mirror of git://sourceware.org/git/glibc.git
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#include <stdlib.h>
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#include <soft-fp.h>
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#include <quad.h>
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/* Helpers for the Ots functions which receive long double arguments
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in two integer registers, and return values in $16+$17. */
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#define AXP_UNPACK_RAW_Q(X, val) \
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do { \
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union _FP_UNION_Q _flo; \
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_flo.longs.a = val##l; \
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_flo.longs.b = val##h; \
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FP_UNPACK_RAW_QP(X, &_flo); \
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} while (0)
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#define AXP_UNPACK_SEMIRAW_Q(X, val) \
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do { \
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union _FP_UNION_Q _flo; \
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_flo.longs.a = val##l; \
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_flo.longs.b = val##h; \
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FP_UNPACK_SEMIRAW_QP(X, &_flo); \
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} while (0)
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#define AXP_UNPACK_Q(X, val) \
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do { \
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AXP_UNPACK_RAW_Q(X, val); \
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_FP_UNPACK_CANONICAL(Q, 2, X); \
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} while (0)
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#define AXP_PACK_RAW_Q(val, X) FP_PACK_RAW_QP(&val##_flo, X)
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#define AXP_PACK_SEMIRAW_Q(val, X) \
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do { \
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_FP_PACK_SEMIRAW(Q, 2, X); \
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AXP_PACK_RAW_Q(val, X); \
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} while (0)
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#define AXP_PACK_Q(val, X) \
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do { \
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_FP_PACK_CANONICAL(Q, 2, X); \
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AXP_PACK_RAW_Q(val, X); \
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} while (0)
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#define AXP_DECL_RETURN_Q(X) union _FP_UNION_Q X##_flo
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/* ??? We don't have a real way to tell the compiler that we're wanting
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to return values in $16+$17. Instead use a volatile asm to make sure
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that the values are live, and just hope that nothing kills the values
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in between here and the end of the function. */
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#define AXP_RETURN_Q(X) \
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do { \
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register long r16 __asm__("16") = X##_flo.longs.a; \
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register long r17 __asm__("17") = X##_flo.longs.b; \
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asm volatile ("" : : "r"(r16), "r"(r17)); \
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} while (0)
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