Commit ad2aa727 authored Aug 27, 2016 by Andy Polyakov

crypto/bn/*: x86[_64] division instruction doesn't handle constants, change...


crypto/bn/*: x86[_64] division instruction doesn't handle constants, change constraint from 'g' to 'r'.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 68b4a6e9)

parent bbf00748

crypto/bn/asm/x86_64-gcc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -203,7 +203,7 @@ BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
		BN_ULONG ret, waste;

		asm("divq %4":"=a"(ret), "=d"(waste)
		: "a"(l), "d"(h), "g"(d)
		: "a"(l), "d"(h), "r"(d)
		: "cc");

		return ret;

crypto/bn/bn_div.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -105,7 +105,7 @@ int BN_div(BIGNUM dv, BIGNUM rem, const BIGNUM m, const BIGNUM d,
		({ asm volatile ( \
		"divl %4" \
		: "=a"(q), "=d"(rem) \
		: "a"(n1), "d"(n0), "g"(d0) \
		: "a"(n1), "d"(n0), "r"(d0) \
		: "cc"); \
		q; \
		})
		@@ -120,7 +120,7 @@ int BN_div(BIGNUM dv, BIGNUM rem, const BIGNUM m, const BIGNUM d,
		({ asm volatile ( \
		"divq %4" \
		: "=a"(q), "=d"(rem) \
		: "a"(n1), "d"(n0), "g"(d0) \
		: "a"(n1), "d"(n0), "r"(d0) \
		: "cc"); \
		q; \
		})