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mode dependent constants
- To: gcc at gcc dot gnu dot org
- Subject: mode dependent constants
- From: brahmaiah vallabhaneni <vbrahmaiah at yahoo dot com>
- Date: Thu, 8 Feb 2001 21:15:22 -0800 (PST)
- Cc: hp at axis dot se
Hi,
I am working for gcc z80 port.
In z80 the valid constants range depends on the
instruction that involves the constants.
If it is an 8 bit operation, the valid range is
-128 to 127 and it differs in the 16 bit
operations.
But in gcc I am not able to figure out how to
handle this. The macro LEGITIMATE_CONSTANT
checks for the valid constant range. But actually if
I say
some mode dependent check, it does n't work.
May be because constants can pass any mode.
Could you please tell me how to handle this.
If I am assuming something wrong please let me
know.thanks and regards
V.Brahmaiah
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