Get rid of a useless copy instruction in the SH1 32*32->64bit multiply routines (signed and unsigned).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20013 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 14 insertions, 16 deletions

diff --git a/apps/plugins/mandelbrot.c b/apps/plugins/mandelbrot.c
index c69d5de125..c18b1f453a 100644
--- a/apps/plugins/mandelbrot.c
+++ b/apps/plugins/mandelbrot.c
@@ -415,14 +415,13 @@ static inline long muls32_asr26(long a, long b)
         "addc    %[t2],%[t3] \n" /* t3 += t2, carry -> t2 */
         "movt    %[t2]       \n"
         "mulu    %[a],%[b]   \n" /* b * d */
-        "mov     %[t3],%[t1] \n" /* t2t3 <<= 16 */
+        "mov     %[t3],%[t1] \n" /* t1t3 = t2t3 << 16 */
         "xtrct   %[t2],%[t1] \n"
-        "mov     %[t1],%[t2] \n"
         "shll16  %[t3]       \n"
-        "sts     macl,%[t1]  \n" /* lo = b * d */
-        "clrt                \n" /* hi.lo += t2t3 */
-        "addc    %[t3],%[t1] \n"
-        "addc    %[t2],%[r]  \n"
+        "sts     macl,%[t2]  \n" /* lo = b * d */
+        "clrt                \n" /* hi.lo += t1t3 */
+        "addc    %[t3],%[t2] \n"
+        "addc    %[t1],%[r]  \n"
         "cmp/pz  %[a]        \n" /* ab >= 0 ? */
         "bt      1f          \n"
         "sub     %[b],%[r]   \n" /* no: hi -= cd (sign extension of ab is -1) */
@@ -435,10 +434,10 @@ static inline long muls32_asr26(long a, long b)
         "shll2   %[r]        \n" /* hi <<= 6 */
         "shll2   %[r]        \n"
         "shll2   %[r]        \n"
-        "shlr16  %[t1]       \n" /* (unsigned)lo >>= 26 */
-        "shlr8   %[t1]       \n"
-        "shlr2   %[t1]       \n"
-        "or      %[t1],%[r]  \n" /* combine result */
+        "shlr16  %[t2]       \n" /* (unsigned)lo >>= 26 */
+        "shlr8   %[t2]       \n"
+        "shlr2   %[t2]       \n"
+        "or      %[t2],%[r]  \n" /* combine result */
         : /* outputs */
         [r] "=&r"(r),
         [t1]"=&r"(t1),
diff --git a/apps/recorder/resize.h b/apps/recorder/resize.h
index d1dabaae09..4ea4eaa9a0 100644
--- a/apps/recorder/resize.h
+++ b/apps/recorder/resize.h
@@ -78,14 +78,13 @@ static inline unsigned sc_mul32(unsigned a, unsigned b)
         "addc    %[t2], %[t3]    \n" /* t3 += t2, carry -> t2 */
         "movt    %[t2]           \n"
         "mulu    %[a], %[b]      \n" /* b * d */
-        "mov     %[t3], %[t1]    \n" /* t2t3 <<= 16 */
+        "mov     %[t3], %[t1]    \n" /* t1t3 = t2t3 << 16 */
         "xtrct   %[t2], %[t1]    \n"
-        "mov     %[t1], %[t2]    \n"
         "shll16  %[t3]           \n"
-        "sts     macl, %[t1]     \n" /* lo = b * d */
-        "clrt                    \n" /* hi.lo += t2t3 */
-        "addc    %[t3], %[t1]    \n"
-        "addc    %[t2], %[r]     \n"
+        "sts     macl, %[t2]     \n" /* lo = b * d */
+        "clrt                    \n" /* hi.lo += t1t3 */
+        "addc    %[t3], %[t2]    \n"
+        "addc    %[t1], %[r]     \n"
         : /* outputs */
         [r] "=&r"(r),
         [t1]"=&r"(t1),