1/* $NetBSD: abi.h,v 1.7 2011/06/18 22:19:52 joerg Exp $ */ 2 3/* 4 * Written by Frank van der Linden (fvdl@wasabisystems.com) 5 */ 6 7/* 8 * The x86-64 ABI specifies that float and double arguments 9 * are passed in SSE2 (xmm) registers. Unfortunately, 10 * there is no way to push those on to the FP stack, which is 11 * where the fancier instructions get their arguments from. 12 * 13 * Define some prologues and epilogues to store and retrieve 14 * xmm regs to local variables. 15 */ 16 17#ifdef __x86_64__ 18 19#define ARG_LONG_DOUBLE_ONE 8(%rsp) 20#define ARG_LONG_DOUBLE_TWO 24(%rsp) 21#define ARG_DOUBLE_ONE -8(%rsp) 22#define ARG_DOUBLE_ONE_LSW -8(%rsp) 23#define ARG_DOUBLE_ONE_MSW -4(%rsp) 24#define ARG_DOUBLE_TWO -16(%rsp) 25#define ARG_FLOAT_ONE -4(%rsp) 26#define ARG_FLOAT_TWO -8(%rsp) 27 28#define XMM_ONE_ARG_DOUBLE_PROLOGUE \ 29 movsd %xmm0, ARG_DOUBLE_ONE 30 31#define XMM_TWO_ARG_DOUBLE_PROLOGUE \ 32 movsd %xmm0, ARG_DOUBLE_ONE ; \ 33 movsd %xmm1, ARG_DOUBLE_TWO 34 35#define XMM_ONE_ARG_FLOAT_PROLOGUE \ 36 movss %xmm0, ARG_FLOAT_ONE 37 38#define XMM_TWO_ARG_FLOAT_PROLOGUE \ 39 movss %xmm0, ARG_FLOAT_ONE ; \ 40 movss %xmm1, ARG_FLOAT_TWO 41 42#define XMM_DOUBLE_EPILOGUE \ 43 fstpl ARG_DOUBLE_ONE ; \ 44 movsd ARG_DOUBLE_ONE, %xmm0 45 46#define XMM_FLOAT_EPILOGUE \ 47 fstps ARG_FLOAT_ONE ; \ 48 movss ARG_FLOAT_ONE, %xmm0 49 50#define FLDL_VAR(x) fldl x(%rip) 51 52#else 53 54#define ARG_LONG_DOUBLE_ONE 4(%esp) 55#define ARG_LONG_DOUBLE_TWO 16(%esp) 56#define ARG_DOUBLE_ONE 4(%esp) 57#define ARG_DOUBLE_ONE_LSW 4(%esp) 58#define ARG_DOUBLE_ONE_MSW 8(%esp) 59#define ARG_DOUBLE_TWO 12(%esp) 60#define ARG_FLOAT_ONE 4(%esp) 61#define ARG_FLOAT_TWO 8(%esp) 62 63#define XMM_ONE_ARG_DOUBLE_PROLOGUE 64#define XMM_TWO_ARG_DOUBLE_PROLOGUE 65#define XMM_ONE_ARG_FLOAT_PROLOGUE 66#define XMM_TWO_ARG_FLOAT_PROLOGUE 67 68#define XMM_DOUBLE_EPILOGUE 69#define XMM_FLOAT_EPILOGUE 70 71#ifdef __PIC__ 72#define FLDL_VAR(x) \ 73 PIC_PROLOGUE ; \ 74 fldl PIC_GOTOFF(x) ; \ 75 PIC_EPILOGUE 76#else 77#define FLDL_VAR(x) \ 78 fldl x 79 80#endif 81#endif 82