From: Daniel Engel <gnu@danielengel.com>
To: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>,
gcc-patches@gcc.gnu.org
Cc: Daniel Engel <gnu@danielengel.com>,
Christophe Lyon <christophe.lyon@linaro.org>
Subject: [PATCH v7 07/34] Refactor 'ctz' functions into a new file
Date: Mon, 31 Oct 2022 08:45:02 -0700 [thread overview]
Message-ID: <20221031154529.3627576-8-gnu@danielengel.com> (raw)
In-Reply-To: <20221031154529.3627576-1-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 (__ctzsi2): Moved to ...
* config/arm/ctz2.S: New file.
---
libgcc/config/arm/ctz2.S | 86 +++++++++++++++++++++++++++++++++++
libgcc/config/arm/lib1funcs.S | 65 +-------------------------
2 files changed, 87 insertions(+), 64 deletions(-)
create mode 100644 libgcc/config/arm/ctz2.S
diff --git a/libgcc/config/arm/ctz2.S b/libgcc/config/arm/ctz2.S
new file mode 100644
index 00000000000..1d885dcc71a
--- /dev/null
+++ b/libgcc/config/arm/ctz2.S
@@ -0,0 +1,86 @@
+/* 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_ctzsi2
+#ifdef NOT_ISA_TARGET_32BIT
+FUNC_START ctzsi2
+ negs r1, r0
+ ands r0, r0, r1
+ movs r1, #28
+ movs r3, #1
+ lsls r3, r3, #16
+ cmp r0, r3 /* 0x10000 */
+ bcc 2f
+ lsrs r0, r0, #16
+ subs r1, r1, #16
+2: lsrs r3, r3, #8
+ cmp r0, r3 /* #0x100 */
+ bcc 2f
+ lsrs r0, r0, #8
+ subs r1, r1, #8
+2: lsrs r3, r3, #4
+ cmp r0, r3 /* #0x10 */
+ bcc 2f
+ lsrs r0, r0, #4
+ subs r1, r1, #4
+2: adr r2, 1f
+ ldrb r0, [r2, r0]
+ subs r0, r0, r1
+ bx lr
+.align 2
+1:
+.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
+ FUNC_END ctzsi2
+#else
+ARM_FUNC_START ctzsi2
+ rsb r1, r0, #0
+ and r0, r0, r1
+# if defined (__ARM_FEATURE_CLZ)
+ clz r0, r0
+ rsb r0, r0, #31
+ RET
+# else
+ mov r1, #28
+ cmp r0, #0x10000
+ do_it cs, t
+ movcs r0, r0, lsr #16
+ subcs r1, r1, #16
+ cmp r0, #0x100
+ do_it cs, t
+ movcs r0, r0, lsr #8
+ subcs r1, r1, #8
+ cmp r0, #0x10
+ do_it cs, t
+ movcs r0, r0, lsr #4
+ subcs r1, r1, #4
+ adr r2, 1f
+ ldrb r0, [r2, r0]
+ sub r0, r0, r1
+ RET
+.align 2
+1:
+.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
+# endif /* !defined (__ARM_FEATURE_CLZ) */
+ FUNC_END ctzsi2
+#endif
+#endif /* L_clzsi2 */
+
diff --git a/libgcc/config/arm/lib1funcs.S b/libgcc/config/arm/lib1funcs.S
index 469fea9ab5c..6cf7561835d 100644
--- a/libgcc/config/arm/lib1funcs.S
+++ b/libgcc/config/arm/lib1funcs.S
@@ -1804,70 +1804,7 @@ LSYM(Lover12):
#endif /* __symbian__ */
#include "clz2.S"
-
-#ifdef L_ctzsi2
-#ifdef NOT_ISA_TARGET_32BIT
-FUNC_START ctzsi2
- negs r1, r0
- ands r0, r0, r1
- movs r1, #28
- movs r3, #1
- lsls r3, r3, #16
- cmp r0, r3 /* 0x10000 */
- bcc 2f
- lsrs r0, r0, #16
- subs r1, r1, #16
-2: lsrs r3, r3, #8
- cmp r0, r3 /* #0x100 */
- bcc 2f
- lsrs r0, r0, #8
- subs r1, r1, #8
-2: lsrs r3, r3, #4
- cmp r0, r3 /* #0x10 */
- bcc 2f
- lsrs r0, r0, #4
- subs r1, r1, #4
-2: adr r2, 1f
- ldrb r0, [r2, r0]
- subs r0, r0, r1
- bx lr
-.align 2
-1:
-.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
- FUNC_END ctzsi2
-#else
-ARM_FUNC_START ctzsi2
- rsb r1, r0, #0
- and r0, r0, r1
-# if defined (__ARM_FEATURE_CLZ)
- clz r0, r0
- rsb r0, r0, #31
- RET
-# else
- mov r1, #28
- cmp r0, #0x10000
- do_it cs, t
- movcs r0, r0, lsr #16
- subcs r1, r1, #16
- cmp r0, #0x100
- do_it cs, t
- movcs r0, r0, lsr #8
- subcs r1, r1, #8
- cmp r0, #0x10
- do_it cs, t
- movcs r0, r0, lsr #4
- subcs r1, r1, #4
- adr r2, 1f
- ldrb r0, [r2, r0]
- sub r0, r0, r1
- RET
-.align 2
-1:
-.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
-# endif /* !defined (__ARM_FEATURE_CLZ) */
- FUNC_END ctzsi2
-#endif
-#endif /* L_clzsi2 */
+#include "ctz2.S"
/* ------------------------------------------------------------------------ */
/* These next two sections are here despite the fact that they contain Thumb
--
2.34.1
next prev parent reply other threads:[~2022-10-31 15:46 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 15:44 [PATCH v7 00/34] libgcc: Thumb-1 Floating-Point Assembly for Cortex M0 Daniel Engel
2022-10-31 15:44 ` [PATCH v7 01/34] Add and restructure function declaration macros Daniel Engel
2022-10-31 15:44 ` [PATCH v7 02/34] Rename THUMB_FUNC_START to THUMB_FUNC_ENTRY Daniel Engel
2022-10-31 15:44 ` [PATCH v7 03/34] Fix syntax warnings on conditional instructions Daniel Engel
2022-10-31 15:44 ` [PATCH v7 04/34] Reorganize LIB1ASMFUNCS object wrapper macros Daniel Engel
2022-10-31 15:45 ` [PATCH v7 05/34] Add the __HAVE_FEATURE_IT and IT() macros Daniel Engel
2022-10-31 15:45 ` [PATCH v7 06/34] Refactor 'clz' functions into a new file Daniel Engel
2022-10-31 15:45 ` Daniel Engel [this message]
2022-10-31 15:45 ` [PATCH v7 08/34] Refactor 64-bit shift " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 09/34] Import 'clz' functions from the CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 10/34] Import 'ctz' " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 11/34] Import 64-bit shift " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 12/34] Import 'clrsb' " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 13/34] Import 'ffs' " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 14/34] Import 'parity' " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 15/34] Import 'popcnt' " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 16/34] Refactor Thumb-1 64-bit comparison into a new file Daniel Engel
2022-10-31 15:45 ` [PATCH v7 17/34] Import 64-bit comparison from CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 18/34] Merge Thumb-2 optimizations for 64-bit comparison Daniel Engel
2022-10-31 15:45 ` [PATCH v7 19/34] Import 32-bit division from the CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 20/34] Refactor Thumb-1 64-bit division into a new file Daniel Engel
2022-10-31 15:45 ` [PATCH v7 21/34] Import 64-bit division from the CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 22/34] Import integer multiplication " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 23/34] Refactor Thumb-1 float comparison into a new file Daniel Engel
2022-10-31 15:45 ` [PATCH v7 24/34] Import float comparison from the CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 25/34] Refactor Thumb-1 float subtraction into a new file Daniel Engel
2022-10-31 15:45 ` [PATCH v7 26/34] Import float addition and subtraction from the CM0 library Daniel Engel
2022-10-31 15:45 ` [PATCH v7 27/34] Import float multiplication " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 28/34] Import float division " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 29/34] Import integer-to-float conversion " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 30/34] Import float-to-integer " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 31/34] Import float<->double " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 32/34] Import float<->__fp16 " Daniel Engel
2022-10-31 15:45 ` [PATCH v7 33/34] Drop single-precision Thumb-1 soft-float functions Daniel Engel
2022-10-31 15:45 ` [PATCH v7 34/34] Add -mpure-code support to the CM0 functions Daniel Engel
2022-11-15 15:27 ` [PING] Re: [PATCH v7 00/34] libgcc: Thumb-1 Floating-Point Assembly for Cortex M0 Daniel Engel
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