diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/arm/bpabi.S')
| -rw-r--r-- | gcc-4.9/libgcc/config/arm/bpabi.S | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/arm/bpabi.S b/gcc-4.9/libgcc/config/arm/bpabi.S new file mode 100644 index 000000000..777230154 --- /dev/null +++ b/gcc-4.9/libgcc/config/arm/bpabi.S @@ -0,0 +1,168 @@ +/* Miscellaneous BPABI functions. + + Copyright (C) 2003-2014 Free Software Foundation, Inc. + Contributed by CodeSourcery, LLC. + + This file is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 3, or (at your option) any + later version. + + This file is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifdef __ARM_EABI__ +/* Some attributes that are common to all routines in this file. */ + /* Tag_ABI_align_needed: This code does not require 8-byte + alignment from the caller. */ + /* .eabi_attribute 24, 0 -- default setting. */ + /* Tag_ABI_align_preserved: This code preserves 8-byte + alignment in any callee. */ + .eabi_attribute 25, 1 +#endif /* __ARM_EABI__ */ + +#ifdef L_aeabi_lcmp + +ARM_FUNC_START aeabi_lcmp + cmp xxh, yyh + do_it lt + movlt r0, #-1 + do_it gt + movgt r0, #1 + do_it ne + RETc(ne) + subs r0, xxl, yyl + do_it lo + movlo r0, #-1 + do_it hi + movhi r0, #1 + RET + FUNC_END aeabi_lcmp + +#endif /* L_aeabi_lcmp */ + +#ifdef L_aeabi_ulcmp + +ARM_FUNC_START aeabi_ulcmp + cmp xxh, yyh + do_it lo + movlo r0, #-1 + do_it hi + movhi r0, #1 + do_it ne + RETc(ne) + cmp xxl, yyl + do_it lo + movlo r0, #-1 + do_it hi + movhi r0, #1 + do_it eq + moveq r0, #0 + RET + FUNC_END aeabi_ulcmp + +#endif /* L_aeabi_ulcmp */ + +.macro test_div_by_zero signed +/* Tail-call to divide-by-zero handlers which may be overridden by the user, + so unwinding works properly. */ +#if defined(__thumb2__) + cbnz yyh, 1f + cbnz yyl, 1f + cmp xxh, #0 + do_it eq + cmpeq xxl, #0 + .ifc \signed, unsigned + beq 2f + mov xxh, #0xffffffff + mov xxl, xxh +2: + .else + do_it lt, t + movlt xxl, #0 + movlt xxh, #0x80000000 + do_it gt, t + movgt xxh, #0x7fffffff + movgt xxl, #0xffffffff + .endif + b SYM (__aeabi_ldiv0) __PLT__ +1: +#else + /* Note: Thumb-1 code calls via an ARM shim on processors which + support ARM mode. */ + cmp yyh, #0 + cmpeq yyl, #0 + bne 2f + cmp xxh, #0 + cmpeq xxl, #0 + .ifc \signed, unsigned + movne xxh, #0xffffffff + movne xxl, #0xffffffff + .else + movlt xxh, #0x80000000 + movlt xxl, #0 + movgt xxh, #0x7fffffff + movgt xxl, #0xffffffff + .endif + b SYM (__aeabi_ldiv0) __PLT__ +2: +#endif +.endm + +#ifdef L_aeabi_ldivmod + +ARM_FUNC_START aeabi_ldivmod + cfi_start __aeabi_ldivmod, LSYM(Lend_aeabi_ldivmod) + test_div_by_zero signed + + sub sp, sp, #8 +#if defined(__thumb2__) + mov ip, sp + push {ip, lr} +#else + do_push {sp, lr} +#endif +98: cfi_push 98b - __aeabi_ldivmod, 0xe, -0xc, 0x10 + bl SYM(__gnu_ldivmod_helper) __PLT__ + ldr lr, [sp, #4] + add sp, sp, #8 + do_pop {r2, r3} + RET + cfi_end LSYM(Lend_aeabi_ldivmod) + +#endif /* L_aeabi_ldivmod */ + +#ifdef L_aeabi_uldivmod + +ARM_FUNC_START aeabi_uldivmod + cfi_start __aeabi_uldivmod, LSYM(Lend_aeabi_uldivmod) + test_div_by_zero unsigned + + sub sp, sp, #8 +#if defined(__thumb2__) + mov ip, sp + push {ip, lr} +#else + do_push {sp, lr} +#endif +98: cfi_push 98b - __aeabi_uldivmod, 0xe, -0xc, 0x10 + bl SYM(__gnu_uldivmod_helper) __PLT__ + ldr lr, [sp, #4] + add sp, sp, #8 + do_pop {r2, r3} + RET + cfi_end LSYM(Lend_aeabi_uldivmod) + +#endif /* L_aeabi_divmod */ + |