Greetings,
This is using the release 1 of the compiler.
We are having problems with a bogus code insertion when calling some
functions particularly when calling the integer multiply or division
library functions.
It apppears to have inserted a bogus function instead of a call to the
multiply function. In all cases, the compiler is disabling interrupts (this
is really bad for this project) while it refreshes R15 with 0x013a, and
then re-enables ints. Why does it disable interrupts, and what is it trying
to do the 0x13a? The calculation is incorrect as a result of this
dint/push/pop r15 operation as there is no multiplication. The <__mulhi3>
library function is missing from the list file.
Here are two examples from the list file of reused code in two projects,
the first is compiled with release 1 (2002-12-17) , the second was compiled
with (2002-09-22). Release 1 appears to completely miss out on doing the
multiply, and inserts the bogus dint/push/R15 manipulation/pop. Anywhere we
have done an integer muliplication and division in release 1, the resultant
assembly code structure is the same.
I would appreciate some clues/comments/help??
Example (a)
x = (SWORD)(input - pBuf[index].c);
c60a: 4f 4b mov.b r11, r15 ;
c60c: 0e 4f mov r15, r14 ;
c60e: 0e 5e rla r14 ;
c610: 0e 5f add r15, r14 ;
c612: 0e 5e rla r14 ;
c614: 0e 59 add r9, r14 ;
c616: 1a 8e 04 00 sub 4(r14), r10 ;
x *= (SWORD)(-pBuf[index].inv_m);
c61a: 5f 4e 02 00 mov.b 2(r14), r15 ;
c61e: 3f e3 inv r15 ;
c620: 1f 53 inc r15 ;
c622: 02 12 push r2 ;
c624: 32 c2 dint
c626: 03 43 nop
c628: 82 4a 32 01 mov r10, &0x0132 ;
c62c: 82 4f 38 01 mov r15, &0x0138 ;
c630: 1f 42 3a 01 mov &0x013a,r15 ;src addr 0x013a
c634: 32 41 pop SR ;
x /= (SWORD)(pBuf[index].scale);
c636: 5e 4e 03 00 mov.b 3(r14), r14 ;
c63a: 0c 4f mov r15, r12 ;
c63c: 0a 4e mov r14, r10 ;
c63e: b0 12 1e c9 call #-14050 ;#0xc91e
c642: 0f 4c mov r12, r15 ;
0000c91e <__divmodhi4>:
Example (b)
x = (SWORD)input - pBuf[index].c;
ed28: 4d 4a mov.b r10, r13 ;
ed2a: 4e 4b mov.b r11, r14 ;
ed2c: 0f 4e mov r14, r15 ;
ed2e: 0f 5f rla r15 ;
ed30: 0f 5e add r14, r15 ;
ed32: 0f 5f rla r15 ;
ed34: 0f 59 add r9, r15 ;
ed36: 1d 8f 04 00 sub 4(r15), r13 ;
x *= (SWORD)pBuf[index].inv_m;
ed3a: 5e 4f 01 00 mov.b 1(r15), r14 ;
ed3e: 8e 11 sxt r14 ;
ed40: 0a 4d mov r13, r10 ;
ed42: 0c 4e mov r14, r12 ;
ed44: b0 12 8e f8 call #-1906 ;#0xf88e
x /= (SWORD)pBuf[index].scale;
ed48: 5f 4f 02 00 mov.b 2(r15), r15 ;
ed4c: 0c 4e mov r14, r12 ;
ed4e: 0a 4f mov r15, r10 ;
ed50: b0 12 dc f8 call #-1828 ;#0xf8dc
ed54: 0f 4c mov r12, r15 ;
0000f88e <__mulhi3>:
0000f8dc <__divmodhi4>:
Phil Hancock
Australia
