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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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12
crypto/bn256/cloudflare/mul_bmi2_amd64.h
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@ -29,7 +29,7 @@
ADCQ $0, R14 \
\
MOVQ a2, DX \
MOVQ $0, R15 \
MOVQ $0, CX \
MULXQ 0+rb, AX, BX \
ADDQ AX, R10 \
ADCQ BX, R11 \
@ -43,7 +43,7 @@
MULXQ 24+rb, AX, BX \
ADCQ AX, R13 \
ADCQ BX, R14 \
ADCQ $0, R15 \
ADCQ $0, CX \
\
MOVQ a3, DX \
MULXQ 0+rb, AX, BX \
@ -52,13 +52,13 @@
MULXQ 16+rb, AX, BX \
ADCQ AX, R13 \
ADCQ BX, R14 \
ADCQ $0, R15 \
ADCQ $0, CX \
MULXQ 8+rb, AX, BX \
ADDQ AX, R12 \
ADCQ BX, R13 \
MULXQ 24+rb, AX, BX \
ADCQ AX, R14 \
ADCQ BX, R15
ADCQ BX, CX
#define gfpReduceBMI2() \
\ // m = (T * N') mod R, store m in R8:R9:R10:R11
@ -106,7 +106,7 @@
ADCQ 32(SP), R12 \
ADCQ 40(SP), R13 \
ADCQ 48(SP), R14 \
ADCQ 56(SP), R15 \
ADCQ 56(SP), CX \
ADCQ $0, AX \
\
gfpCarry(R12,R13,R14,R15,AX, R8,R9,R10,R11,BX)
gfpCarry(R12,R13,R14,CX,AX, R8,R9,R10,R11,BX)