lib1funcs.asm (divnorm): Store the sign in bit 3 of S2L.

	* config/h8300/lib1funcs.asm (divnorm): Store the sign in bit
	3 of S2L.
	(modnorm): Likewise.
	(exitdiv): Look at bit 3 of S2L only.

From-SVN: r73635

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e6937a6c59caedc58c86d35a45a40a45d8700e40..161f2ba03c0a717635b7df61fb0cfea8d8303aea 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-11-15  Kazu Hirata  <kazu@cs.umass.edu>
+
+       * config/h8300/lib1funcs.asm (divnorm): Store the sign in bit
+       3 of S2L.
+       (modnorm): Likewise.
+       (exitdiv): Look at bit 3 of S2L only.
+
 2003-11-15  Kazu Hirata  <kazu@cs.umass.edu>
 
        * config/h8300/h8300.h (DO_GLOBAL_CTORS_BODY): Fix warnings.

diff --git a/gcc/config/h8300/lib1funcs.asm b/gcc/config/h8300/lib1funcs.asm
index 744d402d19bc0f8d6ab84e146f80c86c4e5bac97..381b764be58444a999c4cb826d551e9bd396ada2 100644 (file)
--- a/gcc/config/h8300/lib1funcs.asm
+++ b/gcc/config/h8300/lib1funcs.asm
@@ -323,8 +323,8 @@ setbit:     inc     A0L             ; do insert bit
 #ifdef __H8300__
 
 divnorm:
-       mov.b   #0,S2L          ; keep the sign in S2
        mov.b   A0H,A0H         ; is the numerator -ve
+       stc     ccr,S2L         ; keep the sign in bit 3 of S2L
        bge     postive
 
        ; negate arg
@@ -337,8 +337,6 @@ divnorm:
        addx    #0,A1H
        addx    #0,A0L
        addx    #0,A0H
-
-       mov.b   #1,S2L          ; the sign will be -ve
 postive:
        mov.b   A2H,A2H         ; is the denominator -ve
        bge     postive2
@@ -350,15 +348,15 @@ postive:
        addx    #0,A3H
        addx    #0,A2L
        addx    #0,A2H
-       xor     #1,S2L          ; toggle result sign
+       xor.b   #0x08,S2L       ; toggle the result sign
 postive2:
        rts
 
 ;; Basically the same, except that the sign of the divisor determines
 ;; the sign.
 modnorm:
-       mov.b   #0,S2L          ; keep the sign in S2
        mov.b   A0H,A0H         ; is the numerator -ve
+       stc     ccr,S2L         ; keep the sign in bit 3 of S2L
        bge     mpostive
 
        ; negate arg
@@ -371,8 +369,6 @@ modnorm:
        addx    #0,A1H
        addx    #0,A0L
        addx    #0,A0H
-
-       mov.b   #1,S2L          ; the sign will be -ve
 mpostive:
        mov.b   A2H,A2H         ; is the denominator -ve
        bge     mpostive2
@@ -390,19 +386,18 @@ mpostive2:
 #else /* __H8300H__ */
 
 divnorm:
-       mov.b   #0,S2L          ; keep the sign in S2
        mov.l   A0P,A0P         ; is the numerator -ve
+       stc     ccr,S2L         ; keep the sign in bit 3 of S2L
        bge     postive
 
        neg.l   A0P             ; negate arg
-       mov.b   #1,S2L          ; the sign will be -ve
 
 postive:
        mov.l   A1P,A1P         ; is the denominator -ve
        bge     postive2
 
        neg.l   A1P             ; negate arg
-       xor.b   #1,S2L          ; toggle result sign
+       xor.b   #0x08,S2L       ; toggle the result sign
 
 postive2:
        rts
@@ -410,12 +405,11 @@ postive2:
 ;; Basically the same, except that the sign of the divisor determines
 ;; the sign.
 modnorm:
-       mov.b   #0,S2L          ; keep the sign in S2
        mov.l   A0P,A0P         ; is the numerator -ve
+       stc     ccr,S2L         ; keep the sign in bit 3 of S2L
        bge     mpostive
 
        neg.l   A0P             ; negate arg
-       mov.b   #1,S2L          ; the sign will be -ve
 
 mpostive:
        mov.l   A1P,A1P         ; is the denominator -ve
@@ -493,7 +487,7 @@ ___divsi3:
 
        ; examine what the sign should be
 exitdiv:
-       or      S2L,S2L
+       btst    #3,S2L
        beq     reti
 
        ; should be -ve