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$NetBSD: patch-xl,v 1.5 2012/09/02 06:43:44 ryoon Exp $
NetBSD ppc xptcall support code. Originally from pkgsrc/www/mozilla.
--- mozilla/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc_netbsd.s.orig 2012-08-25 00:31:35.000000000 +0000
+++ mozilla/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc_netbsd.s
@@ -20,41 +20,41 @@
.section ".text"
.align 2
- .globl XPTC_InvokeByIndex
- .type XPTC_InvokeByIndex,@function
+ .globl NS_InvokeByIndex_P
+ .type NS_InvokeByIndex_P,@function
-#
-# XPTC_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
-# PRUint32 paramCount, nsXPTCVariant* params)
-#
-
-XPTC_InvokeByIndex:
- stwu sp,-32(sp) # setup standard stack frame
- mflr r0 # save LR
- stw r3,8(sp) # r3 <= that
- stw r4,12(sp) # r4 <= methodIndex
+//
+// NS_InvokeByIndex_P(nsISupports* that, PRUint32 methodIndex,
+// PRUint32 paramCount, nsXPTCVariant* params)
+//
+
+NS_InvokeByIndex_P:
+ stwu sp,-32(sp) // setup standard stack frame
+ mflr r0 // save LR
+ stw r3,8(sp) // r3 <= that
+ stw r4,12(sp) // r4 <= methodIndex
stw r30,16(sp)
stw r31,20(sp)
- stw r0,36(sp) # store LR backchain
+ stw r0,36(sp) // store LR backchain
mr r31,sp
- rlwinm r10,r5,3,0,27 # r10 = (ParamCount * 2 * 4) & ~0x0f
- addi r0,r10,96 # reserve stack for GPR and FPR register save area r0 = r10 + 96
- lwz r9,0(sp) # r9 = backchain
+ rlwinm r10,r5,3,0,27 // r10 = (ParamCount * 2 * 4) & ~0x0f
+ addi r0,r10,96 // reserve stack for GPR and FPR register save area r0 = r10 + 96
+ lwz r9,0(sp) // r9 = backchain
neg r0,r0
- stwux r9,sp,r0 # reserve stack sapce and save SP backchain
+ stwux r9,sp,r0 // reserve stack sapce and save SP backchain
- addi r3,sp,8 # r3 <= args
- mr r4,r5 # r4 <= paramCount
- mr r5,r6 # r5 <= params
- add r6,r3,r10 # r6 <= gpregs ( == args + r10 )
- mr r30,r6 # store in r30 for use later...
- addi r7,r6,32 # r7 <= fpregs ( == gpregs + 32 )
+ addi r3,sp,8 // r3 <= args
+ mr r4,r5 // r4 <= paramCount
+ mr r5,r6 // r5 <= params
+ add r6,r3,r10 // r6 <= gpregs ( == args + r10 )
+ mr r30,r6 // store in r30 for use later...
+ addi r7,r6,32 // r7 <= fpregs ( == gpregs + 32 )
- bl invoke_copy_to_stack@local # (args, paramCount, params, gpregs, fpregs)
+ bl invoke_copy_to_stack@local // (args, paramCount, params, gpregs, fpregs)
- lfd f1,32(r30) # load FP registers with method parameters
+ lfd f1,32(r30) // load FP registers with method parameters
lfd f2,40(r30)
lfd f3,48(r30)
lfd f4,56(r30)
@@ -63,18 +63,13 @@ XPTC_InvokeByIndex:
lfd f7,80(r30)
lfd f8,88(r30)
- lwz r3,8(r31) # r3 <= that
- lwz r4,12(r31) # r4 <= methodIndex
- lwz r5,0(r3) # r5 <= vtable ( == *that )
- slwi r4,r4,3 # convert to offset ( *= 8 )
- addi r4,r4,8 # skip first two vtable entries
- add r4,r4,r5
- lhz r0,0(r4) # virtual base offset
- extsh r0,r0
- add r3,r3,r0
- lwz r0,4(r4) # r0 <= methodpointer ( == vtable + offset )
+ lwz r3,8(r31) // r3 <= that
+ lwz r4,12(r31) // r4 <= methodIndex
+ lwz r5,0(r3) // r5 <= vtable ( == *that )
+ slwi r4,r4,2 // convert to offset ( *= 4 )
+ lwzx r0,r4,r5 // r0 <= methodpointer ( == vtable + offset )
- lwz r4,4(r30) # load GP regs with method parameters
+ lwz r4,4(r30) // load GP regs with method parameters
lwz r5,8(r30)
lwz r6,12(r30)
lwz r7,16(r30)
@@ -82,13 +77,13 @@ XPTC_InvokeByIndex:
lwz r9,24(r30)
lwz r10,28(r30)
- mtlr r0 # copy methodpointer to LR
- blrl # call method
+ mtlr r0 // copy methodpointer to LR
+ blrl // call method
- lwz r30,16(r31) # restore r30 & r31
+ lwz r30,16(r31) // restore r30 & r31
lwz r31,20(r31)
- lwz r11,0(sp) # clean up the stack
+ lwz r11,0(sp) // clean up the stack
lwz r0,4(r11)
mtlr r0
mr sp,r11
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