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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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#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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#undef _FP_UNPACK_RAW_2
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#define _FP_UNPACK_RAW_2(fs, X, val) \
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do { \
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union _FP_UNION_##fs _flo; \
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_flo.longs.a = val##l; \
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_flo.longs.b = val##h; \
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X##_f0 = _flo.bits.frac0; \
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X##_f1 = _flo.bits.frac1; \
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X##_e = _flo.bits.exp; \
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X##_s = _flo.bits.sign; \
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} while (0)
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#undef _FP_PACK_RAW_2
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#define _FP_PACK_RAW_2(fs, val, X) \
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do { \
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union _FP_UNION_##fs _flo; \
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_flo.bits.frac0 = X##_f0; \
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_flo.bits.frac1 = X##_f1; \
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_flo.bits.exp = X##_e; \
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_flo.bits.sign = X##_s; \
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val##l = _flo.longs.a; \
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val##h = _flo.longs.b; \
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} while (0)
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#define FP_DECL_RETURN(X) \
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long X##l, X##h
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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 FP_RETURN(X) \
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do { \
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register long r16 __asm__("16") = X##l; \
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register long r17 __asm__("17") = X##h; \
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asm volatile ("" : : "r"(r16), "r"(r17)); \
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} while (0)
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