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-rw-r--r--libc/string/microblaze/memmove.S348
1 files changed, 348 insertions, 0 deletions
diff --git a/libc/string/microblaze/memmove.S b/libc/string/microblaze/memmove.S
new file mode 100644
index 000000000..29233f566
--- /dev/null
+++ b/libc/string/microblaze/memmove.S
@@ -0,0 +1,348 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2008 Jim Law - Iris LP All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Jim Law <jlaw@irispower.com>
+ *
+ * intended to replace:
+ * memcpy in memcpy.c and
+ * memmove in memmove.c
+ * ... in arch/microblaze/lib
+ *
+ *
+ * assly_fastcopy.S
+ *
+ * Attempt at quicker memcpy and memmove for MicroBlaze
+ * Input : Operand1 in Reg r5 - destination address
+ * Operand2 in Reg r6 - source address
+ * Operand3 in Reg r7 - number of bytes to transfer
+ * Output: Result in Reg r3 - starting destinaition address
+ *
+ *
+ * Explanation:
+ * Perform (possibly unaligned) copy of a block of memory
+ * between mem locations with size of xfer spec'd in bytes
+ */
+
+ .globl memmove
+ .type memmove, @function
+ .ent memmove
+
+memmove:
+ cmpu r4, r5, r6 /* n = s - d */
+ bgei r4, HIDDEN_JUMPTARGET(memcpy)
+
+fast_memcpy_descending:
+ /* move d to return register as value of function */
+ addi r3, r5, 0
+
+ add r5, r5, r7 /* d = d + c */
+ add r6, r6, r7 /* s = s + c */
+
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
+
+ /* transfer first 0~3 bytes to get aligned dest address */
+ andi r4, r5, 3 /* n = d & 3 */
+ /* if zero, destination already aligned */
+ beqi r4,d_dalign_done
+ rsub r7, r4, r7 /* c = c - n adjust c */
+
+d_xfer_first_loop:
+ /* if no bytes left to transfer, transfer the bulk */
+ beqi r4,d_dalign_done
+ addi r6, r6, -1 /* s-- */
+ addi r5, r5, -1 /* d-- */
+ lbui r11, r6, 0 /* h = *s */
+ sbi r11, r5, 0 /* *d = h */
+ brid d_xfer_first_loop /* loop */
+ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
+
+d_dalign_done:
+ addi r4, r0, 32 /* n = 32 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ /* if n < 0, less than one block to transfer */
+ blti r4, d_block_done
+
+d_block_xfer:
+ andi r4, r7, 0xffffffe0 /* n = c & ~31 */
+ rsub r7, r4, r7 /* c = c - n */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, d_block_unaligned
+
+d_block_aligned:
+ addi r6, r6, -32 /* s = s - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r9, r6, 28 /* t1 = *(s + 28) */
+ lwi r10, r6, 24 /* t2 = *(s + 24) */
+ lwi r11, r6, 20 /* t3 = *(s + 20) */
+ lwi r12, r6, 16 /* t4 = *(s + 16) */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ swi r10, r5, 24 /* *(d + 24) = t2 */
+ swi r11, r5, 20 /* *(d + 20) = t3 */
+ swi r12, r5, 16 /* *(d + 16) = t4 */
+ lwi r9, r6, 12 /* t1 = *(s + 12) */
+ lwi r10, r6, 8 /* t2 = *(s + 8) */
+ lwi r11, r6, 4 /* t3 = *(s + 4) */
+ lwi r12, r6, 0 /* t4 = *(s + 0) */
+ swi r9, r5, 12 /* *(d + 12) = t1 */
+ swi r10, r5, 8 /* *(d + 8) = t2 */
+ swi r11, r5, 4 /* *(d + 4) = t3 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_block_aligned /* while (n) loop */
+ swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ rsub r6, r4, r6 /* s = s - n */
+ lwi r11, r8, 0 /* h = *(as + 0) */
+
+ addi r9, r9, -1
+ beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */
+
+d_block_u3:
+ bsrli r11, r11, 8 /* h = h >> 8 */
+d_bu3_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu3_loop /* while (n) loop */
+ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_u1:
+ bsrli r11, r11, 24 /* h = h >> 24 */
+d_bu1_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu1_loop /* while (n) loop */
+ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_u2:
+ bsrli r11, r11, 16 /* h = h >> 16 */
+d_bu2_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu2_loop /* while (n) loop */
+ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
+
+d_block_done:
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
+
+d_word_xfer:
+ andi r4, r7, 0xfffffffc /* n = c & ~3 */
+ rsub r5, r4, r5 /* d = d - n */
+ rsub r6, r4, r6 /* s = s - n */
+ rsub r7, r4, r7 /* c = c - n */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, d_word_unaligned
+
+d_word_aligned:
+ addi r4, r4,-4 /* n-- */
+ lw r9, r6, r4 /* t1 = *(s+n) */
+ bneid r4, d_word_aligned /* loop */
+ sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ lw r11, r8, r4 /* h = *(as + n) */
+
+ addi r9, r9, -1
+ beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */
+
+d_word_u3:
+ bsrli r11, r11, 8 /* h = h >> 8 */
+d_wu3_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu3_loop /* while (n) loop */
+ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_u1:
+ bsrli r11, r11, 24 /* h = h >> 24 */
+d_wu1_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu1_loop /* while (n) loop */
+ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_u2:
+ bsrli r11, r11, 16 /* h = h >> 16 */
+d_wu2_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu2_loop /* while (n) loop */
+ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
+
+d_word_done:
+
+d_xfer_end:
+d_xfer_end_loop:
+ beqi r7, a_done /* while (c) */
+ addi r6, r6, -1 /* s-- */
+ lbui r9, r6, 0 /* t1 = *s */
+ addi r5, r5, -1 /* d-- */
+ sbi r9, r5, 0 /* *d = t1 */
+ brid d_xfer_end_loop /* loop */
+ addi r7, r7, -1 /* c-- (IN DELAY SLOT) */
+
+a_done:
+d_done:
+ rtsd r15, 8
+ nop
+
+.size memmove, . - memmove
+.end memmove
+libc_hidden_def(memmove)
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 10:41:49 +0000