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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-06-21 13:51:41 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-22 10:24:24 +0100
commit1a6be26d5b1a86f66ef60e5b73bae64d50873724 (patch)
treec56cc8ed28d9d9dc062043a0a7862e1692908770
parentd6551e884cf66de072b81f8b6d23259462c40baf (diff)
[ARM] Enable VFP to be built when non-VFP capable CPUs are selected
Since we pass flags to the compiler to control code generation based on the least capable selected CPU, if we want to include VFP support, we must tweak the assembler flags to allow the VFP instructions. Moreover, we must not use the mrrc/mcrr versions since these will not be recognised by the assembler. We do not convert all instructions to the VFP-equivalent (yet) since binutils appears to barf on "fmrx rn, fpinst" and doesn't provide any other way (other than using the mrc equivalent) to encode this instruction - which is rather a problem when you have a VFP implementation which requires these instructions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/vfp/Makefile5
-rw-r--r--arch/arm/vfp/vfphw.S4
2 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/vfp/Makefile b/arch/arm/vfp/Makefile
index afabac31dd1d..7e136e77971a 100644
--- a/arch/arm/vfp/Makefile
+++ b/arch/arm/vfp/Makefile
@@ -7,6 +7,9 @@
# EXTRA_CFLAGS := -DDEBUG
# EXTRA_AFLAGS := -DDEBUG
+AFLAGS :=$(AFLAGS:-msoft-float=-Wa,-mfpu=softvfp+vfp)
+LDFLAGS +=--no-warn-mismatch
+
obj-y += vfp.o
-vfp-$(CONFIG_VFP) += entry.o vfpmodule.o vfphw.o vfpsingle.o vfpdouble.o
+vfp-$(CONFIG_VFP) += vfpmodule.o entry.o vfphw.o vfpsingle.o vfpdouble.o
diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S
index a3f65b47aea9..eb683cd77163 100644
--- a/arch/arm/vfp/vfphw.S
+++ b/arch/arm/vfp/vfphw.S
@@ -192,7 +192,7 @@ vfp_get_double:
add pc, pc, r0, lsl #3
mov r0, r0
.irp dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
- mrrc p11, 1, r0, r1, c\dr @ fmrrd r0, r1, d\dr
+ fmrrd r0, r1, d\dr
mov pc, lr
.endr
@@ -206,6 +206,6 @@ vfp_put_double:
add pc, pc, r0, lsl #3
mov r0, r0
.irp dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
- mcrr p11, 1, r1, r2, c\dr @ fmdrr r1, r2, d\dr
+ fmdrr d\dr, r1, r2
mov pc, lr
.endr