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$NetBSD: patch-bu,v 1.2 2004/06/23 16:47:12 taya Exp $
--- xpcom/reflect/xptcall/src/md/unix/xptcinvoke_unixish_amd64.cpp.orig 2004-05-30 21:38:13.000000000 +0900
+++ xpcom/reflect/xptcall/src/md/unix/xptcinvoke_unixish_amd64.cpp 2004-05-30 21:37:22.000000000 +0900
@@ -0,0 +1,174 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// Platform specific code to invoke XPCOM methods on native objects
+
+#include "xptcprivate.h"
+
+// 6 integral parameters are passed in registers
+const PRUint32 GPR_COUNT = 6;
+
+// 8 floating point parameters are passed in SSE registers
+const PRUint32 FPR_COUNT = 8;
+
+// Remember that these 'words' are 64-bit long
+static inline void
+invoke_count_words(PRUint32 paramCount, nsXPTCVariant * s,
+ PRUint32 & nr_gpr, PRUint32 & nr_fpr, PRUint32 & nr_stack)
+{
+ 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)
+ nr_fpr++;
+ else
+ nr_stack++;
+ }
+ else {
+ if (nr_gpr < GPR_COUNT)
+ nr_gpr++;
+ else
+ nr_stack++;
+ }
+ }
+}
+
+static void
+invoke_copy_to_stack(PRUint64 * d, PRUint32 paramCount, nsXPTCVariant * s,
+ PRUint64 * gpregs, double * fpregs)
+{
+ 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;
+ 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;
+ d++;
+ }
+ }
+ else {
+ if (nr_gpr < GPR_COUNT)
+ gpregs[nr_gpr++] = value;
+ else
+ *d++ = value;
+ }
+ }
+}
+
+extern "C"
+XPTC_PUBLIC_API(nsresult)
+XPTC_InvokeByIndex(nsISupports * that, PRUint32 methodIndex,
+ PRUint32 paramCount, nsXPTCVariant * params)
+{
+ 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];
+ ARG_FPR(7);
+ ARG_FPR(6);
+ ARG_FPR(5);
+ ARG_FPR(4);
+ ARG_FPR(3);
+ ARG_FPR(2);
+ ARG_FPR(1);
+ ARG_FPR(0);
+ 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];
+ ARG_GPR(5);
+ ARG_GPR(4);
+ ARG_GPR(3);
+ ARG_GPR(2);
+ ARG_GPR(1);
+ 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;
+}
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