diff options
| -rw-r--r-- | gdb/ChangeLog | 9 | ||||
| -rw-r--r-- | gdb/mips-tdep.c | 33 |
2 files changed, 42 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b3adc5e..62a5b48 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,12 @@ +2004-08-08 Joel Brobecker <brobecker@gnat.com> + + * mips-tdep.c: Include "floatformat.h". + (n32n64_floatformat_always_valid): New function. + (floatformat_n32n64_long_double_big): New constant. + (mips_gdbarch_init): Set size and format of long double + for N32 and N64 ABIs. + * Makefile.in (mips-tdep.o): Update dependencies. + 2004-08-08 Andrew Cagney <cagney@gnu.org> * gdbarch.sh: Delete "fmt" and "attrib" fields. Always use %s to diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c index f6c568a..e02202c 100644 --- a/gdb/mips-tdep.c +++ b/gdb/mips-tdep.c @@ -54,6 +54,7 @@ #include "frame-base.h" #include "trad-frame.h" #include "infcall.h" +#include "floatformat.h" static const struct objfile_data *mips_pdr_data; @@ -149,6 +150,32 @@ struct gdbarch_tdep const char **mips_processor_reg_names; }; +static int +n32n64_floatformat_always_valid (const struct floatformat *fmt, + const char *from) +{ + return 1; +} + +/* FIXME: brobecker/2004-08-08: Long Double values are 128 bit long. + They are implemented as a pair of 64bit doubles where the high + part holds the result of the operation rounded to double, and + the low double holds the difference between the exact result and + the rounded result. So "high" + "low" contains the result with + added precision. Unfortunately, the floatformat structure used + by GDB is not powerful enough to describe this format. As a temporary + measure, we define a 128bit floatformat that only uses the high part. + We lose a bit of precision but that's probably the best we can do + for now with the current infrastructure. */ + +static const struct floatformat floatformat_n32n64_long_double_big = +{ + floatformat_big, 128, 0, 1, 11, 1023, 2047, 12, 52, + floatformat_intbit_no, + "floatformat_ieee_double_big", + n32n64_floatformat_always_valid +}; + const struct mips_regnum * mips_regnum (struct gdbarch *gdbarch) { @@ -6323,6 +6350,9 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_long_bit (gdbarch, 32); set_gdbarch_ptr_bit (gdbarch, 32); set_gdbarch_long_long_bit (gdbarch, 64); + set_gdbarch_long_double_bit (gdbarch, 128); + set_gdbarch_long_double_format (gdbarch, + &floatformat_n32n64_long_double_big); break; case MIPS_ABI_N64: set_gdbarch_push_dummy_call (gdbarch, mips_n32n64_push_dummy_call); @@ -6333,6 +6363,9 @@ mips_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_long_bit (gdbarch, 64); set_gdbarch_ptr_bit (gdbarch, 64); set_gdbarch_long_long_bit (gdbarch, 64); + set_gdbarch_long_double_bit (gdbarch, 128); + set_gdbarch_long_double_format (gdbarch, + &floatformat_n32n64_long_double_big); break; default: internal_error (__FILE__, __LINE__, "unknown ABI in switch"); |