From: Jojo Date: Fri, 17 Aug 2018 19:08:27 +0000 (+0000) Subject: C-SKY port: libgcc X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4cd0bc3b696fd8ea70f8e3d80d4eb4440e01f554;p=gcc.git C-SKY port: libgcc 2018-08-17 Jojo Huibin Wang Sandra Loosemore Chung-Lin Tang C-SKY port: libgcc libgcc/ * config.host: Add C-SKY support. * config/csky/*: New. Co-Authored-By: Chung-Lin Tang Co-Authored-By: Huibin Wang Co-Authored-By: Sandra Loosemore From-SVN: r263631 --- diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index d499020f91f..e800b36cacd 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,13 @@ +2018-08-17 Jojo + Huibin Wang + Sandra Loosemore + Chung-Lin Tang + + C-SKY port: libgcc + + * config.host: Add C-SKY support. + * config/csky/*: New. + 2018-08-12 Chung-Ju Wu * config/nds32/t-nds32-isr: Rearrange object dependency. diff --git a/libgcc/config.host b/libgcc/config.host index 18cabaf24f6..bd4ef1e3584 100644 --- a/libgcc/config.host +++ b/libgcc/config.host @@ -108,6 +108,9 @@ cr16-*-*) crisv32-*-*) cpu_type=cris ;; +csky*-*-*) + cpu_type=csky + ;; fido-*-*) cpu_type=m68k ;; @@ -507,6 +510,15 @@ cris-*-elf) cris-*-linux* | crisv32-*-linux*) tmake_file="$tmake_file cris/t-cris t-softfp-sfdf t-softfp cris/t-linux" ;; +csky-*-elf*) + tmake_file="csky/t-csky t-fdpbit" + extra_parts="$extra_parts crti.o crtn.o" + ;; +csky-*-linux*) + tmake_file="$tmake_file csky/t-csky t-slibgcc-libgcc t-fdpbit csky/t-linux-csky" + extra_parts="$extra_parts crti.o crtn.o" + md_unwind_header=csky/linux-unwind.h + ;; epiphany-*-elf* | epiphany-*-rtems*) tmake_file="$tmake_file epiphany/t-epiphany t-fdpbit epiphany/t-custom-eqsf" extra_parts="$extra_parts crti.o crtint.o crtrunc.o crtm1reg-r43.o crtm1reg-r63.o crtn.o" diff --git a/libgcc/config/csky/crti.S b/libgcc/config/csky/crti.S new file mode 100644 index 00000000000..3e4beb9628a --- /dev/null +++ b/libgcc/config/csky/crti.S @@ -0,0 +1,140 @@ +# Define _init and _fini entry points for C-SKY. +# Copyright (C) 2018 Free Software Foundation, Inc. +# Contributed by C-SKY Microsystems and Mentor Graphics. +# +# 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 +# . + + +# This file just makes a stack frame for the contents of the .fini and +# .init sections. Users may put any desired instructions in those +# sections. + + .file "crti.S" + +/* We use more complicated versions of this code with GLIBC. */ +#if defined(__gnu_linux__) + +#ifndef PREINIT_FUNCTION +# define PREINIT_FUNCTION __gmon_start__ +#endif + +#ifndef PREINIT_FUNCTION_WEAK +# define PREINIT_FUNCTION_WEAK 1 +#endif + +#if PREINIT_FUNCTION_WEAK + .global PREINIT_FUNCTION + .weak PREINIT_FUNCTION + .align 4 + .type call_weak_fn, %function +call_weak_fn: + // push lr + subi sp, 4 + stw lr, (sp) +#ifdef __PIC__ + lrw a2, PREINIT_FUNCTION@GOT + addu a2, gb + ldw a2, (a2) +#else + lrw a2, PREINIT_FUNCTION +#endif + cmpnei a2, 0 + bf 1f + jsr a2 +1: + // pop lr + ldw lr, (sp) + addi sp, 4 + rts + + .align 4 +#else + .hidden PREINIT_FUNCTION +#endif /* PREINIT_FUNCTION_WEAK */ + + .section .init,"ax",@progbits + .align 4 + .globl _init + .type _init, @function +_init: + subi sp, 8 + stw lr, (sp, 0) +#ifdef __PIC__ + // stw gb, (sp, 4) + bsr .Lgetpc +.Lgetpc: + lrw gb, .Lgetpc@GOTPC + add gb, lr +#endif +#if PREINIT_FUNCTION_WEAK +#ifdef __PIC__ + lrw a2, call_weak_fn@GOTOFF + add a2, gb + jsr a2 +#else + jsri call_weak_fn +#endif +#else /* !PREINIT_FUNCTION_WEAK */ +#ifdef __PIC__ + lrw a2, PREINIT_FUNCTION@PLT + addu a2, gb + ldw a2, (a2) + jsr a2 +#else + jsri PREINIT_FUNCTION +#endif +#endif /* PREINIT_FUNCTION_WEAK */ + + br 2f + .literals + .align 4 +2: + .section .fini,"ax",@progbits + .align 4 + .globl _fini + .type _fini, @function +_fini: + subi sp,8 + stw lr, (sp, 0) + br 2f + .literals + .align 4 +2: + +/* These are the non-GLIBC versions. */ +#else /* !defined(__gnu_linux__) */ + .section ".init" + .global _init + .type _init,@function + .align 2 +_init: + subi sp, 16 + st.w lr, (sp, 12) + mov r0, r0 + + .section ".fini" + .global _fini + .type _fini,@function + .align 2 +_fini: + subi sp, 16 + st.w lr, (sp, 12) + mov r0, r0 +#endif /* defined(__gnu_linux__) */ diff --git a/libgcc/config/csky/crtn.S b/libgcc/config/csky/crtn.S new file mode 100644 index 00000000000..8bef9960bf6 --- /dev/null +++ b/libgcc/config/csky/crtn.S @@ -0,0 +1,55 @@ +# Terminate C-SKY .init and .fini sections. +# Copyright (C) 2018 Free Software Foundation, Inc. +# Contributed by C-SKY Microsystems and Mentor Graphics. +# +# 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 +# . + + +# This file just makes sure that the .fini and .init sections do in +# fact return. Users may put any desired instructions in those sections. +# This file is the last thing linked into any executable. + + .file "crtn.S" + +# Is this the GLIBC version? +#if defined(__gnu_linux__) + .section .init,"ax",@progbits + ldw lr, (sp, 0) + addi sp, 8 + rts + + .section .fini,"ax",@progbits + ldw lr, (sp, 0) + addi sp, 8 + rts + +#else /* !defined(__gnu_linux__) */ + .section ".init" + ldw lr, (sp, 12) + addi sp, 16 + jmp lr + + .section ".fini" + ldw lr, (sp, 12) + addi sp, 16 + jmp lr + +# Th-th-th-that is all folks! +#endif /* defined(__gnu_linux__) */ diff --git a/libgcc/config/csky/lib1funcs.S b/libgcc/config/csky/lib1funcs.S new file mode 100644 index 00000000000..a0a3c730417 --- /dev/null +++ b/libgcc/config/csky/lib1funcs.S @@ -0,0 +1,675 @@ +/* libgcc routines for C-SKY. + Copyright (C) 2018 Free Software Foundation, Inc. + Contributed by C-SKY Microsystems and Mentor Graphics. + + This file is part of GCC. + + GCC 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 + . */ + + +/* Use the right prefix for global labels. */ +#define CONCAT1(a, b) CONCAT2(a, b) +#define CONCAT2(a, b) a ## b +#define SYM(x) CONCAT1 (__, x) + +#ifndef __CSKYBE__ +#define xl r0 +#define xh r1 +#define yl r2 +#define yh r3 +#else +#define xh r0 +#define xl r1 +#define yh r2 +#define yl r3 +#endif + + +#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 + +.macro FUNC_START name + .text + .align 2 + .globl SYM (\name) + TYPE (\name) +SYM (\name): +.endm + +.macro FUNC_END name + SIZE (\name) +.endm + + +/* Emulate FF1 ("fast find 1") instruction on ck801. + Result goes in rx, clobbering ry. */ +#if defined(__CK801__) +.macro FF1_M rx, ry + movi \rx, 32 +10: + cmphsi \ry, 1 + bf 11f + subi \rx, \rx, 1 + lsri \ry, \ry, 1 + br 10b +11: +.endm +#else +.macro FF1_M rx, ry + ff1 \rx, \ry +.endm +#endif + +/* Likewise emulate lslc instruction ("logical left shift to C") on CK801. */ +#if defined(__CK801__) +.macro LSLC_M rx + cmpne \rx, \rx + addc \rx, \rx +.endm +#else +.macro LSLC_M rx + lslc \rx +.endm +#endif + +/* Emulate the abs instruction. */ +#if defined(__CK802__) +.macro ABS_M rx + btsti \rx, 31 + bf 10f + not \rx + addi \rx, 1 +10: +.endm +#elif defined(__CK801__) +.macro ABS_M rx + cmplti \rx, 1 + bf 10f + not \rx + addi \rx, 1 +10: +.endm +#else +.macro ABS_M rx + abs \rx +.endm +#endif + +/* Emulate the ld.hs ("load signed halfword and extend") instruction + on ck801 and ck802. */ +#if defined(__CK801__) +.macro LDBS_M rx, ry + ld.b \rx, (\ry, 0x0) + sextb \rx, \rx +.endm +#else +.macro LDBS_M rx, ry + ld.bs \rx, (\ry, 0x0) +.endm +#endif + +#if defined(__CK801__) +.macro LDHS_M rx, ry + ld.h \rx, (\ry, 0x0) + sexth \rx, \rx +.endm +#else +.macro LDHS_M rx, ry + ld.hs \rx, (\ry, 0x0) +.endm +#endif + + +/* Signed and unsigned div/mod/rem functions. */ + +#ifdef L_udivsi3 +FUNC_START udiv32 +FUNC_START udivsi3 + cmpnei a1, 0 // look for 0 divisor + bt 9f + trap 3 // divide by 0 +9: + // control iterations, skip across high order 0 bits in dividend + cmpnei a0, 0 + bt 8f + jmp lr // 0 dividend quick return +8: + push l0 + movi a2, 1 // a2 is quotient (1 for a sentinel) + mov a3, a0 + FF1_M l0, a3 // figure distance to skip + lsl a2, l0 // move the sentinel along (with 0's behind) + lsl a0, l0 // and the low 32 bits of numerator + + // FIXME: Is this correct? + mov a3, a1 // looking at divisor + FF1_M l0, a3 // I can move 32-l0 more bits to left. + addi l0, 1 // ok, one short of that... + mov a3, a0 + lsr a3, l0 // bits that came from low order... + not l0 // l0 == "32-n" == LEFT distance + addi l0, 33 // this is (32-n) + lsl a2,l0 // fixes the high 32 (quotient) + lsl a0,l0 + cmpnei a2,0 + bf 4f // the sentinel went away... + + // run the remaining bits +1: + LSLC_M a0 // 1 bit left shift of a3-a0 + addc a3, a3 + cmphs a3, a1 // upper 32 of dividend >= divisor? + bf 2f + subu a3, a1 // if yes, subtract divisor +2: + addc a2, a2 // shift by 1 and count subtracts + bf 1b // if sentinel falls out of quotient, stop + +4: + mov a0, a2 // return quotient + mov a1, a3 // and piggyback the remainder + pop l0 +FUNC_END udiv32 +FUNC_END udivsi3 +#endif + +#ifdef L_umodsi3 +FUNC_START urem32 +FUNC_START umodsi3 + cmpnei a1, 0 // look for 0 divisor + bt 9f + trap 3 // divide by 0 +9: + // control iterations, skip across high order 0 bits in dividend + cmpnei a0, 0 + bt 8f + jmp lr // 0 dividend quick return +8: + mov a2, a0 + FF1_M a3, a2 // figure distance to skip + movi a2, 1 // a2 is quotient (1 for a sentinel) + lsl a2, a3 // move the sentinel along (with 0's behind) + lsl a0, a3 // and the low 32 bits of numerator + movi a3, 0 + +1: + LSLC_M a0 // 1 bit left shift of a3-a0 + addc a3, a3 + cmphs a3, a1 // upper 32 of dividend >= divisor? + bf 2f + subu a3, a1 // if yes, subtract divisor +2: + addc a2, a2 // shift by 1 and count subtracts + bf 1b // if sentinel falls out of quotient, stop + +4: + mov a0, a3 // and piggyback the remainder + jmp lr +FUNC_END urem32 +FUNC_END umodsi3 +#endif + + +#ifdef L_divsi3 +FUNC_START div32 +FUNC_START divsi3 + cmpnei a1, 0 // look for 0 divisor + bt 9f + trap 3 // divide by 0 +9: + // control iterations, skip across high order 0 bits in dividend + cmpnei a0, 0 + bt 8f + jmp lr // 0 dividend quick return +8: + push l0, l1 + mov l1, a0 + xor l1, a1 // calc sign of quotient + ABS_M a0 + ABS_M a1 + movi a2, 1 // a2 is quotient (1 for a sentinel) + mov a3, a0 + FF1_M l0, a3 // figure distance to skip + lsl a2, l0 // move the sentinel along (with 0's behind) + lsl a0, l0 // and the low 32 bits of numerator + + // FIXME: is this correct? + mov a3, a1 // looking at divisor + FF1_M l0, a3 // I can move 32-l0 more bits to left. + addi l0, 1 // ok, one short of that... + mov a3, a0 + lsr a3, l0 // bits that came from low order... + not l0 // l0 == "32-n" == LEFT distance + addi l0, 33 // this is (32-n) + lsl a2,l0 // fixes the high 32 (quotient) + lsl a0,l0 + cmpnei a2,0 + bf 4f // the sentinel went away... + + // run the remaining bits +1: + LSLC_M a0 // 1 bit left shift of a3-a0 + addc a3, a3 + cmphs a3, a1 // upper 32 of dividend >= divisor? + bf 2f + subu a3, a1 // if yes, subtract divisor +2: + addc a2, a2 // shift by 1 and count subtracts + bf 1b // if sentinel falls out of quotient, stop + +4: + mov a0, a2 // return quotient + mov a1, a3 // and piggyback the remainder + LSLC_M l1 // after adjusting for sign + bf 3f + not a0 + addi a0, 1 + not a1 + addi a1, 1 +3: + pop l0, l1 +FUNC_END div32 +FUNC_END divsi3 +#endif + +#ifdef L_modsi3 +FUNC_START rem32 +FUNC_START modsi3 + push l0 + cmpnei a1, 0 // look for 0 divisor + bt 9f + trap 3 // divide by 0 +9: + // control iterations, skip across high order 0 bits in dividend + cmpnei a0, 0 + bt 8f + pop l0 // 0 dividend quick return +8: + mov l0, a0 + ABS_M a0 + ABS_M a1 + mov a2, a0 + FF1_M a3, a2 // figure distance to skip + movi a2, 1 // a2 is quotient (1 for a sentinel) + lsl a2, a3 // move the sentinel along (with 0's behind) + lsl a0, a3 // and the low 32 bits of numerator + movi a3, 0 + + // run the remaining bits +1: + LSLC_M a0 // 1 bit left shift of a3-a0 + addc a3, a3 + cmphs a3, a1 // upper 32 of dividend >= divisor? + bf 2f + subu a3, a1 // if yes, subtract divisor +2: + addc a2, a2 // shift by 1 and count subtracts + bf 1b // if sentinel falls out of quotient, stop + +4: + mov a0, a3 // and piggyback the remainder + LSLC_M l0 // after adjusting for sign + bf 3f + not a0 + addi a0, 1 +3: + pop l0 +FUNC_END rem32 +FUNC_END modsi3 +#endif + +/* Unordered comparisons for single and double float. */ + +#ifdef L_unordsf2 +FUNC_START unordsf2 +#if defined(__CK801__) + subi sp, 4 + st.w r4, (sp, 0x0) + lsli r2, r0, 1 + lsli r3, r1, 1 + asri r4, r2, 24 + not r4 + cmpnei r4, 0 + bt 1f + lsli r4, r0, 9 + cmpnei r4, 0 + bt 3f +1: + asri r4, r3, 24 + not r4 + cmpnei r4, 0 + bt 2f + lsli r4, r1, 9 + cmpnei r4, 0 + bt 3f +2: + ld.w r4, (sp, 0x0) + addi sp, 4 + movi r0, 0 + rts +3: + ld.w r4, (sp, 0x0) + addi sp, 4 + movi r0, 1 + rts +#elif defined(__CK802__) + lsli r2, r0, 1 + lsli r3, r1, 1 + asri r2, r2, 24 + not r13, r2 + cmpnei r13, 0 + bt 1f + lsli r13, r0, 9 + cmpnei r13, 0 + bt 3f +1: + asri r3, r3, 24 + not r13, r3 + cmpnei r13, 0 + bt 2f + lsli r13, r1, 9 + cmpnei r13, 0 + bt 3f +2: + movi r0, 0 + rts +3: + movi r0, 1 + rts +#else + lsli r2, r0, 1 + lsli r3, r1, 1 + asri r2, r2, 24 + not r13, r2 + bnez r13, 1f + lsli r13, r0, 9 + bnez r13, 3f +1: + asri r3, r3, 24 + not r13, r3 + bnez r13, 2f + lsli r13, r1, 9 + bnez r13, 3f +2: + movi r0, 0 + rts +3: + movi r0, 1 + rts +#endif +FUNC_END unordsf2 +#endif + +#ifdef L_unorddf2 +FUNC_START unorddf2 +#if defined(__CK801__) + subi sp, 8 + st.w r4, (sp, 0x0) + st.w r5, (sp, 0x4) + lsli r4, xh, 1 + asri r4, r4, 21 + not r4 + cmpnei r4, 0 + bt 1f + mov r4, xl + lsli r5, xh, 12 + or r4, r5 + cmpnei r4, 0 + bt 3f +1: + lsli r4, yh, 1 + asri r4, r4, 21 + not r4 + cmpnei r4, 0 + bt 2f + mov r4,yl + lsli r5, yh, 12 + or r4, r5 + cmpnei r4, 0 + bt 3f +2: + ld.w r4, (sp, 0x0) + ld.w r5, (sp, 0x4) + addi sp, 8 + movi r0, 0 + rts +3: + ld.w r4, (sp, 0x0) + ld.w r5, (sp, 0x4) + addi sp, 8 + movi r0, 1 + rts +#elif defined(__CK802__) + lsli r13, xh, 1 + asri r13, r13, 21 + not r13 + cmpnei r13, 0 + bt 1f + lsli xh, xh, 12 + or r13, xl, xh + cmpnei r13, 0 + bt 3f +1: + lsli r13, yh, 1 + asri r13, r13, 21 + not r13 + cmpnei r13, 0 + bt 2f + lsli yh, yh, 12 + or r13, yl, yh + cmpnei r13, 0 + bt 3f +2: + movi r0, 0 + rts +3: + movi r0, 1 + rts +#else + lsli r13, xh, 1 + asri r13, r13, 21 + not r13 + bnez r13, 1f + lsli xh, xh, 12 + or r13, xl, xh + bnez r13, 3f +1: + lsli r13, yh, 1 + asri r13, r13, 21 + not r13 + bnez r13, 2f + lsli yh, yh, 12 + or r13, yl, yh + bnez r13, 3f +2: + movi r0, 0 + rts +3: + movi r0, 1 + rts +#endif +FUNC_END unorddf2 +#endif + +/* When optimizing for size on ck801 and ck802, GCC emits calls to the + following helper functions when expanding casesi, instead of emitting + the table lookup and jump inline. Note that in these functions the + jump is handled by tweaking the value of lr before rts. */ +#ifdef L_csky_case_sqi +FUNC_START _gnu_csky_case_sqi + subi sp, 4 + st.w a1, (sp, 0x0) + mov a1, lr + add a1, a1, a0 + LDBS_M a1, a1 + lsli a1, a1, 1 + add lr, lr, a1 + ld.w a1, (sp, 0x0) + addi sp, 4 + rts +FUNC_END _gnu_csky_case_sqi +#endif + +#ifdef L_csky_case_uqi +FUNC_START _gnu_csky_case_uqi + subi sp, 4 + st.w a1, (sp, 0x0) + mov a1, lr + add a1, a1, a0 + ld.b a1, (a1, 0x0) + lsli a1, a1, 1 + add lr, lr, a1 + ld.w a1, (sp, 0x0) + addi sp, 4 + rts +FUNC_END _gnu_csky_case_uqi +#endif + +#ifdef L_csky_case_shi +FUNC_START _gnu_csky_case_shi + subi sp, 8 + st.w a0, (sp, 0x4) + st.w a1, (sp, 0x0) + mov a1, lr + lsli a0, a0, 1 + add a1, a1, a0 + LDHS_M a1, a1 + lsli a1, a1, 1 + add lr, lr, a1 + ld.w a0, (sp, 0x4) + ld.w a1, (sp, 0x0) + addi sp, 8 + rts +FUNC_END _gnu_csky_case_shi +#endif + +#ifdef L_csky_case_uhi +FUNC_START _gnu_csky_case_uhi + subi sp, 8 + st.w a0, (sp, 0x4) + st.w a1, (sp, 0x0) + mov a1, lr + lsli a0, a0, 1 + add a1, a1, a0 + ld.h a1, (a1, 0x0) + lsli a1, a1, 1 + add lr, lr, a1 + ld.w a0, (sp, 0x4) + ld.w a1, (sp, 0x0) + addi sp, 8 + rts +FUNC_END _gnu_csky_case_uhi +#endif + +#ifdef L_csky_case_si +FUNC_START _gnu_csky_case_si + subi sp, 8 + st.w a0, (sp, 0x4) + st.w a1, (sp, 0x0) + mov a1, lr + addi a1, a1, 2 // Align to word. + bclri a1, a1, 1 + mov lr, a1 + lsli a0, a0, 2 + add a1, a1, a0 + ld.w a0, (a1, 0x0) + add lr, lr, a0 + ld.w a0, (sp, 0x4) + ld.w a1, (sp, 0x0) + addi sp, 8 + rts +FUNC_END _gnu_csky_case_si +#endif + +/* GCC expects that {__eq,__ne,__gt,__ge,__le,__lt}{df2,sf2} + will behave as __cmpdf2. So, we stub the implementations to + jump on to __cmpdf2 and __cmpsf2. + + All of these short-circuit the return path so that __cmp{sd}f2 + will go directly back to the caller. */ + +.macro COMPARE_DF_JUMP name + .import SYM (cmpdf2) +FUNC_START \name + jmpi SYM (cmpdf2) +FUNC_END \name +.endm + +#ifdef L_eqdf2 +COMPARE_DF_JUMP eqdf2 +#endif /* L_eqdf2 */ + +#ifdef L_nedf2 +COMPARE_DF_JUMP nedf2 +#endif /* L_nedf2 */ + +#ifdef L_gtdf2 +COMPARE_DF_JUMP gtdf2 +#endif /* L_gtdf2 */ + +#ifdef L_gedf2 +COMPARE_DF_JUMP gedf2 +#endif /* L_gedf2 */ + +#ifdef L_ltdf2 +COMPARE_DF_JUMP ltdf2 +#endif /* L_ltdf2 */ + +#ifdef L_ledf2 +COMPARE_DF_JUMP ledf2 +#endif /* L_ledf2 */ + +/* Single-precision floating point stubs. */ + +.macro COMPARE_SF_JUMP name + .import SYM (cmpsf2) +FUNC_START \name + jmpi SYM (cmpsf2) +FUNC_END \name +.endm + +#ifdef L_eqsf2 +COMPARE_SF_JUMP eqsf2 +#endif /* L_eqsf2 */ + +#ifdef L_nesf2 +COMPARE_SF_JUMP nesf2 +#endif /* L_nesf2 */ + +#ifdef L_gtsf2 +COMPARE_SF_JUMP gtsf2 +#endif /* L_gtsf2 */ + +#ifdef L_gesf2 +COMPARE_SF_JUMP __gesf2 +#endif /* L_gesf2 */ + +#ifdef L_ltsf2 +COMPARE_SF_JUMP __ltsf2 +#endif /* L_ltsf2 */ + +#ifdef L_lesf2 +COMPARE_SF_JUMP lesf2 +#endif /* L_lesf2 */ diff --git a/libgcc/config/csky/linux-atomic.c b/libgcc/config/csky/linux-atomic.c new file mode 100644 index 00000000000..03cf2c02fbb --- /dev/null +++ b/libgcc/config/csky/linux-atomic.c @@ -0,0 +1,299 @@ +/* Linux-specific atomic operations for C-SKY. + Copyright (C) 2018 Free Software Foundation, Inc. + Contributed by C-SKY Microsystems and Mentor Graphics. + + This file is part of GCC. + + GCC 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. + + GCC 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 + . */ + +/* Kernel helper for compare-and-exchange. */ +inline int +__kernel_cmpxchg (int oldval, int newval, volatile int *ptr) +{ + register int _a0 asm ("a0") = oldval; + register int _a1 asm ("a1") = newval; + register volatile int *_a2 asm ("a2") = ptr; + __asm__ __volatile__ ("trap 2\n" \ + :"+r" (_a0) :"r" (_a1) , "r" (_a2) \ + : "a3", "memory"); \ + return _a0; +} + + +/* Kernel helper for memory barrier. */ +inline void __kernel_dmb (void) +{ + asm ("sync":::"memory"); +} + +/* Note: we implement byte, short and int versions of atomic operations using + the above kernel helpers, but there is no support for "long long" (64-bit) + operations as yet. */ + +#define HIDDEN __attribute__ ((visibility ("hidden"))) + +#ifdef __CSKYLE__ +#define INVERT_MASK_1 0 +#define INVERT_MASK_2 0 +#else +#define INVERT_MASK_1 24 +#define INVERT_MASK_2 16 +#endif + +#define MASK_1 0xffu +#define MASK_2 0xffffu + +#define FETCH_AND_OP_WORD(OP, PFX_OP, INF_OP) \ + int HIDDEN \ + __sync_fetch_and_##OP##_4 (int *ptr, int val) \ + { \ + int failure, tmp; \ + \ + do \ + { \ + tmp = *ptr; \ + failure = __kernel_cmpxchg (tmp, PFX_OP (tmp INF_OP val), ptr); \ + } \ + while (failure != 0); \ + \ + return tmp; \ + } + +FETCH_AND_OP_WORD (add, , +) +FETCH_AND_OP_WORD (sub, , -) +FETCH_AND_OP_WORD (or, , |) +FETCH_AND_OP_WORD (and, , &) +FETCH_AND_OP_WORD (xor, , ^) +FETCH_AND_OP_WORD (nand, ~, &) + +#define NAME_oldval(OP, WIDTH) __sync_fetch_and_##OP##_##WIDTH +#define NAME_newval(OP, WIDTH) __sync_##OP##_and_fetch_##WIDTH + +/* Implement both __sync__and_fetch and __sync_fetch_and_ for + subword-sized quantities. */ + +#define SUBWORD_SYNC_OP(OP, PFX_OP, INF_OP, TYPE, WIDTH, RETURN) \ + TYPE HIDDEN \ + NAME##_##RETURN (OP, WIDTH) (TYPE *ptr, TYPE val) \ + { \ + int *wordptr = (int *) ((unsigned int) ptr & ~3); \ + unsigned int mask, shift, oldval, newval; \ + int failure; \ + \ + shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \ + mask = MASK_##WIDTH << shift; \ + \ + do \ + { \ + oldval = *wordptr; \ + newval = ((PFX_OP (((oldval & mask) >> shift) \ + INF_OP (unsigned int) val)) << shift) & mask; \ + newval |= oldval & ~mask; \ + failure = __kernel_cmpxchg (oldval, newval, wordptr); \ + } \ + while (failure != 0); \ + \ + return (RETURN & mask) >> shift; \ + } + +SUBWORD_SYNC_OP (add, , +, unsigned short, 2, oldval) +SUBWORD_SYNC_OP (sub, , -, unsigned short, 2, oldval) +SUBWORD_SYNC_OP (or, , |, unsigned short, 2, oldval) +SUBWORD_SYNC_OP (and, , &, unsigned short, 2, oldval) +SUBWORD_SYNC_OP (xor, , ^, unsigned short, 2, oldval) +SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, oldval) + +SUBWORD_SYNC_OP (add, , +, unsigned char, 1, oldval) +SUBWORD_SYNC_OP (sub, , -, unsigned char, 1, oldval) +SUBWORD_SYNC_OP (or, , |, unsigned char, 1, oldval) +SUBWORD_SYNC_OP (and, , &, unsigned char, 1, oldval) +SUBWORD_SYNC_OP (xor, , ^, unsigned char, 1, oldval) +SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, oldval) + +#define OP_AND_FETCH_WORD(OP, PFX_OP, INF_OP) \ + int HIDDEN \ + __sync_##OP##_and_fetch_4 (int *ptr, int val) \ + { \ + int tmp, failure; \ + \ + do \ + { \ + tmp = *ptr; \ + failure = __kernel_cmpxchg (tmp, PFX_OP tmp INF_OP val, ptr); \ + } \ + while (failure != 0); \ + \ + return PFX_OP tmp INF_OP val; \ + } + +OP_AND_FETCH_WORD (add, , +) +OP_AND_FETCH_WORD (sub, , -) +OP_AND_FETCH_WORD (or, , |) +OP_AND_FETCH_WORD (and, , &) +OP_AND_FETCH_WORD (xor, , ^) +OP_AND_FETCH_WORD (nand, ~, &) + +SUBWORD_SYNC_OP (add, , +, unsigned short, 2, newval) +SUBWORD_SYNC_OP (sub, , -, unsigned short, 2, newval) +SUBWORD_SYNC_OP (or, , |, unsigned short, 2, newval) +SUBWORD_SYNC_OP (and, , &, unsigned short, 2, newval) +SUBWORD_SYNC_OP (xor, , ^, unsigned short, 2, newval) +SUBWORD_SYNC_OP (nand, ~, &, unsigned short, 2, newval) + +SUBWORD_SYNC_OP (add, , +, unsigned char, 1, newval) +SUBWORD_SYNC_OP (sub, , -, unsigned char, 1, newval) +SUBWORD_SYNC_OP (or, , |, unsigned char, 1, newval) +SUBWORD_SYNC_OP (and, , &, unsigned char, 1, newval) +SUBWORD_SYNC_OP (xor, , ^, unsigned char, 1, newval) +SUBWORD_SYNC_OP (nand, ~, &, unsigned char, 1, newval) + +int HIDDEN +__sync_val_compare_and_swap_4 (int *ptr, int oldval, int newval) +{ + int actual_oldval, fail; + + while (1) + { + actual_oldval = *ptr; + + if (oldval != actual_oldval) + return actual_oldval; + + fail = __kernel_cmpxchg (actual_oldval, newval, ptr); + + if (!fail) + return oldval; + } +} + +#define SUBWORD_VAL_CAS(TYPE, WIDTH) \ + TYPE HIDDEN \ + __sync_val_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \ + TYPE newval) \ + { \ + int *wordptr = (int *)((unsigned int) ptr & ~3), fail; \ + unsigned int mask, shift, actual_oldval, actual_newval; \ + \ + shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \ + mask = MASK_##WIDTH << shift; \ + \ + while (1) \ + { \ + actual_oldval = *wordptr; \ + \ + if (((actual_oldval & mask) >> shift) != (unsigned int) oldval) \ + return (actual_oldval & mask) >> shift; \ + \ + actual_newval = (actual_oldval & ~mask) \ + | (((unsigned int) newval << shift) & mask); \ + \ + fail = __kernel_cmpxchg (actual_oldval, actual_newval, \ + wordptr); \ + \ + if (!fail) \ + return oldval; \ + } \ + } + +SUBWORD_VAL_CAS (unsigned short, 2) +SUBWORD_VAL_CAS (unsigned char, 1) + +typedef unsigned char bool; + +bool HIDDEN +__sync_bool_compare_and_swap_4 (int *ptr, int oldval, int newval) +{ + int failure = __kernel_cmpxchg (oldval, newval, ptr); + return (failure == 0); +} + +#define SUBWORD_BOOL_CAS(TYPE, WIDTH) \ + bool HIDDEN \ + __sync_bool_compare_and_swap_##WIDTH (TYPE *ptr, TYPE oldval, \ + TYPE newval) \ + { \ + TYPE actual_oldval \ + = __sync_val_compare_and_swap_##WIDTH (ptr, oldval, newval); \ + return (oldval == actual_oldval); \ + } + +SUBWORD_BOOL_CAS (unsigned short, 2) +SUBWORD_BOOL_CAS (unsigned char, 1) + +void HIDDEN +__sync_synchronize (void) +{ + __kernel_dmb (); +} + +int HIDDEN +__sync_lock_test_and_set_4 (int *ptr, int val) +{ + int failure, oldval; + + do + { + oldval = *ptr; + failure = __kernel_cmpxchg (oldval, val, ptr); + } + while (failure != 0); + + return oldval; +} + +#define SUBWORD_TEST_AND_SET(TYPE, WIDTH) \ + TYPE HIDDEN \ + __sync_lock_test_and_set_##WIDTH (TYPE *ptr, TYPE val) \ + { \ + int failure; \ + unsigned int oldval, newval, shift, mask; \ + int *wordptr = (int *) ((unsigned int) ptr & ~3); \ + \ + shift = (((unsigned int) ptr & 3) << 3) ^ INVERT_MASK_##WIDTH; \ + mask = MASK_##WIDTH << shift; \ + \ + do \ + { \ + oldval = *wordptr; \ + newval = ((oldval & ~mask) \ + | (((unsigned int) val << shift) & mask)); \ + failure = __kernel_cmpxchg (oldval, newval, wordptr); \ + } \ + while (failure != 0); \ + \ + return (oldval & mask) >> shift; \ + } + +SUBWORD_TEST_AND_SET (unsigned short, 2) +SUBWORD_TEST_AND_SET (unsigned char, 1) + +#define SYNC_LOCK_RELEASE(TYPE, WIDTH) \ + void HIDDEN \ + __sync_lock_release_##WIDTH (TYPE *ptr) \ + { \ + /* All writes before this point must be seen before we release \ + the lock itself. */ \ + __kernel_dmb (); \ + *ptr = 0; \ + } + +SYNC_LOCK_RELEASE (int, 4) +SYNC_LOCK_RELEASE (short, 2) +SYNC_LOCK_RELEASE (char, 1) diff --git a/libgcc/config/csky/linux-unwind.h b/libgcc/config/csky/linux-unwind.h new file mode 100644 index 00000000000..24638defd52 --- /dev/null +++ b/libgcc/config/csky/linux-unwind.h @@ -0,0 +1,131 @@ +/* DWARF2 EH unwinding support for C-SKY Linux. + Copyright (C) 2018 Free Software Foundation, Inc. + Contributed by C-SKY Microsystems and Mentor Graphics. + + This file is part of GCC. + + GCC 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. + + GCC 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 + . */ + +#ifndef inhibit_libc + +/* Do code reading to identify a signal frame, and set the frame + state data appropriately. See unwind-dw2.c for the structs. */ + +#include +#include + +/* The third parameter to the signal handler points to something with + this structure defined in asm/ucontext.h, but the name clashes with + struct ucontext from sys/ucontext.h so this private copy is used. */ +typedef struct _sig_ucontext { + unsigned long uc_flags; + struct _sig_ucontext *uc_link; + stack_t uc_stack; + struct sigcontext uc_mcontext; + sigset_t uc_sigmask; +} _sig_ucontext_t; + +#define MD_FALLBACK_FRAME_STATE_FOR csky_fallback_frame_state + +static _Unwind_Reason_Code +csky_fallback_frame_state (struct _Unwind_Context *context, + _Unwind_FrameState *fs) +{ + u_int16_t *pc = (u_int16_t *) context->ra; + struct sigcontext *sc; + _Unwind_Ptr new_cfa; + int i; + + /* movi r7, __NR_rt_sigreturn; trap 0 */ + if ((*(pc+0) == 0xea07) && (*(pc+1) == 119) + && (*(pc+2) == 0xc000) && (*(pc+3) == 0x2020)) + { + struct sigframe + { + int sig; + int code; + struct sigcontext *psc; + unsigned long extramask[2]; /* _NSIG_WORDS */ + struct sigcontext sc; + } *_rt = context->cfa; + sc = _rt->psc; // &(_rt->sc); + } + /* movi r7, __NR_rt_sigreturn; trap 0 */ + else if ((*(pc+0) == 0xea07) && (*(pc+1) == 173) + && (*(pc+2) == 0xc000) && (*(pc+3) == 0x2020)) + { + struct rt_sigframe + { + int sig; + struct siginfo *pinfo; + void* puc; + siginfo_t info; + struct ucontext uc; + } *_rt = context->cfa; + sc = &(_rt->uc.uc_mcontext); + } + else + return _URC_END_OF_STACK; + + new_cfa = (_Unwind_Ptr) sc->sc_usp; + fs->regs.cfa_how = CFA_REG_OFFSET; + fs->regs.cfa_reg = STACK_POINTER_REGNUM; + fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa; + + fs->regs.reg[0].how = REG_SAVED_OFFSET; + fs->regs.reg[0].loc.offset = (_Unwind_Ptr)&(sc->sc_a0) - new_cfa; + + fs->regs.reg[1].how = REG_SAVED_OFFSET; + fs->regs.reg[1].loc.offset = (_Unwind_Ptr)&(sc->sc_a1) - new_cfa; + + fs->regs.reg[2].how = REG_SAVED_OFFSET; + fs->regs.reg[2].loc.offset = (_Unwind_Ptr)&(sc->sc_a2) - new_cfa; + + fs->regs.reg[3].how = REG_SAVED_OFFSET; + fs->regs.reg[3].loc.offset = (_Unwind_Ptr)&(sc->sc_a3) - new_cfa; + + for (i = 4; i < 14; i++) + { + fs->regs.reg[i].how = REG_SAVED_OFFSET; + fs->regs.reg[i].loc.offset = ((_Unwind_Ptr)&(sc->sc_regs[i - 4]) + - new_cfa); + } + + for (i = 16; i < 32; i++) + { + fs->regs.reg[i].how = REG_SAVED_OFFSET; + fs->regs.reg[i].loc.offset = ((_Unwind_Ptr)&(sc->sc_exregs[i - 16]) + - new_cfa); + } + + /* FIXME : hi lo ? */ + fs->regs.reg[15].how = REG_SAVED_OFFSET; + fs->regs.reg[15].loc.offset = (_Unwind_Ptr)&(sc->sc_r15) - new_cfa; + + fs->regs.reg[56].how = REG_SAVED_OFFSET; + fs->regs.reg[56].loc.offset = (_Unwind_Ptr)&(sc->sc_pc) - new_cfa; + fs->retaddr_column = 56; + fs->signal_frame = 1; + + return _URC_NO_REASON; +} + + +#endif diff --git a/libgcc/config/csky/t-csky b/libgcc/config/csky/t-csky new file mode 100644 index 00000000000..06aa1c121f9 --- /dev/null +++ b/libgcc/config/csky/t-csky @@ -0,0 +1,28 @@ +# Makefile fragment for all C-SKY targets. +# Copyright (C) 2018 Free Software Foundation, Inc. +# Contributed by C-SKY Microsystems and Mentor Graphics. +# +# This file is part of GCC. +# +# GCC 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. +# +# GCC 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. +# +# You should have received a copy of the GNU General Public License +# along with GCC; see the file COPYING3. If not see +# . + +LIB1ASMSRC = csky/lib1funcs.S +LIB1ASMFUNCS = _divsi3 _udivsi3 _modsi3 _umodsi3 _unorddf2 _unordsf2 \ + _csky_case_sqi _csky_case_uqi _csky_case_shi _csky_case_uhi _csky_case_si + +LIB2FUNCS_EXCLUDE += _unord_df +LIB2FUNCS_EXCLUDE += _unord_sf + +TARGET_LIBGCC2_CFLAGS=-O3 -DNO_FLOATLIB_FIXUNSDFSI diff --git a/libgcc/config/csky/t-linux-csky b/libgcc/config/csky/t-linux-csky new file mode 100644 index 00000000000..1f5c4ce1a73 --- /dev/null +++ b/libgcc/config/csky/t-linux-csky @@ -0,0 +1,21 @@ +# Makefile fragment for C-SKY targets running Linux. +# Copyright (C) 2018 Free Software Foundation, Inc. +# Contributed by C-SKY Microsystems and Mentor Graphics. +# +# This file is part of GCC. +# +# GCC 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. +# +# GCC 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. +# +# You should have received a copy of the GNU General Public License +# along with GCC; see the file COPYING3. If not see +# . + +LIB2ADD_ST += $(srcdir)/config/csky/linux-atomic.c