Date: Thu, 28 Jan 2021 10:51:31 GMT From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 4d2ff2330f51 - main - Remove the old ARMv4 memcpy Message-ID: <202101281051.10SApVei032086@gitrepo.freebsd.org>
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The branch main has been updated by andrew: URL: https://cgit.FreeBSD.org/src/commit/?id=4d2ff2330f515b0a42b83113a201de48c0f38f7a commit 4d2ff2330f515b0a42b83113a201de48c0f38f7a Author: Andrew Turner <andrew@FreeBSD.org> AuthorDate: 2021-01-28 10:39:38 +0000 Commit: Andrew Turner <andrew@FreeBSD.org> CommitDate: 2021-01-28 10:39:38 +0000 Remove the old ARMv4 memcpy This was only used when building for ARMv4 or some ARMv5 or when _STANDALONE is defined. As ARMv4 and ARMv5 support has been removed, and we only define _STANDALONE in the bootloader where we don't use this version of memcpy we can remove it. Differential Revision: https://reviews.freebsd.org/D28313 --- lib/libc/arm/string/memcpy.S | 1376 ++++++++++++++++++++++++++++++++++- lib/libc/arm/string/memcpy_arm.S | 272 ------- lib/libc/arm/string/memcpy_xscale.S | 1375 ---------------------------------- 3 files changed, 1371 insertions(+), 1652 deletions(-) diff --git a/lib/libc/arm/string/memcpy.S b/lib/libc/arm/string/memcpy.S index 3628652681e0..63390edeaa95 100644 --- a/lib/libc/arm/string/memcpy.S +++ b/lib/libc/arm/string/memcpy.S @@ -1,9 +1,1375 @@ -/* $NetBSD: memcpy.S,v 1.4 2003/10/14 07:51:45 scw Exp $ */ +/* $NetBSD: memcpy_xscale.S,v 1.1 2003/10/14 07:51:45 scw Exp $ */ + +/* + * Copyright 2003 Wasabi Systems, Inc. + * All rights reserved. + * + * Written by Steve C. Woodford for Wasabi Systems, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed for the NetBSD Project by + * Wasabi Systems, Inc. + * 4. The name of Wasabi Systems, Inc. may not be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ #include <machine/asm.h> __FBSDID("$FreeBSD$"); -#if !defined(_ARM_ARCH_5E) || defined(_STANDALONE) -#include "memcpy_arm.S" -#else -#include "memcpy_xscale.S" + +.syntax unified + +/* LINTSTUB: Func: void *memcpy(void *dst, const void *src, size_t len) */ +ENTRY(memcpy) + pld [r1] + cmp r2, #0x0c + ble .Lmemcpy_short /* <= 12 bytes */ + mov r3, r0 /* We must not clobber r0 */ + + /* Word-align the destination buffer */ + ands ip, r3, #0x03 /* Already word aligned? */ + beq .Lmemcpy_wordaligned /* Yup */ + cmp ip, #0x02 + ldrb ip, [r1], #0x01 + sub r2, r2, #0x01 + strb ip, [r3], #0x01 + ldrble ip, [r1], #0x01 + suble r2, r2, #0x01 + strble ip, [r3], #0x01 + ldrblt ip, [r1], #0x01 + sublt r2, r2, #0x01 + strblt ip, [r3], #0x01 + + /* Destination buffer is now word aligned */ +.Lmemcpy_wordaligned: + ands ip, r1, #0x03 /* Is src also word-aligned? */ + bne .Lmemcpy_bad_align /* Nope. Things just got bad */ + + /* Quad-align the destination buffer */ + tst r3, #0x07 /* Already quad aligned? */ + ldrne ip, [r1], #0x04 + stmfd sp!, {r4-r9} /* Free up some registers */ + subne r2, r2, #0x04 + strne ip, [r3], #0x04 + + /* Destination buffer quad aligned, source is at least word aligned */ + subs r2, r2, #0x80 + blt .Lmemcpy_w_lessthan128 + + /* Copy 128 bytes at a time */ +.Lmemcpy_w_loop128: + ldr r4, [r1], #0x04 /* LD:00-03 */ + ldr r5, [r1], #0x04 /* LD:04-07 */ + pld [r1, #0x18] /* Prefetch 0x20 */ + ldr r6, [r1], #0x04 /* LD:08-0b */ + ldr r7, [r1], #0x04 /* LD:0c-0f */ + ldr r8, [r1], #0x04 /* LD:10-13 */ + ldr r9, [r1], #0x04 /* LD:14-17 */ + strd r4, [r3], #0x08 /* ST:00-07 */ + ldr r4, [r1], #0x04 /* LD:18-1b */ + ldr r5, [r1], #0x04 /* LD:1c-1f */ + strd r6, [r3], #0x08 /* ST:08-0f */ + ldr r6, [r1], #0x04 /* LD:20-23 */ + ldr r7, [r1], #0x04 /* LD:24-27 */ + pld [r1, #0x18] /* Prefetch 0x40 */ + strd r8, [r3], #0x08 /* ST:10-17 */ + ldr r8, [r1], #0x04 /* LD:28-2b */ + ldr r9, [r1], #0x04 /* LD:2c-2f */ + strd r4, [r3], #0x08 /* ST:18-1f */ + ldr r4, [r1], #0x04 /* LD:30-33 */ + ldr r5, [r1], #0x04 /* LD:34-37 */ + strd r6, [r3], #0x08 /* ST:20-27 */ + ldr r6, [r1], #0x04 /* LD:38-3b */ + ldr r7, [r1], #0x04 /* LD:3c-3f */ + strd r8, [r3], #0x08 /* ST:28-2f */ + ldr r8, [r1], #0x04 /* LD:40-43 */ + ldr r9, [r1], #0x04 /* LD:44-47 */ + pld [r1, #0x18] /* Prefetch 0x60 */ + strd r4, [r3], #0x08 /* ST:30-37 */ + ldr r4, [r1], #0x04 /* LD:48-4b */ + ldr r5, [r1], #0x04 /* LD:4c-4f */ + strd r6, [r3], #0x08 /* ST:38-3f */ + ldr r6, [r1], #0x04 /* LD:50-53 */ + ldr r7, [r1], #0x04 /* LD:54-57 */ + strd r8, [r3], #0x08 /* ST:40-47 */ + ldr r8, [r1], #0x04 /* LD:58-5b */ + ldr r9, [r1], #0x04 /* LD:5c-5f */ + strd r4, [r3], #0x08 /* ST:48-4f */ + ldr r4, [r1], #0x04 /* LD:60-63 */ + ldr r5, [r1], #0x04 /* LD:64-67 */ + pld [r1, #0x18] /* Prefetch 0x80 */ + strd r6, [r3], #0x08 /* ST:50-57 */ + ldr r6, [r1], #0x04 /* LD:68-6b */ + ldr r7, [r1], #0x04 /* LD:6c-6f */ + strd r8, [r3], #0x08 /* ST:58-5f */ + ldr r8, [r1], #0x04 /* LD:70-73 */ + ldr r9, [r1], #0x04 /* LD:74-77 */ + strd r4, [r3], #0x08 /* ST:60-67 */ + ldr r4, [r1], #0x04 /* LD:78-7b */ + ldr r5, [r1], #0x04 /* LD:7c-7f */ + strd r6, [r3], #0x08 /* ST:68-6f */ + strd r8, [r3], #0x08 /* ST:70-77 */ + subs r2, r2, #0x80 + strd r4, [r3], #0x08 /* ST:78-7f */ + bge .Lmemcpy_w_loop128 + +.Lmemcpy_w_lessthan128: + adds r2, r2, #0x80 /* Adjust for extra sub */ + ldmfdeq sp!, {r4-r9} + bxeq lr /* Return now if done */ + subs r2, r2, #0x20 + blt .Lmemcpy_w_lessthan32 + + /* Copy 32 bytes at a time */ +.Lmemcpy_w_loop32: + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + pld [r1, #0x18] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr r8, [r1], #0x04 + ldr r9, [r1], #0x04 + strd r4, [r3], #0x08 + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + strd r6, [r3], #0x08 + strd r8, [r3], #0x08 + subs r2, r2, #0x20 + strd r4, [r3], #0x08 + bge .Lmemcpy_w_loop32 + +.Lmemcpy_w_lessthan32: + adds r2, r2, #0x20 /* Adjust for extra sub */ + ldmfdeq sp!, {r4-r9} + bxeq lr /* Return now if done */ + + and r4, r2, #0x18 + rsbs r4, r4, #0x18 + addne pc, pc, r4, lsl #1 + nop + + /* At least 24 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + sub r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* At least 16 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + sub r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* At least 8 bytes remaining */ + ldr r4, [r1], #0x04 + ldr r5, [r1], #0x04 + subs r2, r2, #0x08 + strd r4, [r3], #0x08 + + /* Less than 8 bytes remaining */ + ldmfd sp!, {r4-r9} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + ldrge ip, [r1], #0x04 + strge ip, [r3], #0x04 + bxeq lr /* Return now if done */ + addlt r2, r2, #0x04 + ldrb ip, [r1], #0x01 + cmp r2, #0x02 + ldrbge r2, [r1], #0x01 + strb ip, [r3], #0x01 + ldrbgt ip, [r1] + strbge r2, [r3], #0x01 + strbgt ip, [r3] + bx lr + + +/* + * At this point, it has not been possible to word align both buffers. + * The destination buffer is word aligned, but the source buffer is not. + */ +.Lmemcpy_bad_align: + stmfd sp!, {r4-r7} + bic r1, r1, #0x03 + cmp ip, #2 + ldr ip, [r1], #0x04 + bgt .Lmemcpy_bad3 + beq .Lmemcpy_bad2 + b .Lmemcpy_bad1 + +.Lmemcpy_bad1_loop16: + mov r4, ip, lsr #8 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #24 + mov r5, r5, lsr #8 + orr r5, r5, r6, lsl #24 + mov r6, r6, lsr #8 + orr r6, r6, r7, lsl #24 + mov r7, r7, lsr #8 + orr r7, r7, ip, lsl #24 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad1: + subs r2, r2, #0x10 + bge .Lmemcpy_bad1_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x03 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad1_loop4: + mov r4, ip, lsr #8 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #24 + str r4, [r3], #0x04 + bge .Lmemcpy_bad1_loop4 + sub r1, r1, #0x03 + b .Lmemcpy_bad_done + +.Lmemcpy_bad2_loop16: + mov r4, ip, lsr #16 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #16 + mov r5, r5, lsr #16 + orr r5, r5, r6, lsl #16 + mov r6, r6, lsr #16 + orr r6, r6, r7, lsl #16 + mov r7, r7, lsr #16 + orr r7, r7, ip, lsl #16 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad2: + subs r2, r2, #0x10 + bge .Lmemcpy_bad2_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x02 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad2_loop4: + mov r4, ip, lsr #16 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #16 + str r4, [r3], #0x04 + bge .Lmemcpy_bad2_loop4 + sub r1, r1, #0x02 + b .Lmemcpy_bad_done + +.Lmemcpy_bad3_loop16: + mov r4, ip, lsr #24 + ldr r5, [r1], #0x04 + pld [r1, #0x018] + ldr r6, [r1], #0x04 + ldr r7, [r1], #0x04 + ldr ip, [r1], #0x04 + orr r4, r4, r5, lsl #8 + mov r5, r5, lsr #24 + orr r5, r5, r6, lsl #8 + mov r6, r6, lsr #24 + orr r6, r6, r7, lsl #8 + mov r7, r7, lsr #24 + orr r7, r7, ip, lsl #8 + str r4, [r3], #0x04 + str r5, [r3], #0x04 + str r6, [r3], #0x04 + str r7, [r3], #0x04 +.Lmemcpy_bad3: + subs r2, r2, #0x10 + bge .Lmemcpy_bad3_loop16 + + adds r2, r2, #0x10 + ldmfdeq sp!, {r4-r7} + bxeq lr /* Return now if done */ + subs r2, r2, #0x04 + sublt r1, r1, #0x01 + blt .Lmemcpy_bad_done + +.Lmemcpy_bad3_loop4: + mov r4, ip, lsr #24 + ldr ip, [r1], #0x04 + subs r2, r2, #0x04 + orr r4, r4, ip, lsl #8 + str r4, [r3], #0x04 + bge .Lmemcpy_bad3_loop4 + sub r1, r1, #0x01 + +.Lmemcpy_bad_done: + ldmfd sp!, {r4-r7} + adds r2, r2, #0x04 + bxeq lr + ldrb ip, [r1], #0x01 + cmp r2, #0x02 + ldrbge r2, [r1], #0x01 + strb ip, [r3], #0x01 + ldrbgt ip, [r1] + strbge r2, [r3], #0x01 + strbgt ip, [r3] + bx lr + + +/* + * Handle short copies (less than 16 bytes), possibly misaligned. + * Some of these are *very* common, thanks to the network stack, + * and so are handled specially. + */ +.Lmemcpy_short: +#ifndef _STANDALONE + add pc, pc, r2, lsl #2 + nop + bx lr /* 0x00 */ + b .Lmemcpy_bytewise /* 0x01 */ + b .Lmemcpy_bytewise /* 0x02 */ + b .Lmemcpy_bytewise /* 0x03 */ + b .Lmemcpy_4 /* 0x04 */ + b .Lmemcpy_bytewise /* 0x05 */ + b .Lmemcpy_6 /* 0x06 */ + b .Lmemcpy_bytewise /* 0x07 */ + b .Lmemcpy_8 /* 0x08 */ + b .Lmemcpy_bytewise /* 0x09 */ + b .Lmemcpy_bytewise /* 0x0a */ + b .Lmemcpy_bytewise /* 0x0b */ + b .Lmemcpy_c /* 0x0c */ #endif +.Lmemcpy_bytewise: + mov r3, r0 /* We must not clobber r0 */ + ldrb ip, [r1], #0x01 +1: subs r2, r2, #0x01 + strb ip, [r3], #0x01 + ldrbne ip, [r1], #0x01 + bne 1b + bx lr + +#ifndef _STANDALONE +/****************************************************************************** + * Special case for 4 byte copies + */ +#define LMEMCPY_4_LOG2 6 /* 64 bytes */ +#define LMEMCPY_4_PAD .align LMEMCPY_4_LOG2 + LMEMCPY_4_PAD +.Lmemcpy_4: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_4_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + str r2, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #3] /* BE:r2 = 3xxx LE:r2 = xxx3 */ + mov r3, r3, lsr #8 /* r3 = .210 */ + orr r3, r3, r2, lsl #24 /* r3 = 3210 */ + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldrh r3, [r1, #0x02] + ldrh r2, [r1] + orr r3, r2, r3, lsl #16 + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-3] /* BE:r3 = xxx0 LE:r3 = 0xxx */ + ldr r2, [r1, #1] /* BE:r2 = 123x LE:r2 = x321 */ + mov r3, r3, lsr #24 /* r3 = ...0 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + str r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + strb r2, [r0] + mov r3, r2, lsr #8 + mov r1, r2, lsr #24 + strb r1, [r0, #0x03] + strh r3, [r0, #0x01] + bx lr + LMEMCPY_4_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldrh r3, [r1, #0x02] /* LE:r3 = ..23 LE:r3 = ..32 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = .321 */ + mov r3, r3, lsr #8 /* r3 = ...3 */ + strh r2, [r0, #0x01] + strb r3, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + strh r2, [r0] + mov r3, r2, lsr #16 + strh r3, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #3] /* BE:r3 = 3xxx LE:r3 = xxx3 */ + mov r1, r2, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ + strh r1, [r0] + mov r2, r2, lsr #24 /* r2 = ...2 */ + orr r2, r2, r3, lsl #8 /* r2 = xx32 */ + strh r2, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldrh r3, [r1, #0x02] + strh r2, [r0] + strh r3, [r0, #0x02] + bx lr + LMEMCPY_4_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #1] /* BE:r3 = 123x LE:r3 = x321 */ + ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ + mov r1, r3, lsr #8 /* BE:r1 = .123 LE:r1 = .x32 */ + strh r1, [r0, #0x02] + mov r3, r3, lsl #8 /* r3 = 321. */ + orr r3, r3, r2, lsr #24 /* r3 = 3210 */ + strh r3, [r0] + bx lr + LMEMCPY_4_PAD + +/* + * 1100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + strb r2, [r0] + mov r3, r2, lsr #8 + mov r1, r2, lsr #24 + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldrh r3, [r1, #0x02] /* BE:r3 = ..23 LE:r3 = ..32 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r3, lsl #8 /* r2 = .321 */ + strh r2, [r0, #0x01] + mov r3, r3, lsr #8 /* r3 = ...3 */ + strb r3, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + +/* + * 1111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrb r1, [r1, #0x03] + strb r2, [r0] + strh r3, [r0, #0x01] + strb r1, [r0, #0x03] + bx lr + LMEMCPY_4_PAD + + +/****************************************************************************** + * Special case for 6 byte copies + */ +#define LMEMCPY_6_LOG2 6 /* 64 bytes */ +#define LMEMCPY_6_PAD .align LMEMCPY_6_LOG2 + LMEMCPY_6_PAD +.Lmemcpy_6: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_6_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + ldrh r3, [r1, #0x04] + str r2, [r0] + strh r3, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-1] /* BE:r2 = x012 LE:r2 = 210x */ + ldr r3, [r1, #0x03] /* BE:r3 = 345x LE:r3 = x543 */ + mov r2, r2, lsr #8 /* r2 = .210 */ + orr r2, r2, r3, lsl #24 /* r2 = 3210 */ + mov r3, r3, lsr #8 /* BE:r3 = .345 LE:r3 = .x54 */ + str r2, [r0] + strh r3, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + mov r1, r3, lsr #16 /* r1 = ..54 */ + orr r2, r2, r3, lsl #16 /* r2 = 3210 */ + str r2, [r0] + strh r1, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r2, [r1, #-3] /* BE:r2 = xxx0 LE:r2 = 0xxx */ + ldr r3, [r1, #1] /* BE:r3 = 1234 LE:r3 = 4321 */ + ldr r1, [r1, #5] /* BE:r1 = 5xxx LE:r3 = xxx5 */ + mov r2, r2, lsr #24 /* r2 = ...0 */ + orr r2, r2, r3, lsl #8 /* r2 = 3210 */ + mov r1, r1, lsl #8 /* r1 = xx5. */ + orr r1, r1, r3, lsr #24 /* r1 = xx54 */ + str r2, [r0] + strh r1, [r0, #0x04] + bx lr + LMEMCPY_6_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ + ldrh r2, [r1, #0x04] /* BE:r2 = ..45 LE:r2 = ..54 */ + mov r1, r3, lsr #8 /* BE:r1 = .012 LE:r1 = .321 */ + strh r1, [r0, #0x01] + strb r3, [r0] + mov r3, r3, lsr #24 /* r3 = ...3 */ + orr r3, r3, r2, lsl #8 /* r3 = .543 */ + mov r2, r2, lsr #8 /* r2 = ...5 */ + strh r3, [r0, #0x03] + strb r2, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ + strb r2, [r0] + mov r3, r1, lsr #24 + strb r3, [r0, #0x05] + mov r3, r1, lsr #8 /* r3 = .543 */ + strh r3, [r0, #0x03] + mov r3, r2, lsr #8 /* r3 = ...1 */ + orr r3, r3, r1, lsl #8 /* r3 = 4321 */ + strh r3, [r0, #0x01] + bx lr + LMEMCPY_6_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldrh r2, [r1, #0x04] /* r2 = ..54 */ + ldr r3, [r1] /* r3 = 3210 */ + mov r2, r2, lsl #16 /* r2 = 54.. */ + orr r2, r2, r3, lsr #16 /* r2 = 5432 */ + strh r3, [r0] + str r2, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1001: dst is 16-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #3] /* BE:r2 = 345x LE:r2 = x543 */ + mov r1, r3, lsr #8 /* BE:r1 = .x01 LE:r1 = .210 */ + mov r2, r2, lsl #8 /* r2 = 543. */ + orr r2, r2, r3, lsr #24 /* r2 = 5432 */ + strh r1, [r0] + str r2, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1010: dst is 16-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] + ldr r3, [r1, #0x02] + strh r2, [r0] + str r3, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1011: dst is 16-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ + ldrb r1, [r1, #0x05] /* r1 = ...5 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + mov r1, r1, lsl #24 /* r1 = 5... */ + orr r1, r1, r2, lsr #8 /* r1 = 5432 */ + strh r3, [r0] + str r1, [r0, #0x02] + bx lr + LMEMCPY_6_PAD + +/* + * 1100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldrh r1, [r1, #0x04] /* BE:r1 = ..45 LE:r1 = ..54 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = .321 */ + orr r2, r2, r1, lsl #24 /* r2 = 4321 */ + mov r1, r1, lsr #8 /* r1 = ...5 */ + str r2, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldrh ip, [r1, #0x03] + ldrb r1, [r1, #0x05] + strb r2, [r0] + strh r3, [r0, #0x01] + strh ip, [r0, #0x03] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r1, [r1, #0x02] /* BE:r1 = 2345 LE:r1 = 5432 */ + strb r2, [r0] + mov r2, r2, lsr #8 /* r2 = ...1 */ + orr r2, r2, r1, lsl #8 /* r2 = 4321 */ + mov r1, r1, lsr #24 /* r1 = ...5 */ + str r2, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + +/* + * 1111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldr r3, [r1, #0x01] + ldrb r1, [r1, #0x05] + strb r2, [r0] + str r3, [r0, #0x01] + strb r1, [r0, #0x05] + bx lr + LMEMCPY_6_PAD + + +/****************************************************************************** + * Special case for 8 byte copies + */ +#define LMEMCPY_8_LOG2 6 /* 64 bytes */ +#define LMEMCPY_8_PAD .align LMEMCPY_8_LOG2 + LMEMCPY_8_PAD +.Lmemcpy_8: + and r2, r1, #0x03 + orr r2, r2, r0, lsl #2 + ands r2, r2, #0x0f + sub r3, pc, #0x14 + addne pc, r3, r2, lsl #LMEMCPY_8_LOG2 + +/* + * 0000: dst is 32-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] + ldr r3, [r1, #0x04] + str r2, [r0] + str r3, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0001: dst is 32-bit aligned, src is 8-bit aligned + */ + ldr r3, [r1, #-1] /* BE:r3 = x012 LE:r3 = 210x */ + ldr r2, [r1, #0x03] /* BE:r2 = 3456 LE:r2 = 6543 */ + ldrb r1, [r1, #0x07] /* r1 = ...7 */ + mov r3, r3, lsr #8 /* r3 = .210 */ + orr r3, r3, r2, lsl #24 /* r3 = 3210 */ + mov r1, r1, lsl #24 /* r1 = 7... */ + orr r2, r1, r2, lsr #8 /* r2 = 7654 */ + str r3, [r0] + str r2, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0010: dst is 32-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ + orr r2, r2, r3, lsl #16 /* r2 = 3210 */ + mov r3, r3, lsr #16 /* r3 = ..54 */ + orr r3, r3, r1, lsl #16 /* r3 = 7654 */ + str r2, [r0] + str r3, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0011: dst is 32-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr r2, [r1, #0x01] /* BE:r2 = 1234 LE:r2 = 4321 */ + ldr r1, [r1, #0x05] /* BE:r1 = 567x LE:r1 = x765 */ + orr r3, r3, r2, lsl #8 /* r3 = 3210 */ + mov r2, r2, lsr #24 /* r2 = ...4 */ + orr r2, r2, r1, lsl #8 /* r2 = 7654 */ + str r3, [r0] + str r2, [r0, #0x04] + bx lr + LMEMCPY_8_PAD + +/* + * 0100: dst is 8-bit aligned, src is 32-bit aligned + */ + ldr r3, [r1] /* BE:r3 = 0123 LE:r3 = 3210 */ + ldr r2, [r1, #0x04] /* BE:r2 = 4567 LE:r2 = 7654 */ + strb r3, [r0] + mov r1, r2, lsr #24 /* r1 = ...7 */ + strb r1, [r0, #0x07] + mov r1, r3, lsr #8 /* r1 = .321 */ + mov r3, r3, lsr #24 /* r3 = ...3 */ + orr r3, r3, r2, lsl #8 /* r3 = 6543 */ + strh r1, [r0, #0x01] + str r3, [r0, #0x03] + bx lr + LMEMCPY_8_PAD + +/* + * 0101: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r2, [r1] + ldrh r3, [r1, #0x01] + ldr ip, [r1, #0x03] + ldrb r1, [r1, #0x07] + strb r2, [r0] + strh r3, [r0, #0x01] + str ip, [r0, #0x03] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/* + * 0110: dst is 8-bit aligned, src is 16-bit aligned + */ + ldrh r2, [r1] /* BE:r2 = ..01 LE:r2 = ..10 */ + ldr r3, [r1, #0x02] /* BE:r3 = 2345 LE:r3 = 5432 */ + ldrh r1, [r1, #0x06] /* BE:r1 = ..67 LE:r1 = ..76 */ + strb r2, [r0] /* 0 */ + mov ip, r1, lsr #8 /* ip = ...7 */ + strb ip, [r0, #0x07] /* 7 */ + mov ip, r2, lsr #8 /* ip = ...1 */ + orr ip, ip, r3, lsl #8 /* ip = 4321 */ + mov r3, r3, lsr #8 /* r3 = .543 */ + orr r3, r3, r1, lsl #24 /* r3 = 6543 */ + strh ip, [r0, #0x01] + str r3, [r0, #0x03] + bx lr + LMEMCPY_8_PAD + +/* + * 0111: dst is 8-bit aligned, src is 8-bit aligned + */ + ldrb r3, [r1] /* r3 = ...0 */ + ldr ip, [r1, #0x01] /* BE:ip = 1234 LE:ip = 4321 */ + ldrh r2, [r1, #0x05] /* BE:r2 = ..56 LE:r2 = ..65 */ + ldrb r1, [r1, #0x07] /* r1 = ...7 */ + strb r3, [r0] + mov r3, ip, lsr #16 /* BE:r3 = ..12 LE:r3 = ..43 */ + strh ip, [r0, #0x01] + orr r2, r3, r2, lsl #16 /* r2 = 6543 */ + str r2, [r0, #0x03] + strb r1, [r0, #0x07] + bx lr + LMEMCPY_8_PAD + +/* + * 1000: dst is 16-bit aligned, src is 32-bit aligned + */ + ldr r2, [r1] /* BE:r2 = 0123 LE:r2 = 3210 */ + ldr r3, [r1, #0x04] /* BE:r3 = 4567 LE:r3 = 7654 */ + mov r1, r2, lsr #16 /* BE:r1 = ..01 LE:r1 = ..32 */ + strh r2, [r0] + orr r2, r1, r3, lsl #16 /* r2 = 5432 */ + mov r3, r3, lsr #16 /* r3 = ..76 */ + str r2, [r0, #0x02] + strh r3, [r0, #0x06] + bx lr + LMEMCPY_8_PAD *** 2081 LINES SKIPPED ***
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