summaryrefslogtreecommitdiffstats
path: root/arch/mips/mm/uasm.c
diff options
context:
space:
mode:
authorLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>2014-11-18 17:24:15 +0100
committerMarkos Chandras <markos.chandras@imgtec.com>2015-02-16 11:01:25 +0100
commit51eec48e1252ea39d21b5206e4962f09f823a369 (patch)
tree52b61709dd45d40c3980c3a8215aac915f05ac7e /arch/mips/mm/uasm.c
parentMIPS: Add build support for the MIPS R6 ISA (diff)
downloadlinux-51eec48e1252ea39d21b5206e4962f09f823a369.tar.xz
linux-51eec48e1252ea39d21b5206e4962f09f823a369.zip
MIPS: mm: uasm: Add signed 9-bit immediate related macros
MIPS R6 redefines several instructions and reduces the immediate field to 9-bits so add related macros for the microassembler. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'arch/mips/mm/uasm.c')
-rw-r--r--arch/mips/mm/uasm.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c
index 4adf30284813..f86d293463a6 100644
--- a/arch/mips/mm/uasm.c
+++ b/arch/mips/mm/uasm.c
@@ -24,7 +24,8 @@ enum fields {
JIMM = 0x080,
FUNC = 0x100,
SET = 0x200,
- SCIMM = 0x400
+ SCIMM = 0x400,
+ SIMM9 = 0x800,
};
#define OP_MASK 0x3f
@@ -41,6 +42,8 @@ enum fields {
#define FUNC_SH 0
#define SET_MASK 0x7
#define SET_SH 0
+#define SIMM9_SH 7
+#define SIMM9_MASK 0x1ff
enum opcode {
insn_invalid,
@@ -116,6 +119,14 @@ static inline u32 build_scimm(u32 arg)
return (arg & SCIMM_MASK) << SCIMM_SH;
}
+static inline u32 build_scimm9(s32 arg)
+{
+ WARN((arg > 0xff || arg < -0x100),
+ KERN_WARNING "Micro-assembler field overflow\n");
+
+ return (arg & SIMM9_MASK) << SIMM9_SH;
+}
+
static inline u32 build_func(u32 arg)
{
WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");