Add new command line switch --no-construct-floats
This commit is contained in:
Nick Clifton
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fe794dc69d
commit
119d663aa4
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@ -1,3 +1,17 @@
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2000-07-14 Nick Clifton <nickc@cygnus.com>
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* config/tc-mips.c (mips_disable_float_construction): New
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static variable. Set to true if doubles should not be
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constructed by loading two single width fp registers with
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halves of the value.
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(mips_ip): Test mips_disable_float_construction.
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(md_longopts): Add command line switches --construct-floats
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and --no-construct-floats.
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(md_parse_option): Parse new command line options.
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(md_show_usage): Describe new command line options.
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* doc/c-mips.texi: Document new command line options.
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2000-07-13 Koundinya K <kk@ddeorg.soft.net>
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* configure.in: Remove the test /usr/dde for mips-*-sysv4*MP*
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@ -313,6 +313,14 @@ static int mips_big_got;
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instructions. */
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static int mips_trap;
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/* 1 if double width floating point constants should not be constructed
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by a assembling two single width halves into two single width floating
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point registers which just happen to alias the double width destination
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register. On some architectures this aliasing can be disabled by a bit
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in the status register, and the settin gof this bit cannot be determined
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automatically at assemble time. */
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static int mips_disable_float_construction;
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/* Non-zero if any .set noreorder directives were used. */
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static int mips_any_noreorder;
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@ -7601,6 +7609,7 @@ mips_ip (str, ip)
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imm_expr.X_add_number = bfd_getb32 (temp);
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}
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else if (length > 4
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&& ! mips_disable_float_construction
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&& ((temp[0] == 0 && temp[1] == 0)
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|| (temp[2] == 0 && temp[3] == 0))
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&& ((temp[4] == 0 && temp[5] == 0)
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@ -8826,6 +8835,10 @@ struct option md_longopts[] = {
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{"mcpu", required_argument, NULL, OPTION_MCPU},
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#define OPTION_MEMBEDDED_PIC (OPTION_MD_BASE + 6)
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{"membedded-pic", no_argument, NULL, OPTION_MEMBEDDED_PIC},
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#define OPTION_CALL_SHARED (OPTION_MD_BASE + 7)
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#define OPTION_NON_SHARED (OPTION_MD_BASE + 8)
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#define OPTION_TRAP (OPTION_MD_BASE + 9)
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{"trap", no_argument, NULL, OPTION_TRAP},
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{"no-break", no_argument, NULL, OPTION_TRAP},
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@ -8848,16 +8861,21 @@ struct option md_longopts[] = {
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{"m4100", no_argument, NULL, OPTION_M4100},
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#define OPTION_NO_M4100 (OPTION_MD_BASE + 18)
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{"no-m4100", no_argument, NULL, OPTION_NO_M4100},
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#define OPTION_XGOT (OPTION_MD_BASE + 19)
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#define OPTION_32 (OPTION_MD_BASE + 20)
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#define OPTION_64 (OPTION_MD_BASE + 21)
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#define OPTION_MIPS16 (OPTION_MD_BASE + 22)
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{"mips16", no_argument, NULL, OPTION_MIPS16},
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#define OPTION_NO_MIPS16 (OPTION_MD_BASE + 23)
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{"no-mips16", no_argument, NULL, OPTION_NO_MIPS16},
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#define OPTION_M3900 (OPTION_MD_BASE + 26)
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{"m3900", no_argument, NULL, OPTION_M3900},
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#define OPTION_NO_M3900 (OPTION_MD_BASE + 27)
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{"no-m3900", no_argument, NULL, OPTION_NO_M3900},
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#define OPTION_MABI (OPTION_MD_BASE + 38)
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{"mabi", required_argument, NULL, OPTION_MABI},
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@ -8866,11 +8884,6 @@ struct option md_longopts[] = {
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#define OPTION_NO_M7000_HILO_FIX (OPTION_MD_BASE + 40)
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{"no-fix-7000", no_argument, NULL, OPTION_NO_M7000_HILO_FIX},
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#define OPTION_CALL_SHARED (OPTION_MD_BASE + 7)
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#define OPTION_NON_SHARED (OPTION_MD_BASE + 8)
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#define OPTION_XGOT (OPTION_MD_BASE + 19)
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#define OPTION_32 (OPTION_MD_BASE + 20)
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#define OPTION_64 (OPTION_MD_BASE + 21)
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#ifdef OBJ_ELF
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{"KPIC", no_argument, NULL, OPTION_CALL_SHARED},
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{"xgot", no_argument, NULL, OPTION_XGOT},
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@ -8885,6 +8898,12 @@ struct option md_longopts[] = {
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{"mgp32", no_argument, NULL, OPTION_GP32},
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{"mgp64", no_argument, NULL, OPTION_GP64},
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#define OPTION_CONSTRUCT_FLOATS (OPTION_MD_BASE + 43)
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{"construct-floats", no_argument, NULL, OPTION_CONSTRUCT_FLOATS},
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#define OPTION_NO_CONSTRUCT_FLOATS (OPTION_MD_BASE + 44)
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{"no-construct-floats", no_argument, NULL, OPTION_NO_CONSTRUCT_FLOATS},
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{NULL, no_argument, NULL, 0}
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};
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size_t md_longopts_size = sizeof(md_longopts);
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@ -8896,6 +8915,14 @@ md_parse_option (c, arg)
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{
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switch (c)
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{
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case OPTION_CONSTRUCT_FLOATS:
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mips_disable_float_construction = 0;
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break;
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case OPTION_NO_CONSTRUCT_FLOATS:
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mips_disable_float_construction = 1;
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break;
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case OPTION_TRAP:
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mips_trap = 1;
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break;
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@ -9338,6 +9365,7 @@ MIPS options:\n\
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fprintf(stream, _("\
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-O0 remove unneeded NOPs, do not swap branches\n\
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-O remove unneeded NOPs and swap branches\n\
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--[no-]construct-floats [dis]allow floating point values to be constructed\n\
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--trap, --no-break trap exception on div by 0 and mult overflow\n\
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--break, --no-trap break exception on div by 0 and mult overflow\n"));
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#ifdef OBJ_ELF
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@ -151,6 +151,21 @@ other assemblers, which use it to turn off C style preprocessing. With
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@sc{gnu} @code{@value{AS}}, there is no need for @samp{-nocpp}, because the
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@sc{gnu} assembler itself never runs the C preprocessor.
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@item --construct-floats
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@itemx --no-construct-floats
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@cindex --construct-floats
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@cindex --no-construct-floats
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The @code{--no-construct-floats} option disables the construction of
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double width floating point constants by loading the two halves of the
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value into the two single width floating point registers that make up
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the double width register. This feature is useful if the processor
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support the FR bit in its status register, and this bit is known (by
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the programmer) to be set. This bit prevents the aliasing of the double
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width register by the single width registers.
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By default @code {--construct-floats} is selected, allowing construction
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of these floating point constants.
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@item --trap
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@itemx --no-break
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@c FIXME! (1) reflect these options (next item too) in option summaries;
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