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(SECONDARY_{INPUT,OUTPUT}_RELOAD_CLASS): Need GENERAL_REGS for paradoxical SUBREG and FLOAT_REGS.

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(SECONDARY_{INPUT,OUTPUT}_RELOAD_CLASS): Need GENERAL_REGS for
paradoxical SUBREG and FLOAT_REGS.
(SECONDARY_NEEDED_MODE): Use actual mode for 4 bytes or wider.

From-SVN: r9209
This commit is contained in:
Richard Kenner 1995-03-18 16:59:49 -05:00
parent 7a5b18b055
commit e868b5184e
1 changed files with 10 additions and 2 deletions
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12
gcc/config/alpha/alpha.h
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@ -545,7 +545,8 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
/* Loading and storing HImode or QImode values to and from memory
usually requires a scratch register. The exceptions are loading
QImode and HImode from an aligned address to a general register.
We also cannot load an unaligned address into an FP register. */
We also cannot load an unaligned address or a paradodixal SUBREG into an
FP register. */
#define SECONDARY_INPUT_RELOAD_CLASS(CLASS,MODE,IN) \
(((GET_CODE (IN) == MEM \
@ -561,6 +562,9 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
? GENERAL_REGS \
: ((CLASS) == FLOAT_REGS && GET_CODE (IN) == MEM \
&& GET_CODE (XEXP (IN, 0)) == AND) ? GENERAL_REGS \
: ((CLASS) == FLOAT_REGS && GET_CODE (IN) == SUBREG \
&& (GET_MODE_SIZE (GET_MODE (IN)) \
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (IN))))) ? GENERAL_REGS \
: NO_REGS)
#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS,MODE,OUT) \
@ -575,7 +579,10 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
? GENERAL_REGS \
: ((CLASS) == FLOAT_REGS && GET_CODE (OUT) == MEM \
&& GET_CODE (XEXP (OUT, 0)) == AND) ? GENERAL_REGS \
: NO_REGS)
: ((CLASS) == FLOAT_REGS && GET_CODE (OUT) == SUBREG \
&& (GET_MODE_SIZE (GET_MODE (OUT)) \
> GET_MODE_SIZE (GET_MODE (SUBREG_REG (OUT))))) ? GENERAL_REGS \
: NO_REGS)
/* If we are copying between general and FP registers, we need a memory
location. */
@ -589,6 +596,7 @@ enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
area is very tricky! */
#define SECONDARY_MEMORY_NEEDED_MODE(MODE) \
(GET_MODE_CLASS (MODE) == MODE_FLOAT ? (MODE) \
: GET_MODE_SIZE (MODE) >= 4 ? (MODE) \
: mode_for_size (BITS_PER_WORD, GET_MODE_CLASS (MODE), 0))
/* Return the maximum number of consecutive registers