diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2018-09-08 00:13:10 +0200 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2018-09-10 18:25:38 +0200 |
| commit | 00a99339f0a30b593d06f31499c4bbd965979567 (patch) | |
| tree | 7c36b5bb4416560db06c961b14cbfab6df31a57e /arch/arc/Makefile | |
| parent | Linux 4.19-rc3 (diff) | |
| download | linux-00a99339f0a30b593d06f31499c4bbd965979567.tar.xz linux-00a99339f0a30b593d06f31499c4bbd965979567.zip | |
ARCv2: build: use mcpu=hs38 iso generic mcpu=archs
helps gcc with better instruction selections such as 64-bit multiply MPYD
before
------
82c34b58 <sched_clock>:
82c34b58: ld r2,[0x83068d00]
82c34b60: add_s r2,r2,0x7530
82c34b66: mov_s r0,0x989680
82c34b6c: mpymu r5,r2,r0
82c34b70: mpy r4,r2,r0
82c34b74: mov_s r0,r4
82c34b76: j_s.d [blink]
82c34b78: mov_s r1,r5
82c34b7a: nop_s
after
------
82c34b7c <sched_clock>:
82c34b7c: ld r0,[0x83064d00]
82c34b84: add_s r0,r0,0x7530
82c34b8a: mpydu r0,r0,0x989680
82c34b92: j_s [blink]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Makefile')
| -rw-r--r-- | arch/arc/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 99cce77ab98f..dcc0f0cb0ca5 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -18,7 +18,7 @@ KBUILD_DEFCONFIG := nsim_700_defconfig cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ cflags-$(CONFIG_ISA_ARCOMPACT) += -mA7 -cflags-$(CONFIG_ISA_ARCV2) += -mcpu=archs +cflags-$(CONFIG_ISA_ARCV2) += -mcpu=hs38 is_700 = $(shell $(CC) -dM -E - < /dev/null | grep -q "ARC700" && echo 1 || echo 0) |