Re: [Xenomai-help] Problem compiling 2.5.1

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Ivan Kalatchev wrote:
> I have compiler error when compiling xenomai-2.5.1. Again probably because
> my tool chain is outdated - gcc 3.4.4.
> (...)
> {standard input}:102: Error: bad instruction `lsrs sl,r7,#30'
> (...)
> 
> Is there way to modify assembler code so that code would compile ?  

Ok. lsrs looks like a valid instruction, but s1 looks strange as a
register name. The problem may be to call the variable "s", could you
try to call it "sign" instead ? This way:

diff --git a/include/asm-arm/arith.h b/include/asm-arm/arith.h
index 9af5c5c..4ea5aae 100644
--- a/include/asm-arm/arith.h
+++ b/include/asm-arm/arith.h
@@ -32,6 +32,7 @@ rthal_arm_nodiv_llimd(const long long op,

 #include <asm-generic/xenomai/arith.h>

+#if __LINUX_ARM_ARCH__ >= 4
 #define rthal_arm_nodiv_ullimd_str			\
 	"umull %[tl], %[rl], %[opl], %[fracl]\n\t"	\
 	"umull %[rm], %[rh], %[oph], %[frach]\n\t"	\
@@ -49,8 +50,6 @@ rthal_arm_nodiv_llimd(const long long op,
 	"umlal %[rm], %[rh], %[opl], %[integ]\n\t"	\
 	"mla %[rh], %[oph], %[integ], %[rh]\n\t"

-
-#if __LINUX_ARM_ARCH__ >= 4
 static inline __attribute__((__const__)) unsigned long long
 rthal_arm_nodiv_ullimd(const unsigned long long op,
 		       const unsigned long long frac,
@@ -101,19 +100,19 @@ rthal_arm_nodiv_llimd(const long long op,
 	__rthal_u64tou32(op, oph, opl);
 	__rthal_u64tou32(frac, frach, fracl);
 	
-	__asm__ ("lsrs %[s], %[oph], #30\n\t"
+	__asm__ ("lsrs %[sign], %[oph], #30\n\t"
 		 "beq 1f\n\t"
 		 "rsbs  %[opl], %[opl], #0\n\t"
 		 "rsc  %[oph], %[oph], #0\n"
 		 "1:\t"
 		 rthal_arm_nodiv_ullimd_str
-		 "teq %[s], #0\n\t"
+		 "teq %[sign], #0\n\t"
 		 "beq 2f\n\t"
 		 "rsbs  %[rm], %[rm], #0\n\t"
 		 "rsc  %[rh], %[rh], #0\n"
 		 "2:\t"
 		 : [rl]"=r"(rl), [rm]"=r"(rm), [rh]"=r"(rh),
-		   [tl]"=r"(tl), [th]"=r"(th), [s]"=r"(s)
+		   [tl]"=r"(tl), [th]"=r"(th), [sign]"=r"(s)
 		 : [opl]"r"(opl), [oph]"r"(oph),
 		   [fracl]"r"(fracl), [frach]"r"(frach),
 		   [integ]"r"(integ)


If it does not work, tell me and we will disable this implementation of
rthal_nodiv_llimd for gcc versions < 4.

-- 
					    Gilles.