125 lines
5.1 KiB
Diff
125 lines
5.1 KiB
Diff
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2007-04-20 Luis Machado <luisgpm@br.ibm.com>
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* rs6000-tdep.c (rs6000_gdbarch_init): Set the long double format for
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powerpc64.
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* configure.host : Set the host long double format for powerpc64 to be
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a 128-bit type defined in libiberty/floatformat.c.
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* ppc-linux-tdep.c (ppc_linux_init_abi): Remove code that sets long double
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size to 8 bytes. This breaks expression evaluation by overriding the
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default.
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* floatformat.c : Introduce default floatformat structs to describe the
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128-bit long double found on the powerpc64. Description does not fully
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describe this format which is actually a pair of 64-bit doubles. However
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we are relying on floatformat_to_doublest() recognizing that this is
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also the default host floatformat.
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* floatformat.h : Default floatformat structs for powerpc64 128-bit
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long doubles.
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Index: ./gdb/configure.host
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===================================================================
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--- ./gdb/configure.host.orig 2007-04-21 23:51:06.000000000 -0300
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+++ ./gdb/configure.host 2007-04-21 23:51:09.000000000 -0300
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@@ -179,6 +179,11 @@
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gdb_host_double_format="&floatformat_ieee_double_big"
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gdb_host_long_double_format="&floatformat_m68881_ext"
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;;
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+powerpc64-*-*)
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+ gdb_host_float_format=0
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+ gdb_host_double_format=0
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+ gdb_host_long_double_format="&floatformat_ppc64_long_double_big"
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+ ;;
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*)
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gdb_host_float_format=0
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gdb_host_double_format=0
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Index: ./gdb/rs6000-tdep.c
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===================================================================
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--- ./gdb/rs6000-tdep.c.orig 2007-04-21 23:51:06.000000000 -0300
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+++ ./gdb/rs6000-tdep.c 2007-04-21 23:51:09.000000000 -0300
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@@ -3442,7 +3442,19 @@
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set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
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set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
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if (sysv_abi)
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- set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
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+ {
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+ int byte_order = gdbarch_byte_order (gdbarch);
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+
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+ if (byte_order == BFD_ENDIAN_BIG)
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+ set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_big);
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+ else if (byte_order == BFD_ENDIAN_LITTLE)
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+ set_gdbarch_long_double_format (gdbarch, &floatformat_ppc64_long_double_little);
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+ else
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+ internal_error (__FILE__, __LINE__,
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+ _("rs6000_gdbarch_init: "
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+ "bad byte order"));
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+ set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT);
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+ }
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else
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set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
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set_gdbarch_char_signed (gdbarch, 0);
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Index: ./include/floatformat.h
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===================================================================
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--- ./include/floatformat.h.orig 2007-04-21 23:51:06.000000000 -0300
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+++ ./include/floatformat.h 2007-04-21 23:51:09.000000000 -0300
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@@ -118,6 +118,9 @@
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extern const struct floatformat floatformat_ia64_spill_little;
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extern const struct floatformat floatformat_ia64_quad_big;
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extern const struct floatformat floatformat_ia64_quad_little;
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+/* ppc64 long double implemented as 2 doubles */
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+extern const struct floatformat floatformat_ppc64_long_double_big;
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+extern const struct floatformat floatformat_ppc64_long_double_little;
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/* Convert from FMT to a double.
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FROM is the address of the extended float.
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Index: ./libiberty/floatformat.c
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===================================================================
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--- ./libiberty/floatformat.c.orig 2007-04-21 23:51:06.000000000 -0300
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+++ ./libiberty/floatformat.c 2007-04-21 23:51:09.000000000 -0300
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@@ -106,6 +106,25 @@
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floatformat_always_valid
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};
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+/* floatformats for ppc64 long double, big and little endian. */
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+/* The layout is a pair of doubles. Don't use this description to pass */
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+/* information to get_field(). The bit size is the important thing. */
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+const struct floatformat floatformat_ppc64_long_double_big =
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+{
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+ floatformat_big, 128, 0, 1, 11, 1023, 2047, 12, 52,
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+ floatformat_intbit_no,
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+ "floatformat_ppc64_long_double_big",
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+ floatformat_always_valid
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+};
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+
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+const struct floatformat floatformat_ppc64_long_double_little =
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+{
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+ floatformat_little, 128, 0, 1, 11, 1023, 2047, 12, 52,
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+ floatformat_intbit_no,
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+ "floatformat_ppc64_long_double_little",
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+ floatformat_always_valid
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+};
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+
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/* floatformat for IEEE double, little endian byte order, with big endian word
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ordering, as on the ARM. */
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Index: ./gdb/ppc-linux-tdep.c
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===================================================================
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--- ./gdb/ppc-linux-tdep.c.orig 2007-04-21 19:48:50.000000000 -0300
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+++ ./gdb/ppc-linux-tdep.c 2007-04-22 00:29:50.000000000 -0300
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@@ -1059,7 +1059,8 @@
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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- /* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
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+#if 0
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+ /* NOTE: jimb/2004-03-26: The System V ABI PowerPC Processor
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Supplement says that long doubles are sixteen bytes long.
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However, as one of the known warts of its ABI, PPC GNU/Linux uses
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eight-byte long doubles. GCC only recently got 128-bit long
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@@ -1068,6 +1069,7 @@
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double' on PPC GNU/Linux are non-conformant. */
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/* NOTE: cagney/2005-01-25: True for both 32- and 64-bit. */
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set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
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+#endif
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if (tdep->wordsize == 4)
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{
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