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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/webkit/PerformanceTests/SunSpider/sunspider-0.9.1/bitops-3bit-bits-in-byte.js | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
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.js | 32 |
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);
|