/* $NetBSD: abi.h,v 1.8 2013/09/12 15:36:16 joerg Exp $ */ /* * Written by Frank van der Linden (fvdl@wasabisystems.com) */ /* * The x86-64 ABI specifies that float and double arguments * are passed in SSE2 (xmm) registers. Unfortunately, * there is no way to push those on to the FP stack, which is * where the fancier instructions get their arguments from. * * Define some prologues and epilogues to store and retrieve * xmm regs to local variables. */ #ifdef __x86_64__ #define ARG_LONG_DOUBLE_ONE 8(%rsp) #define ARG_LONG_DOUBLE_TWO 24(%rsp) #define ARG_DOUBLE_ONE -8(%rsp) #define ARG_DOUBLE_ONE_LSW -8(%rsp) #define ARG_DOUBLE_ONE_MSW -4(%rsp) #define ARG_DOUBLE_TWO -16(%rsp) #define ARG_FLOAT_ONE -4(%rsp) #define ARG_FLOAT_TWO -8(%rsp) #define XMM_ONE_ARG_DOUBLE_PROLOGUE \ movsd %xmm0, ARG_DOUBLE_ONE #define XMM_TWO_ARG_DOUBLE_PROLOGUE \ movsd %xmm0, ARG_DOUBLE_ONE ; \ movsd %xmm1, ARG_DOUBLE_TWO #define XMM_ONE_ARG_FLOAT_PROLOGUE \ movss %xmm0, ARG_FLOAT_ONE #define XMM_TWO_ARG_FLOAT_PROLOGUE \ movss %xmm0, ARG_FLOAT_ONE ; \ movss %xmm1, ARG_FLOAT_TWO #define XMM_DOUBLE_EPILOGUE \ fstpl ARG_DOUBLE_ONE ; \ movsd ARG_DOUBLE_ONE, %xmm0 #define XMM_FLOAT_EPILOGUE \ fstps ARG_FLOAT_ONE ; \ movss ARG_FLOAT_ONE, %xmm0 #define FLDL_VAR(x) fldl x(%rip) #else #define ARG_LONG_DOUBLE_ONE 4(%esp) #define ARG_LONG_DOUBLE_TWO 16(%esp) #define ARG_DOUBLE_ONE 4(%esp) #define ARG_DOUBLE_ONE_LSW 4(%esp) #define ARG_DOUBLE_ONE_MSW 8(%esp) #define ARG_DOUBLE_TWO 12(%esp) #define ARG_FLOAT_ONE 4(%esp) #define ARG_FLOAT_TWO 8(%esp) #define XMM_ONE_ARG_DOUBLE_PROLOGUE #define XMM_TWO_ARG_DOUBLE_PROLOGUE #define XMM_ONE_ARG_FLOAT_PROLOGUE #define XMM_TWO_ARG_FLOAT_PROLOGUE #define XMM_DOUBLE_EPILOGUE #define XMM_FLOAT_EPILOGUE #ifdef __PIC__ #define FLDL_VAR(x) \ PIC_PROLOGUE ; \ fldl PIC_GOTOFF(x) ; \ PIC_EPILOGUE #else #define FLDL_VAR(x) \ fldl x #endif #endif |