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-rw-r--r--amforth-6.5/msp430/words/zero-less.asm6
1 files changed, 6 insertions, 0 deletions
diff --git a/amforth-6.5/msp430/words/zero-less.asm b/amforth-6.5/msp430/words/zero-less.asm
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--- /dev/null
+++ b/amforth-6.5/msp430/words/zero-less.asm
@@ -0,0 +1,6 @@
+;C 0< n -- flag true if TOS negative
+ CODEHEADER(XT_ZEROLESS,2,"0<")
+ ADD TOS,TOS ; set cy if TOS negative
+ SUBC TOS,TOS ; TOS=-1 if carry was clear
+ XOR #-1,TOS ; TOS=-1 if carry was set
+ NEXT