From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- js/src/jit/arm/gen-double-encoder-table.py | 35 ++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 js/src/jit/arm/gen-double-encoder-table.py (limited to 'js/src/jit/arm/gen-double-encoder-table.py') diff --git a/js/src/jit/arm/gen-double-encoder-table.py b/js/src/jit/arm/gen-double-encoder-table.py new file mode 100644 index 0000000000..fd622da82e --- /dev/null +++ b/js/src/jit/arm/gen-double-encoder-table.py @@ -0,0 +1,35 @@ +#!/usr/bin/env python +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. +"""Generate tables of immediately-encodable VFP doubles. + +DOES NOT get automatically run during the build process. If you need to +modify this file (which is unlikely), you must re-run this script: + +python gen-double-encode-table.py > $(topsrcdir)/path/to/DoubleEntryTable.tbl +""" + +import operator + + +def rep(bit, count): + return reduce(operator.ior, [bit << c for c in range(count)]) + + +def encodeDouble(value): + """Generate an ARM ARM 'VFP modified immediate constant' with format: + aBbbbbbb bbcdefgh 000... + + We will return the top 32 bits of the double; the rest are 0.""" + assert (0 <= value) and (value <= 255) + a = value >> 7 + b = (value >> 6) & 1 + B = int(b == 0) + cdefgh = value & 0x3F + return (a << 31) | (B << 30) | (rep(b, 8) << 22) | cdefgh << 16 + + +print("/* THIS FILE IS AUTOMATICALLY GENERATED BY gen-double-encode-table.py. */") +for i in range(256): + print(" { 0x%08x, { %d, %d, 0 } }," % (encodeDouble(i), i & 0xF, i >> 4)) -- cgit v1.2.3