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[Patch, AARCH64] Define REVERSIBLE_CC_MODE
- From: "Hurugalawadi, Naveen" <Naveen dot Hurugalawadi at caviumnetworks dot com>
- To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Tue, 8 Jan 2013 05:09:57 +0000
- Subject: [Patch, AARCH64] Define REVERSIBLE_CC_MODE
Hi,
AARCH64 back-end defines REVERSE_CONDITION but not REVERSIBLE_CC_MODE.
REVERSE_CONDITION is used only in case REVERSIBLE_CC_MODE (mode) is
nonzero.
Please find attached the patch that defines REVERSIBLE_CC_MODE for
aarch64 back-end. Please review the patch and let me know if there should be any
modifications?
Build and tested on aarch64-thunder-elf (using Cavium's internal
simulator).
Thanks,
Naveen.H.S
2013-01-08 Naveen H.S <Naveen.Hurugalawadi@caviumnetworks.com>
* config/aarch64/aarch64.h (REVERSIBLE_CC_MODE): Define.
--- gcc/config/aarch64/aarch64.h 2013-01-08 09:42:21.081034770 +0530
+++ gcc/config/aarch64/aarch64.h 2013-01-08 09:43:52.277037865 +0530
@@ -709,6 +709,14 @@ do { \
#define SELECT_CC_MODE(OP, X, Y) aarch64_select_cc_mode (OP, X, Y)
+/* A C expression whose value is one if it is always safe to reverse a
+ comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return
+ MODE for a floating-point inequality comparison, then
+ `REVERSIBLE_CC_MODE (MODE)' must be zero.
+ You need not define this macro if it would always returns zero or if the
+ floating-point format is anything other than `IEEE_FLOAT_FORMAT'. */
+#define REVERSIBLE_CC_MODE(MODE) 1
+
#define REVERSE_CONDITION(CODE, MODE) \
(((MODE) == CCFPmode || (MODE) == CCFPEmode) \
? reverse_condition_maybe_unordered (CODE) \