From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001
From: Duncan Wilkie <antigravityd@gmail.com>
Date: Sat, 18 Nov 2023 06:11:09 -0600
Subject: Initial commit.

---
 gmp-6.3.0/mpn/x86_64/bd1/README | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 gmp-6.3.0/mpn/x86_64/bd1/README

(limited to 'gmp-6.3.0/mpn/x86_64/bd1/README')

diff --git a/gmp-6.3.0/mpn/x86_64/bd1/README b/gmp-6.3.0/mpn/x86_64/bd1/README
new file mode 100644
index 0000000..ccd210e
--- /dev/null
+++ b/gmp-6.3.0/mpn/x86_64/bd1/README
@@ -0,0 +1,11 @@
+This directory contains code for AMD bulldozer including its piledriver update.
+
+We currently make limited use of SIMD instructions, both via the MPN_PATH and
+via inclusion of x86_64/fastsse files.
+
+The bd1 cores share one SIMD/FPU pipeline for two integer units.  This probably
+means that an all-core GMP load (such as a HPC load) might run slower if there
+is significant SIMD dependency.
+
+We should perhaps allow a special 'bd1nosimd' pseudo cpu-name excluding any
+SIMD code.
-- 
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