or1k: Fix issues with msoft-div

Fixes bad assembly logic with software divide as reported by Richard Selvaggi.
Also, add a basic test to verify the soft math works when enabled.

gcc/testsuite/ChangeLog:

	PR target/90362
	* gcc.target/or1k/div-mul-3.c: New test.

libgcc/ChangeLog:

	PR target/90362
	* config/or1k/lib1funcs.S (__udivsi3): Change l.sfeqi
	to l.sfeq and l.sfltsi to l.sflts equivalents as the immediate
	instructions are not available on every processor.  Change a
	l.bnf to l.bf to fix logic issue.

From-SVN: r273648

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 95e73d9..846d201 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2019-07-22  Stafford Horne  <shorne@gmail.com>
 
+       PR target/90362
+       * gcc.target/or1k/div-mul-3.c: New test.
+
+2019-07-22  Stafford Horne  <shorne@gmail.com>
+
        PR target/90363
        * gcc.target/or1k/swap-1.c: New test.
        * gcc.target/or1k/swap-2.c: New test.

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index d5fb54b..0a449a7 100644 (file)
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,11 @@
+2019-07-22  Stafford Horne  <shorne@gmail.com>
+
+       PR target/90362
+       * config/or1k/lib1funcs.S (__udivsi3): Change l.sfeqi
+       to l.sfeq and l.sfltsi to l.sflts equivalents as the immediate
+       instructions are not available on every processor.  Change a
+       l.bnf to l.bf to fix logic issue.
+
 2019-07-04  Iain Sandoe  <iain@sandoe.co.uk>
 
        * config.host: Remove reference to t-darwin8.

diff --git a/libgcc/config/or1k/lib1funcs.S b/libgcc/config/or1k/lib1funcs.S
index d210392..6d05897 100644 (file)
--- a/libgcc/config/or1k/lib1funcs.S
+++ b/libgcc/config/or1k/lib1funcs.S
@@ -68,18 +68,18 @@ __udivmodsi3_internal:
           is not clobbered by this routine, and use that as to
           save a return address without creating a stack frame.  */
 
-       l.sfeqi         r4, 0           /* division by zero; return 0.  */
+       l.sfeq          r4, r0          /* division by zero; return 0.  */
        l.ori           r11, r0, 0      /* initial quotient */
        l.bf            9f
         l.ori          r12, r3, 0      /* initial remainder */
 
        /* Given X/Y, shift Y left until Y >= X.  */
        l.ori           r6, r0, 1       /* mask = 1 */
-1:     l.sfltsi        r4, 0           /* y has msb set */
+1:     l.sflts         r4, r0          /* y has msb set */
        l.bf            2f
         l.sfltu        r4, r12         /* y < x */
        l.add           r4, r4, r4      /* y <<= 1 */
-       l.bnf           1b
+       l.bf            1b
         l.add          r6, r6, r6      /* mask <<= 1 */
 
        /* Shift Y back to the right again, subtracting from X.  */