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removed artefact cls/pushf/popf

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This commit is contained in:
Nikolay Volf 2016-02-25 17:59:08 +03:00
parent fb5779a00e
commit 7525ff23cf
1 changed files with 11 additions and 29 deletions
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40
util/src/uint.rs
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@ -168,7 +168,6 @@ macro_rules! uint_overflowing_mul {
let overflow: u8;
unsafe {
asm!("
clc
mov $5, %rax
mulq $9
mov %rax, $0
@ -176,77 +175,59 @@ macro_rules! uint_overflowing_mul {
mov $6, %rax
mulq $9
clc
adc %rax, $1
add %rax, $1
mov %rdx, $2
mov $5, %rax
pushf
mulq $10
popf
adc %rax, $1
add %rax, $1
adc %rdx, $2
mov $6, %rax
mulq $10
clc
adc %rax, $2
add %rax, $2
mov %rdx, $3
mov $7, %rax
mulq $9
clc
adc %rax, $2
add %rax, $2
adc %rdx, $3
mov $5, %rax
mulq $11
clc
adc %rax, $2
add %rax, $2
adc %rdx, $3
mov $8, %rax
pushf
mulq $9
popf
adc %rax, $3
adc $$0, %rdx
mov %rdx, %rcx
clc
mov $7, %rax
pushf
mulq $10
popf
adc %rax, $3
add %rax, $3
adc $$0, %rdx
or %rdx, %rcx
clc
mov $6, %rax
pushf
mulq $11
popf
adc %rax, $3
add %rax, $3
adc $$0, %rdx
or %rdx, %rcx
clc
mov $5, %rax
pushf
mulq $12
popf
adc %rax, $3
add %rax, $3
adc $$0, %rdx
or %rdx, %rcx
clc
cmpq $$0, %rcx
jne 2f
mov $8, %rax
cmpq $$0, %rax
setz %cl
sete %cl
mov $7, %rax
cmpq $$0, %rax
@ -264,7 +245,8 @@ macro_rules! uint_overflowing_mul {
and %dl, %cl
2: "
2:
"
: /* $0 */ "={r8}"(result[0]), /* $1 */ "={r9}"(result[1]), /* $2 */ "={r10}"(result[2]),
/* $3 */ "={r11}"(result[3]), /* $4 */ "={rcx}"(overflow)