tor-browser

commit 3ffb5536c10d97a20741ffa67273d8107028e8cf
parent d92b922fa3bcc892a679d885207e0aee915413d5
Author: André Bargull <andre.bargull@gmail.com>
Date:   Sat, 15 Nov 2025 10:15:23 +0000

Bug 1998457 - Part 2: Add imulq and umulq. r=spidermonkey-reviewers,iain

Add `imulq` and `umulq` similar to `imull` and `umull`.

Used in the next part.

Differential Revision: https://phabricator.services.mozilla.com/D271437

Diffstat:
M
js/src/jit/x64/Assembler-x64.h
 | 
6
++++++
M
js/src/jit/x64/BaseAssembler-x64.h
 | 
10
++++++++++

2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/js/src/jit/x64/Assembler-x64.h b/js/src/jit/x64/Assembler-x64.h
@@ -960,6 +960,12 @@ class Assembler : public AssemblerX86Shared {
     masm.popcntq_rr(src.encoding(), dest.encoding());
   }
 
+  void imulq(Register multiplier) {
+    // Consumes rax as the other argument and clobbers rdx, as the result is in
+    // rdx:rax.
+    masm.imulq_r(multiplier.encoding());
+  }
+  void umulq(Register multiplier) { masm.mulq_r(multiplier.encoding()); }
   void imulq(Imm32 imm, Register src, Register dest) {
     masm.imulq_ir(imm.value, src.encoding(), dest.encoding());
   }
diff --git a/js/src/jit/x64/BaseAssembler-x64.h b/js/src/jit/x64/BaseAssembler-x64.h
@@ -408,6 +408,11 @@ class BaseAssemblerX64 : public BaseAssembler {
     m_formatter.twoByteOp64(OP2_IMUL_GvEv, src, dst);
   }
 
+  void imulq_r(RegisterID multiplier) {
+    spew("imulq      %s", GPReg64Name(multiplier));
+    m_formatter.oneByteOp64(OP_GROUP3_Ev, multiplier, GROUP3_OP_IMUL);
+  }
+
   void imulq_mr(int32_t offset, RegisterID base, RegisterID dst) {
     spew("imulq      " MEM_ob ", %s", ADDR_ob(offset, base), GPReg64Name(dst));
     m_formatter.twoByteOp64(OP2_IMUL_GvEv, offset, base, dst);
@@ -424,6 +429,11 @@ class BaseAssemblerX64 : public BaseAssembler {
     }
   }
 
+  void mulq_r(RegisterID multiplier) {
+    spew("mulq       %s", GPReg64Name(multiplier));
+    m_formatter.oneByteOp64(OP_GROUP3_Ev, multiplier, GROUP3_OP_MUL);
+  }
+
   void cqo() {
     spew("cqo        ");
     m_formatter.oneByteOp64(OP_CDQ);