powerpc: Hardcode popcnt instructions for old assemblers

The popcnt instructions went into binutils relatively recently. As with a
number of other instructions, create macros and hardcode them.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 43adc8b..1255569 100644 (file)
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -36,6 +36,8 @@
 #define PPC_INST_NOP                   0x60000000
 #define PPC_INST_POPCNTB               0x7c0000f4
 #define PPC_INST_POPCNTB_MASK          0xfc0007fe
+#define PPC_INST_POPCNTD               0x7c0003f4
+#define PPC_INST_POPCNTW               0x7c0002f4
 #define PPC_INST_RFCI                  0x4c000066
 #define PPC_INST_RFDI                  0x4c00004e
 #define PPC_INST_RFMCI                 0x4c00004c
@@ -88,6 +90,12 @@
                                        __PPC_RB(b) | __PPC_EH(eh))
 #define PPC_MSGSND(b)          stringify_in_c(.long PPC_INST_MSGSND | \
                                        __PPC_RB(b))
+#define PPC_POPCNTB(a, s)      stringify_in_c(.long PPC_INST_POPCNTB | \
+                                       __PPC_RA(a) | __PPC_RS(s))
+#define PPC_POPCNTD(a, s)      stringify_in_c(.long PPC_INST_POPCNTD | \
+                                       __PPC_RA(a) | __PPC_RS(s))
+#define PPC_POPCNTW(a, s)      stringify_in_c(.long PPC_INST_POPCNTW | \
+                                       __PPC_RA(a) | __PPC_RS(s))
 #define PPC_RFCI               stringify_in_c(.long PPC_INST_RFCI)
 #define PPC_RFDI               stringify_in_c(.long PPC_INST_RFDI)
 #define PPC_RFMCI              stringify_in_c(.long PPC_INST_RFMCI)

diff --git a/arch/powerpc/lib/hweight_64.S b/arch/powerpc/lib/hweight_64.S
index ee2320b..fda2786 100644 (file)
--- a/arch/powerpc/lib/hweight_64.S
+++ b/arch/powerpc/lib/hweight_64.S
@@ -28,7 +28,7 @@ BEGIN_FTR_SECTION
        nop
        nop
 FTR_SECTION_ELSE
-       popcntb r3,r3
+       PPC_POPCNTB(r3,r3)
        clrldi  r3,r3,64-8
        blr
 ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
@@ -42,14 +42,14 @@ BEGIN_FTR_SECTION
        nop
 FTR_SECTION_ELSE
   BEGIN_FTR_SECTION_NESTED(50)
-       popcntb r3,r3
+       PPC_POPCNTB(r3,r3)
        srdi    r4,r3,8
        add     r3,r4,r3
        clrldi  r3,r3,64-8
        blr
   FTR_SECTION_ELSE_NESTED(50)
        clrlwi  r3,r3,16
-       popcntw r3,r3
+       PPC_POPCNTW(r3,r3)
        clrldi  r3,r3,64-8
        blr
   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 50)
@@ -66,7 +66,7 @@ BEGIN_FTR_SECTION
        nop
 FTR_SECTION_ELSE
   BEGIN_FTR_SECTION_NESTED(51)
-       popcntb r3,r3
+       PPC_POPCNTB(r3,r3)
        srdi    r4,r3,16
        add     r3,r4,r3
        srdi    r4,r3,8
@@ -74,7 +74,7 @@ FTR_SECTION_ELSE
        clrldi  r3,r3,64-8
        blr
   FTR_SECTION_ELSE_NESTED(51)
-       popcntw r3,r3
+       PPC_POPCNTW(r3,r3)
        clrldi  r3,r3,64-8
        blr
   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 51)
@@ -93,7 +93,7 @@ BEGIN_FTR_SECTION
        nop
 FTR_SECTION_ELSE
   BEGIN_FTR_SECTION_NESTED(52)
-       popcntb r3,r3
+       PPC_POPCNTB(r3,r3)
        srdi    r4,r3,32
        add     r3,r4,r3
        srdi    r4,r3,16
@@ -103,7 +103,7 @@ FTR_SECTION_ELSE
        clrldi  r3,r3,64-8
        blr
   FTR_SECTION_ELSE_NESTED(52)
-       popcntd r3,r3
+       PPC_POPCNTD(r3,r3)
        clrldi  r3,r3,64-8
        blr
   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 52)