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internal/sm2ec: loong64 p256MulBy2
This commit is contained in:
Sun Yimin
GitHub
parent
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commit
9ea23b037e
@ -15,6 +15,7 @@
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#define acc1 R8
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#define acc2 R9
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#define acc3 R10
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#define acc4 R11
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#define acc5 R12
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#define acc6 R13
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@ -24,7 +25,9 @@
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#define t1 R16
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#define t2 R17
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#define t3 R18
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#define t4 R19
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#define hlp0 R19
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#define hlp1 R30
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#define x0 R20
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#define x1 R21
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@ -35,6 +38,9 @@
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#define y2 R27
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#define y3 R31
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#define const0 R28
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#define const1 R29
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DATA p256p<>+0x00(SB)/8, $0xffffffffffffffff
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DATA p256p<>+0x08(SB)/8, $0xffffffff00000000
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DATA p256p<>+0x10(SB)/8, $0xffffffffffffffff
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@ -190,7 +196,7 @@ basic_path:
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MOVV (8*0)(y_ptr), t1
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MOVV (8*1)(y_ptr), t2
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MOVV (8*2)(y_ptr), t3
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MOVV (8*3)(y_ptr), t4
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MOVV (8*3)(y_ptr), hlp0
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// Conditional move
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MASKNEZ t0, t1, t1
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@ -205,9 +211,9 @@ basic_path:
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MASKEQZ t0, acc2, acc2
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OR t3, acc2
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MASKNEZ t0, t4, t4
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MASKNEZ t0, hlp0, hlp0
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MASKEQZ t0, acc3, acc3
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OR t4, acc3
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OR hlp0, acc3
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// Store result
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MOVV acc0, (8*0)(res_ptr)
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@ -225,7 +231,7 @@ basic_path:
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MOVV (8*4)(y_ptr), t1
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MOVV (8*5)(y_ptr), t2
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MOVV (8*6)(y_ptr), t3
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MOVV (8*7)(y_ptr), t4
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MOVV (8*7)(y_ptr), hlp0
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// Conditional move
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MASKNEZ t0, t1, t1
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@ -240,9 +246,9 @@ basic_path:
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MASKEQZ t0, acc2, acc2
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OR t3, acc2
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MASKNEZ t0, t4, t4
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MASKNEZ t0, hlp0, hlp0
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MASKEQZ t0, acc3, acc3
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OR t4, acc3
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OR hlp0, acc3
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// Store result
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MOVV acc0, (8*4)(res_ptr)
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@ -260,7 +266,7 @@ basic_path:
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MOVV (8*8)(y_ptr), t1
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MOVV (8*9)(y_ptr), t2
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MOVV (8*10)(y_ptr), t3
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MOVV (8*11)(y_ptr), t4
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MOVV (8*11)(y_ptr), hlp0
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// Conditional move
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MASKNEZ t0, t1, t1
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@ -275,9 +281,9 @@ basic_path:
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MASKEQZ t0, acc2, acc2
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OR t3, acc2
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MASKNEZ t0, t4, t4
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MASKNEZ t0, hlp0, hlp0
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MASKEQZ t0, acc3, acc3
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OR t4, acc3
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OR hlp0, acc3
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// Store result
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MOVV acc0, (8*8)(res_ptr)
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@ -478,9 +484,9 @@ TEXT ·p256FromMont(SB),NOSPLIT,$0
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ADDV acc1, t1, acc5
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SGTU acc1, acc5, t3
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ADDV t3, acc2, acc6
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SGTU acc2, acc6, t4
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SGTU acc2, acc6, hlp0
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ADDV $1, t2, t2
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ADDV t4, t2, t2 // no carry
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ADDV hlp0, t2, t2 // no carry
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ADDV acc3, t2, acc7
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SGTU acc3, acc7, t0
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@ -517,6 +523,9 @@ TEXT ·p256Sqr(SB),NOSPLIT,$0
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MOVV (8*1)(x_ptr), x1
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MOVV (8*2)(x_ptr), x2
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MOVV (8*3)(x_ptr), x3
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MOVV p256one<>+0x08(SB), const0
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ADDV $1, const0, const1
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sqrLoop:
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SUBV $1, y_ptr
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@ -564,9 +573,9 @@ TEXT sm2P256SqrInternal<>(SB),NOSPLIT,$0
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ADDV t1, acc4, acc4
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SGTU t1, acc4, t3
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ADDV t2, acc4, acc4
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SGTU t2, acc4, t4
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SGTU t2, acc4, hlp0
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// ADC $0, acc5
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OR t3, t4, acc5
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OR t3, hlp0, acc5
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MULV x1, x3, t0
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// ADCS t0, acc4
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@ -602,14 +611,14 @@ TEXT sm2P256SqrInternal<>(SB),NOSPLIT,$0
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// ALSLV $1, t2, acc4, acc4
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SLLV $1, acc4, acc4
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ADDV t2, acc4, acc4
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SRLV $63, acc5, t4
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SRLV $63, acc5, hlp0
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// ALSLV $1, t3, acc5, acc5
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SLLV $1, acc5, acc5
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ADDV t3, acc5, acc5
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SRLV $63, acc6, acc7
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// ALSLV $1, t4, acc6, acc6
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// ALSLV $1, hlp0, acc6, acc6
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SLLV $1, acc6, acc6
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ADDV t4, acc6, acc6
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ADDV hlp0, acc6, acc6
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// Missing products
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MULV x0, x0, acc0
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@ -793,17 +802,15 @@ TEXT sm2P256SqrInternal<>(SB),NOSPLIT,$0
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// Final reduction
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ADDV $1, y0, acc4
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SGTU y0, acc4, t1
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MOVV p256one<>+0x08(SB), t2
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ADDV t2, t1, t1 // no carry
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ADDV const0, t1, t1 // no carry
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ADDV y1, t1, acc5
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SGTU y1, acc5, t3
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ADDV t3, y2, acc6
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SGTU y2, acc6, t4
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ADDV $1, t2, t2
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ADDV t4, t2, t2 // no carry
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SGTU y2, acc6, hlp0
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ADDV hlp0, const1, t2 // no carry
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ADDV y3, t2, acc7
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SGTU y3, acc7, t4
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OR t0, t4, t0
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SGTU y3, acc7, hlp0
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OR t0, hlp0, t0
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MASKNEZ t0, y0, y0
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MASKEQZ t0, acc4, acc4
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@ -892,8 +899,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc2, acc2
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SGTU t0, acc2, t3
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ADDV t2, acc2, acc2
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SGTU t2, acc2, t4
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OR t3, t4, t2
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SGTU t2, acc2, hlp0
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OR t3, hlp0, t2
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MULHVU y1, x1, y0
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MULV y1, x2, t0
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@ -901,8 +908,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc3, acc3
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SGTU t0, acc3, t3
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ADDV t2, acc3, acc3
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SGTU t2, acc3, t4
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OR t3, t4, t2
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SGTU t2, acc3, hlp0
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OR t3, hlp0, t2
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MULHVU y1, x2, acc6
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MULV y1, x3, t0
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@ -910,8 +917,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc4, acc4
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SGTU t0, acc4, t3
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ADDV t2, acc4, acc4
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SGTU t2, acc4, t4
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OR t3, t4, acc5
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SGTU t2, acc4, hlp0
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OR t3, hlp0, acc5
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MULHVU y1, x3, acc7
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// ADDS t1, acc2
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@ -921,14 +928,14 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV y0, acc3, acc3
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SGTU y0, acc3, t3
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ADDV t2, acc3, acc3
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SGTU t2, acc3, t4
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OR t3, t4, t2
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SGTU t2, acc3, hlp0
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OR t3, hlp0, t2
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// ADCS acc6, acc4
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ADDV acc6, acc4, acc4
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SGTU acc6, acc4, t3
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ADDV t2, acc4, acc4
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SGTU t2, acc4, t4
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OR t3, t4, t2
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SGTU t2, acc4, hlp0
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OR t3, hlp0, t2
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// ADC acc7, acc5
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ADDV t2, acc5, acc5
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ADDV acc7, acc5, acc5
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@ -976,8 +983,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc3, acc3
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SGTU t0, acc3, t3
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ADDV t2, acc3, acc3
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SGTU t2, acc3, t4
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OR t3, t4, t2
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SGTU t2, acc3, hlp0
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OR t3, hlp0, t2
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MULHVU y2, x1, y0
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MULV y2, x2, t0
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@ -985,8 +992,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc0, acc0
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SGTU t0, acc0, t3
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ADDV t2, acc0, acc0
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SGTU t2, acc0, t4
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OR t3, t4, t2
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SGTU t2, acc0, hlp0
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OR t3, hlp0, t2
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MULHVU y2, x2, y1
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MULV y2, x3, t0
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@ -994,8 +1001,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc1, acc1
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SGTU t0, acc1, t3
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ADDV t2, acc1, acc1
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SGTU t2, acc1, t4
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OR t3, t4, acc6
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SGTU t2, acc1, hlp0
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OR t3, hlp0, acc6
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MULHVU y2, x3, acc7
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// ADDS t1, acc3
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@ -1005,14 +1012,14 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV y0, acc4, acc4
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SGTU y0, acc4, t3
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ADDV t2, acc4, acc4
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SGTU t2, acc4, t4
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OR t3, t4, t2
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SGTU t2, acc4, hlp0
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OR t3, hlp0, t2
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// ADCS y1, acc5
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ADDV y1, acc5, acc5
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SGTU y1, acc5, t3
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ADDV t2, acc5, acc5
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SGTU t2, acc5, t4
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OR t3, t4, t2
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SGTU t2, acc5, hlp0
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OR t3, hlp0, t2
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// ADC acc7, acc6
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ADDV t2, acc6, acc6
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ADDV acc7, acc6, acc6
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@ -1060,8 +1067,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc4, acc4
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SGTU t0, acc4, t3
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ADDV t2, acc4, acc4
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SGTU t2, acc4, t4
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OR t3, t4, t2
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SGTU t2, acc4, hlp0
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OR t3, hlp0, t2
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MULHVU y3, x1, y0
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MULV y3, x2, t0
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@ -1069,8 +1076,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc5, acc5
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SGTU t0, acc5, t3
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ADDV t2, acc5, acc5
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SGTU t2, acc5, t4
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OR t3, t4, t2
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SGTU t2, acc5, hlp0
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OR t3, hlp0, t2
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MULHVU y3, x2, y1
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MULV y3, x3, t0
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@ -1078,8 +1085,8 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV t0, acc6, acc6
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SGTU t0, acc6, t3
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ADDV t2, acc6, acc6
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SGTU t2, acc6, t4
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OR t3, t4, acc7
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SGTU t2, acc6, hlp0
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OR t3, hlp0, acc7
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MULHVU y3, x3, t0
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// ADDS t1, acc4
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@ -1089,14 +1096,14 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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ADDV y0, acc5, acc5
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SGTU y0, acc5, t3
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ADDV t2, acc5, acc5
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SGTU t2, acc5, t4
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OR t3, t4, t2
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SGTU t2, acc5, hlp0
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OR t3, hlp0, t2
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// ADCS y1, acc6
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ADDV y1, acc6, acc6
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SGTU y1, acc6, t3
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ADDV t2, acc6, acc6
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SGTU t2, acc6, t4
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OR t3, t4, t2
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SGTU t2, acc6, hlp0
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OR t3, hlp0, t2
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// ADC t0, acc7
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ADDV t2, acc7, acc7
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ADDV t0, acc7, acc7
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@ -1154,17 +1161,15 @@ TEXT sm2P256MulInternal<>(SB),NOSPLIT,$0
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// Final reduction
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ADDV $1, y0, acc4
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SGTU y0, acc4, t1
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MOVV p256one<>+0x08(SB), t2
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ADDV t2, t1, t1 // no carry
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ADDV const0, t1, t1 // no carry
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ADDV y1, t1, acc5
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SGTU y1, acc5, t3
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ADDV t3, y2, acc6
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SGTU y2, acc6, t4
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ADDV $1, t2, t2
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ADDV t4, t2, t2 // no carry
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SGTU y2, acc6, hlp0
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ADDV hlp0, const1, t2 // no carry
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ADDV y3, t2, acc7
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SGTU y3, acc7, t4
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OR t0, t4, t0
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SGTU y3, acc7, hlp0
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OR t0, hlp0, t0
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MASKNEZ t0, y0, y0
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MASKEQZ t0, acc4, acc4
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@ -1191,6 +1196,9 @@ TEXT ·p256Mul(SB),NOSPLIT,$0
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MOVV in1+8(FP), x_ptr
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MOVV in2+16(FP), y_ptr
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MOVV p256one<>+0x08(SB), const0
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ADDV $1, const0, const1
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MOVV (8*0)(x_ptr), x0
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MOVV (8*1)(x_ptr), x1
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MOVV (8*2)(x_ptr), x2
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@ -1244,15 +1252,15 @@ TEXT ·p256OrdReduce(SB),NOSPLIT,$0
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// SBCS x2, acc2
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SGTU x2, acc2, t3
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SUBV x2, acc2, y2
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SGTU t2, y2, t4
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SGTU t2, y2, t0
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SUBV t2, y2, y2
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OR t3, t4, t2
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OR t3, t0, t2
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// SBCS x3, acc3
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SGTU x3, acc3, t3
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SUBV x3, acc3, y3
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SGTU t2, y3, t4
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SGTU t2, y3, t0
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SUBV t2, y3, y3
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OR t3, t4, t0
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OR t3, t0, t0
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MASKNEZ t0, y0, y0
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MASKEQZ t0, acc0, acc0
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@ -1303,6 +1311,9 @@ TEXT ·p256Sub(SB),NOSPLIT,$0
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MOVV (8*2)(y_ptr), x2
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MOVV (8*3)(y_ptr), x3
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MOVV p256one<>+0x08(SB), const0
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ADDV $1, const0, const1
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CALL sm2P256Subinternal<>(SB)
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MOVV x0, (8*0)(res_ptr)
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@ -1337,19 +1348,74 @@ TEXT sm2P256Subinternal<>(SB),NOSPLIT,$0
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MOVV $1, t1
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MASKEQZ t0, t1, t1
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MOVV p256one<>+0x08(SB), t2
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MASKEQZ t0, t2, t3
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ADDV $1, t2, t2
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MASKEQZ t0, t2, t2
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MASKEQZ t0, const0, t3
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MASKEQZ t0, const1, t2
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SGTU t1, acc0, t4
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SGTU t1, acc0, hlp0
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SUBV t1, acc0, x0
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ADDV t4, t3, t3 // no carry
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ADDV hlp0, t3, t3 // no carry
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SGTU t3, acc1, t1
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SUBV t3, acc1, x1
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SGTU t1, acc2, t4
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SGTU t1, acc2, hlp0
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SUBV t1, acc2, x2
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ADDV t4, t2, t1 // no carry
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ADDV hlp0, t2, t1 // no carry
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SUBV t1, acc3, x3
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RET
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/* ---------------------------------------*/
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// func p256MulBy2(res, in *p256Element)
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TEXT ·p256MulBy2(SB),NOSPLIT,$0
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MOVV res+0(FP), res_ptr
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MOVV in+8(FP), x_ptr
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MOVV (8*0)(x_ptr), y0
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||||
MOVV (8*1)(x_ptr), y1
|
||||
MOVV (8*2)(x_ptr), y2
|
||||
MOVV (8*3)(x_ptr), y3
|
||||
MOVV p256one<>+0x08(SB), const0
|
||||
ADDV $1, const0, const1
|
||||
p256MulBy2Inline
|
||||
MOVV x0, (8*0)(res_ptr)
|
||||
MOVV x1, (8*1)(res_ptr)
|
||||
MOVV x2, (8*2)(res_ptr)
|
||||
MOVV x3, (8*3)(res_ptr)
|
||||
RET
|
||||
|
||||
/* ---------------------------------------*/
|
||||
// (x3, x2, x1, x0) = 2(y3, y2, y1, y0)
|
||||
#define p256MulBy2Inline \
|
||||
SRLV $63, y0, t0; \
|
||||
SLLV $1, y0, x0; \
|
||||
SRLV $63, y1, t1; \
|
||||
SLLV $1, y1, x1; \
|
||||
ADDV t0, x1, x1; \
|
||||
SRLV $63, y2, t2; \
|
||||
SLLV $1, y2, x2; \
|
||||
ADDV t1, x2, x2; \
|
||||
SRLV $63, y3, t3; \
|
||||
SLLV $1, y3, x3; \
|
||||
ADDV t2, x3, x3; \
|
||||
;\
|
||||
ADDV $1, x0, acc4; \
|
||||
SGTU x0, acc4, t0; \
|
||||
ADDV const0, t0, t0; \
|
||||
ADDV x1, t0, acc5; \
|
||||
SGTU x1, acc5, t0; \
|
||||
ADDV t0, x2, acc6; \
|
||||
SGTU x2, acc6, t0; \
|
||||
ADDV const1, t0, t0; \
|
||||
ADDV x3, t0, acc7; \
|
||||
SGTU x3, acc7, t0; \
|
||||
OR t0, t3, t0; \
|
||||
MASKNEZ t0, x0, x0; \
|
||||
MASKEQZ t0, acc4, acc4; \
|
||||
OR acc4, x0; \
|
||||
MASKNEZ t0, x1, x1; \
|
||||
MASKEQZ t0, acc5, acc5; \
|
||||
OR acc5, x1; \
|
||||
MASKNEZ t0, x2, x2; \
|
||||
MASKEQZ t0, acc6, acc6; \
|
||||
OR acc6, x2; \
|
||||
MASKNEZ t0, x3, x3; \
|
||||
MASKEQZ t0, acc7, acc7; \
|
||||
OR acc7, x3
|
||||
|
||||
@ -56,3 +56,6 @@ func p256OrdReduce(s *p256OrdElement)
|
||||
|
||||
//go:noescape
|
||||
func p256Sub(res, in1, in2 *p256Element)
|
||||
|
||||
//go:noescape
|
||||
func p256MulBy2(res, in *p256Element)
|
||||
|
||||
@ -290,3 +290,32 @@ func TestP256Sub(t *testing.T) {
|
||||
t.Errorf("in1 < in2: got %v, want %v", res, want)
|
||||
}
|
||||
}
|
||||
|
||||
func p256MulBy2Test(t *testing.T, x, p, r *big.Int) {
|
||||
x1 := new(big.Int).Mul(x, r)
|
||||
x1 = x1.Mod(x1, p)
|
||||
y1 := new(big.Int).Mul(big.NewInt(2), r)
|
||||
y1 = y1.Mod(y1, p)
|
||||
ax := new(p256Element)
|
||||
res := new(p256Element)
|
||||
res2 := new(p256Element)
|
||||
fromBig(ax, x1)
|
||||
p256MulBy2(res2, ax)
|
||||
p256FromMont(res, res2)
|
||||
resInt := toBigInt(res)
|
||||
|
||||
expected := new(big.Int).Mul(x, big.NewInt(2))
|
||||
expected = expected.Mod(expected, p)
|
||||
if resInt.Cmp(expected) != 0 {
|
||||
t.Fatalf("p256MulBy2(%x) = %x, want %x", x, resInt, expected)
|
||||
}
|
||||
}
|
||||
|
||||
func TestP256MulBy2(t *testing.T) {
|
||||
p, _ := new(big.Int).SetString("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF", 16)
|
||||
r, _ := new(big.Int).SetString("10000000000000000000000000000000000000000000000000000000000000000", 16)
|
||||
pMinus1 := new(big.Int).Sub(p, big.NewInt(1))
|
||||
p256MulBy2Test(t, pMinus1, p, r)
|
||||
p256MulBy2Test(t, big.NewInt(0), p, r)
|
||||
p256MulBy2Test(t, big.NewInt(1), p, r)
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user