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From: Michael Frysinger <vapier@sourceware.org> To: newlib-cvs@sourceware.org Subject: [newlib-cygwin] newlib: drop unused xscale subdir Date: Wed, 9 Feb 2022 00:05:37 +0000 (GMT) [thread overview] Message-ID: <20220209000537.B4D293858D3C@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=8fff0aac0ac4c21569cff1204c5085ff501cebe6 commit 8fff0aac0ac4c21569cff1204c5085ff501cebe6 Author: Mike Frysinger <vapier@gentoo.org> Date: Mon Feb 7 05:19:36 2022 -0500 newlib: drop unused xscale subdir This target was deleted in 2011 in 25fa7e5ad63d97d00deef1c9eddb346d11, but this directory was missed. Punt it too. Diff: --- newlib/libc/machine/xscale/Makefile.am | 12 - newlib/libc/machine/xscale/Makefile.in | 598 --------------------------- newlib/libc/machine/xscale/machine/profile.h | 88 ---- newlib/libc/machine/xscale/memchr.c | 102 ----- newlib/libc/machine/xscale/memcmp.c | 112 ----- newlib/libc/machine/xscale/memcpy.c | 103 ----- newlib/libc/machine/xscale/memmove.c | 122 ------ newlib/libc/machine/xscale/memset.c | 91 ---- newlib/libc/machine/xscale/setjmp.S | 137 ------ newlib/libc/machine/xscale/strchr.c | 73 ---- newlib/libc/machine/xscale/strcmp.c | 107 ----- newlib/libc/machine/xscale/strcpy.c | 62 --- newlib/libc/machine/xscale/strlen.c | 100 ----- newlib/libc/machine/xscale/xscale.h | 31 -- 14 files changed, 1738 deletions(-) diff --git a/newlib/libc/machine/xscale/Makefile.am b/newlib/libc/machine/xscale/Makefile.am deleted file mode 100644 index 913d162d4..000000000 --- a/newlib/libc/machine/xscale/Makefile.am +++ /dev/null @@ -1,12 +0,0 @@ -## Process this file with automake to generate Makefile.in - -AM_CPPFLAGS = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS) - -AM_CCASFLAGS = $(AM_CPPFLAGS) - -noinst_LIBRARIES = lib.a - -lib_a_SOURCES = \ - memchr.c memcmp.c memcpy.c memmove.c memset.c \ - strchr.c strcmp.c strcpy.c strlen.c setjmp.S -lib_a_CFLAGS = $(AM_CFLAGS) diff --git a/newlib/libc/machine/xscale/Makefile.in b/newlib/libc/machine/xscale/Makefile.in deleted file mode 100644 index ef68dae0f..000000000 --- a/newlib/libc/machine/xscale/Makefile.in +++ /dev/null @@ -1,598 +0,0 @@ -# Makefile.in generated by automake 1.15.1 from Makefile.am. -# @configure_input@ - -# Copyright (C) 1994-2017 Free Software Foundation, Inc. - -# This Makefile.in is free software; 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All rights reserved. - - Permission to use, copy, modify, and distribute this software - is freely granted, provided that this notice is preserved. */ - -#ifndef __XSCALE_PROFILE_H__ -#define __XSCALE_PROFILE_H__ - -/* FIXME: - We need to create a string version of the CPP predefined - __USER_LABEL_PREFIX__ macro. Ideally we would like to - so do something like: - - #if __USER_LABEL_PREFIX__ == _ - - but this fails for arm-elf targets because although - __USER_LABEL__PREFIX__ is defined, it is not defined to - a specific value (even 0) and so the above test fails - with: - - operator '==' has no left operand - - Instead we have to test the CPP predefined __ELF__ and - rely upon the *assumption* that ELF targets will not use - an underscore prefix and that COFF targets will. */ - -#ifdef __ELF__ -#define FOO "" -#else -#define FOO "_" -#endif - -#define _MCOUNT_DECL(frompc, selfpc) \ -void __attribute__ ((__no_instrument_function__)) \ -mcount_internal (frompc, selfpc) - -/* mcount_internal expects two arguments - r0 frompc (return address for function that call function that calls mcount) - r1 selfpc (return address for function that called mcount) - - The frompc is extracted from the stack frames. If the code does not - generate stack frames, then mcount cannot extract this - information. Thus, the -fomit-frame-pointer optimization cannot be - used if a call graph information is required. - - Due to optimizations mcount doesn't set up a new fp. mcount has the fp - of the calling function. - - r0 frompc is from the current frame - r1 selfpc can be obtained directly from lr. */ - -#ifdef __thumb__ -#define MCOUNT \ -void __attribute__ ((__naked__)) \ - __attribute__ ((__no_instrument_function__)) \ -mcount (void) \ -{ \ - __asm__("push {r0, r1, r2, r3, lr};" \ - "add r0, r7, #0;" \ - "beq 1f;" \ - "sub r0, r0, #4;" \ - "ldr r0, [r0];" \ - "1: mov r1, lr;" \ - "bl " FOO "mcount_internal ;" \ - "pop {r0, r1, r2, r3, pc};" \ - ); \ -} -#else -#define MCOUNT \ -void __attribute__ ((__naked__)) \ - __attribute__ ((__no_instrument_function__)) \ -mcount (void) \ -{ \ - __asm__("stmdb sp!, {r0, r1, r2, r3, lr};" \ - "movs r0, fp;" \ - "ldrne r0, [r0, #-4];" \ - "mov r1, lr;" \ - "bl " FOO "mcount_internal ;" \ - "ldmia sp!, {r0, r1, r2, r3, pc};" \ - ); \ -} -#endif - -#define FUNCTION_ALIGNMENT 2 - -#endif /* !__XSCALE_PROFILE_H__ */ diff --git a/newlib/libc/machine/xscale/memchr.c b/newlib/libc/machine/xscale/memchr.c deleted file mode 100644 index 9bf18268b..000000000 --- a/newlib/libc/machine/xscale/memchr.c +++ /dev/null @@ -1,102 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memchr.c" - -#else - -#include <string.h> -#include "xscale.h" - -void * -memchr (const void *start, int c, size_t len) -{ - const char *str = start; - - if (len == 0) - return 0; - - asm (PRELOADSTR ("%0") : : "r" (start)); - - c &= 0xff; - -#ifndef __OPTIMIZE_SIZE__ - /* Skip unaligned part. */ - if ((long)str & 3) - { - str--; - do - { - if (*++str == c) - return (void *)str; - } - while (((long)str & 3) != 0 && --len > 0); - } - - if (len > 3) - { - unsigned int c2 = c + (c << 8); - c2 += c2 << 16; - - /* Load two constants: - R7 = 0xfefefeff [ == ~(0x80808080 << 1) ] - R6 = 0x80808080 */ - - asm ( - "mov r6, #0x80\n\ - add r6, r6, #0x8000\n\ - add r6, r6, r6, lsl #16\n\ - mvn r7, r6, lsl #1\n\ -\n\ -0:\n\ - cmp %1, #0x7\n\ - bls 1f\n\ -\n\ - ldmia %0!, { r3, r9 }\n\ -" PRELOADSTR ("%0") "\n\ - sub %1, %1, #8\n\ - eor r3, r3, %2\n\ - eor r9, r9, %2\n\ - add r2, r3, r7\n\ - add r8, r9, r7\n\ - bic r2, r2, r3\n\ - bic r8, r8, r9\n\ - and r1, r2, r6\n\ - and r9, r8, r6\n\ - orrs r1, r1, r9\n\ - beq 0b\n\ -\n\ - add %1, %1, #8\n\ - sub %0, %0, #8\n\ -1:\n\ - cmp %1, #0x3\n\ - bls 2f\n\ -\n\ - ldr r3, [%0], #4\n\ -" PRELOADSTR ("%0") "\n\ - sub %1, %1, #4\n\ - eor r3, r3, %2\n\ - add r2, r3, r7\n\ - bic r2, r2, r3\n\ - ands r1, r2, r6\n\ - beq 1b\n\ -\n\ - sub %0, %0, #4\n\ - add %1, %1, #4\n\ -2:\n\ -" - : "=&r" (str), "=&r" (len) - : "r" (c2), "0" (str), "1" (len) - : "r1", "r2", "r3", "r6", "r7", "r8", "r9", "cc"); - } -#endif - - while (len-- > 0) - { - if (*str == c) - return (void *)str; - str++; - } - - return 0; -} -#endif diff --git a/newlib/libc/machine/xscale/memcmp.c b/newlib/libc/machine/xscale/memcmp.c deleted file mode 100644 index 1eba4b8dd..000000000 --- a/newlib/libc/machine/xscale/memcmp.c +++ /dev/null @@ -1,112 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memcmp.c" - -#else - -#include <string.h> -#include "xscale.h" - -int -memcmp (const void * s1, const void * s2, size_t len) -{ - int result; - asm ( -#ifndef __OPTIMIZE_SIZE__ -"\n\ - cmp %2, #0x3 @ Is the length a multiple of four ?\n\ - bls 6f @ no = goto SLOW CHECK\n\ - and r2, %0, #0x3 @ get alignment of first pointer\n\ - and r3, %1, #0x3 @ get alignment of second pointer\n\ - cmp r2, r3 @ Do the two pointers share the same alignment ?\n\ - bne 6f @ no = goto SLOW CHECK\n\ - mov lr, %0 @ copy first pointer into LR\n\ - mov r4, %1 @ copy second pointer into R4\n\ - cmp r2, #0x0 @ Are we comparing word aligned pointers ?\n\ - beq 3f @ yes = goto START WORD CHECK LOOP\n\ - b 1f @ jump to LOOP TEST\n\ -0: @ LOOP START\n\ - ldrb r2, [lr], #1 @ load byte from LR, post inc.\n\ -" PRELOADSTR("lr") " @ preload\n\ - ldrb r3, [r4], #1 @ load byte from R4, post inc.\n\ -" PRELOADSTR("r4") " @ preload\n\ - cmp r2, r3 @ are the two bytes the same ?\n\ - bne 5f @ no = goto EXIT\n\ - tst lr, #0x3 @ has the LR become word aligned ?\n\ - bne 1f @ no = skip the next test\n\ - cmp %2, #4 @ is the count >= 4 ?\n\ - bhs 3f @ yes = goto START WORD CHECK LOOP\n\ -1: @ LOOP TEST\n\ - sub %2, %2, #1 @ decrement count by one\n\ - cmn %2, #0x1 @ has the count reached -1 ?\n\ - bne 0b @ no = loop back to LOOP START\n\ - b 4f @ goto PASS END\n\ -\n\ -0: @ ??\n\ - cmp %2, #0x7 @ Is the count a multiple of 8 ?\n\ - bls 3f @ no = goto ???\n\ - ldmia lr,{r2, r3} @ get two words from first pointer, post inc\n\ - ldmia r4,{r5, r6} @ get two words from second pointer, post inc\n\ - sub %2, %2, #0x4 @ decrement count by 4\n\ - cmp r2, r5 @ has the count reached ????\n\ - bne 1f @ no = goto\n\ - sub %2, %2, #0x4 @ decrement the count by 4\n\ - add lr, lr, #0x4 @ add 4 to first pointer\n\ - add r4, r4, #0x4 @ add 4 to second pointer\n\ - cmp r3, r6 @ ???\n\ - beq 0b @ goto ???\n\ -1: @ ??\n\ - add %2, %2, #0x4 @ Add four to count\n\ - sub %0, lr, #0x4 @ decrement first pointer by 4\n\ - sub %1, r4, #0x4 @ decrement second pointer by 4\n\ - b 6f @ goto SLOW CHECK\n\ -\n\ -3: @ START WORD CHECK LOOP\n\ - cmp %2, #0x3 @ is the count <= 3 ?\n\ - bls 1f @ yes = goto CHECK BYTES BY HAND\n\ - ldr r2, [lr], #4 @ get word from LR, post inc\n\ - ldr r3, [r4], #4 @ get word from R4, post inc\n\ - sub %2, %2, #4 @ decrement count by 4\n\ - cmp r2, r3 @ are the two words the same ?\n\ - bne 1f @ no = goto CHECK WORD CONTENTS\n\ -0: @ WORD CHECK LOOP\n\ - cmp %2, #0x3 @ is the count <= 3 ?\n\ - bls 1f @ yes = goto CHECK BYTES BY HAND\n\ - ldr r2, [lr], #4 @ load word from LR, post inc\n\ -" PRELOADSTR("lr") " @ preload\n\ - ldr r3, [r4], #4 @ load word from R4, post inc\n\ -" PRELOADSTR("r4") " @ preload\n\ - sub %2, %2, #4 @ decrement count by 4\n\ - cmp r2, r3 @ are the two words the same ?\n\ - beq 0b @ yes = goto WORD CHECK LOOP\n\ -1: @ CHECK BYTES BY HAND\n\ - sub %0, lr, #0x4 @ move LR back a word and put into first pointer\n\ - sub %1, r4, #0x4 @ move R4 back a word and put into second pointer\n\ - add %2, %2, #4 @ increment the count by 4\n\ - @ fall through into SLOW CHECK" -#endif /* !__OPTIMIZE_SIZE__ */ -"\n\ -6: @ SLOW CHECK\n\ - sub %2, %2, #1 @ Decrement the count by one\n\ - cmn %2, #0x1 @ Has the count reached -1 ?\n\ - beq 4f @ Yes - we are finished, goto PASS END\n\ -0: @ LOOP1\n\ - ldrb r2, [%0], #1 @ get byte from first pointer\n\ -" PRELOADSTR("%0") " @ preload first pointer\n\ - ldrb r3, [%1], #1 @ get byte from second pointer\n\ -" PRELOADSTR("%1") " @ preload second pointer\n\ - cmp r2, r3 @ compare the two loaded bytes\n\ - bne 5f @ if they are not equal goto EXIT\n\ - sub %2, %2, #1 @ decremented count by 1\n\ - cmn %2, #0x1 @ has the count reached -1 ?\n\ - bne 0b @ no = then go back to LOOP1\n\ -4: @ PASS END\n\ - mov r3, r2 @ Default return value is 0\n\ -5: @ EXIT\n\ - rsb %0, r3, r2 @ return difference between last two bytes loaded" - : "=r" (result), "=&r" (s2), "=&r" (len) - : "0" (s1), "1" (s2), "2" (len) - : "r2", "r3", "r4", "r5", "r6", "cc", "lr"); - return result; -} -#endif diff --git a/newlib/libc/machine/xscale/memcpy.c b/newlib/libc/machine/xscale/memcpy.c deleted file mode 100644 index 20758e159..000000000 --- a/newlib/libc/machine/xscale/memcpy.c +++ /dev/null @@ -1,103 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memcpy.c" - -#else - -#include <string.h> -#include "xscale.h" -#include "../../string/local.h" - -void * -__inhibit_loop_to_libcall -memcpy (void *__restrict dst0, const void *__restrict src0, size_t len) -{ - int dummy; - asm volatile ( -#ifndef __OPTIMIZE_SIZE__ - "cmp %2, #0x3\n\ - bls 3f\n\ - and lr, %1, #0x3\n\ - and r3, %0, #0x3\n\ - cmp lr, r3\n\ - bne 3f\n\ - cmp lr, #0x0\n\ - beq 2f\n\ - b 1f\n\ -0:\n\ - ldrb r3, [%1], #1\n\ -" - PRELOADSTR ("%1") -"\n\ - tst %1, #0x3\n\ - strb r3, [%0], #1\n\ - beq 3f\n\ -1:\n\ - sub %2, %2, #1\n\ - cmn %2, #1\n\ - bne 0b\n\ -2:\n\ - cmp %2, #0xf\n\ - bls 1f\n\ -0:\n\ - ldmia %1!, { r3, r4, r5, lr }\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - sub %2, %2, #16\n\ - cmp %2, #0xf\n\ - stmia %0!, { r3, r4, r5, lr }\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x7\n\ - bls 1f\n\ -0:\n\ - ldmia %1!, { r3, r4 }\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - sub %2, %2, #8\n\ - cmp %2, #0x7\n\ - stmia %0!, { r3, r4 }\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 3f\n\ -0:\n\ - sub %2, %2, #4\n\ - ldr r3, [%1], #4\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - cmp %2, #0x3\n\ - str r3, [%0], #4\n\ - bhi 0b\n\ -" -#endif /* !__OPTIMIZE_SIZE__ */ -"\n\ -3:\n\ -" - PRELOADSTR ("%1") -"\n\ - sub %2, %2, #1\n\ - cmn %2, #1\n\ - beq 1f\n\ -0:\n\ - sub %2, %2, #1\n\ - ldrb r3, [%1], #1\n\ -" - PRELOADSTR ("%1") -"\n\ - cmn %2, #1\n\ - strb r3, [%0], #1\n\ - bne 0b\n\ -1:" - : "=&r" (dummy), "=&r" (src0), "=&r" (len) - : "0" (dst0), "1" (src0), "2" (len) - : "memory", "lr", "r3", "r4", "r5", "cc"); - return dst0; -} -#endif diff --git a/newlib/libc/machine/xscale/memmove.c b/newlib/libc/machine/xscale/memmove.c deleted file mode 100644 index 04d1a14d2..000000000 --- a/newlib/libc/machine/xscale/memmove.c +++ /dev/null @@ -1,122 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memmove.c" - -#else - -#include <string.h> -#include "xscale.h" - -static inline void * -do_memcpy (void *dst0, const void *src0, size_t len) -{ - int dummy; - asm volatile ( -#ifndef __OPTIMIZE_SIZE__ - "cmp %2, #0x3\n\ - bls 3f\n\ - and lr, %1, #0x3\n\ - and r3, %0, #0x3\n\ - cmp lr, r3\n\ - bne 3f\n\ - cmp lr, #0x0\n\ - beq 2f\n\ - b 1f\n\ -0:\n\ - ldrb r3, [%1], #1\n\ -" - PRELOADSTR ("%1") -"\n\ - tst %1, #0x3\n\ - strb r3, [%0], #1\n\ - beq 3f\n\ -1:\n\ - sub %2, %2, #1\n\ - cmn %2, #1\n\ - bne 0b\n\ -2:\n\ - cmp %2, #0xf\n\ - bls 1f\n\ -0:\n\ - ldmia %1!, { r3, r4, r5, lr }\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - sub %2, %2, #16\n\ - cmp %2, #0xf\n\ - stmia %0!, { r3, r4, r5, lr }\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x7\n\ - bls 1f\n\ -0:\n\ - ldmia %1!, { r3, r4 }\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - sub %2, %2, #8\n\ - cmp %2, #0x7\n\ - stmia %0!, { r3, r4 }\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 3f\n\ -0:\n\ - sub %2, %2, #4\n\ - ldr r3, [%1], #4\n\ -" - PRELOADSTR ("%1") -"\n\ -\n\ - cmp %2, #0x3\n\ - str r3, [%0], #4\n\ - bhi 0b\n\ -" -#endif /* !__OPTIMIZE_SIZE__ */ -"\n\ -3:\n\ -" - PRELOADSTR ("%1") -"\n\ - sub %2, %2, #1\n\ - cmn %2, #1\n\ - beq 1f\n\ -0:\n\ - sub %2, %2, #1\n\ - ldrb r3, [%1], #1\n\ -" - PRELOADSTR ("%1") -"\n\ - cmn %2, #1\n\ - strb r3, [%0], #1\n\ - bne 0b\n\ -1:" - : "=&r" (dummy), "=&r" (src0), "=&r" (len) - : "0" (dst0), "1" (src0), "2" (len) - : "memory", "lr", "r3", "r4", "r5", "cc"); - return dst0; -} - -void * -memmove (void *dst, const void *src, size_t len) -{ - char *d = dst; - const char *s = src; - - if (s < d && d < s + len) - { - /* Destructive overlap...have to copy backwards. */ - s += len; - d += len; - - while (len--) - *--d = *--s; - - return dst; - } - else - return do_memcpy (dst, src, len); -} -#endif diff --git a/newlib/libc/machine/xscale/memset.c b/newlib/libc/machine/xscale/memset.c deleted file mode 100644 index 8fab2a7d1..000000000 --- a/newlib/libc/machine/xscale/memset.c +++ /dev/null @@ -1,91 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memset.c" - -#else - -#include <string.h> -#include "xscale.h" -#include "../../string/local.h" - -void * -__inhibit_loop_to_libcall -memset (void *dst, int c, size_t len) -{ - int dummy; - - asm volatile ("tst %0, #0x3" -#ifndef __OPTIMIZE_SIZE__ -"\n\ - beq 1f\n\ - b 2f\n\ -0:\n\ - strb %1, [%0], #1\n\ - tst %0, #0x3\n\ - beq 1f\n\ -2:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - bne 0b\n\ -# At this point we know that %2 == len == -1 (since the SUB has already taken\n\ -# place). If we fall through to the 1: label (as the code used to do), the\n\ -# CMP will detect this negative value and branch to the 2: label. This will\n\ -# test %2 again, but this time against 0. The test will fail and the loop\n\ -# at 2: will go on for (almost) ever. Hence the explicit branch to the end\n\ -# of the hand written assembly code.\n\ - b 4f\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 2f\n\ - and %1, %1, #0xff\n\ - orr lr, %1, %1, asl #8\n\ - cmp %2, #0xf\n\ - orr lr, lr, lr, asl #16\n\ - bls 1f\n\ - mov r3, lr\n\ - mov r4, lr\n\ - mov r5, lr\n\ -0:\n\ - sub %2, %2, #16\n\ - stmia %0!, { r3, r4, r5, lr }\n\ - cmp %2, #0xf\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x7\n\ - bls 1f\n\ - mov r3, lr\n\ -0:\n\ - sub %2, %2, #8\n\ - stmia %0!, { r3, lr }\n\ - cmp %2, #0x7\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 2f\n\ -0:\n\ - sub %2, %2, #4\n\ - str lr, [%0], #4\n\ - cmp %2, #0x3\n\ - bhi 0b\n\ -" -#endif /* !__OPTIMIZE_SIZE__ */ -"\n\ -2:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - beq 4f\n\ -0:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - strb %1, [%0], #1\n\ - bne 0b\n\ -4:" - - : "=&r" (dummy), "=&r" (c), "=&r" (len) - : "0" (dst), "1" (c), "2" (len) - : "memory", "r3", "r4", "r5", "lr"); - - return dst; -} - -#endif diff --git a/newlib/libc/machine/xscale/setjmp.S b/newlib/libc/machine/xscale/setjmp.S deleted file mode 100644 index d37486090..000000000 --- a/newlib/libc/machine/xscale/setjmp.S +++ /dev/null @@ -1,137 +0,0 @@ -/* This is a simple version of setjmp and longjmp. - - Nick Clifton, Cygnus Solutions, 13 June 1997. */ - -/* ANSI concatenation macros. */ -#define CONCAT(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a##b - -#ifndef __USER_LABEL_PREFIX__ -#error __USER_LABEL_PREFIX__ not defined -#endif - -#define SYM(x) CONCAT (__USER_LABEL_PREFIX__, x) - -#ifdef __ELF__ -#define TYPE(x) .type SYM(x),function -#define SIZE(x) .size SYM(x), . - SYM(x) -#else -#define TYPE(x) -#define SIZE(x) -#endif - -/* Arm/Thumb interworking support: - - The interworking scheme expects functions to use a BX instruction - to return control to their parent. Since we need this code to work - in both interworked and non-interworked environments as well as with - older processors which do not have the BX instruction we do the - following: - Test the return address. - If the bottom bit is clear perform an "old style" function exit. - (We know that we are in ARM mode and returning to an ARM mode caller). - Otherwise use the BX instruction to perform the function exit. - - We know that we will never attempt to perform the BX instruction on - an older processor, because that kind of processor will never be - interworked, and a return address with the bottom bit set will never - be generated. - - In addition, we do not actually assemble the BX instruction as this would - require us to tell the assembler that the processor is an ARM7TDMI and - it would store this information in the binary. We want this binary to be - able to be linked with binaries compiled for older processors however, so - we do not want such information stored there. - - If we are running using the APCS-26 convention however, then we never - test the bottom bit, because this is part of the processor status. - Instead we just do a normal return, since we know that we cannot be - returning to a Thumb caller - the Thumb does not support APCS-26. - - Function entry is much simpler. If we are compiling for the Thumb we - just switch into ARM mode and then drop through into the rest of the - function. The function exit code will take care of the restore to - Thumb mode. */ - -#ifdef __APCS_26__ -#define RET movs pc, lr -#else -#define RET tst lr, #1; \ - moveq pc, lr ; \ -.word 0xe12fff1e /* bx lr */ -#endif - -#ifdef __thumb__ -#define MODE .thumb_func -.macro PROLOGUE name - .code 16 - bx pc - nop - .code 32 -SYM (.arm_start_of.\name): -.endm -#else -#define MODE .code 32 -.macro PROLOGUE name -.endm -#endif - -.macro FUNC_START name - .text - .align 2 - MODE - .globl SYM (\name) - TYPE (\name) -SYM (\name): - PROLOGUE \name -.endm - -.macro FUNC_END name - RET - SIZE (\name) -.endm - -/* -------------------------------------------------------------------- - int setjmp (jmp_buf); - -------------------------------------------------------------------- */ - - FUNC_START setjmp - - /* Save all the callee-preserved registers into the jump buffer. */ - stmea a1!, { v1-v7, fp, ip, sp, lr } - -#if 0 /* Simulator does not cope with FP instructions yet. */ -#ifndef __SOFTFP__ - /* Save the floating point registers. */ - sfmea f4, 4, [a1] -#endif -#endif - /* When setting up the jump buffer return 0. */ - mov a1, #0 - - FUNC_END setjmp - -/* -------------------------------------------------------------------- - volatile void longjmp (jmp_buf, int); - -------------------------------------------------------------------- */ - - FUNC_START longjmp - - /* If we have stack extension code it ought to be handled here. */ - - /* Restore the registers, retrieving the state when setjmp() was called. */ - ldmfd a1!, { v1-v7, fp, ip, sp, lr } - -#if 0 /* Simulator does not cope with FP instructions yet. */ -#ifndef __SOFTFP__ - /* Restore floating point registers as well. */ - lfmfd f4, 4, [a1] -#endif -#endif - /* Put the return value into the integer result register. - But if it is zero then return 1 instead. */ - movs a1, a2 - moveq a1, #1 - - FUNC_END longjmp - diff --git a/newlib/libc/machine/xscale/strchr.c b/newlib/libc/machine/xscale/strchr.c deleted file mode 100644 index 3b736c53c..000000000 --- a/newlib/libc/machine/xscale/strchr.c +++ /dev/null @@ -1,73 +0,0 @@ -#if defined __thumb__ - -#include "../../string/strchr.c" - -#else - -#include <string.h> -#include "xscale.h" - -char * -strchr (const char *s, int c) -{ - unsigned int c2; - asm (PRELOADSTR ("%0") : : "r" (s)); - - c &= 0xff; - -#ifndef __OPTIMIZE_SIZE__ - /* Skip unaligned part. */ - if ((long)s & 3) - { - s--; - do - { - int c2 = *++s; - if (c2 == c) - return (char *)s; - if (c2 == '\0') - return 0; - } - while (((long)s & 3) != 0); - } - - c2 = c + (c << 8); - c2 += c2 << 16; - - /* Load two constants: - R6 = 0xfefefeff [ == ~(0x80808080 << 1) ] - R5 = 0x80808080 */ - - asm (PRELOADSTR ("%0") "\n\ - mov r5, #0x80\n\ - add r5, r5, #0x8000\n\ - add r5, r5, r5, lsl #16\n\ - mvn r6, r5, lsl #1\n\ -\n\ - sub %0, %0, #4\n\ -0:\n\ - ldr r1, [%0, #4]!\n\ -" PRELOADSTR ("%0") "\n\ - add r3, r1, r6\n\ - bic r3, r3, r1\n\ - ands r2, r3, r5\n\ - bne 1f\n\ - eor r2, r1, %1\n\ - add r3, r2, r6\n\ - bic r3, r3, r2\n\ - ands r1, r3, r5\n\ - beq 0b\n\ -1:" - : "=&r" (s) - : "r" (c2), "0" (s) - : "r1", "r2", "r3", "r5", "r6", "cc"); -#endif - - while (*s && *s != c) - s++; - if (*s == c) - return (char *)s; - return NULL; -} - -#endif diff --git a/newlib/libc/machine/xscale/strcmp.c b/newlib/libc/machine/xscale/strcmp.c deleted file mode 100644 index 6c94d126f..000000000 --- a/newlib/libc/machine/xscale/strcmp.c +++ /dev/null @@ -1,107 +0,0 @@ -#if defined __thumb__ - -#include "../../string/strcmp.c" - -#else - -#include <string.h> -#include "xscale.h" - -int -strcmp (const char *s1, const char *s2) -{ - asm (PRELOADSTR ("%0") : : "r" (s1)); - asm (PRELOADSTR ("%0") : : "r" (s2)); - -#ifndef __OPTIMIZE_SIZE__ - if (((long)s1 & 3) == ((long)s2 & 3)) - { - int result; - - /* Skip unaligned part. */ - while ((long)s1 & 3) - { - if (*s1 == '\0' || *s1 != *s2) - goto out; - s1++; - s2++; - } - - /* Load two constants: - lr = 0xfefefeff [ == ~(0x80808080 << 1) ] - ip = 0x80808080 */ - - asm ( - "ldr r2, [%1, #0]\n\ - ldr r3, [%2, #0]\n\ - cmp r2, r3\n\ - bne 2f\n\ -\n\ - mov ip, #0x80\n\ - add ip, ip, #0x8000\n\ - add ip, ip, ip, lsl #16\n\ - mvn lr, ip, lsl #1\n\ -\n\ -0:\n\ - ldr r2, [%1, #0]\n\ - add r3, r2, lr\n\ - bic r3, r3, r2\n\ - tst r3, ip\n\ - beq 1f\n\ - mov %0, #0x0\n\ - b 3f\n\ -1:\n\ - ldr r2, [%1, #4]!\n\ - ldr r3, [%2, #4]!\n\ -" PRELOADSTR("%1") "\n\ -" PRELOADSTR("%2") "\n\ - cmp r2, r3\n\ - beq 0b" - - /* The following part could be done in a C loop as well, but it needs - to be assembler to save some cycles in the case where the optimized - loop above finds the strings to be equal. */ -"\n\ -2:\n\ - ldrb r2, [%1, #0]\n\ -" PRELOADSTR("%1") "\n\ -" PRELOADSTR("%2") "\n\ - cmp r2, #0x0\n\ - beq 1f\n\ - ldrb r3, [%2, #0]\n\ - cmp r2, r3\n\ - bne 1f\n\ -0:\n\ - ldrb r3, [%1, #1]!\n\ - add %2, %2, #1\n\ - ands ip, r3, #0xff\n\ - beq 1f\n\ - ldrb r3, [%2]\n\ - cmp ip, r3\n\ - beq 0b\n\ -1:\n\ - ldrb lr, [%1, #0]\n\ - ldrb ip, [%2, #0]\n\ - rsb %0, ip, lr\n\ -3:\n\ -" - - : "=r" (result), "=&r" (s1), "=&r" (s2) - : "1" (s1), "2" (s2) - : "lr", "ip", "r2", "r3", "cc"); - return result; - } -#endif - - while (*s1 != '\0' && *s1 == *s2) - { - asm (PRELOADSTR("%0") : : "r" (s1)); - asm (PRELOADSTR("%0") : : "r" (s2)); - s1++; - s2++; - } - out: - return (*(unsigned char *) s1) - (*(unsigned char *) s2); -} - -#endif diff --git a/newlib/libc/machine/xscale/strcpy.c b/newlib/libc/machine/xscale/strcpy.c deleted file mode 100644 index 46db2ba6a..000000000 --- a/newlib/libc/machine/xscale/strcpy.c +++ /dev/null @@ -1,62 +0,0 @@ -#if defined __thumb__ - -#include "../../string/strcpy.c" - -#else - -#include <string.h> -#include "xscale.h" - -char * -strcpy (char *dest, const char *src) -{ - char *dest0 = dest; - - asm (PRELOADSTR ("%0") : : "r" (src)); - -#ifndef __OPTIMIZE_SIZE__ - if (((long)src & 3) == ((long)dest & 3)) - { - /* Skip unaligned part. */ - while ((long)src & 3) - { - if (! (*dest++ = *src++)) - return dest0; - } - - /* Load two constants: - R4 = 0xfefefeff [ == ~(0x80808080 << 1) ] - R5 = 0x80808080 */ - - asm ("mov r5, #0x80\n\ - ldr r1, [%1, #0]\n\ - add r5, r5, #0x8000\n\ - add r5, r5, r5, lsl #16\n\ - mvn r4, r5, lsl #1\n\ -\n\ - add r3, r1, r5\n\ - bic r3, r3, r1\n\ - ands r2, r3, r4\n\ - bne 1f\n\ -0:\n\ - ldr r3, [%1, #0]\n\ - ldr r1, [%1, #4]!\n\ -" PRELOADSTR("%1") "\n\ - str r3, [%0], #4\n\ - add r2, r1, r4\n\ - bic r2, r2, r1\n\ - ands r3, r2, r5\n\ - beq 0b\n\ -1:" - : "=&r" (dest), "=&r" (src) - : "0" (dest), "1" (src) - : "r1", "r2", "r3", "r4", "r5", "memory", "cc"); - } -#endif - - while (*dest++ = *src++) - asm (PRELOADSTR ("%0") : : "r" (src)); - return dest0; -} - -#endif diff --git a/newlib/libc/machine/xscale/strlen.c b/newlib/libc/machine/xscale/strlen.c deleted file mode 100644 index 70c9a3b44..000000000 --- a/newlib/libc/machine/xscale/strlen.c +++ /dev/null @@ -1,100 +0,0 @@ -#if defined __thumb__ || defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) - -#include "../../string/strlen.c" - -#else - -#include <string.h> -#include "xscale.h" - -size_t -strlen (const char *str) -{ - const char *start = str; - - /* Skip unaligned part. */ - if ((long)str & 3) - { - str--; - do - { - if (*++str == '\0') - goto out; - } - while ((long)str & 3); - } - - /* Load two constants: - R4 = 0xfefefeff [ == ~(0x80808080 << 1) ] - R5 = 0x80808080 */ - - asm ("mov r5, #0x80\n\ - add r5, r5, #0x8000\n\ - add r5, r5, r5, lsl #16\n\ - mvn r4, r5, lsl #1\n\ -" - -#if defined __ARM_ARCH_5__ || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5E__ || defined __ARM_ARCH_5TE__ - -" tst %0, #0x7\n\ - ldreqd r6, [%0]\n\ - beq 1f\n\ - ldr r2, [%0]\n\ - add r3, r2, r4\n\ - bic r3, r3, r2\n\ - ands r2, r3, r5\n\ - bne 2f\n\ - sub %0, %0, #4\n\ -\n\ -0:\n\ - ldrd r6, [%0, #8]!\n\ -" - PRELOADSTR ("%0") -"\n\ -1:\n\ - add r3, r6, r4\n\ - add r2, r7, r4\n\ - bic r3, r3, r6\n\ - bic r2, r2, r7\n\ - and r3, r3, r5\n\ - and r2, r2, r5\n\ - orrs r3, r2, r3\n\ - beq 0b\n\ -" -#else - -" sub %0, %0, #4\n\ -\n\ -0:\n\ - ldr r6, [%0, #4]!\n\ -" - PRELOADSTR ("%0") -"\n\ - add r3, r6, r4\n\ - bic r3, r3, r6\n\ - ands r3, r3, r5\n\ - beq 0b\n\ -" -#endif /* __ARM_ARCH_5[T][E]__ */ -"\n\ -2:\n\ - ldrb r3, [%0]\n\ - cmp r3, #0x0\n\ - beq 1f\n\ -\n\ -0:\n\ - ldrb r3, [%0, #1]!\n\ -" - PRELOADSTR ("%0") -"\n\ - cmp r3, #0x0\n\ - bne 0b\n\ -1:\n\ -" - : "=r" (str) : "0" (str) : "r2", "r3", "r4", "r5", "r6", "r7"); - - out: - return str - start; -} - -#endif diff --git a/newlib/libc/machine/xscale/xscale.h b/newlib/libc/machine/xscale/xscale.h deleted file mode 100644 index c127e6653..000000000 --- a/newlib/libc/machine/xscale/xscale.h +++ /dev/null @@ -1,31 +0,0 @@ -#ifndef __XSCALE_MACH_H__ -#define __XSCALE_MACH_H__ - -/* These are predefined by new versions of GNU cpp. */ - -#ifndef __USER_LABEL_PREFIX__ -#define __USER_LABEL_PREFIX__ _ -#endif - -#ifndef __REGISTER_PREFIX__ -#define __REGISTER_PREFIX__ -#endif - -/* ANSI concatenation macros. */ - -#define CONCAT1(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a##b - -/* Use the right prefix for global labels. */ - -#define SYM(x) CONCAT1(__USER_LABEL_PREFIX__, x) - -#ifdef __XSCALE__ -#define PRELOAD(X) pld [X] -#define PRELOADSTR(X) " pld [" X "]" -#else -#define PRELOAD(X) -#define PRELOADSTR(X) "" -#endif /* __XSCALE__ */ - -#endif /* !__XSCALE_MACH_H__ */
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