FIX #1910: fix code generated for GDTOI on x86_32

diff --git a/compiler/nativeGen/PprMach.hs b/compiler/nativeGen/PprMach.hs
index 5115955..26a6f28 100644 (file)
--- a/compiler/nativeGen/PprMach.hs
+++ b/compiler/nativeGen/PprMach.hs
@@ -1415,9 +1415,18 @@ pprInstr g@(GDTOI src dst)
 pprInstr g@(GITOF src dst) 
    = pprInstr (GITOD src dst)
 pprInstr g@(GITOD src dst) 
 pprInstr g@(GITOF src dst) 
    = pprInstr (GITOD src dst)
 pprInstr g@(GITOD src dst) 

-   = pprG g (hcat [gtab, text "pushl ", pprReg I32 src, 
-                   text " ; ffree %st(7); fildl (%esp) ; ",
-                   gpop dst 1, text " ; addl $4,%esp"])
+   = pprG g (vcat [
+         hcat [gtab, text "subl $8, %esp ; fnstcw 4(%esp)"],
+         hcat [gtab, gpush src 0],
+         hcat [gtab, text "movzwl 4(%esp), ", reg,
+                     text " ; orl $0xC00, ", reg],
+         hcat [gtab, text "movl ", reg, text ", 0(%esp) ; fldcw 0(%esp)"],
+         hcat [gtab, text "fistpl 0(%esp)"],
+         hcat [gtab, text "fldcw 4(%esp) ; movl 0(%esp), ", reg],
+         hcat [gtab, text "addl $8, %esp"]
+     ])
+   where
+     reg = pprReg I32 dst

 
 {- Gruesome swamp follows.  If you're unfortunate enough to have ventured
    this far into the jungle AND you give a Rat's Ass (tm) what's going
 
 {- Gruesome swamp follows.  If you're unfortunate enough to have ventured
    this far into the jungle AND you give a Rat's Ass (tm) what's going