File 6541-Optimize-bignum-arithmetic-on-64-bit-platf... of Package erlang

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File 6541-Optimize-bignum-arithmetic-on-64-bit-platforms.patch of Package erlang

From b9e1377c5547eb87a9e36f635b1187ff06493d39 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Mon, 19 Jun 2023 05:48:02 +0200
Subject: [PATCH 1/6] Optimize bignum arithmetic on 64-bit platforms

When compiling 64-bit programs, goth gcc and clang support an 128-bit
unsigned integer type. Using it to define the `ErtsDoubleDigit` type
will speed up multiplication and division.
---
 erts/emulator/beam/big.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/erts/emulator/beam/big.h b/erts/emulator/beam/big.h
index b2320f59ac..e04749417f 100644
--- a/erts/emulator/beam/big.h
+++ b/erts/emulator/beam/big.h
@@ -37,8 +37,11 @@ typedef Uint16   ErtsHalfDigit;
 #undef  BIG_HAVE_DOUBLE_DIGIT
 typedef Uint16   ErtsHalfDigit;
 
+#elif (SIZEOF_VOID_P == 8) && defined(__GNUC__) && (__GNUC__ >= 4)
+typedef __uint128_t ErtsDoubleDigit;
+#define BIG_HAVE_DOUBLE_DIGIT 1
+
 #elif (SIZEOF_VOID_P == 8)
-/* Assume 64-bit machine, does it exist 128 bit long long long ? */
 #undef  BIG_HAVE_DOUBLE_DIGIT
 typedef Uint32   ErtsHalfDigit;
 #else
-- 
2.35.3

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File 6541-Optimize-bignum-arithmetic-on-64-bit-platforms.patch of Package erlang

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