & 14));
+c += 3 & (bi3b >> ((b >> 5) & 6));
+return c;
+
+/*
+lir4,0xE994; 9 instructions, no memory access, minimal register dependence, 6 shifts, 2 adds, 1 inline assign
+rlwinmr5,r3,1,28,30
+rlwinmr6,r3,30,28,30
+rlwinmr7,r3,27,29,30
+rlwnmr8,r4,r5,30,31
+rlwnmr9,r4,r6,30,31
+rlwnmr10,r4,r7,30,31
+addr3,r8,r9
+addr3,r3,r10
+*/
+}
+
+
+function TimeFunc(func) {
+var x, y, t;
+for(var x=0; x<500; x++)
+for(var y=0; y<256; y++) func(y);
+}
+
+TimeFunc(fast3bitlookup);