diff options
Diffstat (limited to 'src/mesa/drivers/dos/virtual.S')
| -rw-r--r-- | src/mesa/drivers/dos/virtual.S | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/virtual.S b/src/mesa/drivers/dos/virtual.S new file mode 100644 index 0000000000..3633161c98 --- /dev/null +++ b/src/mesa/drivers/dos/virtual.S @@ -0,0 +1,237 @@ +/*
+ * Mesa 3-D graphics library
+ * Version: 4.0
+ *
+ * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.1 for Mesa 4.0
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+ .file "virtual.S"
+
+/*
+ * extern word32 vl_hw_granularity;
+ * extern int vl_video_selector;
+ * extern int vl_current_offset, vl_current_delta;
+ */
+
+ .text
+
+/*
+ * void v_clear16 (void *buffer, int bytes, int color);
+ */
+ .balign 4
+ .global _v_clear16
+_v_clear16:
+ movl 12(%esp), %eax
+ pushw %ax
+ pushw %ax
+ popl %eax
+ jmp _v_clear_common
+
+/*
+ * void v_clear32 (void *buffer, int bytes, int color);
+ */
+ .balign 4
+ .global _v_clear32
+_v_clear32:
+ movl 12(%esp), %eax
+ .balign 4
+_v_clear_common:
+ movl 8(%esp), %ecx
+ movl 4(%esp), %edx
+ shrl $2, %ecx
+ 0:
+ .balign 4
+ movl %eax, (%edx)
+ addl $4, %edx
+ decl %ecx
+ jnz 0b
+ ret
+
+/*
+ * void v_clear24 (void *buffer, int bytes, int color);
+ */
+ .balign 4
+ .global _v_clear24
+_v_clear24:
+ movl 8(%esp), %edx
+ movl $0xaaaaaaab, %eax
+ mull %edx
+ movl 12(%esp), %eax
+ movl %edx, %ecx
+ movl 4(%esp), %edx
+ pushl %ebx
+ shrl %ecx
+ movb 18(%esp), %bl
+ .balign 4
+ 0:
+ movw %ax, (%edx)
+ movb %bl, 2(%edx)
+ addl $3, %edx
+ decl %ecx
+ jnz 0b
+ popl %ebx
+ ret
+
+/*
+ * void b_dump_virtual (void *buffer, int stride, int height);
+ */
+ .balign 4
+ .global _b_dump_virtual
+_b_dump_virtual:
+ pushl %ebx
+ pushl %esi
+ pushl %edi
+ pushl %ebp
+ movl _vl_video_selector, %fs
+ movl 4*4+4+0(%esp), %esi
+ movl _vl_hw_granularity, %ebp
+ xorl %edx, %edx
+ movl _vl_current_offset, %eax
+ divl %ebp
+ movl %edx, %edi
+ pushl %eax
+ movl %eax, %edx
+ xorl %ebx, %ebx
+ movw $0x4f05, %ax
+ int $0x10
+ movl _vl_current_delta, %ebx
+ movl 5*4+4+4(%esp), %ecx
+ movl 5*4+4+8(%esp), %edx
+ shrl $2, %ecx
+ .balign 4
+ 0:
+ pushl %ecx
+ .balign 4
+ 1:
+ cmpl %ebp, %edi
+ jb 2f
+ pushl %ebx
+ pushl %edx
+ incl 12(%esp)
+ movw $0x4f05, %ax
+ movl 12(%esp), %edx
+ xorl %ebx, %ebx
+ int $0x10
+ popl %edx
+ popl %ebx
+ subl %ebp, %edi
+ 2:
+ movl (%esi), %eax
+ addl $4, %esi
+ movl %eax, %fs:(%edi)
+ addl $4, %edi
+ decl %ecx
+ jnz 1b
+ popl %ecx
+ addl %ebx, %edi
+ decl %edx
+ jnz 0b
+ popl %eax
+ popl %ebp
+ popl %edi
+ popl %esi
+ popl %ebx
+ ret
+
+/*
+ * void l_dump_virtual (void *buffer, int stride, int height);
+ */
+ .balign 4
+ .global _l_dump_virtual
+_l_dump_virtual:
+ pushl %ebx
+ pushl %esi
+ pushl %edi
+ movl _vl_video_selector, %fs
+ movl 3*4+4+0(%esp), %esi
+ movl _vl_current_offset, %edi
+ movl 3*4+4+4(%esp), %ecx
+ movl 3*4+4+8(%esp), %edx
+ movl _vl_current_delta, %ebx
+ shrl $2, %ecx
+ .balign 4
+ 0:
+ pushl %ecx
+ .balign 4
+ 1:
+ movl (%esi), %eax
+ addl $4, %esi
+ movl %eax, %fs:(%edi)
+ addl $4, %edi
+ decl %ecx
+ jnz 1b
+ popl %ecx
+ addl %ebx, %edi
+ decl %edx
+ jnz 0b
+ popl %edi
+ popl %esi
+ popl %ebx
+ ret
+
+/*
+ * void v_putpixel16 (void *buffer, int offset, int color);
+ */
+ .balign 4
+ .global _v_putpixel16
+_v_putpixel16:
+ movl 8(%esp), %edx
+ shll %edx
+ movl 12(%esp), %eax
+ addl 4(%esp), %edx
+ movw %ax, (%edx)
+ ret
+
+/*
+ * void v_putpixel24 (void *buffer, int offset, int color);
+ */
+ .balign 4
+ .global _v_putpixel24
+_v_putpixel24:
+ movl 8(%esp), %edx
+ leal (%edx, %edx, 2), %edx
+ movl 12(%esp), %eax
+ addl 4(%esp), %edx
+ movw %ax, (%edx)
+ shrl $16, %eax
+ movb %al, 2(%edx)
+ ret
+
+/*
+ * void v_putpixel32 (void *buffer, int offset, int color);
+ */
+ .balign 4
+ .global _v_putpixel32
+_v_putpixel32:
+ movl 8(%esp), %edx
+ shll $2, %edx
+ movl 12(%esp), %eax
+ addl 4(%esp), %edx
+ movl %eax, (%edx)
+ ret
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