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Makefile.inc: Add math macros 

Add macros to standardize math done in the Makefiles in a posix
compliant manner.

int-multiply takes an arbitrary list of values to multiply, the same as
the int-addition macro.

The other macros only work on two values at a time.

Change-Id: I3b754b9bcde26f33edc4f945d5af3d5444f383c7
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/10874
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Martin Roth 2015-07-03 12:54:14 -06:00
parent 8cce701b56
commit 47abc54ec3
1 changed files with 21 additions and 5 deletions
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26
Makefile.inc
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@ -72,15 +72,31 @@ $(foreach supported_arch,$(ARCH_SUPPORTED), \
$(eval $(call define_class,rmodules_$(supported_arch),$(supported_arch))))
#######################################################################
# Helper functions for various file placement matters
# Helper functions for math and various file placement matters.
# macros work on all formats understood by printf(1)
# values are space separated if using more than one value
#
# int-add: adds an arbitrary number of space-separated integers in
# all formats understood by printf(1)
# int-align: align $1 to $2 units
# file-size: returns the filesize of the given file
# int-add: adds an arbitrary length list of integers
# int-subtract: subtracts the the second of two integers from the first
# int-multiply: multiplies an arbitrary length list of integers
# int-divide: divides the first integer by the second
# int-remainder: arithmetic remainder of the first number divided by the second
# int-lt: 1 if the first value is less than the second. 0 otherwise
# int-gt: 1 if the first values is greater than the second. 0 otherwise
# int-eq: 1 if the two values are equal. 0 otherwise
# int-align: align $1 to $2 units
# file-size: returns the filesize of the given file
_toint=$(shell printf "%d" $1)
_int-add2=$(shell expr $(call _toint,$1) + $(call _toint,$2))
int-add=$(if $(filter 1,$(words $1)),$(strip $1),$(call int-add,$(call _int-add2,$(word 1,$1),$(word 2,$1)) $(wordlist 3,$(words $1),$1)))
int-subtract=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) - $(call _toint,$(word 2,$1))))
_int-multiply2=$(shell expr $(call _toint,$1) \* $(call _toint,$2))
int-multiply=$(if $(filter 1,$(words $1)),$(strip $1),$(call int-multiply,$(call _int-multiply2,$(word 1,$1),$(word 2,$1)) $(wordlist 3,$(words $1),$1)))
int-divide=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) / $(call _toint,$(word 2,$1))))
int-remainder=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) % $(call _toint,$(word 2,$1))))
int-lt=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) \< $(call _toint,$(word 2,$1))))
int-gt=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) \> $(call _toint,$(word 2,$1))))
int-eq=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) = $(call _toint,$(word 2,$1))))
int-align=$(shell A=$(call _toint,$1) B=$(call _toint,$2); expr $$A + \( \( $$B - \( $$A % $$B \) \) % $$B \) )
file-size=$(shell cat $1 | wc -c)