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-rw-r--r--libc/string/arc/arcv2/memcpy.S236
-rw-r--r--libc/string/arc/arcv2/memset.S85
-rw-r--r--libc/string/arc/arcv2/strcmp.S83
3 files changed, 404 insertions, 0 deletions
diff --git a/libc/string/arc/arcv2/memcpy.S b/libc/string/arc/arcv2/memcpy.S
new file mode 100644
index 000000000..7573daf51
--- /dev/null
+++ b/libc/string/arc/arcv2/memcpy.S
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <sysdep.h>
+
+#ifdef __LITTLE_ENDIAN__
+# define SHIFT_1(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define SHIFT_2(RX,RY,IMM) lsr RX, RY, IMM ; >>
+# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM
+# define MERGE_2(RX,RY,IMM)
+# define EXTRACT_1(RX,RY,IMM) and RX, RY, 0xFFFF
+# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, IMM
+#else
+# define SHIFT_1(RX,RY,IMM) lsr RX, RY, IMM ; >>
+# define SHIFT_2(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define MERGE_1(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define MERGE_2(RX,RY,IMM) asl RX, RY, IMM ; <<
+# define EXTRACT_1(RX,RY,IMM) lsr RX, RY, IMM
+# define EXTRACT_2(RX,RY,IMM) lsr RX, RY, 0x08
+#endif
+
+#ifdef __LL64__
+# define PREFETCH_READ(RX) prefetch [RX, 56]
+# define PREFETCH_WRITE(RX) prefetchw [RX, 64]
+# define LOADX(DST,RX) ldd.ab DST, [RX, 8]
+# define STOREX(SRC,RX) std.ab SRC, [RX, 8]
+# define ZOLSHFT 5
+# define ZOLAND 0x1F
+#else
+# define PREFETCH_READ(RX) prefetch [RX, 28]
+# define PREFETCH_WRITE(RX) prefetchw [RX, 32]
+# define LOADX(DST,RX) ld.ab DST, [RX, 4]
+# define STOREX(SRC,RX) st.ab SRC, [RX, 4]
+# define ZOLSHFT 4
+# define ZOLAND 0xF
+#endif
+
+ENTRY(memcpy)
+ prefetch [r1] ; Prefetch the read location
+ prefetchw [r0] ; Prefetch the write location
+ mov.f 0, r2
+;;; if size is zero
+ jz.d [blink]
+ mov r3, r0 ; don't clobber ret val
+
+;;; if size <= 8
+ cmp r2, 8
+ bls.d @.Lsmallchunk
+ mov.f lp_count, r2
+
+ and.f r4, r0, 0x03
+ rsub lp_count, r4, 4
+ lpnz @.Laligndestination
+ ;; LOOP BEGIN
+ ldb.ab r5, [r1,1]
+ sub r2, r2, 1
+ stb.ab r5, [r3,1]
+.Laligndestination:
+
+;;; Check the alignment of the source
+ and.f r4, r1, 0x03
+ bnz.d @.Lsourceunaligned
+
+;;; CASE 0: Both source and destination are 32bit aligned
+;;; Convert len to Dwords, unfold x4
+ lsr.f lp_count, r2, ZOLSHFT
+ lpnz @.Lcopy32_64bytes
+ ;; LOOP START
+ LOADX (r6, r1)
+ PREFETCH_READ (r1)
+ PREFETCH_WRITE (r3)
+ LOADX (r8, r1)
+ LOADX (r10, r1)
+ LOADX (r4, r1)
+ STOREX (r6, r3)
+ STOREX (r8, r3)
+ STOREX (r10, r3)
+ STOREX (r4, r3)
+.Lcopy32_64bytes:
+
+ and.f lp_count, r2, ZOLAND ;Last remaining 31 bytes
+.Lsmallchunk:
+ lpnz @.Lcopyremainingbytes
+ ;; LOOP START
+ ldb.ab r5, [r1,1]
+ stb.ab r5, [r3,1]
+.Lcopyremainingbytes:
+
+ j [blink]
+;;; END CASE 0
+
+.Lsourceunaligned:
+ cmp r4, 2
+ beq.d @.LunalignedOffby2
+ sub r2, r2, 1
+
+ bhi.d @.LunalignedOffby3
+ ldb.ab r5, [r1, 1]
+
+;;; CASE 1: The source is unaligned, off by 1
+ ;; Hence I need to read 1 byte for a 16bit alignment
+ ;; and 2bytes to reach 32bit alignment
+ ldh.ab r6, [r1, 2]
+ sub r2, r2, 2
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+ MERGE_1 (r6, r6, 8)
+ MERGE_2 (r5, r5, 24)
+ or r5, r5, r6
+
+ ;; Both src and dst are aligned
+ lpnz @.Lcopy8bytes_1
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetchw [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 24)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 8)
+
+ SHIFT_1 (r9, r8, 24)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 8)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+.Lcopy8bytes_1:
+
+ ;; Write back the remaining 16bits
+ EXTRACT_1 (r6, r5, 16)
+ sth.ab r6, [r3, 2]
+ ;; Write back the remaining 8bits
+ EXTRACT_2 (r5, r5, 16)
+ stb.ab r5, [r3, 1]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @.Lcopybytewise_1
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+.Lcopybytewise_1:
+ j [blink]
+
+.LunalignedOffby2:
+;;; CASE 2: The source is unaligned, off by 2
+ ldh.ab r5, [r1, 2]
+ sub r2, r2, 1
+
+ ;; Both src and dst are aligned
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+#ifdef __BIG_ENDIAN__
+ asl.nz r5, r5, 16
+#endif
+ lpnz @.Lcopy8bytes_2
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetchw [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 16)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 16)
+
+ SHIFT_1 (r9, r8, 16)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 16)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+.Lcopy8bytes_2:
+
+#ifdef __BIG_ENDIAN__
+ lsr.nz r5, r5, 16
+#endif
+ sth.ab r5, [r3, 2]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @.Lcopybytewise_2
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+.Lcopybytewise_2:
+ j [blink]
+
+.LunalignedOffby3:
+;;; CASE 3: The source is unaligned, off by 3
+;;; Hence, I need to read 1byte for achieve the 32bit alignment
+
+ ;; Both src and dst are aligned
+ ;; Convert to words, unfold x2
+ lsr.f lp_count, r2, 3
+#ifdef __BIG_ENDIAN__
+ asl.ne r5, r5, 24
+#endif
+ lpnz @.Lcopy8bytes_3
+ ;; LOOP START
+ ld.ab r6, [r1, 4]
+ prefetch [r1, 28] ;Prefetch the next read location
+ ld.ab r8, [r1,4]
+ prefetchw [r3, 32] ;Prefetch the next write location
+
+ SHIFT_1 (r7, r6, 8)
+ or r7, r7, r5
+ SHIFT_2 (r5, r6, 24)
+
+ SHIFT_1 (r9, r8, 8)
+ or r9, r9, r5
+ SHIFT_2 (r5, r8, 24)
+
+ st.ab r7, [r3, 4]
+ st.ab r9, [r3, 4]
+.Lcopy8bytes_3:
+
+#ifdef __BIG_ENDIAN__
+ lsr.nz r5, r5, 24
+#endif
+ stb.ab r5, [r3, 1]
+
+ and.f lp_count, r2, 0x07 ;Last 8bytes
+ lpnz @.Lcopybytewise_3
+ ;; LOOP START
+ ldb.ab r6, [r1,1]
+ stb.ab r6, [r3,1]
+.Lcopybytewise_3:
+ j [blink]
+
+END(memcpy)
+libc_hidden_def(memcpy)
diff --git a/libc/string/arc/arcv2/memset.S b/libc/string/arc/arcv2/memset.S
new file mode 100644
index 000000000..d076ad1cd
--- /dev/null
+++ b/libc/string/arc/arcv2/memset.S
@@ -0,0 +1,85 @@
+
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <sysdep.h>
+
+#ifdef DONT_USE_PREALLOC
+#define PREWRITE(A,B) prefetchw [(A),(B)]
+#else
+#define PREWRITE(A,B) prealloc [(A),(B)]
+#endif
+
+ENTRY(memset)
+ prefetchw [r0] ; Prefetch the write location
+ mov.f 0, r2
+;;; if size is zero
+ jz.d [blink]
+ mov r3, r0 ; don't clobber ret val
+
+;;; if length < 8
+ brls.d.nt r2, 8, .Lsmallchunk
+ mov.f lp_count,r2
+
+ and.f r4, r0, 0x03
+ rsub lp_count, r4, 4
+ lpnz @.Laligndestination
+ ;; LOOP BEGIN
+ stb.ab r1, [r3,1]
+ sub r2, r2, 1
+.Laligndestination:
+
+;;; Destination is aligned
+ and r1, r1, 0xFF
+ asl r4, r1, 8
+ or r4, r4, r1
+ asl r5, r4, 16
+ or r5, r5, r4
+ mov r4, r5
+
+ sub3 lp_count, r2, 8
+ cmp r2, 64
+ bmsk.hi r2, r2, 5
+ mov.ls lp_count, 0
+ add3.hi r2, r2, 8
+
+;;; Convert len to Dwords, unfold x8
+ lsr.f lp_count, lp_count, 6
+ lpnz @.Lset64bytes
+ ;; LOOP START
+ PREWRITE(r3, 64) ;Prefetch the next write location
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+.Lset64bytes:
+
+ lsr.f lp_count, r2, 5 ;Last remaining max 124 bytes
+ lpnz .Lset32bytes
+ ;; LOOP START
+ prefetchw [r3, 32] ;Prefetch the next write location
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+ std.ab r4, [r3, 8]
+.Lset32bytes:
+
+ and.f lp_count, r2, 0x1F ;Last remaining 31 bytes
+.Lsmallchunk:
+ lpnz .Lcopy3bytes
+ ;; LOOP START
+ stb.ab r1, [r3, 1]
+.Lcopy3bytes:
+
+ j [blink]
+
+END(memset)
+libc_hidden_def(memset)
diff --git a/libc/string/arc/arcv2/strcmp.S b/libc/string/arc/arcv2/strcmp.S
new file mode 100644
index 000000000..2e0e64a0c
--- /dev/null
+++ b/libc/string/arc/arcv2/strcmp.S
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <sysdep.h>
+
+ENTRY(strcmp)
+ or r2, r0, r1
+ bmsk_s r2, r2, 1
+ brne r2, 0, @.Lcharloop
+
+;;; s1 and s2 are word aligned
+ ld.ab r2, [r0, 4]
+
+ mov_s r12, 0x01010101
+ ror r11, r12
+ .align 4
+.LwordLoop:
+ ld.ab r3, [r1, 4]
+ ;; Detect NULL char in str1
+ sub r4, r2, r12
+ ld.ab r5, [r0, 4]
+ bic r4, r4, r2
+ and r4, r4, r11
+ brne.d.nt r4, 0, .LfoundNULL
+ ;; Check if the read locations are the same
+ cmp r2, r3
+ beq.d .LwordLoop
+ mov.eq r2, r5
+
+ ;; A match is found, spot it out
+#ifdef __LITTLE_ENDIAN__
+ swape r3, r3
+ mov_s r0, 1
+ swape r2, r2
+#else
+ mov_s r0, 1
+#endif
+ cmp_s r2, r3
+ j_s.d [blink]
+ bset.lo r0, r0, 31
+
+ .align 4
+.LfoundNULL:
+#ifdef __BIG_ENDIAN__
+ swape r4, r4
+ swape r2, r2
+ swape r3, r3
+#endif
+ ;; Find null byte
+ ffs r0, r4
+ bmsk r2, r2, r0
+ bmsk r3, r3, r0
+ swape r2, r2
+ swape r3, r3
+ ;; make the return value
+ sub.f r0, r2, r3
+ mov.hi r0, 1
+ j_s.d [blink]
+ bset.lo r0, r0, 31
+
+ .align 4
+.Lcharloop:
+ ldb.ab r2, [r0, 1]
+ ldb.ab r3, [r1, 1]
+ nop
+ breq r2, 0, .Lcmpend
+ breq r2, r3, .Lcharloop
+
+ .align 4
+.Lcmpend:
+ j_s.d [blink]
+ sub r0, r2, r3
+END(strcmp)
+libc_hidden_def(strcmp)
+
+#ifndef __UCLIBC_HAS_LOCALE__
+strong_alias(strcmp,strcoll)
+libc_hidden_def(strcoll)
+#endif
generated by cgit v1.2.3 (git 2.46.0) at 2025-11-04 04:06:54 +0000