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crypto/bn256/cloudflare: fix asm for dynamic linking (#24476)

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When using -buildmode=shared, R15 is clobbered by a global variable
access; use a different register instead.

Fixes: #24439
This commit is contained in:
uji
2022-03-09 08:23:13 +09:00
committed by GitHub
parent 0a4ec1dde5
commit ec64358ac9
3 changed files with 16 additions and 16 deletions
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14
crypto/bn256/cloudflare/gfp_amd64.s
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@@ -49,7 +49,7 @@ TEXT ·gfpNeg(SB),0,$0-16
SBBQ 24(DI), R11
MOVQ $0, AX
gfpCarry(R8,R9,R10,R11,AX, R12,R13,R14,R15,BX)
gfpCarry(R8,R9,R10,R11,AX, R12,R13,R14,CX,BX)
MOVQ c+0(FP), DI
storeBlock(R8,R9,R10,R11, 0(DI))
@@ -68,7 +68,7 @@ TEXT ·gfpAdd(SB),0,$0-24
ADCQ 24(SI), R11
ADCQ $0, R12
gfpCarry(R8,R9,R10,R11,R12, R13,R14,R15,AX,BX)
gfpCarry(R8,R9,R10,R11,R12, R13,R14,CX,AX,BX)
MOVQ c+0(FP), DI
storeBlock(R8,R9,R10,R11, 0(DI))
@@ -83,7 +83,7 @@ TEXT ·gfpSub(SB),0,$0-24
MOVQ ·p2+0(SB), R12
MOVQ ·p2+8(SB), R13
MOVQ ·p2+16(SB), R14
MOVQ ·p2+24(SB), R15
MOVQ ·p2+24(SB), CX
MOVQ $0, AX
SUBQ 0(SI), R8
@@ -94,12 +94,12 @@ TEXT ·gfpSub(SB),0,$0-24
CMOVQCC AX, R12
CMOVQCC AX, R13
CMOVQCC AX, R14
CMOVQCC AX, R15
CMOVQCC AX, CX
ADDQ R12, R8
ADCQ R13, R9
ADCQ R14, R10
ADCQ R15, R11
ADCQ CX, R11
MOVQ c+0(FP), DI
storeBlock(R8,R9,R10,R11, 0(DI))
@@ -115,7 +115,7 @@ TEXT ·gfpMul(SB),0,$160-24
mulBMI2(0(DI),8(DI),16(DI),24(DI), 0(SI))
storeBlock( R8, R9,R10,R11, 0(SP))
storeBlock(R12,R13,R14,R15, 32(SP))
storeBlock(R12,R13,R14,CX, 32(SP))
gfpReduceBMI2()
JMP end
@@ -125,5 +125,5 @@ nobmi2Mul:
end:
MOVQ c+0(FP), DI
storeBlock(R12,R13,R14,R15, 0(DI))
storeBlock(R12,R13,R14,CX, 0(DI))
RET