78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
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/* $NetBSD: abi.h,v 1.5 2008/06/23 10:24:13 drochner Exp $ */
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/*
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* Written by Frank van der Linden (fvdl@wasabisystems.com)
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*/
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/*
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* The x86-64 ABI specifies that float, double and long double
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* arguments are passed in SSE2 (xmm) registers. Unfortunately,
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* there is no way to push those on to the FP stack, which is
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* where the fancier instructions get their arguments from.
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*
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* Define some prologues and epilogues to store and retrieve
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* xmm regs to local variables.
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*/
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#ifdef __x86_64__
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#define ARG_DOUBLE_ONE -8(%rsp)
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#define ARG_DOUBLE_ONE_LSW -8(%rsp)
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#define ARG_DOUBLE_ONE_MSW -4(%rsp)
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#define ARG_DOUBLE_TWO -16(%rsp)
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#define ARG_FLOAT_ONE -4(%rsp)
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#define ARG_FLOAT_TWO -8(%rsp)
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#define XMM_ONE_ARG_DOUBLE_PROLOGUE \
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movsd %xmm0, ARG_DOUBLE_ONE
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#define XMM_TWO_ARG_DOUBLE_PROLOGUE \
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movsd %xmm0, ARG_DOUBLE_ONE ; \
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movsd %xmm1, ARG_DOUBLE_TWO
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#define XMM_ONE_ARG_FLOAT_PROLOGUE \
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movss %xmm0, ARG_FLOAT_ONE
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#define XMM_TWO_ARG_FLOAT_PROLOGUE \
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movss %xmm0, ARG_FLOAT_ONE ; \
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movss %xmm1, ARG_FLOAT_TWO
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#define XMM_DOUBLE_EPILOGUE \
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fstpl ARG_DOUBLE_ONE ; \
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movsd ARG_DOUBLE_ONE, %xmm0
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#define XMM_FLOAT_EPILOGUE \
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fstps ARG_FLOAT_ONE ; \
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movss ARG_FLOAT_ONE, %xmm0
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#define FLDL_VAR(x) fldl x(%rip)
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#else
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#define ARG_DOUBLE_ONE 4(%esp)
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#define ARG_DOUBLE_ONE_LSW 4(%esp)
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#define ARG_DOUBLE_ONE_MSW 8(%esp)
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#define ARG_DOUBLE_TWO 12(%esp)
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#define ARG_FLOAT_ONE 4(%esp)
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#define ARG_FLOAT_TWO 8(%esp)
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#define XMM_ONE_ARG_DOUBLE_PROLOGUE
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#define XMM_TWO_ARG_DOUBLE_PROLOGUE
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#define XMM_ONE_ARG_FLOAT_PROLOGUE
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#define XMM_TWO_ARG_FLOAT_PROLOGUE
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#define XMM_DOUBLE_EPILOGUE
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#define XMM_FLOAT_EPILOGUE
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#ifdef PIC
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#define FLDL_VAR(x) \
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PIC_PROLOGUE ; \
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fldl PIC_GOTOFF(x) ; \
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PIC_EPILOGUE
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#else
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#define FLDL_VAR(x) \
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fldl x
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#endif
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#endif
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