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Re: [PATCH, ARM] soft/hard-float preprocessor symbol
On Mon, 2010-07-26 at 13:01 +0800, Chung-Lin Tang wrote:
> Richard Earnshaw wrote:
> > The tests should be on arm_pcs_default. If that has the value
> > ARM_PCS_AAPCS_VFP then __ARM_PCS_VFP should be defined. If it has the
> > value ARM_PCS_AAPCS, then __ARM_PCS should be defined. In other cases,
> > I think neither should be defined (leaving the option open to create new
> > pre-processor defines in future).
> >
> > That does leave nothing defined for the IWMMXT variant. I'm not
> > entirely sure what to do about that. It appears that this just follows
> > the base standard for calling, in which case __ARM_PCS probably should
> > be defined, but I want to think that case through further before making
> > that decision: there may be a subtlety that I've missed.
> >
> > R.
> Hi Richard, I have update the patch as you have suggested.
> Please see if this is okay.
This is OK, but it needs an updated changelog entry (covering the
changes to arm.c as well).
R.
>
> Thanks,
> Chung-Lin
>
>
> plain text document attachment (pcs2.diff)
> Index: arm.c
> ===================================================================
> --- arm.c (revision 162525)
> +++ arm.c (working copy)
> @@ -711,7 +711,7 @@
> the next function. */
> static int after_arm_reorg = 0;
>
> -static enum arm_pcs arm_pcs_default;
> +enum arm_pcs arm_pcs_default;
>
> /* For an explanation of these variables, see final_prescan_insn below. */
> int arm_ccfsm_state;
> Index: arm.h
> ===================================================================
> --- arm.h (revision 162525)
> +++ arm.h (working copy)
> @@ -94,7 +94,13 @@
> if (arm_arch_iwmmxt) \
> builtin_define ("__IWMMXT__"); \
> if (TARGET_AAPCS_BASED) \
> - builtin_define ("__ARM_EABI__"); \
> + { \
> + if (arm_pcs_default == ARM_PCS_AAPCS_VFP) \
> + builtin_define ("__ARM_PCS_VFP"); \
> + else if (arm_pcs_default == ARM_PCS_AAPCS) \
> + builtin_define ("__ARM_PCS"); \
> + builtin_define ("__ARM_EABI__"); \
> + } \
> } while (0)
>
> /* The various ARM cores. */
> @@ -1641,6 +1647,9 @@
> ARM_PCS_UNKNOWN
> };
>
> +/* Default procedure calling standard of current compilation unit. */
> +extern enum arm_pcs arm_pcs_default;
> +
> /* A C type for declaring a variable that is used as the first argument of
> `FUNCTION_ARG' and other related values. */
> typedef struct