From: Alexey Brodkin Date: Thu, 16 Jul 2015 18:45:38 +0000 (+0300) Subject: ARCv2: add knob for DIV_REV in Kconfig X-Git-Tag: submit/tizen/20160607.132125~1985^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d05a76ab4d9ece9bd987a8c29e3f384ec9f7b211;p=sdk%2Femulator%2Femulator-kernel.git ARCv2: add knob for DIV_REV in Kconfig Being highly configurable core ARC HS among other features might be configured with or without DIV_REM_OPTION (hardware divider). That option when enabled adds following instructions: div, divu, rem, remu. By default ARC HS38 has this option enabled. So we add here possibility to disable usage of hardware divider by compiler. Signed-off-by: Alexey Brodkin Signed-off-by: Vineet Gupta --- diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 91cf405..f7cfa7d 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -379,6 +379,10 @@ config ARC_HAS_LL64 dest operands with 2 possible source operands. default y +config ARC_HAS_DIV_REM + bool "Insn: div, divu, rem, remu" + default y + config ARC_HAS_RTC bool "Local 64-bit r/o cycle counter" default n diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 46d8731..8a27a48 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -36,8 +36,16 @@ cflags-$(atleast_gcc44) += -fsection-anchors cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape +ifdef CONFIG_ISA_ARCV2 + ifndef CONFIG_ARC_HAS_LL64 -cflags-$(CONFIG_ISA_ARCV2) += -mno-ll64 +cflags-y += -mno-ll64 +endif + +ifndef CONFIG_ARC_HAS_DIV_REM +cflags-y += -mno-div-rem +endif + endif cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables