| /* |
| * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_CPU_LINUX_X86_VM_COPY_LINUX_X86_INLINE_HPP |
| #define OS_CPU_LINUX_X86_VM_COPY_LINUX_X86_INLINE_HPP |
| |
| static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| (void)memmove(to, from, count * HeapWordSize); |
| #else |
| // Includes a zero-count check. |
| intx temp = 0; |
| __asm__ volatile(" testl %6,%6 ;" |
| " jz 7f ;" |
| " cmpl %4,%5 ;" |
| " leal -4(%4,%6,4),%3;" |
| " jbe 1f ;" |
| " cmpl %7,%5 ;" |
| " jbe 4f ;" |
| "1: cmpl $32,%6 ;" |
| " ja 3f ;" |
| " subl %4,%1 ;" |
| "2: movl (%4),%3 ;" |
| " movl %7,(%5,%4,1) ;" |
| " addl $4,%0 ;" |
| " subl $1,%2 ;" |
| " jnz 2b ;" |
| " jmp 7f ;" |
| "3: rep; smovl ;" |
| " jmp 7f ;" |
| "4: cmpl $32,%2 ;" |
| " movl %7,%0 ;" |
| " leal -4(%5,%6,4),%1;" |
| " ja 6f ;" |
| " subl %4,%1 ;" |
| "5: movl (%4),%3 ;" |
| " movl %7,(%5,%4,1) ;" |
| " subl $4,%0 ;" |
| " subl $1,%2 ;" |
| " jnz 5b ;" |
| " jmp 7f ;" |
| "6: std ;" |
| " rep; smovl ;" |
| " cld ;" |
| "7: nop " |
| : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) |
| : "0" (from), "1" (to), "2" (count), "3" (temp) |
| : "memory", "flags"); |
| #endif // AMD64 |
| } |
| |
| static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| switch (count) { |
| case 8: to[7] = from[7]; |
| case 7: to[6] = from[6]; |
| case 6: to[5] = from[5]; |
| case 5: to[4] = from[4]; |
| case 4: to[3] = from[3]; |
| case 3: to[2] = from[2]; |
| case 2: to[1] = from[1]; |
| case 1: to[0] = from[0]; |
| case 0: break; |
| default: |
| (void)memcpy(to, from, count * HeapWordSize); |
| break; |
| } |
| #else |
| // Includes a zero-count check. |
| intx temp = 0; |
| __asm__ volatile(" testl %6,%6 ;" |
| " jz 3f ;" |
| " cmpl $32,%6 ;" |
| " ja 2f ;" |
| " subl %4,%1 ;" |
| "1: movl (%4),%3 ;" |
| " movl %7,(%5,%4,1);" |
| " addl $4,%0 ;" |
| " subl $1,%2 ;" |
| " jnz 1b ;" |
| " jmp 3f ;" |
| "2: rep; smovl ;" |
| "3: nop " |
| : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) |
| : "0" (from), "1" (to), "2" (count), "3" (temp) |
| : "memory", "cc"); |
| #endif // AMD64 |
| } |
| |
| static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| switch (count) { |
| case 8: to[7] = from[7]; |
| case 7: to[6] = from[6]; |
| case 6: to[5] = from[5]; |
| case 5: to[4] = from[4]; |
| case 4: to[3] = from[3]; |
| case 3: to[2] = from[2]; |
| case 2: to[1] = from[1]; |
| case 1: to[0] = from[0]; |
| case 0: break; |
| default: |
| while (count-- > 0) { |
| *to++ = *from++; |
| } |
| break; |
| } |
| #else |
| // pd_disjoint_words is word-atomic in this implementation. |
| pd_disjoint_words(from, to, count); |
| #endif // AMD64 |
| } |
| |
| static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
| pd_conjoint_words(from, to, count); |
| } |
| |
| static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
| pd_disjoint_words(from, to, count); |
| } |
| |
| static void pd_conjoint_bytes(void* from, void* to, size_t count) { |
| #ifdef AMD64 |
| (void)memmove(to, from, count); |
| #else |
| // Includes a zero-count check. |
| intx temp = 0; |
| __asm__ volatile(" testl %6,%6 ;" |
| " jz 13f ;" |
| " cmpl %4,%5 ;" |
| " leal -1(%4,%6),%3 ;" |
| " jbe 1f ;" |
| " cmpl %7,%5 ;" |
| " jbe 8f ;" |
| "1: cmpl $3,%6 ;" |
| " jbe 6f ;" |
| " movl %6,%3 ;" |
| " movl $4,%2 ;" |
| " subl %4,%2 ;" |
| " andl $3,%2 ;" |
| " jz 2f ;" |
| " subl %6,%3 ;" |
| " rep; smovb ;" |
| "2: movl %7,%2 ;" |
| " shrl $2,%2 ;" |
| " jz 5f ;" |
| " cmpl $32,%2 ;" |
| " ja 4f ;" |
| " subl %4,%1 ;" |
| "3: movl (%4),%%edx ;" |
| " movl %%edx,(%5,%4,1);" |
| " addl $4,%0 ;" |
| " subl $1,%2 ;" |
| " jnz 3b ;" |
| " addl %4,%1 ;" |
| " jmp 5f ;" |
| "4: rep; smovl ;" |
| "5: movl %7,%2 ;" |
| " andl $3,%2 ;" |
| " jz 13f ;" |
| "6: xorl %7,%3 ;" |
| "7: movb (%4,%7,1),%%dl ;" |
| " movb %%dl,(%5,%7,1) ;" |
| " addl $1,%3 ;" |
| " subl $1,%2 ;" |
| " jnz 7b ;" |
| " jmp 13f ;" |
| "8: std ;" |
| " cmpl $12,%2 ;" |
| " ja 9f ;" |
| " movl %7,%0 ;" |
| " leal -1(%6,%5),%1 ;" |
| " jmp 11f ;" |
| "9: xchgl %3,%2 ;" |
| " movl %6,%0 ;" |
| " addl $1,%2 ;" |
| " leal -1(%7,%5),%1 ;" |
| " andl $3,%2 ;" |
| " jz 10f ;" |
| " subl %6,%3 ;" |
| " rep; smovb ;" |
| "10: movl %7,%2 ;" |
| " subl $3,%0 ;" |
| " shrl $2,%2 ;" |
| " subl $3,%1 ;" |
| " rep; smovl ;" |
| " andl $3,%3 ;" |
| " jz 12f ;" |
| " movl %7,%2 ;" |
| " addl $3,%0 ;" |
| " addl $3,%1 ;" |
| "11: rep; smovb ;" |
| "12: cld ;" |
| "13: nop ;" |
| : "=S" (from), "=D" (to), "=c" (count), "=r" (temp) |
| : "0" (from), "1" (to), "2" (count), "3" (temp) |
| : "memory", "flags", "%edx"); |
| #endif // AMD64 |
| } |
| |
| static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) { |
| pd_conjoint_bytes(from, to, count); |
| } |
| |
| static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { |
| _Copy_conjoint_jshorts_atomic(from, to, count); |
| } |
| |
| static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) { |
| #ifdef AMD64 |
| _Copy_conjoint_jints_atomic(from, to, count); |
| #else |
| assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size"); |
| // pd_conjoint_words is word-atomic in this implementation. |
| pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count); |
| #endif // AMD64 |
| } |
| |
| static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { |
| #ifdef AMD64 |
| _Copy_conjoint_jlongs_atomic(from, to, count); |
| #else |
| // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't. |
| if (from > to) { |
| while (count-- > 0) { |
| __asm__ volatile("fildll (%0); fistpll (%1)" |
| : |
| : "r" (from), "r" (to) |
| : "memory" ); |
| ++from; |
| ++to; |
| } |
| } else { |
| while (count-- > 0) { |
| __asm__ volatile("fildll (%0,%2,8); fistpll (%1,%2,8)" |
| : |
| : "r" (from), "r" (to), "r" (count) |
| : "memory" ); |
| } |
| } |
| #endif // AMD64 |
| } |
| |
| static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) { |
| #ifdef AMD64 |
| assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); |
| _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); |
| #else |
| assert(HeapWordSize == BytesPerOop, "heapwords and oops must be the same size"); |
| // pd_conjoint_words is word-atomic in this implementation. |
| pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count); |
| #endif // AMD64 |
| } |
| |
| static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) { |
| _Copy_arrayof_conjoint_bytes(from, to, count); |
| } |
| |
| static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) { |
| _Copy_arrayof_conjoint_jshorts(from, to, count); |
| } |
| |
| static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| _Copy_arrayof_conjoint_jints(from, to, count); |
| #else |
| pd_conjoint_jints_atomic((jint*)from, (jint*)to, count); |
| #endif // AMD64 |
| } |
| |
| static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| _Copy_arrayof_conjoint_jlongs(from, to, count); |
| #else |
| pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); |
| #endif // AMD64 |
| } |
| |
| static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) { |
| #ifdef AMD64 |
| assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); |
| _Copy_arrayof_conjoint_jlongs(from, to, count); |
| #else |
| pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); |
| #endif // AMD64 |
| } |
| |
| #endif // OS_CPU_LINUX_X86_VM_COPY_LINUX_X86_INLINE_HPP |
