From 12f4afcba28931ea6f367e11abc2f27ba68ee7f9 Mon Sep 17 00:00:00 2001
From: Leslie Zhai <zhaixiang@loongson.cn>
Date: Thu, 14 Nov 2024 23:01:36 +0800
Subject: [LA64] Implement convert x64_va_list_t to sysv_varargs for float
 (#2025) (#2031)

* [LA64] Implement convert x64_va_list_t to sysv_varargs for float (#2025)

* [LA64] Implement myStackAlignGVariantNew (#2025)

* [LA64] Limit the log to LOG_DEBUG (#2055)

* [LA64] Add missing file (#2025)
---
 src/libtools/myalign.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

(limited to 'src/libtools')

diff --git a/src/libtools/myalign.c b/src/libtools/myalign.c
index d60070bd..796795c0 100644
--- a/src/libtools/myalign.c
+++ b/src/libtools/myalign.c
@@ -1139,6 +1139,66 @@ void myStackAlignScanfWValist(x64emu_t* emu, const char* fmt, uint64_t* mystack,
     }
 }
 
+void myStackAlignGVariantNew(x64emu_t* emu, const char* fmt, uint64_t* scratch, x64_va_list_t* b)
+{
+    uintptr_t* p = (uintptr_t*)(emu->scratch);
+    uintptr_t* p2 = (uintptr_t*)scratch;
+    int n = (X64_VA_MAX_REG - (*b)->gp_offset)/8;
+    int m = (X64_VA_MAX_XMM - (*b)->fp_offset)/8;
+    if(n) memcpy(&p[0], (*b)->reg_save_area+X64_VA_MAX_REG-n*8, n*8+m*16);
+    memcpy(&p[n+m], (*b)->overflow_arg_area, 20*8);
+    if (box64_log == LOG_DEBUG) {
+        printf_log(LOG_DEBUG, "%s\n", __FUNCTION__);
+        for (int i = 0; i < n+m+20; i++) {
+            printf_log(LOG_DEBUG, "p%d: 0x%lx\n", i, p[i]);
+        }
+    }
+    int idx = 0;
+    int gr_offs = 0;    // offset in the reg_save_area
+    int fr_offs = 0;
+    int oa_gr_offs = 0; // offset in the overflow_arg_area
+    int oa_fr_offs = 0;
+    const char* pfmt = fmt;
+    while (*pfmt) {
+        switch (*pfmt) {
+        case 'd':
+            // double
+            if (fr_offs > m-2) {
+                p2[idx] = p[n+m+oa_fr_offs];
+                oa_gr_offs++;
+                oa_fr_offs++;
+            } else {
+                p2[idx] = p[n+fr_offs];
+                fr_offs+=2;
+            }
+            idx++;
+            break;
+        case 'b':
+        case 'y':
+        case 'n':
+        case 'q':
+        case 'i':
+        case 'h':
+        case 'u':
+        case 'x':
+        case 't':
+            if (gr_offs > n-1) {
+                p2[idx] = p[n+m+oa_gr_offs];
+                oa_gr_offs++;
+                oa_fr_offs++;
+            } else {
+                p2[idx] = p[gr_offs];
+                gr_offs++;
+            }
+            idx++;
+            break;
+        default:
+            break;
+        }
+        pfmt++;
+    }
+}
+
 #endif
 
 #define MUTEX_SIZE_X64 40
-- 
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