asm/win: add psize tests

tests/asm/meson.build

@@ -49,6 +49,8 @@ asm_tests = {
     'setwd-2': {},
     'setwd-invalidate-regs-1': {},
     'setwd-invalidate-regs-2': {},
+    'setwd-psize-1': {},
+    'setwd-psize-2': { 'should_fail': true },
     'setbn-invalidate-regs-1': {},
     'setbn-invalidate-regs-2': { 'should_fail': true },
     'setbp-invalidate-regs-1': {},

tests/asm/win/setwd-psize-1.S

@@ -0,0 +1,20 @@
+#include "test_start.S"
+
+        setwd wsz=8, nfx=1
+
+        disp %ctpr1, 0f
+        // psize = (8 - 4) * 2 = 8 regs
+        call %ctpr1, wbs=4
+
+        disp %ctpr1, 0f
+        // psize = (8 - 8) * 2 = 0 regs
+        call %ctpr1, wbs=8
+
+#include "test_end.S"
+
+0:
+    {
+        setwd wsz=4, nfx=1
+        return %ctpr3
+    }
+        ct %ctpr3

tests/asm/win/setwd-psize-2.S

@@ -0,0 +1,21 @@
+#include "test_start.S"
+
+    {
+        setwd wsz=16, nfx=1
+        disp %ctpr1, 0f
+    }
+    {
+        // psize = (16 - 4) * 2 = 24 regs
+        call %ctpr1, wbs=4
+    }
+
+#include "test_end.S"
+
+0:
+    // psize = 24
+    {
+        // try to set wsz lower than psize
+        setwd wsz=4, nfx=1
+        return %ctpr3
+    }
+        ct %ctpr3