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| author | rsc <devnull@localhost> | 2006-03-22 16:30:50 +0000 |
|---|---|---|
| committer | rsc <devnull@localhost> | 2006-03-22 16:30:50 +0000 |
| commit | 39ce0d5862cd5fab8c93d60b195610b2ac77a094 (patch) | |
| tree | 0b19fb4f9ea03b3b044f0c7b72ad000f7d02354a /src/libmp/386/mpvecdigmuladd.s | |
| parent | aff51ee51f0bab35fca95569c639042de8acf777 (diff) | |
| download | plan9port-39ce0d5862cd5fab8c93d60b195610b2ac77a094.tar.gz plan9port-39ce0d5862cd5fab8c93d60b195610b2ac77a094.tar.bz2 plan9port-39ce0d5862cd5fab8c93d60b195610b2ac77a094.zip | |
Avoid storing precious data below the stack pointer.
Diffstat (limited to 'src/libmp/386/mpvecdigmuladd.s')
| -rw-r--r-- | src/libmp/386/mpvecdigmuladd.s | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/src/libmp/386/mpvecdigmuladd.s b/src/libmp/386/mpvecdigmuladd.s index 987c6330..7d11f2a1 100644 --- a/src/libmp/386/mpvecdigmuladd.s +++ b/src/libmp/386/mpvecdigmuladd.s @@ -27,15 +27,16 @@ .type mpvecdigmuladd, @function mpvecdigmuladd: /* Prelude */ - pushl %ebp - movl %ebx, -4(%esp) /* save on stack */ - movl %esi, -8(%esp) - movl %edi, -12(%esp) + pushl %ebp /* save on stack */ + pushl %ebx + pushl %esi + pushl %edi - movl 8(%esp), %esi /* b */ - movl 12(%esp), %ecx /* n */ - movl 16(%esp), %ebx /* m */ - movl 20(%esp), %edi /* p */ + leal 20(%esp), %ebp /* %ebp = FP for now */ + movl 0(%ebp), %esi /* b */ + movl 4(%ebp), %ecx /* n */ + movl 8(%ebp), %ebx /* m */ + movl 12(%ebp), %edi /* p */ movl %ecx, %ebp negl %ebp /* BP = -n */ shll $2, %ecx @@ -61,9 +62,9 @@ _muladdnocarry2: adcl %eax, %eax /* return carry out of p[n] */ /* Postlude */ - movl -4(%esp), %ebx /* restore from stack */ - movl -8(%esp), %esi - movl -12(%esp), %edi - movl %esp, %ebp - leave + popl %edi + popl %esi + popl %ebx + popl %ebp ret + |