svn commit: r338445 - in head: share/mk stand sys/conf

[Ruslan Bukin]

Author: br
Date: Mon Sep  3 14:43:16 2018
New Revision: 338445
URL: https://svnweb.freebsd.org/changeset/base/338445

Log:
  Enable 'C'-compressed ISA extension.
  
  This was disabled recently due to lack of support in KDB disassembler
  and DTrace FBT provider. Support for 'C'-extension to both of these was
  added, so we can now enable 'C'-extension.
  
  This reduces size of the kernel important for low-end embedded devices,
  and saves cache footprint for high perfomance machines.
  
  Approved by:	re (kib)
  Sponsored by:	DARPA, AFRL

Modified:
  head/share/mk/bsd.cpu.mk
  head/stand/defs.mk
  head/sys/conf/kern.mk

Modified: head/share/mk/bsd.cpu.mk
==============================================================================
--- head/share/mk/bsd.cpu.mk	Mon Sep  3 14:34:09 2018	(r338444)
+++ head/share/mk/bsd.cpu.mk	Mon Sep  3 14:43:16 2018	(r338445)
@@ -367,9 +367,9 @@ CFLAGS += -mcpu=8540 -Wa,-me500 -mspe=yes -mabi=spe -m
 
 .if ${MACHINE_CPUARCH} == "riscv"
 .if ${MACHINE_ARCH:Mriscv*sf}
-CFLAGS += -march=rv64ima -mabi=lp64
+CFLAGS += -march=rv64imac -mabi=lp64
 .else
-CFLAGS += -march=rv64imafd -mabi=lp64d
+CFLAGS += -march=rv64imafdc -mabi=lp64d
 .endif
 .endif
 

Modified: head/stand/defs.mk
==============================================================================
--- head/stand/defs.mk	Mon Sep  3 14:34:09 2018	(r338444)
+++ head/stand/defs.mk	Mon Sep  3 14:43:16 2018	(r338445)
@@ -108,7 +108,7 @@ CFLAGS+=	-ffreestanding ${CFLAGS_NO_SIMD}
 .if ${MACHINE_CPUARCH} == "aarch64"
 CFLAGS+=	-mgeneral-regs-only -fPIC
 .elif ${MACHINE_CPUARCH} == "riscv"
-CFLAGS+=	-march=rv64ima -mabi=lp64
+CFLAGS+=	-march=rv64imac -mabi=lp64
 .else
 CFLAGS+=	-msoft-float
 .endif

Modified: head/sys/conf/kern.mk
==============================================================================
--- head/sys/conf/kern.mk	Mon Sep  3 14:34:09 2018	(r338444)
+++ head/sys/conf/kern.mk	Mon Sep  3 14:43:16 2018	(r338445)
@@ -131,7 +131,7 @@ INLINE_LIMIT?=	8000
 .endif
 
 .if ${MACHINE_CPUARCH} == "riscv"
-CFLAGS.gcc+=	-mcmodel=medany -march=rv64imafd -mabi=lp64
+CFLAGS.gcc+=	-mcmodel=medany -march=rv64imafdc -mabi=lp64
 INLINE_LIMIT?=	8000
 .endif