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pa.c (fmpyaddoperands, [...]): Cleanups suggested by Tege.

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* pa.c (fmpyaddoperands, fmpysuboperands): Cleanups suggested by
	Tege.

From-SVN: r3124
This commit is contained in:
Jeff Law 1993-01-06 12:41:06 -07:00
parent 83692f15e0
commit 88e5c02973
1 changed files with 10 additions and 23 deletions
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33
gcc/config/pa/pa.c
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@ -2551,10 +2551,8 @@ function_label_operand (op, mode)
return GET_CODE (op) == SYMBOL_REF && FUNCTION_NAME_P (XSTR (op, 0));
}
/* Returns 1 if the 5 operands specified in OPERANDS are suitable for
use in fmpyadd instructions. Because of the inout operand in the
add part this function may swap operands[3] and operands[4] to make them
suitable for fmpyadd instructions. */
/* Returns 1 if the 6 operands specified in OPERANDS are suitable for
use in fmpyadd instructions. */
int
fmpyaddoperands(operands)
rtx *operands;
@ -2573,7 +2571,8 @@ fmpyaddoperands(operands)
if (GET_MODE (operands[0]) != DFmode)
return 0;
/* Only 2 real operands to the addition. One input must be the output. */
/* Only 2 real operands to the addition. One of the input operands must
be the same as the output operand. */
if (! rtx_equal_p (operands[3], operands[4])
&& ! rtx_equal_p (operands[3], operands[5]))
return 0;
@ -2589,24 +2588,12 @@ fmpyaddoperands(operands)
|| rtx_equal_p (operands[5], operands[0]))
return 0;
/* Make the inout operand be operands[5] and operands[3]. Output template
assumes operands[4] is the read-only add operand. */
if (rtx_equal_p (operands[3], operands[4]))
{
rtx tmp;
tmp = operands[4];
operands[4] = operands[5];
operands[5] = tmp;
}
/* Passed. Operands are suitable for fmpyadd. */
return 1;
}
/* Returns 1 if the 5 operands specified in OPERANDS are suitable for
use in fmpysub instructions. It is very similar to fmpyaddoperands
above except operands[3] and operands[4] must be the same without
swapping. */
/* Returns 1 if the 6 operands specified in OPERANDS are suitable for
use in fmpysub instructions. */
int
fmpysuboperands(operands)
rtx *operands;
@ -2625,16 +2612,16 @@ fmpysuboperands(operands)
if (GET_MODE (operands[0]) != DFmode)
return 0;
/* Only 2 real operands to the subtraction. One input must be the output. */
/* Only 2 real operands to the subtraction. Subtraction is not a commutative
operation, so operands[4] must be the same as operand[3]. */
if (! rtx_equal_p (operands[3], operands[4]))
return 0;
/* multiply can not feed into subtraction. */
if (rtx_equal_p (operands[4], operands[0])
|| rtx_equal_p (operands[5], operands[0]))
if (rtx_equal_p (operands[5], operands[0]))
return 0;
/* Inout operand of add can not conflict with any operands from multiply. */
/* Inout operand of sub can not conflict with any operands from multiply. */
if (rtx_equal_p (operands[3], operands[0])
|| rtx_equal_p (operands[3], operands[1])
|| rtx_equal_p (operands[3], operands[2]))