6090 - new instruction: multiply by immediate - mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

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author	Kartik Agaram <vc@akkartik.com>	2020-03-06 18:31:14 -0800
committer	Kartik Agaram <vc@akkartik.com>	2020-03-06 18:34:27 -0800
commit	8f256f1f2ee6a2a49816dd23d26cd120f526bf0b (patch)
tree	314294998b527980cdf85ecb51386642bfbe3af4 /html/003trace.cc.html
parent	4c19dd3968d2ce733073774867d97cc96b4277e6 (diff)
download	mu-8f256f1f2ee6a2a49816dd23d26cd120f526bf0b.tar.gz

6090 - new instruction: multiply by immediate

This is a 3-operand instruction:
  r32 = rm32 * imm32

It looks like https://c9x.me/x86/html/file_module_x86_id_138.html has a
bug, implying the same opcode supports a 2-operand version. I don't see
that in the Intel manual pdf, or at alternative sites like https://www.felixcloutier.com/x86/imul

Native runs seem to validate my understanding.

In the process I also fixed a bug in the existing multiply instruction
0f af: the only flags it sets are OF and CF. The other existing multiply
instruction f7 was doing things right.

Diffstat (limited to 'html/003trace.cc.html')

0 files changed, 0 insertions, 0 deletions

void create_jid_from_null_returns_null(void **state); void create_jid_from_empty_string_returns_null(void **state); void create_jid_from_full_returns_full(void **state); void create_jid_from_full_returns_bare(void **state); void create_jid_from_full_returns_resourcepart(void **state); void create_jid_from_full_returns_localpart(void **state); void create_jid_from_full_returns_domainpart(void **state); void create_jid_from_full_nolocal_returns_full(void **state); void create_jid_from_full_nolocal_returns_bare(void **state); void create_jid_from_full_nolocal_returns_resourcepart(void **state); void create_jid_from_full_nolocal_returns_domainpart(void **state); void create_jid_from_full_nolocal_returns_null_localpart(void **state); void create_jid_from_bare_returns_null_full(void **state); void create_jid_from_bare_returns_null_resource(void **state); void create_jid_from_bare_returns_bare(void **state); void create_jid_from_bare_returns_localpart(void **state); void create_jid_from_bare_returns_domainpart(void **state); void create_room_jid_returns_room(void **state); void create_room_jid_returns_nick(void **state); void create_with_slash_in_resource(void **state); void create_with_at_in_resource(void **state); void create_with_at_and_slash_in_resource(void **state); void create_full_with_trailing_slash(void **state); void returns_fulljid_when_exists(void **state); void returns_barejid_when_fulljid_not_exists(void **state);


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