Back to index

lightning-sunbird  0.9+nobinonly
Defines | Functions | Variables
xptcinvoke_openbsd_amd64.cpp File Reference
#include "xptcprivate.h"

Go to the source code of this file.


#define ARG_FPR(N)   case N+1: d##N = fpregs[N];
#define ARG_GPR(N)   case N+1: a##N = gpregs[N];


static void invoke_count_words (PRUint32 paramCount, nsXPTCVariant *s, PRUint32 &nr_gpr, PRUint32 &nr_fpr, PRUint32 &nr_stack)
static void invoke_copy_to_stack (PRUint64 *d, PRUint32 paramCount, nsXPTCVariant *s, PRUint64 *gpregs, double *fpregs)
 XPTC_InvokeByIndex (nsISupports *that, PRUint32 methodIndex, PRUint32 paramCount, nsXPTCVariant *params)


const PRUint32 GPR_COUNT = 6
const PRUint32 FPR_COUNT = 8

Define Documentation

#define ARG_FPR (   N)    case N+1: d##N = fpregs[N];
#define ARG_GPR (   N)    case N+1: a##N = gpregs[N];

Function Documentation

static void invoke_copy_to_stack ( PRUint64 d,
PRUint32  paramCount,
nsXPTCVariant s,
PRUint64 gpregs,
double *  fpregs 
) [static]

Definition at line 77 of file xptcinvoke_openbsd_amd64.cpp.

    PRUint32 nr_gpr = 1; // skip one GP register for 'that'
    PRUint32 nr_fpr = 0;
    PRUint64 value;

    for (uint32 i = 0; i < paramCount; i++, s++) {
        if (s->IsPtrData())
            value = (PRUint64) s->ptr;
        else {
            switch (s->type) {
            case nsXPTType::T_FLOAT:                                break;
            case nsXPTType::T_DOUBLE:                               break;
            case nsXPTType::T_I8:     value = s->val.i8;            break;
            case nsXPTType::T_I16:    value = s->val.i16;           break;
            case nsXPTType::T_I32:    value = s->val.i32;           break;
            case nsXPTType::T_I64:    value = s->val.i64;           break;
            case nsXPTType::T_U8:     value = s->val.u8;            break;
            case nsXPTType::T_U16:    value = s->val.u16;           break;
            case nsXPTType::T_U32:    value = s->val.u32;           break;
            case nsXPTType::T_U64:    value = s->val.u64;           break;
            case nsXPTType::T_BOOL:   value = s->val.b;             break;
            case nsXPTType::T_CHAR:   value = s->val.c;             break;
            case nsXPTType::T_WCHAR:  value = s->val.wc;            break;
            default:                  value = (PRUint64) s->val.p;  break;

        if (!s->IsPtrData() && s->type == nsXPTType::T_DOUBLE) {
            if (nr_fpr < FPR_COUNT)
                fpregs[nr_fpr++] = s->val.d;
            else {
                *((double *)d) = s->val.d;
        else if (!s->IsPtrData() && s->type == nsXPTType::T_FLOAT) {
            if (nr_fpr < FPR_COUNT)
                // The value in %xmm register is already prepared to
                // be retrieved as a float. Therefore, we pass the
                // value verbatim, as a double without conversion.
                fpregs[nr_fpr++] = s->val.d;
            else {
                *((float *)d) = s->val.f;
        else {
            if (nr_gpr < GPR_COUNT)
                gpregs[nr_gpr++] = value;
                *d++ = value;

Here is the call graph for this function:

static void invoke_count_words ( PRUint32  paramCount,
nsXPTCVariant s,
PRUint32 nr_gpr,
PRUint32 nr_fpr,
PRUint32 nr_stack 
) [inline, static]

Definition at line 51 of file xptcinvoke_openbsd_amd64.cpp.

    nr_gpr = 1; // skip one GP register for 'that'
    nr_fpr = 0;
    nr_stack = 0;

    /* Compute number of eightbytes of class MEMORY.  */
    for (uint32 i = 0; i < paramCount; i++, s++) {
        if (!s->IsPtrData()
            && (s->type == nsXPTType::T_FLOAT || s->type == nsXPTType::T_DOUBLE)) {
            if (nr_fpr < FPR_COUNT)
        else {
            if (nr_gpr < GPR_COUNT)

Here is the call graph for this function:

XPTC_InvokeByIndex ( nsISupports *  that,
PRUint32  methodIndex,
PRUint32  paramCount,
nsXPTCVariant params 

Definition at line 136 of file xptcinvoke_openbsd_amd64.cpp.

    PRUint32 nr_gpr, nr_fpr, nr_stack;
    invoke_count_words(paramCount, params, nr_gpr, nr_fpr, nr_stack);
    // Stack, if used, must be 16-bytes aligned
    if (nr_stack)
        nr_stack = (nr_stack + 1) & ~1;

    // Load parameters to stack, if necessary
    PRUint64 *stack = (PRUint64 *) __builtin_alloca(nr_stack * 8);
    PRUint64 gpregs[GPR_COUNT];
    double fpregs[FPR_COUNT];
    invoke_copy_to_stack(stack, paramCount, params, gpregs, fpregs);

    // Load FPR registers from fpregs[]
    register double d0 asm("xmm0");
    register double d1 asm("xmm1");
    register double d2 asm("xmm2");
    register double d3 asm("xmm3");
    register double d4 asm("xmm4");
    register double d5 asm("xmm5");
    register double d6 asm("xmm6");
    register double d7 asm("xmm7");

    switch (nr_fpr) {
#define ARG_FPR(N) \
    case N+1: d##N = fpregs[N];
    case 0:;
#undef ARG_FPR
    // Load GPR registers from gpregs[]
    register PRUint64 a0 asm("rdi");
    register PRUint64 a1 asm("rsi");
    register PRUint64 a2 asm("rdx");
    register PRUint64 a3 asm("rcx");
    register PRUint64 a4 asm("r8");
    register PRUint64 a5 asm("r9");
    switch (nr_gpr) {
#define ARG_GPR(N) \
    case N+1: a##N = gpregs[N];
    case 1: a0 = (PRUint64) that;
    case 0:;
#undef ARG_GPR

    // Ensure that assignments to SSE registers won't be optimized away
    asm("" ::
        "x" (d0), "x" (d1), "x" (d2), "x" (d3),
        "x" (d4), "x" (d5), "x" (d6), "x" (d7));
    // Get pointer to method
    PRUint64 methodAddress = *((PRUint64 *)that);
    methodAddress += 8 * methodIndex;
    methodAddress = *((PRUint64 *)methodAddress);
    typedef PRUint32 (*Method)(PRUint64, PRUint64, PRUint64, PRUint64, PRUint64, PRUint64);
    PRUint32 result = ((Method)methodAddress)(a0, a1, a2, a3, a4, a5);
    return result;

Here is the call graph for this function:

Variable Documentation

Definition at line 47 of file xptcinvoke_openbsd_amd64.cpp.

Definition at line 44 of file xptcinvoke_openbsd_amd64.cpp.