[PATCH v7 08/34] Refactor 64-bit shift functions into a new file

[Daniel Engel <gnu@danielengel.com>]

This will make it easier to isolate changes in subsequent patches.

gcc/libgcc/ChangeLog:
2022-10-09 Daniel Engel <gnu@danielengel.com>

	* config/arm/lib1funcs.S (__ashldi3, __ashrdi3, __lshldi3): Moved to ...
	* config/arm/eabi/lshift.S: New file.
---
 libgcc/config/arm/eabi/lshift.S | 123 ++++++++++++++++++++++++++++++++
 libgcc/config/arm/lib1funcs.S   | 103 +-------------------------
 2 files changed, 124 insertions(+), 102 deletions(-)
 create mode 100644 libgcc/config/arm/eabi/lshift.S

diff --git a/libgcc/config/arm/eabi/lshift.S b/libgcc/config/arm/eabi/lshift.S
new file mode 100644
index 00000000000..6e79d96c118
--- /dev/null
+++ b/libgcc/config/arm/eabi/lshift.S
@@ -0,0 +1,123 @@
+/* Copyright (C) 1995-2022 Free Software Foundation, Inc.
+
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3, or (at your option) any
+later version.
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+#ifdef L_lshrdi3
+
+	FUNC_START lshrdi3
+	FUNC_ALIAS aeabi_llsr lshrdi3
+	
+#ifdef __thumb__
+	lsrs	al, r2
+	movs	r3, ah
+	lsrs	ah, r2
+	mov	ip, r3
+	subs	r2, #32
+	lsrs	r3, r2
+	orrs	al, r3
+	negs	r2, r2
+	mov	r3, ip
+	lsls	r3, r2
+	orrs	al, r3
+	RET
+#else
+	subs	r3, r2, #32
+	rsb	ip, r2, #32
+	movmi	al, al, lsr r2
+	movpl	al, ah, lsr r3
+	orrmi	al, al, ah, lsl ip
+	mov	ah, ah, lsr r2
+	RET
+#endif
+	FUNC_END aeabi_llsr
+	FUNC_END lshrdi3
+
+#endif
+	
+#ifdef L_ashrdi3
+	
+	FUNC_START ashrdi3
+	FUNC_ALIAS aeabi_lasr ashrdi3
+	
+#ifdef __thumb__
+	lsrs	al, r2
+	movs	r3, ah
+	asrs	ah, r2
+	subs	r2, #32
+	@ If r2 is negative at this point the following step would OR
+	@ the sign bit into all of AL.  That's not what we want...
+	bmi	1f
+	mov	ip, r3
+	asrs	r3, r2
+	orrs	al, r3
+	mov	r3, ip
+1:
+	negs	r2, r2
+	lsls	r3, r2
+	orrs	al, r3
+	RET
+#else
+	subs	r3, r2, #32
+	rsb	ip, r2, #32
+	movmi	al, al, lsr r2
+	movpl	al, ah, asr r3
+	orrmi	al, al, ah, lsl ip
+	mov	ah, ah, asr r2
+	RET
+#endif
+
+	FUNC_END aeabi_lasr
+	FUNC_END ashrdi3
+
+#endif
+
+#ifdef L_ashldi3
+
+	FUNC_START ashldi3
+	FUNC_ALIAS aeabi_llsl ashldi3
+	
+#ifdef __thumb__
+	lsls	ah, r2
+	movs	r3, al
+	lsls	al, r2
+	mov	ip, r3
+	subs	r2, #32
+	lsls	r3, r2
+	orrs	ah, r3
+	negs	r2, r2
+	mov	r3, ip
+	lsrs	r3, r2
+	orrs	ah, r3
+	RET
+#else
+	subs	r3, r2, #32
+	rsb	ip, r2, #32
+	movmi	ah, ah, lsl r2
+	movpl	ah, al, lsl r3
+	orrmi	ah, ah, al, lsr ip
+	mov	al, al, lsl r2
+	RET
+#endif
+	FUNC_END aeabi_llsl
+	FUNC_END ashldi3
+
+#endif
+
diff --git a/libgcc/config/arm/lib1funcs.S b/libgcc/config/arm/lib1funcs.S
index 6cf7561835d..aa5957b8399 100644
--- a/libgcc/config/arm/lib1funcs.S
+++ b/libgcc/config/arm/lib1funcs.S
@@ -1699,108 +1699,7 @@ LSYM(Lover12):
 
 /* Prevent __aeabi double-word shifts from being produced on SymbianOS.  */
 #ifndef __symbian__
-
-#ifdef L_lshrdi3
-
-	FUNC_START lshrdi3
-	FUNC_ALIAS aeabi_llsr lshrdi3
-	
-#ifdef __thumb__
-	lsrs	al, r2
-	movs	r3, ah
-	lsrs	ah, r2
-	mov	ip, r3
-	subs	r2, #32
-	lsrs	r3, r2
-	orrs	al, r3
-	negs	r2, r2
-	mov	r3, ip
-	lsls	r3, r2
-	orrs	al, r3
-	RET
-#else
-	subs	r3, r2, #32
-	rsb	ip, r2, #32
-	movmi	al, al, lsr r2
-	movpl	al, ah, lsr r3
-	orrmi	al, al, ah, lsl ip
-	mov	ah, ah, lsr r2
-	RET
-#endif
-	FUNC_END aeabi_llsr
-	FUNC_END lshrdi3
-
-#endif
-	
-#ifdef L_ashrdi3
-	
-	FUNC_START ashrdi3
-	FUNC_ALIAS aeabi_lasr ashrdi3
-	
-#ifdef __thumb__
-	lsrs	al, r2
-	movs	r3, ah
-	asrs	ah, r2
-	subs	r2, #32
-	@ If r2 is negative at this point the following step would OR
-	@ the sign bit into all of AL.  That's not what we want...
-	bmi	1f
-	mov	ip, r3
-	asrs	r3, r2
-	orrs	al, r3
-	mov	r3, ip
-1:
-	negs	r2, r2
-	lsls	r3, r2
-	orrs	al, r3
-	RET
-#else
-	subs	r3, r2, #32
-	rsb	ip, r2, #32
-	movmi	al, al, lsr r2
-	movpl	al, ah, asr r3
-	orrmi	al, al, ah, lsl ip
-	mov	ah, ah, asr r2
-	RET
-#endif
-
-	FUNC_END aeabi_lasr
-	FUNC_END ashrdi3
-
-#endif
-
-#ifdef L_ashldi3
-
-	FUNC_START ashldi3
-	FUNC_ALIAS aeabi_llsl ashldi3
-	
-#ifdef __thumb__
-	lsls	ah, r2
-	movs	r3, al
-	lsls	al, r2
-	mov	ip, r3
-	subs	r2, #32
-	lsls	r3, r2
-	orrs	ah, r3
-	negs	r2, r2
-	mov	r3, ip
-	lsrs	r3, r2
-	orrs	ah, r3
-	RET
-#else
-	subs	r3, r2, #32
-	rsb	ip, r2, #32
-	movmi	ah, ah, lsl r2
-	movpl	ah, al, lsl r3
-	orrmi	ah, ah, al, lsr ip
-	mov	al, al, lsl r2
-	RET
-#endif
-	FUNC_END aeabi_llsl
-	FUNC_END ashldi3
-
-#endif
-
+#include "eabi/lshift.S"
 #endif /* __symbian__ */
 
 #include "clz2.S"
-- 
2.34.1