Macros for restoring saving registers to and from the stack exist.
Provide a macro for simply zeroing a range of gprs, or an individual
gpr.
Signed-off-by: Rohan McLure <rmcl...@linux.ibm.com>
---
arch/powerpc/include/asm/ppc_asm.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/powerpc/include/asm/ppc_asm.h
b/arch/powerpc/include/asm/ppc_asm.h
index 4dea2d963738..3fb37a9767f7 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -33,6 +33,19 @@
.endr
.endm
+/*
+ * Simplification of OP_REGS, for an arbitrary right hand operand.
+ *
+ * op reg, rhs
+ */
+.macro BINOP_REGS op, rhs, start, end
+ .Lreg=\start
+ .rept (\end - \start + 1)
+ \op .Lreg, \rhs
+ .Lreg=.Lreg+1
+ .endr
+.endm
+
/*
* Macros for storing registers into and loading registers from
* exception frames.
@@ -49,6 +62,10 @@
#define REST_NVGPRS(base) REST_GPRS(13, 31, base)
#endif
+#define ZERO_GPRS(start, end) BINOP_REGS li, 0, start, end
+#define ZERO_NVGPRS() ZERO_GPRS(14, 31)
+#define ZERO_GPR(n) ZERO_GPRS(n, n)
+
#define SAVE_GPR(n, base) SAVE_GPRS(n, n, base)
#define REST_GPR(n, base) REST_GPRS(n, n, base)
--
2.34.1
