From bc087759c80791cb3d76744486c2140467f6c7d4 Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Mon, 16 Aug 2021 00:00:05 +0200
Subject: [PATCH] Add soft-float, no-sse, no-avx, no-mmx for x64 targets.

---
 src/build/build_options.h |  3 +++
 src/build/project.c       |  3 +++
 src/compiler/target.c     | 18 +++++++++++++++---
 src/compiler/target.h     |  3 +++
 4 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/build/build_options.h b/src/build/build_options.h
index d4b1fba0a..19d8a1c09 100644
--- a/src/build/build_options.h
+++ b/src/build/build_options.h
@@ -237,6 +237,9 @@ typedef struct
 		bool no_memcpy_pass : 1;
 		bool trap_on_wrap : 1;
 		bool safe_mode : 1;
+		bool no_sse : 1;
+		bool no_mmx : 1;
+		bool no_avx : 1;
 	} feature;
 } BuildTarget;
 
diff --git a/src/build/project.c b/src/build/project.c
index 21d756d2d..ba45035e7 100644
--- a/src/build/project.c
+++ b/src/build/project.c
@@ -197,6 +197,9 @@ void project_add_target(Project *project, TomlValue *wrapped_table, const char *
 	// Use the fact that they correspond to 0, 1, -1
 	target->feature.struct_return = get_valid_bool(table, "stack-struct-return", type, STRUCT_RETURN_DEFAULT);
 	target->feature.soft_float = get_valid_bool(table, "soft-float", type, SOFT_FLOAT_DEFAULT);
+	target->feature.no_avx = get_valid_bool(table, "no-avx", type, false);
+	target->feature.no_sse = get_valid_bool(table, "no-sse", type, false);
+	target->feature.no_mmx = get_valid_bool(table, "no-mmx", type, false);
 }
 
 static void project_add_targets(Project *project, TomlTable *table, const char *type, const char *type_key, TargetType target_type)
diff --git a/src/compiler/target.c b/src/compiler/target.c
index 436444a00..aa96b408e 100644
--- a/src/compiler/target.c
+++ b/src/compiler/target.c
@@ -381,11 +381,15 @@ static inline void target_setup_x86_abi(BuildTarget *target)
 }
 
 
-static inline void target_setup_x64_abi(void)
+static inline void target_setup_x64_abi(BuildTarget *target)
 {
 	platform_target.abi = ABI_X64;
 	platform_target.x64.avx_level = AVX;
 	platform_target.x64.is_win64 = platform_target.os == OS_TYPE_WIN32;
+	if (target->feature.no_avx) platform_target.x64.avx_level = AVX_NONE;
+	if (target->feature.no_mmx) platform_target.x64.no_mmx = true;
+	if (target->feature.no_sse) platform_target.x64.no_sse = true;
+	if (target->feature.soft_float) platform_target.x64.soft_float = true;
 	if (platform_target.environment_type == ENV_TYPE_GNU)
 	{
 		platform_target.x64.is_mingw64 = platform_target.x64.is_win64;
@@ -1110,8 +1114,16 @@ void *llvm_target_machine_create(void)
 		reloc_mode = LLVMRelocDynamicNoPic;
 	}
 
+	scratch_buffer_clear();
+	if (platform_target.arch == ARCH_TYPE_X86_64)
+	{
+		if (platform_target.x64.avx_level == AVX_NONE) scratch_buffer_append("-avx,");
+		if (platform_target.x64.no_sse) scratch_buffer_append("-sse,");
+		if (platform_target.x64.soft_float) scratch_buffer_append("+soft-float,");
+		if (platform_target.x64.no_mmx) scratch_buffer_append("-mmx,");
+	}
 	void *result = LLVMCreateTargetMachine(target, platform_target.target_triple,
-	                                       platform_target.cpu ?: "", platform_target.features ?: "",
+	                                       platform_target.cpu ?: "", scratch_buffer_to_string(),
 	                                       (LLVMCodeGenOptLevel)platform_target.llvm_opt_level,
 	                                       reloc_mode, LLVMCodeModelDefault);
 	if (!result) error_exit("Failed to create target machine.");
@@ -1301,7 +1313,7 @@ void target_setup(BuildTarget *target)
 			target_setup_x86_abi(target);
 			break;
 		case ARCH_TYPE_X86_64:
-			target_setup_x64_abi();
+			target_setup_x64_abi(target);
 			platform_target.x64.avx_level = 0; /* TODO */
 			if (platform_target.os == OS_TYPE_WIN32)
 			{
diff --git a/src/compiler/target.h b/src/compiler/target.h
index 5646729e1..dd3de8850 100644
--- a/src/compiler/target.h
+++ b/src/compiler/target.h
@@ -266,6 +266,9 @@ typedef struct
 		struct
 		{
 			AVXLevel avx_level : 3;
+			bool no_mmx : 1;
+			bool no_sse : 1;
+			bool soft_float : 1;
 			bool is_win64 : 1;
 			bool is_mingw64 : 1;
 			bool pass_int128_vector_in_mem : 1;