powerpc/pseries: Simplify denormalization handler

The following simplifies the denorm code by using macros to generate the long
stream of almost identical instructions.

This patch results in no changes to the output binary, but removes a lot of
lines of code.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index e6eba1bf61ad55de486cd19f725743493e64cd84..3c9296bcf960f6f6fe07f819c6da06fd6d0083bf 100644 (file)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -454,38 +454,14 @@ BEGIN_FTR_SECTION
        xori    r10,r10,(MSR_FE0|MSR_FE1)
        mtmsrd  r10
        sync
-       fmr     0,0
-       fmr     1,1
-       fmr     2,2
-       fmr     3,3
-       fmr     4,4
-       fmr     5,5
-       fmr     6,6
-       fmr     7,7
-       fmr     8,8
-       fmr     9,9
-       fmr     10,10
-       fmr     11,11
-       fmr     12,12
-       fmr     13,13
-       fmr     14,14
-       fmr     15,15
-       fmr     16,16
-       fmr     17,17
-       fmr     18,18
-       fmr     19,19
-       fmr     20,20
-       fmr     21,21
-       fmr     22,22
-       fmr     23,23
-       fmr     24,24
-       fmr     25,25
-       fmr     26,26
-       fmr     27,27
-       fmr     28,28
-       fmr     29,29
-       fmr     30,30
-       fmr     31,31
+
+#define FMR2(n)  fmr (n), (n) ; fmr n+1, n+1
+#define FMR4(n)  FMR2(n) ; FMR2(n+2)
+#define FMR8(n)  FMR4(n) ; FMR4(n+4)
+#define FMR16(n) FMR8(n) ; FMR8(n+8)
+#define FMR32(n) FMR16(n) ; FMR16(n+16)
+       FMR32(0)
+
 FTR_SECTION_ELSE
 /*
  * To denormalise we need to move a copy of the register to itself.
@@ -495,38 +471,14 @@ FTR_SECTION_ELSE
        oris    r10,r10,MSR_VSX@h
        mtmsrd  r10
        sync
-       XVCPSGNDP(0,0,0)
-       XVCPSGNDP(1,1,1)
-       XVCPSGNDP(2,2,2)
-       XVCPSGNDP(3,3,3)
-       XVCPSGNDP(4,4,4)
-       XVCPSGNDP(5,5,5)
-       XVCPSGNDP(6,6,6)
-       XVCPSGNDP(7,7,7)
-       XVCPSGNDP(8,8,8)
-       XVCPSGNDP(9,9,9)
-       XVCPSGNDP(10,10,10)
-       XVCPSGNDP(11,11,11)
-       XVCPSGNDP(12,12,12)
-       XVCPSGNDP(13,13,13)
-       XVCPSGNDP(14,14,14)
-       XVCPSGNDP(15,15,15)
-       XVCPSGNDP(16,16,16)
-       XVCPSGNDP(17,17,17)
-       XVCPSGNDP(18,18,18)
-       XVCPSGNDP(19,19,19)
-       XVCPSGNDP(20,20,20)
-       XVCPSGNDP(21,21,21)
-       XVCPSGNDP(22,22,22)
-       XVCPSGNDP(23,23,23)
-       XVCPSGNDP(24,24,24)
-       XVCPSGNDP(25,25,25)
-       XVCPSGNDP(26,26,26)
-       XVCPSGNDP(27,27,27)
-       XVCPSGNDP(28,28,28)
-       XVCPSGNDP(29,29,29)
-       XVCPSGNDP(30,30,30)
-       XVCPSGNDP(31,31,31)
+
+#define XVCPSGNDP2(n) XVCPSGNDP(n,n,n) ; XVCPSGNDP(n+1,n+1,n+1)
+#define XVCPSGNDP4(n) XVCPSGNDP2(n) ; XVCPSGNDP2(n+2)
+#define XVCPSGNDP8(n) XVCPSGNDP4(n) ; XVCPSGNDP4(n+4)
+#define XVCPSGNDP16(n) XVCPSGNDP8(n) ; XVCPSGNDP8(n+8)
+#define XVCPSGNDP32(n) XVCPSGNDP16(n) ; XVCPSGNDP16(n+16)
+       XVCPSGNDP32(0)
+
 ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_206)
        mtspr   SPRN_HSRR0,r11
        mtcrf   0x80,r9