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| author | Doug Evans <dje@gnu.org> | 1994-08-04 01:34:34 +0000 |
|---|---|---|
| committer | Doug Evans <dje@gnu.org> | 1994-08-04 01:34:34 +0000 |
| commit | a7acd9111dd5b8fe5a86850a89906f862b3dd41c (patch) | |
| tree | 42f7323335b02e61236ec08f2145845f6be111e3 /gcc | |
| parent | 29421402b7e58876daa370f41f8162ea80dbee5b (diff) | |
| download | gcc-a7acd9111dd5b8fe5a86850a89906f862b3dd41c.zip gcc-a7acd9111dd5b8fe5a86850a89906f862b3dd41c.tar.gz gcc-a7acd9111dd5b8fe5a86850a89906f862b3dd41c.tar.bz2 | |
(v9 sparc_builtin_saveregs): Save quadword fp regs on 16 byte boundaries.
(v9 sparc_builtin_saveregs): Save quadword fp regs on
16 byte boundaries. Handle non-zero number of named fp args.
From-SVN: r7855
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/sparc/sparc.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index 915d2ed..e80c280 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -3086,27 +3086,36 @@ sparc_builtin_saveregs (arglist) { tree fntype = TREE_TYPE (current_function_decl); /* First unnamed integer register. */ - int first_intreg = current_function_args_info.arg_count[0]; + int first_intreg = current_function_args_info.arg_count[(int) SPARC_ARG_INT]; /* Number of integer registers we need to save. */ int n_intregs = MAX (0, NPARM_REGS (SImode) - first_intreg); /* First unnamed SFmode float reg (no, you can't pass SFmode floats as - unnamed arguments, we just number them that way). */ - int first_floatreg = current_function_args_info.arg_count[1] + 1 & ~1; + unnamed arguments, we just number them that way). We must round up to + the next double word float reg - that is the first one to save. */ + int first_floatreg = current_function_args_info.arg_count[(int) SPARC_ARG_FLOAT] + 1 & ~1; /* Number of SFmode float regs to save. */ int n_floatregs = MAX (0, NPARM_REGS (SFmode) - first_floatreg); int ptrsize = GET_MODE_SIZE (Pmode); rtx valist, regbuf, fpregs; - int regno; + int bufsize, adjust, regno; /* Allocate block of memory for the regs. - We only allocate as much as we need. */ + We only allocate as much as we need, but we must ensure quadword float + regs are stored with the appropriate alignment. */ /* ??? If n_intregs + n_floatregs == 0, should we allocate at least 1 byte? Or can assign_stack_local accept a 0 SIZE argument? */ - regbuf = assign_stack_local (BLKmode, - (n_intregs * UNITS_PER_WORD - + n_floatregs * FLOAT_TYPE_SIZE/BITS_PER_UNIT), - BITS_PER_WORD); + bufsize = (n_intregs * UNITS_PER_WORD) + (n_floatregs * (UNITS_PER_WORD / 2)); + /* Add space in front of the int regs to ensure proper alignment of quadword + fp regs. We must add the space in front because va_start assumes this. */ + if (n_floatregs >= 4) + adjust = ((n_intregs + first_floatreg / 2) % 2) * UNITS_PER_WORD; + else + adjust = 0; + + regbuf = assign_stack_local (BLKmode, bufsize + adjust, + GET_MODE_BITSIZE (TFmode)); + regbuf = gen_rtx (MEM, BLKmode, plus_constant (XEXP (regbuf, 0), adjust)); MEM_IN_STRUCT_P (regbuf) = 1; /* Save int args. @@ -3130,9 +3139,10 @@ sparc_builtin_saveregs (arglist) for (regno = first_floatreg; regno < NPARM_REGS (SFmode); regno += 2) emit_move_insn (gen_rtx (MEM, DFmode, plus_constant (fpregs, - GET_MODE_SIZE (SFmode) * regno)), - gen_rtx (REG, DFmode, BASE_INCOMING_ARG_REG (DFmode) - + regno)); + GET_MODE_SIZE (SFmode) + * (regno - first_floatreg))), + gen_rtx (REG, DFmode, + BASE_INCOMING_ARG_REG (DFmode) + regno)); /* Return the address of the regbuf. */ |