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crypto: curve25519-x86_64 - Use XORL r32,32
x86_64 zero extends 32bit operations, so for 64bit operands, XORL r32,r32 is functionally equal to XORL r64,r64, but avoids a REX prefix byte when legacy registers are used. Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Uros Bizjak
Herbert Xu
parent
17bce37e1b
commit
db719539fd
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@ -46,11 +46,11 @@ static inline u64 add_scalar(u64 *out, const u64 *f1, u64 f2)
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asm volatile(
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/* Clear registers to propagate the carry bit */
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" xor %%r8, %%r8;"
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" xor %%r9, %%r9;"
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" xor %%r10, %%r10;"
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" xor %%r11, %%r11;"
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" xor %1, %1;"
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" xor %%r8d, %%r8d;"
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" xor %%r9d, %%r9d;"
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" xor %%r10d, %%r10d;"
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" xor %%r11d, %%r11d;"
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" xor %k1, %k1;"
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/* Begin addition chain */
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" addq 0(%3), %0;"
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@ -94,7 +94,7 @@ static inline void fadd(u64 *out, const u64 *f1, const u64 *f2)
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" cmovc %0, %%rax;"
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/* Step 2: Add carry*38 to the original sum */
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" xor %%rcx, %%rcx;"
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" xor %%ecx, %%ecx;"
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" add %%rax, %%r8;"
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" adcx %%rcx, %%r9;"
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" movq %%r9, 8(%1);"
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@ -166,28 +166,28 @@ static inline void fmul(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Compute src1[0] * src2 */
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" movq 0(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " movq %%r8, 0(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " movq %%r8, 0(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " movq %%r10, 8(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;"
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/* Compute src1[1] * src2 */
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" movq 8(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 8(%0), %%r8;" " movq %%r8, 8(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 8(%0), %%r8;" " movq %%r8, 8(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 16(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[2] * src2 */
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" movq 16(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 16(%0), %%r8;" " movq %%r8, 16(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 16(%0), %%r8;" " movq %%r8, 16(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 24(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[3] * src2 */
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" movq 24(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 24(%0), %%r8;" " movq %%r8, 24(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 24(%0), %%r8;" " movq %%r8, 24(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 32(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " movq %%rbx, 40(%0);" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " movq %%r14, 48(%0);" " mov $0, %%rax;"
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@ -201,7 +201,7 @@ static inline void fmul(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 32(%1), %%r8, %%r13;"
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" xor %3, %3;"
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" xor %k3, %k3;"
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" adoxq 0(%1), %%r8;"
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" mulxq 40(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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@ -247,28 +247,28 @@ static inline void fmul2(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Compute src1[0] * src2 */
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" movq 0(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " movq %%r8, 0(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " movq %%r8, 0(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " movq %%r10, 8(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;"
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/* Compute src1[1] * src2 */
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" movq 8(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 8(%0), %%r8;" " movq %%r8, 8(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 8(%0), %%r8;" " movq %%r8, 8(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 16(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[2] * src2 */
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" movq 16(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 16(%0), %%r8;" " movq %%r8, 16(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 16(%0), %%r8;" " movq %%r8, 16(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 24(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[3] * src2 */
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" movq 24(%1), %%rdx;"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 24(%0), %%r8;" " movq %%r8, 24(%0);"
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" mulxq 0(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 24(%0), %%r8;" " movq %%r8, 24(%0);"
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" mulxq 8(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 32(%0);"
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" mulxq 16(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " movq %%rbx, 40(%0);" " mov $0, %%r8;"
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" mulxq 24(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " movq %%r14, 48(%0);" " mov $0, %%rax;"
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@ -278,29 +278,29 @@ static inline void fmul2(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Compute src1[0] * src2 */
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" movq 32(%1), %%rdx;"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " movq %%r8, 64(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " movq %%r10, 72(%0);"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " movq %%r8, 64(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " movq %%r10, 72(%0);"
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" mulxq 48(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;"
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" mulxq 56(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;"
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/* Compute src1[1] * src2 */
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" movq 40(%1), %%rdx;"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 72(%0), %%r8;" " movq %%r8, 72(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 80(%0);"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 72(%0), %%r8;" " movq %%r8, 72(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 80(%0);"
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" mulxq 48(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 56(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[2] * src2 */
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" movq 48(%1), %%rdx;"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 80(%0), %%r8;" " movq %%r8, 80(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 88(%0);"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 80(%0), %%r8;" " movq %%r8, 80(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 88(%0);"
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" mulxq 48(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " mov $0, %%r8;"
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" mulxq 56(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;"
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/* Compute src1[3] * src2 */
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" movq 56(%1), %%rdx;"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10, %%r10;" " adcxq 88(%0), %%r8;" " movq %%r8, 88(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 96(%0);"
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" mulxq 32(%3), %%r8, %%r9;" " xor %%r10d, %%r10d;" " adcxq 88(%0), %%r8;" " movq %%r8, 88(%0);"
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" mulxq 40(%3), %%r10, %%r11;" " adox %%r9, %%r10;" " adcx %%rbx, %%r10;" " movq %%r10, 96(%0);"
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" mulxq 48(%3), %%rbx, %%r13;" " adox %%r11, %%rbx;" " adcx %%r14, %%rbx;" " movq %%rbx, 104(%0);" " mov $0, %%r8;"
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" mulxq 56(%3), %%r14, %%rdx;" " adox %%r13, %%r14;" " adcx %%rax, %%r14;" " movq %%r14, 112(%0);" " mov $0, %%rax;"
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" adox %%rdx, %%rax;" " adcx %%r8, %%rax;" " movq %%rax, 120(%0);"
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@ -313,7 +313,7 @@ static inline void fmul2(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 32(%1), %%r8, %%r13;"
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" xor %3, %3;"
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" xor %k3, %k3;"
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" adoxq 0(%1), %%r8;"
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" mulxq 40(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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@ -346,7 +346,7 @@ static inline void fmul2(u64 *out, const u64 *f1, const u64 *f2, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 96(%1), %%r8, %%r13;"
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" xor %3, %3;"
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" xor %k3, %k3;"
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" adoxq 64(%1), %%r8;"
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" mulxq 104(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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@ -517,7 +517,7 @@ static inline void fsqr(u64 *out, const u64 *f, u64 *tmp)
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/* Step 1: Compute all partial products */
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" movq 0(%1), %%rdx;" /* f[0] */
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" mulxq 8(%1), %%r8, %%r14;" " xor %%r15, %%r15;" /* f[1]*f[0] */
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" mulxq 8(%1), %%r8, %%r14;" " xor %%r15d, %%r15d;" /* f[1]*f[0] */
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" mulxq 16(%1), %%r9, %%r10;" " adcx %%r14, %%r9;" /* f[2]*f[0] */
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" mulxq 24(%1), %%rax, %%rcx;" " adcx %%rax, %%r10;" /* f[3]*f[0] */
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" movq 24(%1), %%rdx;" /* f[3] */
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@ -527,7 +527,7 @@ static inline void fsqr(u64 *out, const u64 *f, u64 *tmp)
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" mulxq 16(%1), %%rax, %%rcx;" " mov $0, %%r14;" /* f[2]*f[1] */
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/* Step 2: Compute two parallel carry chains */
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" xor %%r15, %%r15;"
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" xor %%r15d, %%r15d;"
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" adox %%rax, %%r10;"
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" adcx %%r8, %%r8;"
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" adox %%rcx, %%r11;"
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@ -564,7 +564,7 @@ static inline void fsqr(u64 *out, const u64 *f, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 32(%1), %%r8, %%r13;"
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" xor %%rcx, %%rcx;"
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" xor %%ecx, %%ecx;"
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" adoxq 0(%1), %%r8;"
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" mulxq 40(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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@ -608,7 +608,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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asm volatile(
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/* Step 1: Compute all partial products */
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" movq 0(%1), %%rdx;" /* f[0] */
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" mulxq 8(%1), %%r8, %%r14;" " xor %%r15, %%r15;" /* f[1]*f[0] */
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" mulxq 8(%1), %%r8, %%r14;" " xor %%r15d, %%r15d;" /* f[1]*f[0] */
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" mulxq 16(%1), %%r9, %%r10;" " adcx %%r14, %%r9;" /* f[2]*f[0] */
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" mulxq 24(%1), %%rax, %%rcx;" " adcx %%rax, %%r10;" /* f[3]*f[0] */
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" movq 24(%1), %%rdx;" /* f[3] */
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@ -618,7 +618,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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" mulxq 16(%1), %%rax, %%rcx;" " mov $0, %%r14;" /* f[2]*f[1] */
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/* Step 2: Compute two parallel carry chains */
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" xor %%r15, %%r15;"
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" xor %%r15d, %%r15d;"
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" adox %%rax, %%r10;"
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" adcx %%r8, %%r8;"
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" adox %%rcx, %%r11;"
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@ -648,7 +648,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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/* Step 1: Compute all partial products */
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" movq 32(%1), %%rdx;" /* f[0] */
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" mulxq 40(%1), %%r8, %%r14;" " xor %%r15, %%r15;" /* f[1]*f[0] */
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" mulxq 40(%1), %%r8, %%r14;" " xor %%r15d, %%r15d;" /* f[1]*f[0] */
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" mulxq 48(%1), %%r9, %%r10;" " adcx %%r14, %%r9;" /* f[2]*f[0] */
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" mulxq 56(%1), %%rax, %%rcx;" " adcx %%rax, %%r10;" /* f[3]*f[0] */
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" movq 56(%1), %%rdx;" /* f[3] */
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@ -658,7 +658,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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" mulxq 48(%1), %%rax, %%rcx;" " mov $0, %%r14;" /* f[2]*f[1] */
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/* Step 2: Compute two parallel carry chains */
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" xor %%r15, %%r15;"
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" xor %%r15d, %%r15d;"
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" adox %%rax, %%r10;"
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" adcx %%r8, %%r8;"
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" adox %%rcx, %%r11;"
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@ -693,7 +693,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 32(%1), %%r8, %%r13;"
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" xor %%rcx, %%rcx;"
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" xor %%ecx, %%ecx;"
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" adoxq 0(%1), %%r8;"
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" mulxq 40(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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@ -726,7 +726,7 @@ static inline void fsqr2(u64 *out, const u64 *f, u64 *tmp)
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/* Step 1: Compute dst + carry == tmp_hi * 38 + tmp_lo */
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" mov $38, %%rdx;"
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" mulxq 96(%1), %%r8, %%r13;"
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" xor %%rcx, %%rcx;"
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" xor %%ecx, %%ecx;"
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" adoxq 64(%1), %%r8;"
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" mulxq 104(%1), %%r9, %%rbx;"
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" adcx %%r13, %%r9;"
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|
|
|
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Loading…
Reference in a new issue