diff options
| -rw-r--r-- | src/mesa/x86/read_rgba_span_x86.S | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/mesa/x86/read_rgba_span_x86.S b/src/mesa/x86/read_rgba_span_x86.S index 7315826b4db..6b8036e5b8d 100644 --- a/src/mesa/x86/read_rgba_span_x86.S +++ b/src/mesa/x86/read_rgba_span_x86.S @@ -92,7 +92,7 @@ _generic_read_RGBA_span_BGRA8888_REV_MMX: movl 12(%esp), %ecx /* destination pointer */ testl %edx, %edx - je .L20 /* Bail if there's nothing to do. */ + jle .L20 /* Bail if there's nothing to do. */ movl %ebx, %eax @@ -189,6 +189,9 @@ _generic_read_RGBA_span_BGRA8888_REV_SSE: movl 24(%esp), %edx /* number of pixels to copy */ movl 20(%esp), %ecx /* destination pointer */ + testl %edx, %edx + jle .L35 /* Bail if there's nothing to do. */ + movl %esp, %ebp subl $16, %esp andl $0xfffffff0, %esp @@ -348,6 +351,9 @@ _generic_read_RGBA_span_BGRA8888_REV_SSE2: movl %ebx, %eax movl %edx, %esi + testl %edx, %edx + jle .L46 /* Bail if there's nothing to do. */ + /* If the source pointer isn't a multiple of 16 we have to process * a few pixels the "slow" way to get the address aligned for * the SSE fetch intsructions. @@ -528,7 +534,8 @@ _generic_read_RGBA_span_RGB565_MMX: movq prescale, %mm6 movq scale, %mm7 - shrl $2, %ecx + sarl $2, %ecx + jle .L01 /* Bail early if the count is negative. */ jmp .L02 .L03: |