Blame SOURCES/kvm-cirrus-stop-passing-around-src-pointers-in-the-blitt.patch

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From d29af2a00b6126d2c3af535d128beeb80216c197 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Tue, 21 Mar 2017 09:58:06 +0100
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Subject: [PATCH 6/7] cirrus: stop passing around src pointers in the blitter
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RH-Author: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: <1490090287-1503-7-git-send-email-kraxel@redhat.com>
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Patchwork-id: 74417
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O-Subject: [RHEL-7.4 qemu-kvm PATCH 6/7] cirrus: stop passing around src pointers in the blitter
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Bugzilla: 1430059
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RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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Does basically the same as "cirrus: stop passing around dst pointers in
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the blitter", just for the src pointer instead of the dst pointer.
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For the src we have to care about cputovideo blits though and fetch the
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data from s->cirrus_bltbuf instead of vga memory.  The cirrus_src*()
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helper functions handle that.
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: 1489584487-3489-1-git-send-email-kraxel@redhat.com
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(cherry picked from commit ffaf857778286ca54e3804432a2369a279e73aa7)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 hw/display/cirrus_vga.c      | 61 +++++++++++++++++++++++++++++++++++---------
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 hw/display/cirrus_vga_rop.h  | 48 +++++++++++++++++-----------------
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 hw/display/cirrus_vga_rop2.h | 38 ++++++++++++++-------------
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 3 files changed, 93 insertions(+), 54 deletions(-)
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diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
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index 003cc4c..c1324ab 100644
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--- a/hw/display/cirrus_vga.c
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+++ b/hw/display/cirrus_vga.c
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@@ -174,7 +174,7 @@
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 struct CirrusVGAState;
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 typedef void (*cirrus_bitblt_rop_t) (struct CirrusVGAState *s,
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-                                     uint32_t dstaddr, const uint8_t *src,
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+                                     uint32_t dstaddr, uint32_t srcaddr,
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 				     int dstpitch, int srcpitch,
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 				     int bltwidth, int bltheight);
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 typedef void (*cirrus_fill_t)(struct CirrusVGAState *s,
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@@ -316,7 +316,7 @@ static bool blit_is_unsafe(struct CirrusVGAState *s, bool dst_only)
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 }
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 static void cirrus_bitblt_rop_nop(CirrusVGAState *s,
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-                                  uint32_t dstaddr, const uint8_t *src,
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+                                  uint32_t dstaddr, uint32_t srcaddr,
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                                   int dstpitch,int srcpitch,
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                                   int bltwidth,int bltheight)
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 {
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@@ -328,6 +328,45 @@ static void cirrus_bitblt_fill_nop(CirrusVGAState *s,
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 {
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 }
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+static inline uint8_t cirrus_src(CirrusVGAState *s, uint32_t srcaddr)
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+{
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+    if (s->cirrus_srccounter) {
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+        /* cputovideo */
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+        return s->cirrus_bltbuf[srcaddr & (CIRRUS_BLTBUFSIZE - 1)];
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+    } else {
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+        /* videotovideo */
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+        return s->vga.vram_ptr[srcaddr & s->cirrus_addr_mask];
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+    }
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+}
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+
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+static inline uint16_t cirrus_src16(CirrusVGAState *s, uint32_t srcaddr)
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+{
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+    uint16_t *src;
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+
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+    if (s->cirrus_srccounter) {
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+        /* cputovideo */
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+        src = (void *)&s->cirrus_bltbuf[srcaddr & (CIRRUS_BLTBUFSIZE - 1) & ~1];
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+    } else {
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+        /* videotovideo */
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+        src = (void *)&s->vga.vram_ptr[srcaddr & s->cirrus_addr_mask & ~1];
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+    }
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+    return *src;
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+}
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+
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+static inline uint32_t cirrus_src32(CirrusVGAState *s, uint32_t srcaddr)
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+{
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+    uint32_t *src;
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+
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+    if (s->cirrus_srccounter) {
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+        /* cputovideo */
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+        src = (void *)&s->cirrus_bltbuf[srcaddr & (CIRRUS_BLTBUFSIZE - 1) & ~3];
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+    } else {
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+        /* videotovideo */
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+        src = (void *)&s->vga.vram_ptr[srcaddr & s->cirrus_addr_mask & ~3];
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+    }
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+    return *src;
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+}
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+
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 #define ROP_NAME 0
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 #define ROP_FN(d, s) 0
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 #include "cirrus_vga_rop.h"
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@@ -670,10 +709,10 @@ static void cirrus_invalidate_region(CirrusVGAState * s, int off_begin,
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     }
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 }
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-static int cirrus_bitblt_common_patterncopy(CirrusVGAState *s, bool videosrc)
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+static int cirrus_bitblt_common_patterncopy(CirrusVGAState *s)
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 {
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     uint32_t patternsize;
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-    uint8_t *src;
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+    bool videosrc = !s->cirrus_srccounter;
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     if (videosrc) {
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         switch (s->vga.get_bpp(&s->vga)) {
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@@ -694,16 +733,14 @@ static int cirrus_bitblt_common_patterncopy(CirrusVGAState *s, bool videosrc)
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         if (s->cirrus_blt_srcaddr + patternsize > s->vga.vram_size) {
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             return 0;
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         }
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-        src = s->vga.vram_ptr + s->cirrus_blt_srcaddr;
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-    } else {
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-        src = s->cirrus_bltbuf;
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     }
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     if (blit_is_unsafe(s, true)) {
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         return 0;
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     }
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-    (*s->cirrus_rop) (s, s->cirrus_blt_dstaddr, src,
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+    (*s->cirrus_rop) (s, s->cirrus_blt_dstaddr,
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+                      videosrc ? s->cirrus_blt_srcaddr : 0,
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                       s->cirrus_blt_dstpitch, 0,
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                       s->cirrus_blt_width, s->cirrus_blt_height);
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     cirrus_invalidate_region(s, s->cirrus_blt_dstaddr,
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@@ -740,7 +777,7 @@ static int cirrus_bitblt_solidfill(CirrusVGAState *s, int blt_rop)
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 static int cirrus_bitblt_videotovideo_patterncopy(CirrusVGAState * s)
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 {
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-    return cirrus_bitblt_common_patterncopy(s, true);
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+    return cirrus_bitblt_common_patterncopy(s);
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 }
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 static int cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
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@@ -790,7 +827,7 @@ static int cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
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     }
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     (*s->cirrus_rop) (s, s->cirrus_blt_dstaddr,
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-                      s->vga.vram_ptr + s->cirrus_blt_srcaddr,
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+                      s->cirrus_blt_srcaddr,
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 		      s->cirrus_blt_dstpitch, s->cirrus_blt_srcpitch,
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 		      s->cirrus_blt_width, s->cirrus_blt_height);
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@@ -833,7 +870,7 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s)
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     if (s->cirrus_srccounter > 0) {
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         if (s->cirrus_blt_mode & CIRRUS_BLTMODE_PATTERNCOPY) {
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-            cirrus_bitblt_common_patterncopy(s, false);
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+            cirrus_bitblt_common_patterncopy(s);
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         the_end:
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             s->cirrus_srccounter = 0;
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             cirrus_bitblt_reset(s);
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@@ -841,7 +878,7 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s)
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             /* at least one scan line */
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             do {
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                 (*s->cirrus_rop)(s, s->cirrus_blt_dstaddr,
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-                                  s->cirrus_bltbuf, 0, 0, s->cirrus_blt_width, 1);
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+                                 0, 0, 0, s->cirrus_blt_width, 1);
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                 cirrus_invalidate_region(s, s->cirrus_blt_dstaddr, 0,
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                                          s->cirrus_blt_width, 1);
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                 s->cirrus_blt_dstaddr += s->cirrus_blt_dstpitch;
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diff --git a/hw/display/cirrus_vga_rop.h b/hw/display/cirrus_vga_rop.h
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index 3b16d70..16dffb8 100644
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--- a/hw/display/cirrus_vga_rop.h
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+++ b/hw/display/cirrus_vga_rop.h
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@@ -78,7 +78,7 @@ static inline void glue(rop_32_, ROP_NAME)(CirrusVGAState *s,
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 static void
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 glue(cirrus_bitblt_rop_fwd_, ROP_NAME)(CirrusVGAState *s,
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                                        uint32_t dstaddr,
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-                                       const uint8_t *src,
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+                                       uint32_t srcaddr,
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                                        int dstpitch, int srcpitch,
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                                        int bltwidth, int bltheight)
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 {
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@@ -93,19 +93,19 @@ glue(cirrus_bitblt_rop_fwd_, ROP_NAME)(CirrusVGAState *s,
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x++) {
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-            ROP_OP(s, dstaddr, *src);
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+            ROP_OP(s, dstaddr, cirrus_src(s, srcaddr));
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             dstaddr++;
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-            src++;
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+            srcaddr++;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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 static void
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 glue(cirrus_bitblt_rop_bkwd_, ROP_NAME)(CirrusVGAState *s,
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                                         uint32_t dstaddr,
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-                                        const uint8_t *src,
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+                                        uint32_t srcaddr,
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                                         int dstpitch, int srcpitch,
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                                         int bltwidth, int bltheight)
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 {
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@@ -114,19 +114,19 @@ glue(cirrus_bitblt_rop_bkwd_, ROP_NAME)(CirrusVGAState *s,
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     srcpitch += bltwidth;
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x++) {
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-            ROP_OP(s, dstaddr, *src);
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+            ROP_OP(s, dstaddr, cirrus_src(s, srcaddr));
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             dstaddr--;
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-            src--;
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+            srcaddr--;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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 static void
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 glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
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                                                        uint32_t dstaddr,
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-                                                       const uint8_t *src,
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+                                                       uint32_t srcaddr,
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                                                        int dstpitch,
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                                                        int srcpitch,
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                                                        int bltwidth,
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@@ -143,19 +143,19 @@ glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x++) {
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-            ROP_OP_TR(s, dstaddr, *src, transp);
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+            ROP_OP_TR(s, dstaddr, cirrus_src(s, srcaddr), transp);
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             dstaddr++;
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-            src++;
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+            srcaddr++;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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 static void
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 glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
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                                                         uint32_t dstaddr,
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-                                                        const uint8_t *src,
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+                                                        uint32_t srcaddr,
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                                                         int dstpitch,
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                                                         int srcpitch,
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                                                         int bltwidth,
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@@ -167,19 +167,19 @@ glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_8)(CirrusVGAState *s,
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     srcpitch += bltwidth;
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x++) {
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-            ROP_OP_TR(s, dstaddr, *src, transp);
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+            ROP_OP_TR(s, dstaddr, cirrus_src(s, srcaddr), transp);
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             dstaddr--;
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-            src--;
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+            srcaddr--;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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 static void
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 glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
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                                                         uint32_t dstaddr,
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-                                                        const uint8_t *src,
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+                                                        uint32_t srcaddr,
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                                                         int dstpitch,
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                                                         int srcpitch,
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                                                         int bltwidth,
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@@ -196,19 +196,19 @@ glue(glue(cirrus_bitblt_rop_fwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x+=2) {
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-            ROP_OP_TR_16(s, dstaddr, *(uint16_t *)src, transp);
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+            ROP_OP_TR_16(s, dstaddr, cirrus_src16(s, srcaddr), transp);
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             dstaddr += 2;
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-            src += 2;
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+            srcaddr += 2;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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 static void
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 glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
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                                                          uint32_t dstaddr,
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-                                                         const uint8_t *src,
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+                                                         uint32_t srcaddr,
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                                                          int dstpitch,
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                                                          int srcpitch,
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                                                          int bltwidth,
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@@ -220,12 +220,12 @@ glue(glue(cirrus_bitblt_rop_bkwd_transp_, ROP_NAME),_16)(CirrusVGAState *s,
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     srcpitch += bltwidth;
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     for (y = 0; y < bltheight; y++) {
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         for (x = 0; x < bltwidth; x+=2) {
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-            ROP_OP_TR_16(s, dstaddr, *(uint16_t *)src, transp);
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+            ROP_OP_TR_16(s, dstaddr, cirrus_src16(s, srcaddr), transp);
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             dstaddr -= 2;
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-            src -= 2;
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+            srcaddr -= 2;
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         }
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         dstaddr += dstpitch;
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-        src += srcpitch;
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+        srcaddr += srcpitch;
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     }
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 }
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diff --git a/hw/display/cirrus_vga_rop2.h b/hw/display/cirrus_vga_rop2.h
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index bc92f0e..b86bcd6 100644
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--- a/hw/display/cirrus_vga_rop2.h
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+++ b/hw/display/cirrus_vga_rop2.h
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@@ -41,14 +41,14 @@
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 static void
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 glue(glue(glue(cirrus_patternfill_, ROP_NAME), _),DEPTH)
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      (CirrusVGAState *s, uint32_t dstaddr,
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-      const uint8_t *src,
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+      uint32_t srcaddr,
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       int dstpitch, int srcpitch,
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       int bltwidth, int bltheight)
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 {
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     uint32_t addr;
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     int x, y, pattern_y, pattern_pitch, pattern_x;
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     unsigned int col;
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-    const uint8_t *src1;
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+    uint32_t src1addr;
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 #if DEPTH == 24
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     int skipleft = s->vga.gr[0x2f] & 0x1f;
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 #else
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@@ -66,22 +66,24 @@ glue(glue(glue(cirrus_patternfill_, ROP_NAME), _),DEPTH)
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     for(y = 0; y < bltheight; y++) {
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         pattern_x = skipleft;
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         addr = dstaddr + skipleft;
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-        src1 = src + pattern_y * pattern_pitch;
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+        src1addr = srcaddr + pattern_y * pattern_pitch;
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         for (x = skipleft; x < bltwidth; x += (DEPTH / 8)) {
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 #if DEPTH == 8
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-            col = src1[pattern_x];
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+            col = cirrus_src(s, src1addr + pattern_x);
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             pattern_x = (pattern_x + 1) & 7;
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 #elif DEPTH == 16
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-            col = ((uint16_t *)(src1 + pattern_x))[0];
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+            col = cirrus_src16(s, src1addr + pattern_x);
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             pattern_x = (pattern_x + 2) & 15;
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 #elif DEPTH == 24
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             {
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-                const uint8_t *src2 = src1 + pattern_x * 3;
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-                col = src2[0] | (src2[1] << 8) | (src2[2] << 16);
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+                uint32_t src2addr = src1addr + pattern_x * 3;
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+                col = cirrus_src(s, src2addr) |
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+                    (cirrus_src(s, src2addr + 1) << 8) |
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+                    (cirrus_src(s, src2addr + 2) << 16);
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                 pattern_x = (pattern_x + 1) & 7;
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             }
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 #else
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-            col = ((uint32_t *)(src1 + pattern_x))[0];
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+            col = cirrus_src32(s, src1addr + pattern_x);
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             pattern_x = (pattern_x + 4) & 31;
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 #endif
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             PUTPIXEL(s, addr, col);
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@@ -96,7 +98,7 @@ glue(glue(glue(cirrus_patternfill_, ROP_NAME), _),DEPTH)
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 static void
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 glue(glue(glue(cirrus_colorexpand_transp_, ROP_NAME), _),DEPTH)
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      (CirrusVGAState *s, uint32_t dstaddr,
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-      const uint8_t *src,
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+      uint32_t srcaddr,
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       int dstpitch, int srcpitch,
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       int bltwidth, int bltheight)
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 {
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@@ -124,12 +126,12 @@ glue(glue(glue(cirrus_colorexpand_transp_, ROP_NAME), _),DEPTH)
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     for(y = 0; y < bltheight; y++) {
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         bitmask = 0x80 >> srcskipleft;
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-        bits = *src++ ^ bits_xor;
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+        bits = cirrus_src(s, srcaddr++) ^ bits_xor;
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         addr = dstaddr + dstskipleft;
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         for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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             if ((bitmask & 0xff) == 0) {
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                 bitmask = 0x80;
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-                bits = *src++ ^ bits_xor;
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+                bits = cirrus_src(s, srcaddr++) ^ bits_xor;
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             }
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             index = (bits & bitmask);
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             if (index) {
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@@ -145,7 +147,7 @@ glue(glue(glue(cirrus_colorexpand_transp_, ROP_NAME), _),DEPTH)
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 static void
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 glue(glue(glue(cirrus_colorexpand_, ROP_NAME), _),DEPTH)
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      (CirrusVGAState *s, uint32_t dstaddr,
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-      const uint8_t *src,
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+      uint32_t srcaddr,
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       int dstpitch, int srcpitch,
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       int bltwidth, int bltheight)
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 {
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@@ -162,12 +164,12 @@ glue(glue(glue(cirrus_colorexpand_, ROP_NAME), _),DEPTH)
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     colors[1] = s->cirrus_blt_fgcol;
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     for(y = 0; y < bltheight; y++) {
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         bitmask = 0x80 >> srcskipleft;
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-        bits = *src++;
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+        bits = cirrus_src(s, srcaddr++);
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         addr = dstaddr + dstskipleft;
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         for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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             if ((bitmask & 0xff) == 0) {
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                 bitmask = 0x80;
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-                bits = *src++;
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+                bits = cirrus_src(s, srcaddr++);
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             }
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             col = colors[!!(bits & bitmask)];
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             PUTPIXEL(s, addr, col);
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@@ -181,7 +183,7 @@ glue(glue(glue(cirrus_colorexpand_, ROP_NAME), _),DEPTH)
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 static void
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 glue(glue(glue(cirrus_colorexpand_pattern_transp_, ROP_NAME), _),DEPTH)
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      (CirrusVGAState *s, uint32_t dstaddr,
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-      const uint8_t *src,
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+      uint32_t srcaddr,
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       int dstpitch, int srcpitch,
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       int bltwidth, int bltheight)
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 {
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@@ -207,7 +209,7 @@ glue(glue(glue(cirrus_colorexpand_pattern_transp_, ROP_NAME), _),DEPTH)
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     pattern_y = s->cirrus_blt_srcaddr & 7;
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     for(y = 0; y < bltheight; y++) {
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-        bits = src[pattern_y] ^ bits_xor;
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+        bits = cirrus_src(s, srcaddr + pattern_y) ^ bits_xor;
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         bitpos = 7 - srcskipleft;
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         addr = dstaddr + dstskipleft;
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         for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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@@ -225,7 +227,7 @@ glue(glue(glue(cirrus_colorexpand_pattern_transp_, ROP_NAME), _),DEPTH)
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 static void
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 glue(glue(glue(cirrus_colorexpand_pattern_, ROP_NAME), _),DEPTH)
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      (CirrusVGAState *s, uint32_t dstaddr,
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-      const uint8_t *src,
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+      uint32_t srcaddr,
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       int dstpitch, int srcpitch,
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       int bltwidth, int bltheight)
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 {
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@@ -242,7 +244,7 @@ glue(glue(glue(cirrus_colorexpand_pattern_, ROP_NAME), _),DEPTH)
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     pattern_y = s->cirrus_blt_srcaddr & 7;
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     for(y = 0; y < bltheight; y++) {
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-        bits = src[pattern_y];
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+        bits = cirrus_src(s, srcaddr + pattern_y);
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         bitpos = 7 - srcskipleft;
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         addr = dstaddr + dstskipleft;
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         for (x = dstskipleft; x < bltwidth; x += (DEPTH / 8)) {
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-- 
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1.8.3.1
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