[PATCH v3 vkd3d 3/3] vkd3d-shader/hlsl: Implement floor().

[Nikolay Sivov]

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
---
 Makefile.am                  |  1 +
 libs/vkd3d-shader/hlsl.h     |  1 +
 libs/vkd3d-shader/hlsl.y     | 12 ++++++++++++
 libs/vkd3d-shader/hlsl_sm4.c |  4 ++++
 4 files changed, 18 insertions(+)

diff --git a/Makefile.am b/Makefile.am
index 20fee06..9c5a772 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,6 +60,7 @@ vkd3d_shader_tests = \
 	tests/cast-to-int.shader_test \
 	tests/cast-to-uint.shader_test \
 	tests/conditional.shader_test \
+	tests/floor.shader_test \
 	tests/hlsl-array-dimension.shader_test \
 	tests/hlsl-bool-cast.shader_test \
 	tests/hlsl-clamp.shader_test \
diff --git a/libs/vkd3d-shader/hlsl.h b/libs/vkd3d-shader/hlsl.h
index 57acf3a..c935426 100644
--- a/libs/vkd3d-shader/hlsl.h
+++ b/libs/vkd3d-shader/hlsl.h
@@ -293,6 +293,7 @@ enum hlsl_ir_expr_op
     HLSL_OP1_DSX,
     HLSL_OP1_DSY,
     HLSL_OP1_EXP2,
+    HLSL_OP1_FLOOR,
     HLSL_OP1_FRACT,
     HLSL_OP1_LOG2,
     HLSL_OP1_LOGIC_NOT,
diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 94eaec4..d69a8db 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -1653,6 +1653,17 @@ static bool intrinsic_cross(struct hlsl_ctx *ctx,
     return !!add_binary_arithmetic_expr(ctx, params->instrs, HLSL_OP2_ADD, &mul2->node, mul1_neg, loc);
 }
 
+static bool intrinsic_floor(struct hlsl_ctx *ctx,
+        const struct parse_initializer *params, const struct vkd3d_shader_location *loc)
+{
+    struct hlsl_ir_node *arg;
+
+    if (!(arg = intrinsic_float_convert_arg(ctx, params, params->args[0], loc)))
+        return false;
+
+    return !!add_unary_arithmetic_expr(ctx, params->instrs, HLSL_OP1_FLOOR, arg, loc);
+}
+
 static bool intrinsic_max(struct hlsl_ctx *ctx,
         const struct parse_initializer *params, const struct vkd3d_shader_location *loc)
 {
@@ -1720,6 +1731,7 @@ intrinsic_functions[] =
     {"abs",                                 1, true,  intrinsic_abs},
     {"clamp",                               3, true,  intrinsic_clamp},
     {"cross",                               2, true,  intrinsic_cross},
+    {"floor",                               1, true,  intrinsic_floor},
     {"max",                                 2, true,  intrinsic_max},
     {"min",                                 2, true,  intrinsic_min},
     {"pow",                                 2, true,  intrinsic_pow},
diff --git a/libs/vkd3d-shader/hlsl_sm4.c b/libs/vkd3d-shader/hlsl_sm4.c
index 2458018..2defc1f 100644
--- a/libs/vkd3d-shader/hlsl_sm4.c
+++ b/libs/vkd3d-shader/hlsl_sm4.c
@@ -1336,6 +1336,10 @@ static void write_sm4_expr(struct hlsl_ctx *ctx,
                     write_sm4_unary_op(buffer, VKD3D_SM4_OP_EXP, &expr->node, arg1, 0);
                     break;
 
+                case HLSL_OP1_FLOOR:
+                    write_sm4_unary_op(buffer, VKD3D_SM4_OP_ROUND_NI, &expr->node, arg1, 0);
+                    break;
+
                 case HLSL_OP1_LOG2:
                     write_sm4_unary_op(buffer, VKD3D_SM4_OP_LOG, &expr->node, arg1, 0);
                     break;
-- 
2.34.1