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limited 8 bit support - removed unaligned memory accesses in VGA (initial patch by Johannes Schindelin) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1116 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-10-10 15:44:19 +00:00
parent 9bc9d1c75a
commit 188d857911
3 changed files with 35 additions and 10 deletions
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27
bswap.h
View File

@ -133,6 +133,9 @@ CPU_CONVERT(le, 64, uint64_t)
#define le16_to_cpupu(p) le16_to_cpup(p)
#define le32_to_cpupu(p) le32_to_cpup(p)
#define cpu_to_be16wu(p, v) cpu_to_be16w(p, v)
#define cpu_to_be32wu(p, v) cpu_to_be32w(p, v)
#else
static inline void cpu_to_le16wu(uint16_t *p, uint16_t v)
@ -165,6 +168,30 @@ static inline uint32_t le32_to_cpupu(const uint32_t *p)
return p1[0] | (p1[1] << 8) | (p1[2] << 16) | (p1[3] << 24);
}
static inline void cpu_to_be16wu(uint16_t *p, uint16_t v)
{
uint8_t *p1 = (uint8_t *)p;
p1[0] = v >> 8;
p1[1] = v;
}
static inline void cpu_to_be32wu(uint32_t *p, uint32_t v)
{
uint8_t *p1 = (uint8_t *)p;
p1[0] = v >> 24;
p1[1] = v >> 16;
p1[2] = v >> 8;
p1[3] = v;
}
#endif
#ifdef WORDS_BIGENDIAN
#define cpu_to_32wu cpu_to_be32wu
#else
#define cpu_to_32wu cpu_to_le32wu
#endif
#undef le_bswap

3
hw/vga.c
View File

@ -824,8 +824,7 @@ typedef void vga_draw_line_func(VGAState *s1, uint8_t *d,
static inline unsigned int rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b)
{
/* XXX: TODO */
return 0;
return ((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6);
}
static inline unsigned int rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b)

15
hw/vga_template.h
View File

@ -44,7 +44,7 @@ static inline void glue(vga_draw_glyph_line_, DEPTH)(uint8_t *d,
{
#if BPP == 1
((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
((uint32_t *)d)[1] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
#elif BPP == 2
((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
@ -106,22 +106,21 @@ static void glue(vga_draw_glyph9_, DEPTH)(uint8_t *d, int linesize,
xorcol = bgcol ^ fgcol;
do {
font_data = font_ptr[0];
/* XXX: unaligned accesses are done */
#if BPP == 1
((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
cpu_to_32wu((uint32_t *)d, (dmask16[(font_data >> 4)] & xorcol) ^ bgcol);
v = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = v;
cpu_to_32wu(((uint32_t *)d)+1, v);
if (dup9)
((uint8_t *)d)[8] = v >> (24 * (1 - BIG));
else
((uint8_t *)d)[8] = bgcol;
#elif BPP == 2
((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
cpu_to_32wu(((uint32_t *)d)+0, (dmask4[(font_data >> 6)] & xorcol) ^ bgcol);
cpu_to_32wu(((uint32_t *)d)+1, (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol);
cpu_to_32wu(((uint32_t *)d)+2, (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol);
v = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
((uint32_t *)d)[3] = v;
cpu_to_32wu(((uint32_t *)d)+3, v);
if (dup9)
((uint16_t *)d)[8] = v >> (16 * (1 - BIG));
else