From: Daniel Engel <g...@danielengel.com>
gcc/libgcc/ChangeLog:
2021-01-07 Daniel Engel <g...@danielengel.com>
* config/arm/lib1funcs.S: Move __ctzsi2() to
* config/arm/bits/ctz2.S: New file.
---
libgcc/config/arm/bits/ctz2.S | 65 +++++++++++++++++++++++++++++++++++
libgcc/config/arm/lib1funcs.S | 65 +----------------------------------
2 files changed, 66 insertions(+), 64 deletions(-)
create mode 100644 libgcc/config/arm/bits/ctz2.S
diff --git a/libgcc/config/arm/bits/ctz2.S b/libgcc/config/arm/bits/ctz2.S
new file mode 100644
index 00000000000..f0422d1fbba
--- /dev/null
+++ b/libgcc/config/arm/bits/ctz2.S
@@ -0,0 +1,65 @@
+
+#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 f5aa5505e9d..acafff62448 100644
--- a/libgcc/config/arm/lib1funcs.S
+++ b/libgcc/config/arm/lib1funcs.S
@@ -1723,70 +1723,7 @@ LSYM(Lover12):
#endif /* __symbian__ */
#include "bits/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 "bits/ctz2.S"
/* ------------------------------------------------------------------------ */
/* These next two sections are here despite the fact that they contain Thumb
--
2.25.1
