sm4: add some comments for asm code

emmansun · Jul 5, 2023 · 89f3b0f · 89f3b0f
1 parent 8cfd82d
commit 89f3b0f
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Showing 2 changed files with 4 additions and 4 deletions.
diff --git a/sm4/aesni_macros_amd64.s b/sm4/aesni_macros_amd64.s
@@ -302,8 +302,8 @@ GLOBL fk_mask<>(SB), 8, $16
 // -  x: 256 bits register as sbox input/output data
 // -  y: 256 bits temp register
 // -  z: 256 bits temp register
-// - xw: 128 bits temp register
-// - yw: 128 bits temp register
+// - xw: 128 bits temp register, x's related low 128 bits register!
+// - yw: 128 bits temp register, y's related low 128 bits register!
 // - xNibbleMask: 128 bits register stored nibble mask, should be loaded earlier.
 // - yNibbleMask: 256 bits register stored nibble mask, should be loaded earlier.
 #define AVX2_SM4_TAO_L1(x, y, z, xw, yw, xNibbleMask, yNibbleMask) \

diff --git a/sm4/asm_amd64.s b/sm4/asm_amd64.s
@@ -92,8 +92,8 @@
 // t0 ^= tao_l1(t1^t2^t3^xk)
 // parameters:
 // - index: round key index immediate number
-// - x: 256 bits temp register
-// - y: 256 bits temp register
+// - x: 256 bits temp register, MUST use XDWORD!
+// - y: 256 bits temp register, MUST use YDWORD!
 // - t0: 256 bits register for data as result
 // - t1: 256 bits register for data
 // - t2: 256 bits register for data