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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
This commit is contained in:
Stafford Horne 2019-07-21 20:59:50 +00:00 committed by Stafford Horne
parent 2e92185a03
commit 9c0dba7c45
3 changed files with 16 additions and 3 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
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

8
libgcc/ChangeLog
View File

@ -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.

6
libgcc/config/or1k/lib1funcs.S
View File

@ -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. */