From 9f0682fe89d9bb1107239411dc555d4063543ce0 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Thu, 9 May 2013 04:32:55 +0000 Subject: [PATCH] * ppc-opc.c (extract_vlesi): Properly sign extend. (extract_vlensi): Likewise. Comment reason for setting invalid. --- opcodes/ChangeLog | 5 +++++ opcodes/ppc-opc.c | 9 +++------ 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 88f9294..e918abc 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,8 @@ +2013-05-09 Alan Modra + + * ppc-opc.c (extract_vlesi): Properly sign extend. + (extract_vlensi): Likewise. Comment reason for setting invalid. + 2013-05-02 Nick Clifton * msp430-dis.c: Add support for MSP430X instructions. diff --git a/opcodes/ppc-opc.c b/opcodes/ppc-opc.c index 80dfa24..62edf02 100644 --- a/opcodes/ppc-opc.c +++ b/opcodes/ppc-opc.c @@ -2022,11 +2022,8 @@ extract_vlesi (unsigned long insn, ppc_cpu_t dialect ATTRIBUTE_UNUSED, int *invalid ATTRIBUTE_UNUSED) { - /* RWRW Because I don't know how to make int be 16 and long be 32 */ - /* I can't rely on casting an int to long to get sign extension. */ long value = ((insn >> 10) & 0xf800) | (insn & 0x7ff); - if (value & 0x8000) - value |= 0xffff0000; + value = (value ^ 0x8000) - 0x8000; return value; } @@ -2045,8 +2042,8 @@ extract_vlensi (unsigned long insn, int *invalid ATTRIBUTE_UNUSED) { long value = ((insn >> 10) & 0xf800) | (insn & 0x7ff); - if (value & 0x8000) - value |= 0xffff0000; + value = (value ^ 0x8000) - 0x8000; + /* Don't use for disassembly. */ *invalid = 1; return -value; } -- 2.7.4