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binutils-gdb
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For "sub", compute carry by comparing inputs. 

Test.
This commit is contained in:
Andrew Cagney 1997-12-02 07:59:52 +00:00
parent d294a657d5
commit 9d9972a38a
2 changed files with 43 additions and 0 deletions
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1
sim/testsuite/d10v-elf/.Sanitize
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@ -15,6 +15,7 @@ t-msbu.s
t-rachi.s
t-rep.s
t-mulxu.s
t-sub.s
t-subi.s
t-sub2w.s
t-mvtac.s

42
sim/testsuite/d10v-elf/t-sub.s Normal file
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@ -0,0 +1,42 @@
.include "t-macros.i"
start
;; The d10v implements negated addition for subtraction
.macro check_sub s x y r c
;; clear carry
ldi r6,#0x8004
mvtc r6,cr0
;; subtract
ldi r10,#\x
ldi r11,#\y
sub r10, r11
;; verify result
ldi r12, #\r
cmpeq r10, r12
brf0t 1f
ldi r6, 1
ldi r2, #\s
trap 15
1:
;; verify carry
mvfc r6, cr0
and3 r6, r6, #1
cmpeqi r6, #\c
brf0t 1f
ldi r6, 1
ldi r2, #\s
trap 15
1:
.endm
check_sub 1 0x0000 0x0000 0x0000 1
check_sub 2 0x0000 0x0001 0xffff 0
check_sub 3 0x0001 0x0000 0x0001 1
check_sub 4 0x0001 0x0001 0x0000 1
check_sub 5 0x0000 0x8000 0x8000 0
check_sub 6 0x8000 0x0001 0x7fff 1
check_sub 7 0x7fff 0x7fff 0x0000 1
exit0