mirror of https://github.com/cheat/cheat.git
112 lines
2.4 KiB
ArmAsm
112 lines
2.4 KiB
ArmAsm
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// +build amd64
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#include "textflag.h"
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#include "fp_amd64.h"
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// func cmovAmd64(x, y *Elt, n uint)
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TEXT ·cmovAmd64(SB),NOSPLIT,$0-24
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MOVQ x+0(FP), DI
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MOVQ y+8(FP), SI
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MOVQ n+16(FP), BX
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cselect(0(DI),0(SI),BX)
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RET
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// func cswapAmd64(x, y *Elt, n uint)
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TEXT ·cswapAmd64(SB),NOSPLIT,$0-24
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MOVQ x+0(FP), DI
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MOVQ y+8(FP), SI
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MOVQ n+16(FP), BX
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cswap(0(DI),0(SI),BX)
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RET
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// func subAmd64(z, x, y *Elt)
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TEXT ·subAmd64(SB),NOSPLIT,$0-24
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MOVQ z+0(FP), DI
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MOVQ x+8(FP), SI
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MOVQ y+16(FP), BX
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subtraction(0(DI),0(SI),0(BX))
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RET
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// func addsubAmd64(x, y *Elt)
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TEXT ·addsubAmd64(SB),NOSPLIT,$0-16
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MOVQ x+0(FP), DI
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MOVQ y+8(FP), SI
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addSub(0(DI),0(SI))
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RET
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#define addLegacy \
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additionLeg(0(DI),0(SI),0(BX))
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#define addBmi2Adx \
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additionAdx(0(DI),0(SI),0(BX))
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#define mulLegacy \
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integerMulLeg(0(SP),0(SI),0(BX)) \
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reduceFromDoubleLeg(0(DI),0(SP))
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#define mulBmi2Adx \
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integerMulAdx(0(SP),0(SI),0(BX)) \
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reduceFromDoubleAdx(0(DI),0(SP))
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#define sqrLegacy \
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integerSqrLeg(0(SP),0(SI)) \
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reduceFromDoubleLeg(0(DI),0(SP))
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#define sqrBmi2Adx \
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integerSqrAdx(0(SP),0(SI)) \
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reduceFromDoubleAdx(0(DI),0(SP))
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// func addAmd64(z, x, y *Elt)
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TEXT ·addAmd64(SB),NOSPLIT,$0-24
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MOVQ z+0(FP), DI
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MOVQ x+8(FP), SI
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MOVQ y+16(FP), BX
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CHECK_BMI2ADX(LADD, addLegacy, addBmi2Adx)
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// func mulAmd64(z, x, y *Elt)
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TEXT ·mulAmd64(SB),NOSPLIT,$64-24
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MOVQ z+0(FP), DI
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MOVQ x+8(FP), SI
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MOVQ y+16(FP), BX
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CHECK_BMI2ADX(LMUL, mulLegacy, mulBmi2Adx)
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// func sqrAmd64(z, x *Elt)
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TEXT ·sqrAmd64(SB),NOSPLIT,$64-16
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MOVQ z+0(FP), DI
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MOVQ x+8(FP), SI
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CHECK_BMI2ADX(LSQR, sqrLegacy, sqrBmi2Adx)
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// func modpAmd64(z *Elt)
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TEXT ·modpAmd64(SB),NOSPLIT,$0-8
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MOVQ z+0(FP), DI
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MOVQ (DI), R8
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MOVQ 8(DI), R9
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MOVQ 16(DI), R10
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MOVQ 24(DI), R11
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MOVL $19, AX
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MOVL $38, CX
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BTRQ $63, R11 // PUT BIT 255 IN CARRY FLAG AND CLEAR
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CMOVLCC AX, CX // C[255] ? 38 : 19
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// ADD EITHER 19 OR 38 TO C
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ADDQ CX, R8
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ADCQ $0, R9
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ADCQ $0, R10
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ADCQ $0, R11
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// TEST FOR BIT 255 AGAIN; ONLY TRIGGERED ON OVERFLOW MODULO 2^255-19
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MOVL $0, CX
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CMOVLPL AX, CX // C[255] ? 0 : 19
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BTRQ $63, R11 // CLEAR BIT 255
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// SUBTRACT 19 IF NECESSARY
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SUBQ CX, R8
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MOVQ R8, (DI)
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SBBQ $0, R9
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MOVQ R9, 8(DI)
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SBBQ $0, R10
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MOVQ R10, 16(DI)
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SBBQ $0, R11
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MOVQ R11, 24(DI)
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RET
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