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
_______________________________________________
svn-src-head@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
