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(CLASS_CANNOT_CHANGE_SIZE): New macro.

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From-SVN: r7870
This commit is contained in:
Richard Kenner 1994-08-07 08:54:28 -04:00
parent 59e2c378c2
commit c31dfe4dc6
1 changed files with 5 additions and 0 deletions
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5
gcc/config/alpha/alpha.h
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@ -584,6 +584,11 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
#define CLASS_MAX_NREGS(CLASS, MODE) \
((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
/* If defined, gives a class of registers that cannot be used as the
operand of a SUBREG that changes the size of the object. */
#define CLASS_CANNOT_CHANGE_SIZE FLOAT_REGS
/* Define the cost of moving between registers of various classes. Moving
between FLOAT_REGS and anything else except float regs is expensive.
In fact, we make it quite expensive because we really don't want to