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

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20013 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2009-02-15 23:13:26 +00:00
parent 789b0a2eb9
commit d8ff94121f
2 changed files with 14 additions and 16 deletions
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19
apps/plugins/mandelbrot.c
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@ -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),