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libgccjit: Fix float playback for cross-compilation

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gcc/jit/ChangeLog:
	PR jit/113343
	* jit-playback.cc (new_rvalue_from_const): Fix to have the
	correct value when cross-compiling.
This commit is contained in:
Antoni Boucher 2023-10-21 11:20:46 -04:00
parent 30c2678cc6
commit fa720364e4
1 changed files with 8 additions and 13 deletions
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21
gcc/jit/jit-playback.cc
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@ -43,6 +43,7 @@ along with GCC; see the file COPYING3. If not see
#include "gcc.h"
#include "diagnostic.h"
#include "stmt.h"
#include "realmpfr.h"
#include "jit-playback.h"
#include "jit-result.h"
@ -1078,22 +1079,16 @@ new_rvalue_from_const <double> (type *type,
// FIXME: type-checking, or coercion?
tree inner_type = type->as_tree ();
mpfr_t mpf_value;
mpfr_init2 (mpf_value, 64);
mpfr_set_d (mpf_value, value, MPFR_RNDN);
/* We have a "double", we want a REAL_VALUE_TYPE.
real.cc:real_from_target appears to require the representation to be
split into 32-bit values, and then sent as an pair of host long
ints. */
realmpfr.cc:real_from_mpfr. */
REAL_VALUE_TYPE real_value;
union
{
double as_double;
uint32_t as_uint32s[2];
} u;
u.as_double = value;
long int as_long_ints[2];
as_long_ints[0] = u.as_uint32s[0];
as_long_ints[1] = u.as_uint32s[1];
real_from_target (&real_value, as_long_ints, DFmode);
real_from_mpfr (&real_value, mpf_value, inner_type, MPFR_RNDN);
tree inner = build_real (inner_type, real_value);
return new rvalue (this, inner);
}