michael@0: 
michael@0: /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "xptcprivate.h"
michael@0: 
michael@0: #if _HPUX
michael@0: #error "This code is for HP-PA RISC 32 bit mode only"
michael@0: #endif
michael@0: 
michael@0: #include <alloca.h>
michael@0: 
michael@0: typedef unsigned nsXPCVariant;
michael@0: 
michael@0: extern "C" int32_t
michael@0: invoke_count_bytes(nsISupports* that, const uint32_t methodIndex,
michael@0:   const uint32_t paramCount, const nsXPTCVariant* s)
michael@0: {
michael@0:   int32_t result = 4; /* variant records do not include self pointer */
michael@0: 
michael@0:   /* counts the number of bytes required by the argument stack,
michael@0:      64 bit integer, and double requires 8 bytes.  All else requires
michael@0:      4 bytes.
michael@0:    */
michael@0: 
michael@0:   {
michael@0:     uint32_t indx;
michael@0:     for (indx = paramCount; indx > 0; --indx, ++s)
michael@0:     {
michael@0:       if (! s->IsPtrData())
michael@0:       {
michael@0:         if (s->type == nsXPTType::T_I64 || s->type == nsXPTType::T_U64 ||
michael@0:             s->type == nsXPTType::T_DOUBLE)
michael@0:         {
michael@0:           /* 64 bit integer and double aligned on 8 byte boundaries */
michael@0:           result += (result & 4) + 8;
michael@0:           continue;
michael@0:         }
michael@0:       }
michael@0:       result += 4; /* all other cases use 4 bytes */
michael@0:     }
michael@0:   }
michael@0:   result -= 72; /* existing stack buffer is 72 bytes */
michael@0:   if (result < 0)
michael@0:     return 0;
michael@0:   {
michael@0:     /* round up to 64 bytes boundary */
michael@0:     int32_t remainder = result & 63;
michael@0:     return (remainder == 0) ? result : (result + 64 - remainder);
michael@0:   }
michael@0: }
michael@0: 
michael@0: extern "C" uint32_t
michael@0: invoke_copy_to_stack(uint32_t* d,
michael@0:   const uint32_t paramCount, nsXPTCVariant* s)
michael@0: {
michael@0: 
michael@0:   typedef struct
michael@0:   {
michael@0:     uint32_t hi;
michael@0:     uint32_t lo;
michael@0:   } DU;
michael@0: 
michael@0:   uint32_t* dest = d;
michael@0:   nsXPTCVariant* source = s;
michael@0:   /* we clobber param vars by copying stuff on stack, have to use local var */
michael@0: 
michael@0:   uint32_t floatflags = 0;
michael@0:   /* flag indicating which floating point registers to load */
michael@0: 
michael@0:   uint32_t regwords = 1; /* register 26 is reserved for ptr to 'that' */
michael@0:   uint32_t indx;
michael@0: 
michael@0:   for (indx = paramCount; indx > 0; --indx, --dest, ++source)
michael@0:   {
michael@0:     if (source->IsPtrData())
michael@0:     {
michael@0:       *((void**) dest) = source->ptr;
michael@0:       ++regwords;
michael@0:       continue;
michael@0:     }
michael@0:     switch (source->type)
michael@0:     {
michael@0:     case nsXPTType::T_I8    : *((int32_t*) dest) = source->val.i8;  break;
michael@0:     case nsXPTType::T_I16   : *((int32_t*) dest) = source->val.i16; break;
michael@0:     case nsXPTType::T_I32   : *((int32_t*) dest) = source->val.i32; break;
michael@0:     case nsXPTType::T_I64   :
michael@0:     case nsXPTType::T_U64   :
michael@0:       if (regwords & 1)
michael@0:       {
michael@0:         /* align on double word boundary */
michael@0:         --dest;
michael@0:         ++regwords;
michael@0:       }
michael@0:       *((uint32_t*) dest) = ((DU *) source)->lo;
michael@0:       *((uint32_t*) --dest) = ((DU *) source)->hi;
michael@0:       /* big endian - hi word in low addr */
michael@0:       regwords += 2;
michael@0:       continue;
michael@0:     case nsXPTType::T_DOUBLE :
michael@0:       if (regwords & 1)
michael@0:       {
michael@0:         /* align on double word boundary */
michael@0:         --dest;
michael@0:         ++regwords;
michael@0:       }
michael@0:       switch (regwords) /* load double precision float register */
michael@0:       {
michael@0:       case 2:
michael@0:         floatflags |= 1;
michael@0:       }
michael@0:       *((uint32_t*) dest) = ((DU *) source)->lo;
michael@0:       *((uint32_t*) --dest) = ((DU *) source)->hi;
michael@0:       /* big endian - hi word in low addr */
michael@0:       regwords += 2;
michael@0:       continue;
michael@0:     case nsXPTType::T_FLOAT :
michael@0:       switch (regwords) /* load single precision float register */
michael@0:       {
michael@0:       case 1:
michael@0:         floatflags |= 2;
michael@0:         break;
michael@0:       case 2:
michael@0:         floatflags |= 4;
michael@0:         break;
michael@0:       case 3:
michael@0:         floatflags |= 8;
michael@0:       }
michael@0:       *((float*) dest) = source->val.f;
michael@0:       break;
michael@0:     case nsXPTType::T_U8    : *((uint32_t*) (dest)) = source->val.u8; break;
michael@0:     case nsXPTType::T_U16   : *((uint32_t*) (dest)) = source->val.u16; break;
michael@0:     case nsXPTType::T_U32   : *((uint32_t*) (dest)) = source->val.u32; break;
michael@0:     case nsXPTType::T_BOOL  : *((uint32_t*) (dest)) = source->val.b; break;
michael@0:     case nsXPTType::T_CHAR  : *((uint32_t*) (dest)) = source->val.c; break;
michael@0:     case nsXPTType::T_WCHAR : *((int32_t*)  (dest)) = source->val.wc; break;
michael@0: 
michael@0:     default:
michael@0:       // all the others are plain pointer types
michael@0:       *((void**) dest) = source->val.p;
michael@0:     }
michael@0:     ++regwords;
michael@0:   }
michael@0:   return floatflags;
michael@0: }
michael@0: