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| author | Jeff Law <law@gcc.gnu.org> | 1993-01-06 16:11:59 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1993-01-06 16:11:59 -0700 |
| commit | 8c0a7019c9734ef79c02251923102a611414e44f (patch) | |
| tree | f9423d16fe914cafd18431bbf7c4bace403b6653 /gcc | |
| parent | 5ce4a0584fe88afeb9d643ead1c4962aa8ae3fa4 (diff) | |
| download | gcc-8c0a7019c9734ef79c02251923102a611414e44f.zip gcc-8c0a7019c9734ef79c02251923102a611414e44f.tar.gz gcc-8c0a7019c9734ef79c02251923102a611414e44f.tar.bz2 | |
pa.h (target_switches): Add "-mdisable-fpregs" and "-mdisable-indexing.
* pa.h (target_switches): Add "-mdisable-fpregs" and
"-mdisable-indexing.
(CONDITIONAL_REGISTER_USAGE): If TARGET_DISABLE_FPREGS, then mark
all FP registers as fixed.
From-SVN: r3131
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/pa/pa.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h index 5ee017c..147b45b 100644 --- a/gcc/config/pa/pa.h +++ b/gcc/config/pa/pa.h @@ -40,6 +40,13 @@ extern int target_flags; #define TARGET_SNAKE (target_flags & 1) +/* Disable all FP registers (they all become fixed). This may be necessary + for compiling kernels which perform lazy context switching of FP regs. + Note if you use this option and try to perform floating point operations + the compiler will abort! */ + +#define TARGET_DISABLE_FPREGS (target_flags & 2) + /* Force gcc to only use instructions which are safe when compiling kernels. Specifically, avoid using add instructions with dp (r27) as an argument. Use addil instructions instead. Doing so avoids a nasty bug in the @@ -60,6 +67,13 @@ extern int target_flags; #define TARGET_LONG_CALLS (target_flags & 16) +/* Disable indexed addressing modes. Necessary under MACH. + + ??? Some problem with a high bit being set in an address having + special meaning to the PA MACH ports. */ + +#define TARGET_DISABLE_INDEXING (target_flags & 32) + /* Macro to define tables used to set the flags. This is a list in braces of pairs in braces, each pair being { "NAME", VALUE } @@ -71,10 +85,12 @@ extern int target_flags; {"nosnake", -1}, \ {"pa-risc-1-0", -1}, \ {"pa-risc-1-1", 1}, \ + {"disable-fpregs", 2},\ {"kernel", 4}, \ {"shared-libs", 8}, \ {"no-shared-libs", -8},\ {"long-calls", 16}, \ + {"disable-indexing", 32},\ { "", TARGET_DEFAULT}} #ifndef TARGET_DEFAULT @@ -326,6 +342,17 @@ extern int target_flags; if (TEST_HARD_REG_BIT (x, i)) \ fixed_regs[i] = call_used_regs[i] = 1; \ } \ + else if (TARGET_DISABLE_FPREGS) \ + { \ + COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]);\ + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \ + if (TEST_HARD_REG_BIT (x, i)) \ + fixed_regs[i] = call_used_regs[i] = 1; \ + COPY_HARD_REG_SET (x, reg_class_contents[(int)SNAKE_FP_REGS]);\ + for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \ + if (TEST_HARD_REG_BIT (x, i)) \ + fixed_regs[i] = call_used_regs[i] = 1; \ + } \ else \ { \ COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \ |