[Tinycc-devel] [PATCH] Add Support of SSE Instructions ldmxcsr and stmxcsr

[Ziyao]

Hi list,

I have made a patch which adds the support of two SEE instructions to TinyCC
--ldmxcsr and stmxcsr.Both x86_64 and i386 build have been tested on Ubuntu 
18.04LTS and they generate proper machine code which is the same as what
GNU as does.It only includes 4 lines.

Best wishes,
Ziyao

----
diff --git a/i386-asm.h b/i386-asm.h
index 65d5179..dfc5183 100644
--- a/i386-asm.h
+++ b/i386-asm.h
@@ -447,6 +447,8 @@ ALT(DEF_ASM_OP2(psrlq, 0x0f73, 2, OPC_MODRM, OPT_IM8, 
OPT_MMXSSE ))
     DEF_ASM_OP2(pxor, 0x0fef, 0, OPC_MODRM, OPT_EA | OPT_MMXSSE, OPT_MMXSSE )
 
     /* sse */
+    DEF_ASM_OP1(ldmxcsr, 0x0fae, 2, OPC_MODRM, OPT_EA)
+    DEF_ASM_OP1(stmxcsr, 0x0fae, 3, OPC_MODRM, OPT_EA)
     DEF_ASM_OP2(movups, 0x0f10, 0, OPC_MODRM, OPT_EA | OPT_REG32, OPT_SSE )
 ALT(DEF_ASM_OP2(movups, 0x0f11, 0, OPC_MODRM, OPT_SSE, OPT_EA | OPT_REG32 ))
     DEF_ASM_OP2(movaps, 0x0f28, 0, OPC_MODRM, OPT_EA | OPT_REG32, OPT_SSE )
diff --git a/x86_64-asm.h b/x86_64-asm.h
index cb9eb16..4e03773 100644
--- a/x86_64-asm.h
+++ b/x86_64-asm.h
@@ -483,6 +483,8 @@ ALT(DEF_ASM_OP2(psrlq, 0x0f73, 2, OPC_MODRM, OPT_IM8, 
OPT_MMXSSE ))
     DEF_ASM_OP2(pxor, 0x0fef, 0, OPC_MODRM, OPT_EA | OPT_MMXSSE, OPT_MMXSSE )
 
     /* sse */
+    DEF_ASM_OP1(ldmxcsr, 0x0fae, 2, OPC_MODRM, OPT_EA)
+    DEF_ASM_OP1(stmxcsr, 0x0fae, 3, OPC_MODRM, OPT_EA)
     DEF_ASM_OP2(movups, 0x0f10, 0, OPC_MODRM, OPT_EA | OPT_REG32, OPT_SSE )
 ALT(DEF_ASM_OP2(movups, 0x0f11, 0, OPC_MODRM, OPT_SSE, OPT_EA | OPT_REG32 ))
     DEF_ASM_OP2(movaps, 0x0f28, 0, OPC_MODRM, OPT_EA | OPT_REG32, OPT_SSE )