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authorPaul Mundt <lethal@linux-sh.org>2007-08-21 16:56:56 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-08-21 16:56:56 +0900
commitda2f5f7bf4a39f9613fc04d7030cffb63e435e1d (patch)
tree6f650eb49cb3d308a28fdda38dc79ae82935c0ac /arch/sh/Makefile
parent8eb891fc809b2300137bcd247025628c06c95a63 (diff)
downloadop-kernel-dev-da2f5f7bf4a39f9613fc04d7030cffb63e435e1d.zip
op-kernel-dev-da2f5f7bf4a39f9613fc04d7030cffb63e435e1d.tar.gz
sh: Fix DSP opcode regression for SH3-DSP parts.
Older versions of binutils do not support -Wa,-isa= tuning, which is something we rely on for enabling DSP opcode support on the newer parts. SH3-DSP parts can still be handled with -Wa,-dsp even if the newer parts require the newer versions of binutils for supporting the new opcodes. This was broken in -rc1 when the SH4AL-DSP support was being reworked, and is needed to get SH3-DSP working with older toolchains again. Reported-by: Markus Brunner <super.firetwister@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/Makefile')
-rw-r--r--arch/sh/Makefile17
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/sh/Makefile b/arch/sh/Makefile
index 3d211aa..97ac586 100644
--- a/arch/sh/Makefile
+++ b/arch/sh/Makefile
@@ -34,6 +34,8 @@ isa-y := $(isa-y)-nofpu
endif
endif
+isa-y := $(isa-y)-up
+
cflags-$(CONFIG_CPU_SH2) := $(call cc-option,-m2,)
cflags-$(CONFIG_CPU_SH2A) += $(call cc-option,-m2a,) \
$(call cc-option,-m2a-nofpu,)
@@ -46,7 +48,20 @@ cflags-$(CONFIG_CPU_SH4A) += $(call cc-option,-m4a,) \
cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mb
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -ml
-cflags-y += $(call as-option,-Wa$(comma)-isa=$(isa-y),) -ffreestanding
+#
+# -Wa,-isa= tuning implies -Wa,-dsp for the versions of binutils that
+# support it, while -Wa,-dsp by itself limits the range of usable opcodes
+# on certain CPU subtypes. Try the ISA variant first, and if that fails,
+# fall back on -Wa,-dsp for the old binutils versions. Even without DSP
+# opcodes, we always want the best ISA tuning the version of binutils
+# will provide.
+#
+isaflags-y := $(call as-option,-Wa$(comma)-isa=$(isa-y),)
+
+isaflags-$(CONFIG_SH_DSP) := \
+ $(call as-option,-Wa$(comma)-isa=$(isa-y),-Wa$(comma)-dsp)
+
+cflags-y += $(isaflags-y) -ffreestanding
cflags-$(CONFIG_MORE_COMPILE_OPTIONS) += \
$(shell echo $(CONFIG_COMPILE_OPTIONS) | sed -e 's/"//g')
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