mpr: fix a compiler error on PowerPC

[Steven Edwards]

---------- Forwarded message ----------
From: art yerkes <art.yer...@gmail.com>
Date: 2009/1/9
Subject: Re: mpr: fix a compiler error on PowerPC
To: Steven Edwards <winehac...@gmail.com>
According to Art Yerkes who has a copy of PPC VC++

"Here's what I get.  The first test (char) works identically to the
second test (signed char), so the default has to be signed."


-- 
Steven Edwards

"There is one thing stronger than all the armies in the world, and
that is an idea whose time has come." - Victor Hugo

const char a = 'a';
const signed char signed_a = 'a';
const unsigned char unsigned_a = 'a';

void bar();

int foo()
{
        if (a < 0) bar();
        if (signed_a < 0) bar();
        if (unsigned_a < 0) bar();
}

testsign.obj
Description: Binary data

testsign.b:     file format binary


Disassembly of section .data:

00000000 <.data>:
   0:   00 00 4b 89     lbz     r10,0(r11)
   4:   75 07 49 7d     extsb.  r9,r10
   8:   08 00 80 40     bge-    0x10
   c:   e5 ff ff 4b     bl      0xfffffff0
  10:   00 00 00 3d     lis     r8,0
  14:   00 00 e8 88     lbz     r7,0(r8)
  18:   75 07 e6 7c     extsb.  r6,r7
  1c:   08 00 80 40     bge-    0x24
  20:   d1 ff ff 4b     bl      0xfffffff0
  24:   00 00 a0 3c     lis     r5,0
  28:   00 00 85 88     lbz     r4,0(r5)
  2c:   3f 06 83 54     clrlwi. r3,r4,24
  30:   08 00 80 40     bge-    0x38
  34:   bd ff ff 4b     bl      0xfffffff0
  38:   40 00 21 38     addi    r1,r1,64
  3c:   a6 03 e8 7f     mtlr    r31
  40:   fc ff e1 83     lwz     r31,-4(r1)
  44:   20 00 80 4e     blr