diff --git a/src/cpu/softfloat3e/CMakeLists.txt b/src/cpu/softfloat3e/CMakeLists.txt
index 66a4287ca..9f9ae0679 100644
--- a/src/cpu/softfloat3e/CMakeLists.txt
+++ b/src/cpu/softfloat3e/CMakeLists.txt
@@ -13,7 +13,8 @@
 #          Copyright 2020-2021 David Hrdlička.
 #
 
-add_library(softfloat3e OBJECT softfloat-specialize.c extF80_addsub.cc extF80_class.cc extF80_compare.cc
+add_library(softfloat3e OBJECT primitives.c softfloat-specialize.c
+    extF80_addsub.cc extF80_class.cc extF80_compare.cc
     extF80_div.cc extF80_extract.cc extF80_mul.cc extF80_rem.cc extF80_roundToInt.cc
     extF80_scale.cc extF80_sqrt.cc extF80_to_f16.cc extF80_to_f32.cc extF80_to_f64.cc
     extF80_to_f128.cc extF80_to_i32.cc extF80_to_i32_r_minMag.cc extF80_to_i64.cc
diff --git a/src/cpu/softfloat3e/primitives.c b/src/cpu/softfloat3e/primitives.c
new file mode 100644
index 000000000..ba5afb76a
--- /dev/null
+++ b/src/cpu/softfloat3e/primitives.c
@@ -0,0 +1,50 @@
+/*============================================================================
+
+This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3e, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the
+University of California.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions, and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions, and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ 3. Neither the name of the University nor the names of its contributors may
+    be used to endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
+DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+=============================================================================*/
+
+#include "primitives.h"
+
+/*----------------------------------------------------------------------------
+| This function is the same as 'softfloat_shiftRightJam128Extra' (below),
+| except that 'dist' must be in the range 1 to 63.
+*----------------------------------------------------------------------------*/
+struct uint128_extra softfloat_shortShiftRightJam128Extra(uint64_t a64, uint64_t a0, uint64_t extra, uint8_t dist)
+{
+    uint8_t negDist = -dist;
+    struct uint128_extra z;
+    z.v.v64 = a64>>dist;
+    z.v.v0 = a64<<(negDist & 63) | a0>>dist;
+    z.extra = a0<<(negDist & 63) | (extra != 0);
+    return z;
+}
diff --git a/src/cpu/softfloat3e/primitives.h b/src/cpu/softfloat3e/primitives.h
index 993067996..3c811838e 100644
--- a/src/cpu/softfloat3e/primitives.h
+++ b/src/cpu/softfloat3e/primitives.h
@@ -283,15 +283,7 @@ struct uint128 softfloat_shortShiftRightJam128(uint64_t a64, uint64_t a0, uint8_
 | This function is the same as 'softfloat_shiftRightJam128Extra' (below),
 | except that 'dist' must be in the range 1 to 63.
 *----------------------------------------------------------------------------*/
-struct uint128_extra softfloat_shortShiftRightJam128Extra(uint64_t a64, uint64_t a0, uint64_t extra, uint8_t dist)
-{
-    uint8_t negDist = -dist;
-    struct uint128_extra z;
-    z.v.v64 = a64>>dist;
-    z.v.v0 = a64<<(negDist & 63) | a0>>dist;
-    z.extra = a0<<(negDist & 63) | (extra != 0);
-    return z;
-}
+extern struct uint128_extra softfloat_shortShiftRightJam128Extra(uint64_t a64, uint64_t a0, uint64_t extra, uint8_t dist);
 
 /*----------------------------------------------------------------------------
 | Shifts the 128 bits formed by concatenating 'a' and 'extra' right by 64