diff --git a/mach/powerpc/as/mach1.c b/mach/powerpc/as/mach1.c
index 998cd8d9c..c1651fcfe 100644
--- a/mach/powerpc/as/mach1.c
+++ b/mach/powerpc/as/mach1.c
@@ -3,3 +3,7 @@
  * $State$
  */
 
+#include <stdbool.h>
+
+extern quad emit_hi(struct expr_t* expr, bool is_signed);
+extern quad emit_lo(struct expr_t* expr);
diff --git a/mach/powerpc/as/mach2.c b/mach/powerpc/as/mach2.c
index 480c5faa3..3ecaf10cf 100644
--- a/mach/powerpc/as/mach2.c
+++ b/mach/powerpc/as/mach2.c
@@ -84,6 +84,9 @@
 %token <y_word> OP_LA
 %token <y_word> OP_LI32
 
+%token <y_word> OP_POWERPC_FIXUP
+%token <y_word> OP_HI OP_HA OP_LO
+
 /* Other token types */
 
 %type <y_word> c
diff --git a/mach/powerpc/as/mach3.c b/mach/powerpc/as/mach3.c
index 0f0bfdae7..724ba7312 100644
--- a/mach/powerpc/as/mach3.c
+++ b/mach/powerpc/as/mach3.c
@@ -102,6 +102,9 @@
 0,     OP_LA,                 0,                                       "la",
 0,     OP_LA,                 0,                                       "li",
 0,     OP_RS_RA_RA_C,         31<<26 | 444<<1,                         "mr",
+0,     OP_HI,                 0,                                       "hi16",
+0,     OP_HA,                0,                                        "ha16",
+0,     OP_LO,                 0,                                       "lo16",
 
 /* Branch processor instructions (page 20) */
 
@@ -270,7 +273,7 @@
 0,     OP_RS_RA_SH_ME6_SH_C,  30<<26 | 1<<2,                           "rldicr",
 0,     OP_RS_RA_SH_MB6_SH_C,  30<<26 | 2<<2,                           "rldic",
 0,     OP_RS_RA_SH_MB5_ME5_C, 21<<26,                                  "rlwinm",
-0,     OP_RS_RA_RB_MB6_C,     30<<26 | 8<<1,                           "rldcl", 
+0,     OP_RS_RA_RB_MB6_C,     30<<26 | 8<<1,                           "rldcl",
 0,     OP_RS_RA_RB_ME6_C,     30<<26 | 9<<1,                           "rldcr",
 0,     OP_RS_RA_RB_MB5_ME5_C, 23<<26,                                  "rlwnm",
 0,     OP_RS_RA_SH_MB6_SH_C,  30<<26 | 3<<2,                           "rldimi",
diff --git a/mach/powerpc/as/mach4.c b/mach/powerpc/as/mach4.c
index e1fb3fdf0..1ad180de4 100644
--- a/mach/powerpc/as/mach4.c
+++ b/mach/powerpc/as/mach4.c
@@ -19,9 +19,9 @@ operation
 	| OP_FRS_RA_D          FPR ',' e16 '(' GPR ')'    { emit4($1 | ($2<<21) | ($6<<16) | $4); }
 	| OP_FRS_RA_RB         FPR ',' GPR ',' GPR        { emit4($1 | ($2<<21) | ($4<<16) | ($6<<11)); }
 	| OP_FRT_FRA_FRB_C     c FPR ',' FPR ',' FPR      { emit4($1 | $2 | ($3<<21) | ($5<<16) | ($7<<11)); }
-	| OP_FRT_FRA_FRC_FRB_C c FPR ',' FPR ',' FPR ',' FPR { emit4($1 | $2 | ($3<<21) | ($5<<16) | ($9<<11) | ($7<<6)); } 
+	| OP_FRT_FRA_FRC_FRB_C c FPR ',' FPR ',' FPR ',' FPR { emit4($1 | $2 | ($3<<21) | ($5<<16) | ($9<<11) | ($7<<6)); }
 	| OP_FRT_FRA_FRC_C     c FPR ',' FPR ',' FPR      { emit4($1 | $2 | ($3<<21) | ($5<<16) | ($7<<6)); }
-	| OP_FRT_FRB_C         c FPR ',' FPR              { emit4($1 | $2 | ($3<<21) | ($5<<11)); } 
+	| OP_FRT_FRB_C         c FPR ',' FPR              { emit4($1 | $2 | ($3<<21) | ($5<<11)); }
 	| OP_FRT_RA_D          FPR ',' e16 '(' GPR ')'    { emit4($1 | ($2<<21) | ($6<<16) | $4); }
 	| OP_FRT_RA_RB         FPR ',' GPR ',' GPR        { emit4($1 | ($2<<21) | ($4<<16) | ($6<<11)); }
 	| OP_FRT_C             c FPR                      { emit4($1 | $2 | ($3<<21)); }
@@ -40,15 +40,15 @@ operation
 	| OP_RS_RA_D           GPR ',' e16 '(' GPR ')'    { emit4($1 | ($2<<21) | ($6<<16) | $4); }
 	| OP_RS_RA_DS          GPR ',' ds '(' GPR ')'     { emit4($1 | ($2<<21) | ($6<<16) | $4); }
 	| OP_RS_RA_NB          GPR ',' GPR ',' nb         { emit4($1 | ($2<<21) | ($4<<16) | ($6<<11)); }
-	| OP_RS_RA_UI          GPR ',' GPR ',' e16        { emit4($1 | ($4<<21) | ($2<<16) | $6); } 
-	| OP_RS_RA_UI_CC       C GPR ',' GPR ',' e16      { emit4($1 | ($5<<21) | ($3<<16) | $7); } 
+	| OP_RS_RA_UI          GPR ',' GPR ',' e16        { emit4($1 | ($4<<21) | ($2<<16) | $6); }
+	| OP_RS_RA_UI_CC       C GPR ',' GPR ',' e16      { emit4($1 | ($5<<21) | ($3<<16) | $7); }
 	| OP_RS_RA_RB          GPR ',' GPR ',' GPR        { emit4($1 | ($2<<21) | ($4<<16) | ($6<<11)); }
 	| OP_RS_RA_RB_C        c GPR ',' GPR ',' GPR      { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11)); }
 	| OP_RS_RA_RA_C        c GPR ',' GPR              { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($5<<11)); }
-	| OP_RS_RA_RB_MB5_ME5_C c GPR ',' GPR ',' GPR ',' u5 ',' u5 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | ($9<<6) | ($11<<1)); }  
+	| OP_RS_RA_RB_MB5_ME5_C c GPR ',' GPR ',' GPR ',' u5 ',' u5 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | ($9<<6) | ($11<<1)); }
 	| OP_RS_RA_RB_MB6_C    c GPR ',' GPR ',' GPR ',' u6 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | (($9&0x1F)<<6) | (($9&0x20)>>0)); }
 	| OP_RS_RA_RB_ME6_C    c GPR ',' GPR ',' GPR ',' u6 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | (($9&0x1F)<<6) | (($9&0x20)>>0)); }
-	| OP_RS_RA_SH_MB5_ME5_C c GPR ',' GPR ',' u5 ',' u5 ',' u5 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | ($9<<6) | ($11<<1)); }  
+	| OP_RS_RA_SH_MB5_ME5_C c GPR ',' GPR ',' u5 ',' u5 ',' u5 { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11) | ($9<<6) | ($11<<1)); }
 	| OP_RS_RA_SH_MB6_SH_C  c GPR ',' GPR ',' u6 ',' u6 { emit4($1 | $2 | ($5<<21) | ($3<<16) | (($7&0x1F)<<11) | ($9<<6) | (($7&0x20)>>4)); }
 	| OP_RS_RA_SH_ME6_SH_C  c GPR ',' GPR ',' u6 ',' u6 { emit4($1 | $2 | ($5<<21) | ($3<<16) | (($7&0x1F)<<11) | ($9<<6) | (($7&0x20)>>4)); }
 	| OP_RS_RA_SH5_C       c GPR ',' GPR ',' u5       { emit4($1 | $2 | ($5<<21) | ($3<<16) | ($7<<11)); }
@@ -66,7 +66,7 @@ c
 	: /* nothing */                          { $$ = 0; }
 	| C                                      { $$ = 1; }
 	;
-	
+
 e16
 	: absexp
 	{
@@ -75,8 +75,11 @@ e16
 			serror("16-bit value out of range");
 		$$ = (uint16_t) $1;
 	}
+	| OP_HI ASC_LPAR expr ASC_RPAR           { $$ = emit_hi(&$3, false); }
+	| OP_HA ASC_LPAR expr ASC_RPAR           { $$ = emit_hi(&$3, true); }
+	| OP_LO ASC_LPAR expr ASC_RPAR           { $$ = emit_lo(&$3); }
 	;
-		
+
 u8
 	: absexp
 	{
@@ -85,7 +88,7 @@ u8
 		$$ = $1;
 	}
 	;
-	
+
 u7
 	: absexp
 	{
@@ -94,7 +97,7 @@ u7
 		$$ = $1;
 	}
 	;
-	
+
 u6
 	: absexp
 	{
@@ -103,7 +106,7 @@ u6
 		$$ = $1;
 	}
 	;
-	
+
 u5
 	: absexp
 	{
@@ -112,7 +115,7 @@ u5
 		$$ = $1;
 	}
 	;
-	
+
 u4
 	: absexp
 	{
@@ -121,7 +124,7 @@ u4
 		$$ = $1;
 	}
 	;
-	
+
 u1
 	: absexp
 	{
@@ -130,7 +133,7 @@ u1
 		$$ = $1;
 	}
 	;
-	
+
 u2
 	: absexp
 	{
@@ -139,7 +142,7 @@ u2
 		$$ = $1;
 	}
 	;
-	
+
 ds
 	: e16
 	{
@@ -148,26 +151,26 @@ ds
 		$$ = $1;
 	}
 	;
-	
+
 nb
 	: absexp
 	{
 		if (($1 < 1) || ($1 > 32))
 			serror("register count must be in the range 1..32");
-	
+
 		if ($1 == 32)
 			$$ = 0;
 		else
-			$$ = $1;	
+			$$ = $1;
 	}
 	;
-	
+
 bdl
 	: expr
 	{
 		int dist = $1.val - DOTVAL;
 		fit(fitx(dist, 25));
-		
+
 		if (dist & 0x3)
 			serror("jump targets must be 4-aligned");
 
@@ -183,7 +186,7 @@ bda
 	{
 		int target = $1.val;
 		fit(fitx(target, 16));
-		
+
 		if (target & 0x3)
 			serror("jump targets must be 4-aligned");
 
@@ -193,7 +196,7 @@ bda
 		$$ = target & 0xFFFD;
 	}
 	;
-	
+
 li32
 	: GPR ',' expr
 	{
@@ -215,7 +218,7 @@ lil
 	{
 		int dist = $1.val - DOTVAL;
 		fit(fitx(dist, 26));
-		
+
 		if (dist & 0x3)
 			serror("jump targets must be 4-aligned");
 
@@ -223,13 +226,13 @@ lil
 		$$ = dist & 0x03FFFFFD;
 	}
 	;
-	
+
 lia
 	: expr
 	{
 		int target = $1.val;
 		fit(fitx(target, 26));
-		
+
 		if (target & 0x3)
 			serror("jump targets must be 4-aligned");
 
@@ -248,3 +251,14 @@ spr_num
 		$$ = ($1 >> 5) | (($1 & 0x1f) << 5);
 	}
 	;
+
+powerpcfixup
+	: expr
+	{
+		quad type = $1.typ & S_TYP;
+		quad val = $1.val;
+		if (type == S_ABS)
+			serror(".powerpcfixup is useless on absolute values");
+		newrelo($1.typ, RELOPPC | FIXUPFLAGS);
+	}
+	;
diff --git a/mach/powerpc/as/mach5.c b/mach/powerpc/as/mach5.c
index 998cd8d9c..e3e23f272 100644
--- a/mach/powerpc/as/mach5.c
+++ b/mach/powerpc/as/mach5.c
@@ -1,5 +1,38 @@
-/*
- * $Source$
- * $State$
- */
 
+quad emit_hi(struct expr_t* expr, bool is_signed)
+{
+    /* If this is a symbol reference, discard the symbol and keep only the
+        * offset part. */
+    quad type = expr->typ & S_TYP;
+    quad val = expr->val;
+    uint16_t hi = val >> 16;
+    uint16_t lo = val & 0xffff;
+
+    if (type != S_ABS)
+		newrelo(expr->typ, RELOPPC | FIXUPFLAGS);
+
+    /* If the low half of this relocation is going to be a memory operation,
+     * then it'll be treated as a signed value. That means that values greater
+     * than 0x7fff will cause the high word to have 1 subtracted from it; so
+     * we apply an adjustment here.
+     */
+
+    if (is_signed && (lo > 0x7fff))
+        hi++;
+
+    return hi;
+}
+
+quad emit_lo(struct expr_t* expr)
+{
+    quad type = expr->typ & S_TYP;
+    quad val = expr->val;
+
+    /* If the assembler stored a symbol for relocation later, we need to
+     * abandon it (because the relocation was generated by emit_ha). */
+
+    if (type != S_ABS)
+        relonami = 0;
+
+    return val & 0xffff;
+}
diff --git a/mach/powerpc/ncg/table b/mach/powerpc/ncg/table
index 6297f8889..1fc1f5b19 100644
--- a/mach/powerpc/ncg/table
+++ b/mach/powerpc/ncg/table
@@ -169,11 +169,15 @@ TOKENS
 /* Used only in instruction descriptions (to generate the correct syntax). */
 
 	GPRINDIRECT        = { GPR reg; INT off; }    4    off "(" reg ")".
+	GPRINDIRECT_OFFSET_LO = { GPR reg; ADDR adr; } 4   "lo16[" adr "](" reg ")".
 	CONST              = { INT val; }             4    val.
 
 /* Primitives */
 
 	LABEL              = { ADDR adr; }            4    adr.
+	LABEL_OFFSET_HI    = { ADDR adr; }            4    "hi16[" adr "]".
+	LABEL_OFFSET_HA    = { ADDR adr; }            4    "ha16[" adr "]".
+	LABEL_OFFSET_LO    = { ADDR adr; }            4    "lo16[" adr "]".
 	LOCAL              = { INT off; }             4.
 
 /* Allows us to use regvar() to refer to registers */
@@ -282,7 +286,7 @@ INSTRUCTIONS
   add             GPR:wo, GPR:ro, GPR:ro.
   addX "add."     GPR:wo, GPR:ro, GPR:ro.
   addi            GPR:wo, GPR:ro, CONST:ro.
-  addis           GPR:wo, GPR:ro, CONST:ro.
+  addis           GPR:wo, GPR:ro, CONST+LABEL_OFFSET_HI+LABEL_OFFSET_HA:ro.
   and             GPR:wo, GPR:ro, GPR:ro.
   andc            GPR:wo, GPR:ro, GPR:ro.
   andiX  "andi."  GPR:wo:cc, GPR:ro, CONST:ro.
@@ -329,10 +333,9 @@ INSTRUCTIONS
   lhz             GPR:wo, GPRINDIRECT:ro cost(4, 3).
   lhzx            GPR:wo, GPR:ro, GPR:ro cost(4, 3).
   li32            GPR:wo, CONST:ro cost(8, 2).
-  li32            GPR:wo, LABEL:ro cost(8, 2).
   lwzu            GPR:wo, GPRINDIRECT:ro cost(4, 3).
   lwzx            GPR:wo, GPR:ro, GPR:ro cost(4, 3).
-  lwz             GPR:wo, GPRINDIRECT:ro cost(4, 3).
+  lwz             GPR:wo, GPRINDIRECT+GPRINDIRECT_OFFSET_LO:ro cost(4, 3).
   nand            GPR:wo, GPR:ro, GPR:ro.
   neg             GPR:wo, GPR:ro.
   nor             GPR:wo, GPR:ro, GPR:ro.
@@ -342,7 +345,7 @@ INSTRUCTIONS
   mtspr           SPR:wo, GPR:ro cost(4, 2).
   or              GPR:wo, GPR:ro, GPR:ro.
   orc             GPR:wo, GPR:ro, GPR:ro.
-  ori             GPR:wo, GPR:ro, CONST:ro.
+  ori             GPR:wo, GPR:ro, CONST+LABEL_OFFSET_LO:ro.
   oris            GPR:wo, GPR:ro, CONST:ro.
   orX "or."       GPR:wo:cc, GPR:ro, GPR:ro.
   rlwinm          GPR:wo, GPR:ro, CONST:ro, CONST:ro, CONST:ro.
@@ -368,7 +371,7 @@ INSTRUCTIONS
   xori            GPR:wo, GPR:ro, CONST:ro.
   xoris           GPR:wo, GPR:ro, CONST:ro.
 
-  comment "!" LABEL:ro cost(0, 0).
+  comment "!"             LABEL:ro cost(0, 0).
 
 
 
@@ -405,7 +408,8 @@ MOVES
 	from LABEL to GPR
 		gen
 			COMMENT("move LABEL->GPR")
-			li32 %2, {LABEL, %1.adr}
+			addis %2, R0, {LABEL_OFFSET_HI, %1.adr}
+			ori %2, %2, {LABEL_OFFSET_LO, %1.adr}
 
 /* Sign extension */
 
@@ -1142,6 +1146,12 @@ PATTERNS
 			yields {IND_RC_H, %1.reg, %1.off}
 
 	pat loi $1==INT32                  /* Load word indirect */
+		with LABEL
+			uses REG
+			gen
+				addis %a, R0, {LABEL_OFFSET_HA, %1.adr}
+				lwz %a, {GPRINDIRECT_OFFSET_LO, %a, %1.adr}
+			yields %a
 		with GPR
 			yields {IND_RC_W, %1, 0}
 		with SUM_RC
diff --git a/man/powerpc_as.6 b/man/powerpc_as.6
new file mode 100644
index 000000000..8198d6bce
--- /dev/null
+++ b/man/powerpc_as.6
@@ -0,0 +1,33 @@
+.TH POWERPC_AS 1
+.ad
+.SH NAME
+powerpc_as \- assembler for PowerPC
+
+.SH SYNOPSIS
+as [options] argument ...
+
+.SH DESCRIPTION
+This assembler is made with the general framework
+described in \fIuni_ass\fP(6).
+
+.SH SYNTAX
+Most 32-bit integer and floating point instructions are supported, but not many
+short form instructions. Instructions which take 16-bit operands can additionally
+use the following special functions:
+
+.IP hi16[value], ha16[value]
+Returns the high half of the value of the expression; if the value is not absolute,
+also generates the appropriate fixup. Use of either of these \fImust\fR be followed,
+in the next instruction, by the corresponding use of \fBlo16[]\fR. Use \fBhi16[]\fR
+if the low half is going to interpret its payload as an unsigned value, and
+\fBha16[]\fR if it will be interpreted as a signed value (so that the high half can
+be adjusted to match).
+
+.IP lo16[]
+Returns the low half of the value of the expression. No fixup is generated. Use of
+\fBlo16[]\fR must come in the instruction immediately after a use of \fBhi16[]\fR or
+\fBha16[]\fR.
+
+.SH "SEE ALSO"
+uni_ass(6),
+ack(1)
diff --git a/util/led/archive.c b/util/led/archive.c
index e36958d17..7e39e9fb7 100644
--- a/util/led/archive.c
+++ b/util/led/archive.c
@@ -6,8 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include "arch.h"
 #include "out.h"
 #include "ranlib.h"
diff --git a/util/led/const.h b/util/led/const.h
index 40ad395b5..d2d27f51a 100644
--- a/util/led/const.h
+++ b/util/led/const.h
@@ -4,8 +4,6 @@
  */
 /* $Id$ */
 
-typedef int		bool;
-
 #define FALSE		0
 #define TRUE		1
 
diff --git a/util/led/debug.h b/util/led/debug.h
index 0e493185d..715409d25 100644
--- a/util/led/debug.h
+++ b/util/led/debug.h
@@ -17,3 +17,5 @@ extern int DEB;
 
 extern int Verbose;
 #define verbose(s, a1, a2, a3, a4)	(Verbose && do_verbose(s, a1, a2, a3, a4))
+
+extern void fatal(char* format, ...);
diff --git a/util/led/error.c b/util/led/error.c
index e7f4fc6ec..61dc7983e 100644
--- a/util/led/error.c
+++ b/util/led/error.c
@@ -6,9 +6,11 @@
 static char rcsid[] = "$Id$";
 #endif
 
-#include <stdarg.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdarg.h>
 #include <out.h>
 #include "const.h"
 
@@ -73,7 +75,7 @@ do_verbose(char *format, ...)
 static void
 diag(char *tail, char *format, va_list ap)
 {
-	extern char	*progname, *archname, *modulname; 
+	extern char	*progname, *archname, *modulname;
 
 	fprintf(stderr, "%s: ", progname);
 	if (archname && modulname)
diff --git a/util/led/extract.c b/util/led/extract.c
index 5878d527d..48a2f16c6 100644
--- a/util/led/extract.c
+++ b/util/led/extract.c
@@ -6,8 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include "out.h"
 #include "const.h"
 #include "debug.h"
diff --git a/util/led/finish.c b/util/led/finish.c
index 2eace760b..439d4b364 100644
--- a/util/led/finish.c
+++ b/util/led/finish.c
@@ -6,6 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include <out.h>
 #include "const.h"
 #include "defs.h"
diff --git a/util/led/main.c b/util/led/main.c
index 028bc3b3f..125f0c9a5 100644
--- a/util/led/main.c
+++ b/util/led/main.c
@@ -11,7 +11,9 @@ static char rcsid[] = "$Id$";
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include <out.h>
 #include "const.h"
 #include "debug.h"
@@ -168,7 +170,7 @@ first_pass(argv)
 		case 'c':
 			/*
 			 * Leave relocation information in the output, so that
-			 * a next pass can see where relocation was done. The 
+			 * a next pass can see where relocation was done. The
 			 * resulting output however is no longer relocatable.
 			 */
 			flagword &= ~RFLAG;
diff --git a/util/led/memory.c b/util/led/memory.c
index 6349c826a..df4ee99d9 100644
--- a/util/led/memory.c
+++ b/util/led/memory.c
@@ -22,6 +22,9 @@ static char rcsid[] = "$Id$";
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include <out.h>
 #include "const.h"
 #include "assert.h"
@@ -112,7 +115,7 @@ init_core()
 		incore = FALSE;	/* In core strategy failed. */
 		if (sbreak(AT_LEAST) == -1)
 			fatal("no core at all");
-		
+
 		base = BASE;
 		for (mem = mems; mem < &mems[NMEMS]; mem++) {
 			mem->mem_base = base;
@@ -198,15 +201,15 @@ compact(piece, incr, flag)
 		gain = (mem->mem_full + incr) >> SHIFT_COUNT;
 		if (incr < gain) incr = gain;
 	}
-	
+
 	/*
 	 * First, check that moving will result in enough space
 	 */
 	if (flag != FREEZE) {
 		gain = mem->mem_left;
 		for (mem = &mems[piece-1]; mem >= &mems[0]; mem--) {
-			/* 
-			 * Don't give it all away! 
+			/*
+			 * Don't give it all away!
 			 * If this does not give us enough, bad luck
 			 */
 			if (flag == FORCED)
@@ -224,8 +227,8 @@ compact(piece, incr, flag)
 		}
 		if (min == piece)
 		    for (mem = &mems[piece+1]; mem <= &mems[NMEMS - 1]; mem++) {
-			/* 
-			 * Don't give it all away! 
+			/*
+			 * Don't give it all away!
 			 * If this does not give us enough, bad luck
 			 */
 			if (flag == FORCED)
diff --git a/util/led/output.c b/util/led/output.c
index 0ee622e3a..835627631 100644
--- a/util/led/output.c
+++ b/util/led/output.c
@@ -6,6 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include <out.h>
 #include "const.h"
 #include "memory.h"
@@ -60,7 +64,7 @@ generate_section_names()
 	extern struct outsect	outsect[];
 	extern char		*core_alloc();
 
-	size = (long)outhead.oh_nsect * sizeof(struct outname); 
+	size = (long)outhead.oh_nsect * sizeof(struct outname);
 	name = (struct outname *)core_alloc(ALLOGLOB, size);
 	if (name == (struct outname *)0)
 		return;
diff --git a/util/led/read.c b/util/led/read.c
index 95ec7dd6b..3ea15925c 100644
--- a/util/led/read.c
+++ b/util/led/read.c
@@ -6,6 +6,11 @@
 static char rcsid[] = "$Id$";
 #endif
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
+
 int	infile;	/* The current input file. */
 
 rd_fatal()
diff --git a/util/led/relocate.c b/util/led/relocate.c
index c72965e75..7e2f9db10 100644
--- a/util/led/relocate.c
+++ b/util/led/relocate.c
@@ -9,6 +9,7 @@ static char rcsid[] = "$Id$";
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include <assert.h>
 #include "out.h"
 #include "const.h"
@@ -104,6 +105,24 @@ static uint32_t get_vc4_valu(char* addr)
 	assert(0 && "unrecognised VC4 instruction");
 }
 
+static bool is_powerpc_memory_op(uint32_t opcode)
+{
+	/* Tests for any PowerPC memory indirection instruction where the payload
+	 * is a *signed* 16-bit value. */
+	switch ((opcode & 0xfc000000) >> 26)
+	{
+		case 34: /* lbz */
+		case 40: /* lhz */
+		case 32: /* lwz */
+		case 38: /* stb */
+		case 44: /* sth */
+		case 36: /* stw */
+			return true;
+	}
+
+	return false;
+}
+
 /* PowerPC fixups are complex as we need to patch up to the next two
  * instructions in one of several different ways, depending on what the
  * instructions area.
@@ -125,8 +144,23 @@ static uint32_t get_powerpc_valu(char* addr, uint16_t type)
 		/* addis / ori instruction pair */
 		return ((opcode1 & 0xffff) << 16) | (opcode2 & 0xffff);
 	}
+	else if (((opcode1 & 0xfc1f0000) == 0x3c000000) &&
+	         is_powerpc_memory_op(opcode2))
+	{
+		/* addis / memoryop instruction pair */
+		uint16_t hi = opcode1 & 0xffff;
+		uint16_t lo = opcode2 & 0xffff;
 
-	assert(0 && "unrecognised PowerPC instruction");
+		/* Undo the sign adjustment (see mach/powerpc/as/mach5.c). */
+
+		if (lo > 0x7fff)
+			hi--;
+
+		return ((hi << 16) | lo);
+	}
+
+	fatal("Don't know how to read from PowerPC fixup on instructions 0x%08x+0x%08x",
+		opcode1, opcode2);
 }
 
 /*
@@ -263,14 +297,32 @@ static void put_powerpc_valu(char* addr, uint32_t value, uint16_t type)
 	else if (((opcode1 & 0xfc1f0000) == 0x3c000000) &&
 	         ((opcode2 & 0xfc000000) == 0x60000000))
 	{
+		/* addis / ori instruction pair */
 		uint16_t hi = value >> 16;
 		uint16_t lo = value & 0xffff;
 
 		write4((opcode1 & 0xffff0000) | hi, addr+0, type);
 		write4((opcode2 & 0xffff0000) | lo, addr+4, type);
 	}
+	else if (((opcode1 & 0xfc1f0000) == 0x3c000000) &&
+	         is_powerpc_memory_op(opcode2))
+	{
+		/* addis / memoryop instruction pair */
+		uint16_t hi = value >> 16;
+		uint16_t lo = value & 0xffff;
+
+		/* Apply the sign adjustment (see mach/powerpc/as/mach5.c). */
+
+		if (lo > 0x7fff)
+			hi++;
+
+		write4((opcode1 & 0xffff0000) | hi, addr+0, type);
+		write4((opcode2 & 0xffff0000) | lo, addr+4, type);
+	}
+
 	else
-		assert(0 && "unrecognised PowerPC instruction");
+		fatal("Don't know how to write a PowerPC fixup to instructions 0x%08x+0x%08x",
+			opcode1, opcode2);
 }
 
 /*
@@ -339,7 +391,7 @@ addrelo(relo, names, valu_out)
 		extern int		hash();
 		extern struct outname	*searchname();
 		extern unsigned 	indexof();
-		extern struct outhead	outhead; 
+		extern struct outhead	outhead;
 
 		name = searchname(local->on_mptr, hash(local->on_mptr));
 		if (name == (struct outname *)0)
diff --git a/util/led/save.c b/util/led/save.c
index 3804413d9..952649633 100644
--- a/util/led/save.c
+++ b/util/led/save.c
@@ -10,8 +10,10 @@ static char rcsid[] = "$Id$";
  * If everything is kept in core, we must save some things for the second pass.
  */
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include <string.h>
 #include "arch.h"
 #include "out.h"
diff --git a/util/led/scan.c b/util/led/scan.c
index a870f8e05..1740a14de 100644
--- a/util/led/scan.c
+++ b/util/led/scan.c
@@ -6,8 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #ifdef SYMDBUG
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/util/led/sym.c b/util/led/sym.c
index 2ec47b6b7..53f0f3440 100644
--- a/util/led/sym.c
+++ b/util/led/sym.c
@@ -10,8 +10,10 @@ static char rcsid[] = "$Id$";
  * Symbol table management.
  */
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include "out.h"
 #include "const.h"
 #include "memory.h"
@@ -49,7 +51,7 @@ init_symboltable()
  * in the hash table is followed. If the names match, a pointer to the outname
  * in this element of the list is returned. When a match cannot be found,
  * NIL is returned.
- */ 
+ */
 struct outname *
 searchname(string, hashval)
 	char			*string;
@@ -74,7 +76,7 @@ searchname(string, hashval)
 				debug("found %x, %x, %lx\n",
 					name->on_type, name->on_desc, name->on_valu, 0);
 				return name;
-			}	
+			}
 		symindex = sym->sy_next;
 	}
 	/* Not found. */
diff --git a/util/led/write.c b/util/led/write.c
index d77ea98ef..b916949ae 100644
--- a/util/led/write.c
+++ b/util/led/write.c
@@ -6,8 +6,10 @@
 static char rcsid[] = "$Id$";
 #endif
 
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdbool.h>
 #include <string.h>
 #include "out.h"
 #include "const.h"
@@ -75,7 +77,7 @@ end_write()
 	for (sectindex = 0; sectindex < outhead.oh_nsect; sectindex++)
 		wrt_name(sectname(sectindex), 1);
 }
-	
+
 wrt_emit(emit, sectindex, cnt)
 	char		*emit;
 	int		sectindex;