* Writing out long long integers
@ 2004-10-04 20:08 Suriya Narayanan M S
2004-10-04 22:32 ` David Edelsohn
0 siblings, 1 reply; 2+ messages in thread
From: Suriya Narayanan M S @ 2004-10-04 20:08 UTC (permalink / raw)
To: gcc; +Cc: Suriya Narayanan M S
On PowerPC, GCC writes out long long constants in the data section as two
.long directives, but as a single .quad in x86.
For this code,
typedef unsigned long long uint64;
const uint64 bigconst = 1ULL << 34;
in PowerPC
bigconst:
.long 4
.long 0
and in x86
bigconst:
.quad 0x400000000
Is there a place which contains the formal specification for this?
Thanks,
Suriya
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Writing out long long integers
2004-10-04 20:08 Writing out long long integers Suriya Narayanan M S
@ 2004-10-04 22:32 ` David Edelsohn
0 siblings, 0 replies; 2+ messages in thread
From: David Edelsohn @ 2004-10-04 22:32 UTC (permalink / raw)
To: Suriya Narayanan M S; +Cc: gcc
>>>>> Suriya Narayanan M S writes:
Suriya> On PowerPC, GCC writes out long long constants in the data section as two
Suriya> .long directives, but as a single .quad in x86.
Suriya> For this code,
Suriya> typedef unsigned long long uint64;
Suriya> const uint64 bigconst = 1ULL << 34;
Suriya> in PowerPC
Suriya> bigconst:
Suriya> .long 4
Suriya> .long 0
Suriya> and in x86
Suriya> bigconst:
Suriya> .quad 0x400000000
Suriya> Is there a place which contains the formal specification for this?
PowerPC is an architecture, not a specific GCC target. Without
specifying the OS and file format, it is difficult to comment on your
message.
The syntax for emitting 64-bit constants is specified by the
definition of DOUBLE_INT_ASM_OP in the GCC configuration for the
particular PowerPC sub-target.
David
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