/* * 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 */ #include <linux/linkage.h> .text .globl memcpy .type memcpy, @function .ent memcpy memcpy: fast_memcpy_ascending: /* move d to return register as value of function */ addi r3, r5, 0 addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4, a_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, a_dalign_done /* n = 4 - n (yields 3, 2, 1 transfers for 1, 2, 3 addr offset) */ rsubi r4, r4, 4 rsub r7, r4, r7 /* c = c - n adjust c */ a_xfer_first_loop: /* if no bytes left to transfer, transfer the bulk */ beqi r4, a_dalign_done lbui r11, r6, 0 /* h = *s */ sbi r11, r5, 0 /* *d = h */ addi r6, r6, 1 /* s++ */ addi r5, r5, 1 /* d++ */ brid a_xfer_first_loop /* loop */ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */ a_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, a_block_done a_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, a_block_unaligned a_block_aligned: lwi r9, r6, 0 /* t1 = *(s + 0) */ lwi r10, r6, 4 /* t2 = *(s + 4) */ lwi r11, r6, 8 /* t3 = *(s + 8) */ lwi r12, r6, 12 /* t4 = *(s + 12) */ swi r9, r5, 0 /* *(d + 0) = t1 */ swi r10, r5, 4 /* *(d + 4) = t2 */ swi r11, r5, 8 /* *(d + 8) = t3 */ swi r12, r5, 12 /* *(d + 12) = t4 */ lwi r9, r6, 16 /* t1 = *(s + 16) */ lwi r10, r6, 20 /* t2 = *(s + 20) */ lwi r11, r6, 24 /* t3 = *(s + 24) */ lwi r12, r6, 28 /* t4 = *(s + 28) */ swi r9, r5, 16 /* *(d + 16) = t1 */ swi r10, r5, 20 /* *(d + 20) = t2 */ swi r11, r5, 24 /* *(d + 24) = t3 */ swi r12, r5, 28 /* *(d + 28) = t4 */ addi r6, r6, 32 /* s = s + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_block_aligned /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ add r6, r6, r4 /* s = s + n */ lwi r11, r8, 0 /* h = *(as + 0) */ addi r9, r9, -1 beqi r9, a_block_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9, a_block_u2 /* t1 was 2 => 2 byte offset */ a_block_u3: bslli r11, r11, 24 /* h = h << 24 */ a_bu3_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu3_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_u1: bslli r11, r11, 8 /* h = h << 8 */ a_bu1_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu1_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ bri a_block_done a_block_u2: bslli r11, r11, 16 /* h = h << 16 */ a_bu2_loop: lwi r12, r8, 4 /* v = *(as + 4) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 0 /* *(d + 0) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 8 /* v = *(as + 8) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 4 /* *(d + 4) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 12 /* v = *(as + 12) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 8 /* *(d + 8) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 16 /* v = *(as + 16) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 12 /* *(d + 12) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 20 /* v = *(as + 20) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 16 /* *(d + 16) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 24 /* v = *(as + 24) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 20 /* *(d + 20) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 28 /* v = *(as + 28) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 24 /* *(d + 24) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ lwi r12, r8, 32 /* v = *(as + 32) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ swi r9, r5, 28 /* *(d + 28) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ addi r8, r8, 32 /* as = as + 32 */ addi r4, r4, -32 /* n = n - 32 */ bneid r4, a_bu2_loop /* while (n) loop */ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */ a_block_done: addi r4, r0, 4 /* n = 4 */ cmpu r4, r4, r7 /* n = c - n (unsigned) */ blti r4, a_xfer_end /* if n < 0, less than one word to transfer */ a_word_xfer: andi r4, r7, 0xfffffffc /* n = c & ~3 */ addi r10, r0, 0 /* offset = 0 */ andi r9, r6, 3 /* t1 = s & 3 */ /* if temp != 0, unaligned transfers needed */ bnei r9, a_word_unaligned a_word_aligned: lw r9, r6, r10 /* t1 = *(s+offset) */ sw r9, r5, r10 /* *(d+offset) = t1 */ addi r4, r4,-4 /* n-- */ bneid r4, a_word_aligned /* loop */ addi r10, r10, 4 /* offset++ (IN DELAY SLOT) */ bri a_word_done a_word_unaligned: andi r8, r6, 0xfffffffc /* as = s & ~3 */ lwi r11, r8, 0 /* h = *(as + 0) */ addi r8, r8, 4 /* as = as + 4 */ addi r9, r9, -1 beqi r9, a_word_u1 /* t1 was 1 => 1 byte offset */ addi r9, r9, -1 beqi r9, a_word_u2 /* t1 was 2 => 2 byte offset */ a_word_u3: bslli r11, r11, 24 /* h = h << 24 */ a_wu3_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 8 /* t1 = v >> 8 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 24 /* h = v << 24 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu3_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ bri a_word_done a_word_u1: bslli r11, r11, 8 /* h = h << 8 */ a_wu1_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 24 /* t1 = v >> 24 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 8 /* h = v << 8 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu1_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ bri a_word_done a_word_u2: bslli r11, r11, 16 /* h = h << 16 */ a_wu2_loop: lw r12, r8, r10 /* v = *(as + offset) */ bsrli r9, r12, 16 /* t1 = v >> 16 */ or r9, r11, r9 /* t1 = h | t1 */ sw r9, r5, r10 /* *(d + offset) = t1 */ bslli r11, r12, 16 /* h = v << 16 */ addi r4, r4,-4 /* n = n - 4 */ bneid r4, a_wu2_loop /* while (n) loop */ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */ a_word_done: add r5, r5, r10 /* d = d + offset */ add r6, r6, r10 /* s = s + offset */ rsub r7, r10, r7 /* c = c - offset */ a_xfer_end: a_xfer_end_loop: beqi r7, a_done /* while (c) */ lbui r9, r6, 0 /* t1 = *s */ addi r6, r6, 1 /* s++ */ sbi r9, r5, 0 /* *d = t1 */ addi r7, r7, -1 /* c-- */ brid a_xfer_end_loop /* loop */ addi r5, r5, 1 /* d++ (IN DELAY SLOT) */ a_done: rtsd r15, 8 nop .size memcpy, . - memcpy .end memcpy /*----------------------------------------------------------------------------*/ .globl memmove .type memmove, @function .ent memmove memmove: cmpu r4, r5, r6 /* n = s - d */ bgei r4,fast_memcpy_ascending 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) */ d_done: rtsd r15, 8 nop .size memmove, . - memmove .end memmove
