diff options
Diffstat (limited to 'src/libmp/386/mpvecdigmulsub.s')
| -rw-r--r-- | src/libmp/386/mpvecdigmulsub.s | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/src/libmp/386/mpvecdigmulsub.s b/src/libmp/386/mpvecdigmulsub.s deleted file mode 100644 index 017e86c9..00000000 --- a/src/libmp/386/mpvecdigmulsub.s +++ /dev/null @@ -1,70 +0,0 @@ -# -# mpvecdigmulsub(mpdigit *b, int n, mpdigit m, mpdigit *p) -# -# p -= b*m -# -# each step look like: -# hi,lo = m*b[i] -# lo += oldhi + carry -# hi += carry -# p[i] += lo -# oldhi = hi -# -# the registers are: -# hi = DX - constrained by hardware -# lo = AX - constrained by hardware -# b = SI - can't be BP -# p = DI - can't be BP -# i = BP -# n = CX - constrained by LOOP instr -# m = BX -# oldhi = EX -# - -.text - -.p2align 2,0x90 -.globl mpvecdigmulsub -mpvecdigmulsub: - # Prelude - pushl %ebp # save on stack - pushl %ebx - pushl %esi - pushl %edi - - 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 - xorl %ebp, %ebp - pushl %ebp -_mulsubloop: - movl (%esi, %ebp, 4),%eax # lo = b[i] - mull %ebx # hi, lo = b[i] * m - addl 0(%esp), %eax # lo += oldhi - jae _mulsubnocarry1 - incl %edx # hi += carry -_mulsubnocarry1: - subl %eax, (%edi, %ebp, 4) - jae _mulsubnocarry2 - incl %edx # hi += carry -_mulsubnocarry2: - movl %edx, 0(%esp) - incl %ebp - loop _mulsubloop - popl %eax - subl %eax, (%edi, %ebp, 4) - jae _mulsubnocarry3 - movl $-1, %eax - jmp done -_mulsubnocarry3: - movl $1, %eax -done: - # Postlude - popl %edi - popl %esi - popl %ebx - popl %ebp - ret - |