SBC/CPC: Fix Calculation of Zero Flag

For the Sub/Compare with carry, the old Z flag is also used to
AND the newZ:

  newZ = (result==0) & oldZ

avr.instr.tex

@@ -225,9 +225,12 @@
   \avr@reg@get{1#5#6#7#8}{\avr@Rd}%
   \def\avr@Rr{#1#2#3#4#9}%
   \avr@flag@get C \@@carry%
+  \avr@flag@get Z \@@oldZ%
   \xdef \avr@instr@extracarry {\avr@bit@negate \@@carry}%
   \avr@debug{SBCI - \%#2#3#4#5#6 <- #2#3#4#5#6(=\avr@Rd) - \avr@Rr -\@@carry}%
   \csuse{avr@instr@subber@helper}%
+  \avr@flag@get Z \@@newZ%
+  \avr@flag@set Z {\avr@bit@and \@@oldZ \@@newZ}%
   % Set the result register
   \avr@reg@set{\avr@Rx}{1#5#6#7#8}%
   \avr@pc@inc%
@@ -251,9 +254,12 @@
   \avr@reg@get{#1#7}{\avr@Rr}%
   \avr@reg@get{#2#3#4#5#6}{\avr@Rd}%
   \avr@flag@get C \@@carry%
+  \avr@flag@get Z \@@oldZ%
   \xdef \avr@instr@extracarry {\avr@bit@negate \@@carry}%
-  \avr@debug{CPC - #2#3#4#5#6(=\avr@Rd) - \%#1#7(=\avr@Rr)}%
+  \avr@debug{CPC - #2#3#4#5#6(=\avr@Rd) - \%#1#7(=\avr@Rr) - \@@carry}%
   \csuse{avr@instr@subber@helper}%
+  \avr@flag@get Z \@@newZ%
+  \avr@flag@set Z {\avr@bit@and \@@oldZ \@@newZ}%
   % Do not set the output register
   \avr@pc@inc%
 }
@@ -415,8 +421,9 @@
   }%
   \avr@flag@set C {\@@and {\@@not \@@X} \@@D}%
   \avr@flag@set N \@@X%
-  \avr@flag@set V {\@@and {\@@not \@@D} \@@X}%
+  \edef\@@V{\@@and {\@@not \@@D} \@@X}%
-  \avr@flag@set S {\@@xor \@@X {\@@and {\@@not \@@D} \@@X}}%
+  \avr@flag@set V \@@V%
+  \avr@flag@set S {\@@xor \@@X \@@V}%
   % Set the Result
   \avr@regw@set{\avr@Rx}{11#3#4}%
   \avr@pc@inc%

avr.testsuite.tex

@@ -34,6 +34,7 @@
     }{%
     \avr@error{UDR unequal: #1 != \avr@UDR}%
   }%
+  \def\avr@UDR{}%
 }
 
 % Hook Macro for the tests

tests/float.c

@@ -17,31 +17,25 @@ int
 main(void)
 {
     stdout = &mystdout;
-    printf("Hello, world!");
 
+    volatile float a = 0.23;
+    volatile float b = 0.43;
+
+    printf("%.2f", 1/ (a * b * 3));
     asm volatile("break;");
 
-
-    volatile float foo = 0.23;
-    printf("%.2f", foo);
-
-    asm volatile("break;");
-
-
     return 0;
 }
 
 
 /**
-   check-name: Print to Stdout and Float
+   check-name: Calculate with floats
+   compiler-opts: -Wl,-u,vfprintf -lm -lprintf_flt
+
    check-start:
 
    \avr@instr@stepn{100000}
-   \avr@test@UDR{Hello, world!}
+   \avr@test@UDR{3.37}
-   \xdef\avr@UDR{}
 
-   \avr@instr@stepn{100000}
-   \avr@test@UDR{0.23}
-   \def\avr@UDR{}
    check-end:
 **/

tests/mul.c

@@ -17,8 +17,11 @@ int main() {
   volatile uint16_t y = 55;
 
   foo[5] = x * y;
+  foo[20] = 165;
+
+  itoa((unsigned char)foo[20], &foo[6], 10);
+  itoa((signed char)foo[20], &foo[9], 10);
 
-  itoa(165, &foo[6], 10);
 
   asm volatile ("break");
 }
@@ -41,5 +44,9 @@ int main() {
   \avr@test@MEM{103}{00110110} % '6'
   \avr@test@MEM{104}{00110101} % '5'
 
+  \avr@test@MEM{105}{00101101} % '-'
+  \avr@test@MEM{106}{00111001} % '9'
+  \avr@test@MEM{107}{00110001} % '1'
+
   check-end:
 */

tests/printf.c

@@ -1,20 +1,47 @@
 #include <avr/io.h>
 #include <stdio.h>
 
-volatile char buffer[30];
+char buffer[30];
+
+volatile char buf[3];
+
+static int uart_putchar(char c, FILE *stream);
+static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL,
+                                         _FDEV_SETUP_WRITE);
+static int
+uart_putchar(char c, FILE *stream)
+{
+    UDR = c;
+    return 0;
+}
 
-volatile uint16_t xxx = 165;
 
 int
 main(void)
 {
-    asm volatile("break;");
+    stdout = &mystdout;
+
+    buf[0] = 'x';
+    buf[1] = 'y';
+    buf[2] = '\0';
+
+    puts(buf);
 
-    // sprintf(buffer, "%d", xxx);
-    __ultoa_invert(xxx, buffer, 10);
 
     asm volatile("break;");
 
+    printf(":%c", buf[0]);
+
+    asm volatile("break;");
+
+    printf(":%d:", buf[1]);
+
+    asm volatile("break;");
+
+    volatile float x=0.23;
+    printf(":%.2f:", x);
+
+    asm volatile("break;");
 
     return 0;
 }
@@ -22,15 +49,21 @@ main(void)
 
 /**
    check-name: Print to Stdout
+   compiler-opts: -Wl,-u,vfprintf -lm -lprintf_flt
    check-start:
 
    \avr@instr@stepn{100000}
-   \avr@instr@executed=0
+   \avr@test@UDR{xy^10} % ^10 == \n
-   \avr@instr@stepn{100000}
+   \def\avr@UDR{}
 
-   \avr@test@MEM{96}{00110001} % '1'
+   \avr@instr@stepn{100000}
-   \avr@test@MEM{97}{00110110} % '6'
+   \avr@test@UDR{:x}
-   \avr@test@MEM{98}{00110101} % '5'   
+
+   \avr@instr@stepn{100000}
+   \avr@test@UDR{:121:}
+
+   \avr@instr@stepn{100000}
+   \avr@test@UDR{:0.23:}
 
    check-end:
 **/

tests/shift.c

@@ -0,0 +1,26 @@
+#include <avr/io.h>
+
+volatile char foo[30];
+
+int main() {
+  foo[0] = 5;
+  foo[1] = 42;
+  foo[2] = foo[1] >> foo[0];
+  foo[3] = foo[1] << (foo[0]>>2);
+
+
+  asm volatile ("break");
+}
+
+/*
+  check-name: Shift Operations
+  check-start:
+  \avr@instr@stepn{1000}
+
+  \avr@test@MEM{96}{00000101} % 5
+  \avr@test@MEM{97}{00101010} % 42
+  \avr@test@MEM{98}{00000001} % 0
+  \avr@test@MEM{99}{01010100} % 42
+
+  check-end:
+*/

tests/test-suite

@@ -96,7 +96,8 @@ do_test()
 	echo -n "TEST    $test_name ($file)"
 
     cp HEADER "$file".tex
-    echo "\avrloadc[-lm -Os -mmcu=atmega8]{$file}" >> "$file".tex
+    get_value compiler-opts "$file"
+    echo "\avrloadc[-Os -mmcu=atmega8 $last_result]{$file}" >> "$file".tex
 
 	awk '/check-start/,/check-end/ {print}' $file \
 		| egrep -v 'check-(start|end)' >> "$file".tex
@@ -120,7 +121,8 @@ do_test()
 		test_failed=1
     else
         get_value BREAK "$file".output
-        echo " ($last_result)"
+        echo " ($last_result)" | sed 's/ instructions//' | tr -d "\n"
+        echo 
 	fi
 
 	if [ "$test_failed" -eq "1" ]; then