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[sim/msp430] support 32-bit sign extension

Message ID 201405122306.s4CN6F4J010614@greed.delorie.com
State Committed
Headers

Commit Message

DJ Delorie May 12, 2014, 11:06 p.m. UTC 
  Needed for the hardware multiply unit.  Committed.

	* msp43-sim.c (sign_ext): Change to "long long" to support
	sign-extending 32-bit values.
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Patch

diff --git a/sim/msp430/msp430-sim.c b/sim/msp430/msp430-sim.c
index 693fdee..2dcbae3 100644
--- a/sim/msp430/msp430-sim.c
+++ b/sim/msp430/msp430-sim.c
@@ -337,11 +337,11 @@  zero_ext (unsigned int v, unsigned int bits)
   return v;
 }
 
-static signed int
-sign_ext (signed int v, unsigned int bits)
+static signed long long
+sign_ext (signed long long v, unsigned int bits)
 {
-  int sb = 1 << (bits-1);	/* Sign bit.  */
-  int mb = (1 << (bits-1)) - 1; /* Mantissa bits.  */
+  signed long long sb = 1LL << (bits-1);	/* Sign bit.  */
+  signed long long mb = (1LL << (bits-1)) - 1LL; /* Mantissa bits.  */
 
   if (v & sb)
     v = v | ~mb;