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-rw-r--r--gcc/config/m68hc11/larith.asm258
1 files changed, 190 insertions, 68 deletions
diff --git a/gcc/config/m68hc11/larith.asm b/gcc/config/m68hc11/larith.asm
index 80b88174737..4d99fac2d25 100644
--- a/gcc/config/m68hc11/larith.asm
+++ b/gcc/config/m68hc11/larith.asm
@@ -1,5 +1,5 @@
/* libgcc routines for M68HC11 & M68HC12.
- Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GNU CC.
@@ -41,11 +41,22 @@ Boston, MA 02111-1307, USA. */
.mode mlong
#endif
-#if defined(__USE_RTC__) && defined(mc68hc12)
+ .macro declare_near name
+ .globl \name
+ .type \name,@function
+ .size \name,.Lend-\name
+\name:
+ .endm
+
+#if defined(__USE_RTC__)
# define ARG(N) N+1
.macro ret
+#if defined(mc68hc12)
rtc
+#else
+ jmp __return_32
+#endif
.endm
.macro declare name
@@ -181,10 +192,10 @@ REG(_.d32)
;; Specific initialization for 68hc11 before the main.
;; Nothing special for a generic routine; Just enable interrupts.
;;
- declare __premain
+ declare_near __premain
clra
tap ; Clear both I and X.
- ret
+ rts
#endif
#ifdef L__exit
@@ -299,7 +310,7 @@ L1:
puly ; Restore Y to return the DST
End:
xgdy
- rts
+ ret
#endif
#endif
@@ -349,7 +360,7 @@ L0:
pulx ; Restore X to return the DST
End:
xgdx
- rts
+ ret
#endif
#endif
@@ -438,10 +449,8 @@ End:
#endif
#ifdef L_negsi2
- .sect .text
- .globl ___negsi2
+ declare_near ___negsi2
-___negsi2:
comb
coma
xgdx
@@ -456,10 +465,8 @@ done:
#endif
#ifdef L_one_cmplsi2
- .sect .text
- .globl ___one_cmplsi2
+ declare_near ___one_cmplsi2
-___one_cmplsi2:
comb
coma
xgdx
@@ -470,10 +477,8 @@ ___one_cmplsi2:
#endif
#ifdef L_ashlsi3
- .sect .text
- .globl ___ashlsi3
+ declare_near ___ashlsi3
-___ashlsi3:
xgdy
clra
andb #0x1f
@@ -492,10 +497,8 @@ Return:
#endif
#ifdef L_ashrsi3
- .sect .text
- .globl ___ashrsi3
+ declare_near ___ashrsi3
-___ashrsi3:
xgdy
clra
andb #0x1f
@@ -515,10 +518,8 @@ Return:
#endif
#ifdef L_lshrsi3
- .sect .text
- .globl ___lshrsi3
+ declare_near ___lshrsi3
-___lshrsi3:
xgdy
clra
andb #0x1f
@@ -537,10 +538,8 @@ Return:
#endif
#ifdef L_lshrhi3
- .sect .text
- .globl ___lshrhi3
+ declare_near ___lshrhi3
-___lshrhi3:
cpx #16
bge Return_zero
cpx #0
@@ -558,10 +557,8 @@ Return_zero:
#endif
#ifdef L_lshlhi3
- .sect .text
- .globl ___lshlhi3
+ declare_near ___lshlhi3
-___lshlhi3:
cpx #16
bge Return_zero
cpx #0
@@ -578,11 +575,48 @@ Return_zero:
rts
#endif
+#ifdef L_rotrhi3
+ declare_near ___rotrhi3
+
+___rotrhi3:
+ xgdx
+ clra
+ andb #0x0f
+ xgdx
+ beq Return
+Loop:
+ tap
+ rorb
+ rora
+ dex
+ bne Loop
+Return:
+ rts
+#endif
+
+#ifdef L_rotlhi3
+ declare_near ___rotlhi3
+
+___rotlhi3:
+ xgdx
+ clra
+ andb #0x0f
+ xgdx
+ beq Return
+Loop:
+ asrb
+ rolb
+ rola
+ rolb
+ dex
+ bne Loop
+Return:
+ rts
+#endif
+
#ifdef L_ashrhi3
- .sect .text
- .globl ___ashrhi3
+ declare_near ___ashrhi3
-___ashrhi3:
cpx #16
bge Return_minus_1_or_zero
cpx #0
@@ -605,10 +639,8 @@ Return_zero:
#endif
#ifdef L_ashrqi3
- .sect .text
- .globl ___ashrqi3
+ declare_near ___ashrqi3
-___ashrqi3:
cmpa #8
bge Return_minus_1_or_zero
tsta
@@ -630,10 +662,8 @@ Return_zero:
#endif
#ifdef L_lshlqi3
- .sect .text
- .globl ___lshlqi3
+ declare_near ___lshlqi3
-___lshlqi3:
cmpa #8
bge Return_zero
tsta
@@ -653,8 +683,7 @@ Return_zero:
#ifndef mc68hc12
/* 68HC12 signed divisions are generated inline (idivs). */
- .sect .text
- .globl __divmodhi4
+ declare_near __divmodhi4
;
;; D = numerator
@@ -663,7 +692,6 @@ Return_zero:
;; Result: D = D / X
;; X = D % X
;;
-__divmodhi4:
tsta
bpl Numerator_pos
comb ; D = -D <=> D = (~D) + 1
@@ -721,8 +749,7 @@ Numerator_neg_denominator_pos:
#endif
#ifdef L_mulqi3
- .sect .text
- .globl __mulqi3
+ declare_near ___mulqi3
;
; short __mulqi3(signed char a, signed char b);
@@ -732,7 +759,6 @@ Numerator_neg_denominator_pos:
;
; returns the signed result of A * B in register D.
;
-__mulqi3:
tsta
bmi A_neg
tstb
@@ -759,8 +785,7 @@ AB_neg:
#endif
#ifdef L_mulhi3
- .sect .text
- .globl ___mulhi3
+ declare_near ___mulhi3
;
;
@@ -769,7 +794,6 @@ AB_neg:
; a = register D
; b = register X
;
-___mulhi3:
#ifdef mc68hc12
pshx ; Preserve X
exg x,y
@@ -805,24 +829,6 @@ ___mulhi3:
; ---
; 91 cycles
#else
- stx _.tmp ; (4/5)
- pshb ; (3)
- ldab _.tmp+1 ; (3/4)
- mul ; (10) B.high * A.low
- xgdx ; (3)
- pulb ; (4)
- stab _.tmp ; (3/4)
- mul ; (10) B.low * A.high
- abx ; (3)
- ldd _.tmp ; (4/5)
- mul ; (10) B.low * A.low
- stx _.tmp ; (4)
- adda _.tmp+1 ; (4/5)
- rts ; (5) 20/26 bytes
- ; ---
- ; 70/76 cycles
-
-#ifdef OLD_MUL
stx *_.tmp ; (4)
pshb ; (3)
ldab *_.tmp+1 ; (3)
@@ -843,7 +849,6 @@ ___mulhi3:
#endif
#endif
#endif
-#endif
#ifdef L_mulhi32
@@ -879,13 +884,13 @@ ___mulhi3:
; <A-low> 1,x
; <A-high> 0,x
;
- declare __mulhi32
+ declare_near __mulhi32
#ifdef mc68hc12
- ldy ARG(2),sp
+ ldy 2,sp
emul
exg x,y
- ret
+ rts
#else
pshx ; Room for temp value
pshb
@@ -1187,7 +1192,7 @@ dtors_done:
#ifdef L_far_tramp
#ifdef mc68hc12
- .sect .text
+ .sect .tramp,"ax",@progbits
.globl __far_trampoline
;; This is a trampoline used by the linker to invoke a function
@@ -1216,6 +1221,123 @@ __far_trampoline:
; (whose memory bank is mapped due to the
; call to the trampoline).
#endif
+
+#ifdef mc68hc11
+ .sect .tramp,"ax",@progbits
+ .globl __far_trampoline
+
+;; Trampoline generated by gcc for 68HC11:
+;;
+;; pshb
+;; ldab #%page(func)
+;; ldy #%addr(func)
+;; jmp __far_trampoline
+;;
+__far_trampoline:
+ psha ; (2) Save function parameter (high)
+ ;; <Read current page in A>
+ psha ; (2)
+ ;; <Set currenge page from B>
+ pshx ; (4)
+ tsx ; (3)
+ ldab 4,x ; (4) Restore function parameter (low)
+ ldaa 2,x ; (4) Get saved page number
+ staa 4,x ; (4) Save it below return PC
+ pulx ; (5)
+ pula ; (3)
+ pula ; (3) Restore function parameter (high)
+ jmp 0,y ; (4)
+#endif
+#endif
+
+#ifdef L_call_far
+#ifdef mc68hc11
+ .sect .tramp,"ax",@progbits
+ .globl __call_a16
+ .globl __call_a32
+;;
+;; The call methods are used for 68HC11 to support memory bank switching.
+;; Every far call is redirected to these call methods. Its purpose is to:
+;;
+;; 1/ Save the current page on the stack (1 byte to follow 68HC12 call frame)
+;; 2/ Install the new page
+;; 3/ Jump to the real function
+;;
+;; The page switching (get/save) is board dependent. The default provided
+;; here does nothing (just create the appropriate call frame).
+;;
+;; Call sequence (10 bytes, 13 cycles):
+;;
+;; ldx #page ; (3)
+;; ldy #func ; (4)
+;; jsr __call_a16 ; (6)
+;;
+;; Call trampoline (11 bytes, 19 cycles):
+;;
+__call_a16:
+ ;; xgdx ; (3)
+ ;; <Read current page in A> ; (3) ldaa _current_page
+ psha ; (2)
+ ;; <Set current page from B> ; (4) staa _current_page
+ ;; xgdx ; (3)
+ jmp 0,y ; (4)
+
+;;
+;; Call sequence (10 bytes, 14 cycles):
+;;
+;; pshb ; (2)
+;; ldab #page ; (2)
+;; ldy #func ; (4)
+;; jsr __call_a32 ; (6)
+;;
+;; Call trampoline (87 bytes, 57 cycles):
+;;
+__call_a32:
+ pshx ; (4)
+ psha ; (2)
+ ;; <Read current page in A> ; (3) ldaa _current_page
+ psha ; (2)
+ ;; <Set current page from B> ; (4) staa _current_page
+ tsx ; (3)
+ ldab 6,x ; (4) Restore function parameter
+ ldaa 5,x ; (4) Move PC return at good place
+ staa 6,x ; (4)
+ ldaa 4,x ; (4)
+ staa 5,x ; (4)
+ pula ; (3)
+ staa 4,x ; (4)
+ pula ; (3)
+ pulx ; (5)
+ jmp 0,y ; (4)
+#endif
+#endif
+
+#ifdef L_return_far
+#ifdef mc68hc11
+ .sect .tramp,"ax",@progbits
+ .globl __return_void
+ .globl __return_16
+ .globl __return_32
+
+__return_void:
+ ;; pulb
+ ;; <Set current page from B> (Board specific)
+ ;; rts
+__return_16:
+ ;; xgdx
+ ;; pulb
+ ;; <Set current page from B> (Board specific)
+ ;; xgdx
+ ;; rts
+__return_32:
+ ;; xgdy
+ ;; pulb
+ ;; <Set current page from B> (Board specific)
+ ;; xgdy
+ ;; rts
+ ins
+ rts
+#endif
#endif
.Lend:
;-----------------------------------------
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