From a14b9578ee5297d954103e05d7b2d322816ddd8f Mon Sep 17 00:00:00 2001 From: Xavier Leroy Date: Sat, 1 Oct 2016 17:38:24 +0200 Subject: Support for 64-bit architectures: x86 in 64-bit mode This commit enriches the IA32 port so that it supports x86 processors in 64-bit mode as well as in 32-bit mode, depending on the value of Archi.ptr64, which itself is set from the configuration model. To activate x86-64 bit support, configure with "x86_64-linux". Main steps: - Enrich Op.v and Asm.v with 64-bit operations - SelectLong: in 64-bit mode, use 64-bit operations directly; in 32-bit mode, fall back on the old implementation based on pairs of 32-bit integers - Conventions1: support x86-64 ABI in addition to the 32-bit ABI. - Add support for the new 64-bit operations everywhere. - runtime/x86_64: implementation of the supporting library appropriate for x86 in 64-bit mode To do: - More optimizations are possible on 64-bit integer arithmetic operations. - Could add new chunks to load, say, an unsigned byte into a 64-bit long (currently we load as a 32-bit int then zero-extend). - Implements the wrong ABI for struct passing. --- runtime/x86_64/i64_dtou.S | 56 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 runtime/x86_64/i64_dtou.S (limited to 'runtime/x86_64/i64_dtou.S') diff --git a/runtime/x86_64/i64_dtou.S b/runtime/x86_64/i64_dtou.S new file mode 100644 index 00000000..e455ea6f --- /dev/null +++ b/runtime/x86_64/i64_dtou.S @@ -0,0 +1,56 @@ +// ***************************************************************** +// +// The Compcert verified compiler +// +// Xavier Leroy, INRIA Paris +// +// Copyright (c) 2016 Institut National de Recherche en Informatique et +// en Automatique. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are met: +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * 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. +// * Neither the name of the nor the +// names of its contributors may be used to endorse or promote products +// derived from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "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 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. +// +// ********************************************************************* + +// Helper functions for 64-bit integer arithmetic. x86_64 version. + +#include "sysdeps.h" + +// Conversion float -> unsigned long + +FUNCTION(__i64_dtou) + ucomisd .LC1(%rip), %xmm0 + jnb 1f + cvttsd2siq %xmm0, %rax + ret +1: subsd .LC1(%rip), %xmm0 + cvttsd2siq %xmm0, %rax + addq .LC2(%rip), %rax + ret + + .p2align 3 +.LC1: .quad 0x43e0000000000000 // 2^63 in double precision +.LC2: .quad 0x8000000000000000 // 2^63 as an integer + +ENDFUNCTION(__i64_dtou) + -- cgit