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GET /api/patches/2231417/?format=api
{ "id": 2231417, "url": "http://patchwork.ozlabs.org/api/patches/2231417/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430172204.1006673-4-pbonzini@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260430172204.1006673-4-pbonzini@redhat.com>", "list_archive_url": null, "date": "2026-04-30T17:21:09", "name": "[PULL,03/58] target/i386/tcg: simplify decoding of 0F 38 F0...FF", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "951b45eb7bbe2aa2e438aee46bdcc12414cfb77d", "submitter": { "id": 2701, "url": "http://patchwork.ozlabs.org/api/people/2701/?format=api", "name": "Paolo Bonzini", "email": "pbonzini@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430172204.1006673-4-pbonzini@redhat.com/mbox/", "series": [ { "id": 502347, "url": "http://patchwork.ozlabs.org/api/series/502347/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502347", "date": "2026-04-30T17:21:16", "name": "[PULL,01/58] pythondeps: bump to meson 1.11.1", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502347/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231417/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231417/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=MrLFw1ov;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=d4J/0HbB;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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In reality, this is\njust the CRC32 instruction (chosen by 0xF2) plus a data size override\nprefix. All other instruction in the range that use the 0xF2 prefix\nare VEX-encoded and therefore they do not support multiple prefixes.\nBecause of this, it is possible to handle the four prefixes normally\nusing decode_by_prefix; the 0x66 0xF2 combination for CRC32 is handled\nnaturally by the \"v\" operand size.\n\nSigned-off-by: Paolo Bonzini <pbonzini@redhat.com>\n---\n target/i386/tcg/decode-new.c.inc | 21 +++------------------\n 1 file changed, 3 insertions(+), 18 deletions(-)", "diff": "diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.c.inc\nindex c8b5bd6ad26..ac181308ca4 100644\n--- a/target/i386/tcg/decode-new.c.inc\n+++ b/target/i386/tcg/decode-new.c.inc\n@@ -873,8 +873,8 @@ static const X86OpEntry opcodes_0F38_00toEF[240] = {\n [0xef] = X86_OP_ENTRY3(CMPccXADD, M,y, G,y, B,y, vex13 xchg chk(o64) cpuid(CMPCCXADD) p_66),\n };\n \n-/* five rows for no prefix, 66, F3, F2, 66+F2 */\n-static const X86OpEntry opcodes_0F38_F0toFF[16][5] = {\n+/* four rows for no prefix, 66, F3, F2 (including 66+F2 operand size override) */\n+static const X86OpEntry opcodes_0F38_F0toFF[16][4] = {\n /*\n * MOVBE and CRC32 are incorrectly listed as always doing 32-bit operation\n * without prefix and 16-bit operation with 0x66.\n@@ -884,49 +884,42 @@ static const X86OpEntry opcodes_0F38_F0toFF[16][5] = {\n X86_OP_ENTRYwr(MOVBE, G,v, M,v, cpuid(MOVBE)),\n {},\n X86_OP_ENTRY2(CRC32, G,d, E,b, cpuid(SSE42)),\n- X86_OP_ENTRY2(CRC32, G,d, E,b, cpuid(SSE42)),\n },\n [1] = {\n X86_OP_ENTRYwr(MOVBE, M,v, G,v, cpuid(MOVBE)),\n X86_OP_ENTRYwr(MOVBE, M,v, G,v, cpuid(MOVBE)),\n {},\n X86_OP_ENTRY2(CRC32, G,d, E,v, cpuid(SSE42)),\n- X86_OP_ENTRY2(CRC32, G,d, E,v, cpuid(SSE42)),\n },\n [2] = {\n X86_OP_ENTRY3(ANDN, G,y, B,y, E,y, vex13 cpuid(BMI1)),\n {},\n {},\n {},\n- {},\n },\n [3] = {\n X86_OP_GROUP3(group17, B,y, None,None, E,y, vex13 cpuid(BMI1)),\n {},\n {},\n {},\n- {},\n },\n [5] = {\n X86_OP_ENTRY3(BZHI, G,y, E,y, B,y, vex13 cpuid(BMI1)),\n {},\n X86_OP_ENTRY3(PEXT, G,y, B,y, E,y, vex13 zextT0 cpuid(BMI2)),\n X86_OP_ENTRY3(PDEP, G,y, B,y, E,y, vex13 zextT0 cpuid(BMI2)),\n- {},\n },\n [6] = {\n {},\n X86_OP_ENTRY2(ADCX, G,y, E,y, cpuid(ADX)),\n X86_OP_ENTRY2(ADOX, G,y, E,y, cpuid(ADX)),\n X86_OP_ENTRY3(MULX, /* B,y, */ G,y, E,y, 2,y, vex13 cpuid(BMI2)),\n- {},\n },\n [7] = {\n X86_OP_ENTRY3(BEXTR, G,y, E,y, B,y, vex13 zextT0 cpuid(BMI1)),\n X86_OP_ENTRY3(SHLX, G,y, E,y, B,y, vex13 cpuid(BMI1)),\n X86_OP_ENTRY3(SARX, G,y, E,y, B,y, vex13 sextT0 cpuid(BMI1)),\n X86_OP_ENTRY3(SHRX, G,y, E,y, B,y, vex13 zextT0 cpuid(BMI1)),\n- {},\n },\n };\n \n@@ -936,15 +929,7 @@ static void decode_0F38(DisasContext *s, CPUX86State *env, X86OpEntry *entry, ui\n if (*b < 0xf0) {\n *entry = opcodes_0F38_00toEF[*b];\n } else {\n- int row = 0;\n- if (s->prefix & PREFIX_REPZ) {\n- /* The REPZ (F3) prefix has priority over 66 */\n- row = 2;\n- } else {\n- row += s->prefix & PREFIX_REPNZ ? 3 : 0;\n- row += s->prefix & PREFIX_DATA ? 1 : 0;\n- }\n- *entry = opcodes_0F38_F0toFF[*b & 15][row];\n+ *entry = *decode_by_prefix(s, opcodes_0F38_F0toFF[*b & 15]);\n }\n }\n \n", "prefixes": [ "PULL", "03/58" ] }