Let PowerPC world optionally build with -msoft-float. For FPU-less PowerPC

variations (e500 currently), this provides a gcc-level FPU emulation and is an
alternative approach to the recently introduced kernel-level emulation
(FPU_EMU).

Approved by:	cognet (mentor)
MFp4:		e500

6 files changed, 12 insertions, 0 deletions

diff --git a/lib/libc/powerpc/gen/flt_rounds.c b/lib/libc/powerpc/gen/flt_rounds.c
index ec32a36..6294be7 100644
--- a/lib/libc/powerpc/gen/flt_rounds.c
+++ b/lib/libc/powerpc/gen/flt_rounds.c
@@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <machine/float.h>
 
+#ifndef _SOFT_FLOAT
 static const int map[] = {
 	1,	/* round to nearest */
 	0,	/* round to zero */
@@ -52,3 +53,4 @@ __flt_rounds()
 	__asm__ __volatile("mffs %0" : "=f"(fpscr));
 	return map[(fpscr & 0x03)];
 }
+#endif
diff --git a/lib/libc/powerpc/gen/fpgetmask.c b/lib/libc/powerpc/gen/fpgetmask.c
index 4d9a3b0..aa7623b 100644
--- a/lib/libc/powerpc/gen/fpgetmask.c
+++ b/lib/libc/powerpc/gen/fpgetmask.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <ieeefp.h>
 
+#ifndef _SOFT_FLOAT
 fp_except_t
 fpgetmask()
 {
@@ -51,3 +52,4 @@ fpgetmask()
 	__asm__("mffs %0" : "=f"(fpscr));
 	return ((fp_except_t)((fpscr >> 3) & 0x1f));
 }
+#endif
diff --git a/lib/libc/powerpc/gen/fpgetround.c b/lib/libc/powerpc/gen/fpgetround.c
index 2e4b922..5381378 100644
--- a/lib/libc/powerpc/gen/fpgetround.c
+++ b/lib/libc/powerpc/gen/fpgetround.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <ieeefp.h>
 
+#ifndef _SOFT_FLOAT
 fp_rnd_t
 fpgetround()
 {
@@ -51,3 +52,4 @@ fpgetround()
 	__asm__("mffs %0" : "=f"(fpscr));
 	return ((fp_rnd_t)(fpscr & 0x3));
 }
+#endif
diff --git a/lib/libc/powerpc/gen/fpgetsticky.c b/lib/libc/powerpc/gen/fpgetsticky.c
index e8a21ca..feb2ccc 100644
--- a/lib/libc/powerpc/gen/fpgetsticky.c
+++ b/lib/libc/powerpc/gen/fpgetsticky.c
@@ -45,6 +45,7 @@
 #include <sys/types.h>
 #include <ieeefp.h>
 
+#ifndef _SOFT_FLOAT
 #ifdef __weak_alias
 __weak_alias(fpgetsticky,_fpgetsticky)
 #endif
@@ -57,3 +58,4 @@ fpgetsticky()
 	__asm__ __volatile("mffs %0" : "=f"(fpscr));
 	return ((fp_except_t)((fpscr >> 25) & 0x1f));
 }
+#endif
diff --git a/lib/libc/powerpc/gen/fpsetmask.c b/lib/libc/powerpc/gen/fpsetmask.c
index 76a6867..e1433a5 100644
--- a/lib/libc/powerpc/gen/fpsetmask.c
+++ b/lib/libc/powerpc/gen/fpsetmask.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <ieeefp.h>
 
+#ifndef _SOFT_FLOAT
 fp_except_t
 fpsetmask(fp_except_t mask)
 {
@@ -55,3 +56,4 @@ fpsetmask(fp_except_t mask)
 	__asm__ __volatile("mtfsf 0xff,%0" :: "f"(fpscr));
 	return (old);
 }
+#endif
diff --git a/lib/libc/powerpc/gen/fpsetround.c b/lib/libc/powerpc/gen/fpsetround.c
index 1337756..b4f00d4 100644
--- a/lib/libc/powerpc/gen/fpsetround.c
+++ b/lib/libc/powerpc/gen/fpsetround.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/types.h>
 #include <ieeefp.h>
 
+#ifndef _SOFT_FLOAT
 fp_rnd_t
 fpsetround(fp_rnd_t rnd_dir)
 {
@@ -55,3 +56,4 @@ fpsetround(fp_rnd_t rnd_dir)
 	__asm__ __volatile("mtfsf 0xff,%0" :: "f"(fpscr));
 	return (old);
 }
+#endif