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alpha.h (HARD_REGNO_MODE_OK): Disallow QI/HImode in fp regs.

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* alpha.h (HARD_REGNO_MODE_OK): Disallow QI/HImode in fp regs.
        (MODES_TIEABLE_P): Update.

From-SVN: r25704
This commit is contained in:
Richard Henderson 1999-03-11 06:01:27 -08:00 committed by Richard Henderson
parent 27922c1362
commit a7adf08e84
2 changed files with 12 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Thu Mar 11 14:00:58 1999 Richard Henderson <rth@cygnus.com>
* alpha.h (HARD_REGNO_MODE_OK): Disallow QI/HImode in fp regs.
(MODES_TIEABLE_P): Update.
Thu Mar 11 13:55:52 1999 Richard Henderson <rth@cygnus.com>
* machmode.h (smallest_mode_for_size): Prototype.

12
gcc/config/alpha/alpha.h
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@ -620,18 +620,20 @@ extern void override_options ();
/* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
On Alpha, the integer registers can hold any mode. The floating-point
registers can hold 32-bit and 64-bit integers as well, but not 16-bit
or 8-bit values. If we only allowed the larger integers into FP registers,
we'd have to say that QImode and SImode aren't tiable, which is a
pain. So say all registers can hold everything and see how that works. */
or 8-bit values. */
#define HARD_REGNO_MODE_OK(REGNO, MODE) 1
#define HARD_REGNO_MODE_OK(REGNO, MODE) \
((REGNO) < 32 || ((MODE) != QImode && (MODE) != HImode))
/* Value is 1 if it is a good idea to tie two pseudo registers
when one has mode MODE1 and one has mode MODE2.
If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
for any hard reg, then this must be 0 for correct output. */
#define MODES_TIEABLE_P(MODE1, MODE2) 1
#define MODES_TIEABLE_P(MODE1, MODE2) \
((MODE1) == QImode || (MODE1) == HImode \
? (MODE2) == QImode || (MODE2) == HImode \
: 1)
/* Specify the registers used for certain standard purposes.
The values of these macros are register numbers. */